U.S. patent application number 15/749903 was filed with the patent office on 2018-08-02 for apparatus for packaging a product in a respective preformed wrapping.
The applicant listed for this patent is PULSAR S.R.L.. Invention is credited to Massimo FRANZAROLI.
Application Number | 20180215486 15/749903 |
Document ID | / |
Family ID | 57955933 |
Filed Date | 2018-08-02 |
United States Patent
Application |
20180215486 |
Kind Code |
A1 |
FRANZAROLI; Massimo |
August 2, 2018 |
APPARATUS FOR PACKAGING A PRODUCT IN A RESPECTIVE PREFORMED
WRAPPING
Abstract
An apparatus-for packaging a product in a respective preformed
or ready-formed wrapper, preferably made of a suitable film, such
as plastic film, and being in particular in the form of a bag, the
ready-formed wrapper having a respective open end, allowing the
product to be inserted into the wrapper and the product being in
particular in the form of a paper product for personal or domestic
use, preferably being in the form of a group of articles,
especially being in the form of packets, in particular packets of
face wipes, hand towels or handkerchiefs, or rolls, preferably of
toilet paper or kitchen paper, or the like; the apparatus comprises
means for feeding the preformed wrappers, means for feeding the
product and means for inserting the product into the ready-formed
wrapper through the open end and comprises means for clamping the
preformed wrapper when the product is inserted into the preformed
wrapper.
Inventors: |
FRANZAROLI; Massimo; (Castel
Maggiore (Bologna), IT) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
PULSAR S.R.L. |
Castel Maggiore (Bologna) |
|
IT |
|
|
Family ID: |
57955933 |
Appl. No.: |
15/749903 |
Filed: |
August 4, 2016 |
PCT Filed: |
August 4, 2016 |
PCT NO: |
PCT/IB2016/054718 |
371 Date: |
February 2, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B65B 43/30 20130101;
G06F 9/451 20180201; B65B 39/007 20130101; B65B 35/405 20130101;
B65B 43/12 20130101; B65B 35/44 20130101; B65B 5/067 20130101; B65B
25/146 20130101; B65B 61/005 20130101; B65B 43/28 20130101; B65B
43/14 20130101; B65B 39/06 20130101; B65B 25/14 20130101; B65B
51/146 20130101; B65G 15/16 20130101; B65B 39/02 20130101 |
International
Class: |
B65B 5/06 20060101
B65B005/06; B65B 25/14 20060101 B65B025/14; B65B 35/44 20060101
B65B035/44; B65B 39/00 20060101 B65B039/00; B65B 43/14 20060101
B65B043/14; B65B 43/28 20060101 B65B043/28; B65B 61/00 20060101
B65B061/00 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 6, 2015 |
IT |
202015000042988 |
Claims
1-112. (canceled)
113. An apparatus for packaging a product in a respective preformed
or ready-formed wrapper, preferably made of a suitable film, such
as plastic film, and being in particular in the form of a bag, the
ready-formed or preformed wrapper having a respective open end,
allowing the product to be inserted into the wrapper and the
product being in particular in the form of a product for personal
or domestic use, preferably made of paper or like material and
preferably being in the form of a group of articles comprising one
or more layers placed on top of each other, and especially being in
the form of packets, in particular packets of face wipes, hand
towels or handkerchiefs, or rolls, in particular rolls of paper,
such as rolls of toilet paper or rolls of kitchen paper, or the
like; the apparatus comprising means for feeding the preformed
wrappers, means for feeding the product and means for inserting the
product into the ready-formed wrapper through the open end, means
for longitudinally feeding and pushing the product or respective
group of articles, and which are adapted to insert the product or
respective group of articles into a corresponding preformed wrapper
or bag in the open condition and/or to feed the ready-formed
wrapper or bag with the product inside it to and, in particular,
downstream of, the end closing means, and means for closing the
open end of the preformed wrapper or bag, and being wherein it
comprises means for clamping or gripping the preformed wrapper when
the product is inserted into the preformed wrapper.
114. The apparatus according to claim 113, wherein the means for
clamping the preformed wrapper operate on the wrapper when it is in
the open condition.
115. The apparatus according to claim 113, wherein the means for
clamping the preformed wrapper engage the wrapper at the respective
open end of it.
116. The apparatus according to claim 113, wherein the clamping
means are adapted to engage opposite, inside and outside faces of a
corresponding margin of the wrapper, in particular opposite,
preferably transversely opposite, margins of the wrapper.
117. The apparatus according to claim 113, wherein the means for
clamping the preformed wrapper comprise wrapper internal means,
wherein the means for clamping the preformed wrapper comprise
wrapper external means; and wherein the wrapper internal means and
the wrapper external means act in conjunction to clamp a
corresponding portion or margin of the wrapper.
118. The apparatus according to claim 113, wherein the means for
clamping the preformed wrapper comprise first and second means for
spreading open the mouth through which the product can be inserted,
and operating on opposite, in particular transversely opposite,
sides of the wrapper.
119. The apparatus according to claim 113, wherein it comprises
first and second external wrapper engagement means, in particular
operating on opposite, preferably transversely opposite, sides of
the wrapper.
120. The apparatus according to claim 113, wherein the external
wrapper engagement means are located at the means for spreading
open the mouth through which the product is inserted into the
wrapper, in particular when these means are in the spread open
condition.
121. The apparatus according to claim 113, wherein the wrapper
external means operate in conjunction with the means for spreading
open the open mouth of the wrapper and which internally engage the
respective wrapper margin and clamp it against the external
means.
122. The apparatus according to claim 113, wherein the wrapper
external means are in the form of means which are fixed relative to
the internal engagement and/or spreading open means which are
movable in order to apply an action by which the corresponding
wrapper margin is clamped against the external engagement
means.
123. The apparatus according to claim 113, wherein the internal
engagement and/or wrapper spreading open means push and clamp the
respective wrapper margin against the corresponding means for
externally engaging the wrapper.
124. The apparatus according to claim 113, wherein the external
wrapper engagement means extend vertically or perpendicularly.
125. The apparatus according to claim 113, wherein the external
wrapper engagement means have a respective portion for engaging the
corresponding wrapper margin and which is made of an elastic
material, preferably rubber.
126. The apparatus according to claim 113, wherein the external
wrapper engagement means are mounted on the same carrier unit which
is movable, in particular longitudinally movable, and which also
carries the internal engagement and/or spreading open means.
127. The apparatus according to claim 113, wherein the clamping
means are adapted to release the preformed wrapper when the wrapper
is pulled away from them by the action applied to it in particular
by the means for feeding and pushing the product.
128. The apparatus according to claim 113, wherein the means for
clamping the preformed wrapper engage a portion of the preformed
wrapper which can be eliminated, downstream of the zone for closing
the open end, in particular by sealing.
129. The apparatus according to claim 113, wherein the clamping
means, in particular the external means, comprise a first and a
second clamping pad which are spaced from each other, in particular
transversely spaced, especially by an amount such as to allow the
product being inserted into the wrapper to pass through it, and are
preferably adapted to engage opposite side portions of the wrapper
defining the bag.
130. The apparatus according to claim 113, wherein the internal
engagement and/or spreading open means, comprise on each side a
first and a second jaw which are movable together between an inner,
disengaged position and an outer, wrapper engaged position, in
particular where they define means for engaging and clamping the
corresponding margin of the wrapper.
131. The apparatus according to claim 113, wherein the external
wrapper engagement means and the corresponding internal or
spreading open means are mounted on common supporting means,
supported by the base which is movable longitudinally in such a way
that they can be shifted or adjusted transversely.
132. The apparatus according to claim 113, wherein the external
wrapper engagement means comprise means for magnetically attracting
the internal engagement means towards and against the external
means.
Description
TECHNICAL FIELD
[0001] This invention relates to an apparatus for packaging a
product in a respective preformed wrapper or preformed bag.
[0002] Preferably, the packaged product is a product of the tissue
industry, that is, a product made of paper for personal or domestic
use and, preferably, defined by a group of respective articles
which are, in particular, arranged in one or more layers placed on
top of each other, and especially are in the form of packets, in
particular packets of paper face wipes, hand towels or
handkerchiefs, or are in the form of rolls, in particular rolls of
toilet paper or kitchen paper, or are in the form of other
articles.
BACKGROUND ART
[0003] Known in the prior art are apparatuses for packaging a
product in a respective preformed wrapper or bag which has a
respective open end, allowing the product to be inserted into the
wrapper. These apparatuses comprise means for feeding the preformed
wrappers, means for feeding the product and means for inserting the
product into the preformed wrapper through the open end.
[0004] These prior art apparatuses for packaging articles in
respective preformed wrappers do not, however, allow fine quality
packages to be made. Indeed, in these prior art machines, the bag
is held at the bottom by corresponding retaining pins and
corresponding internal jaws which act by friction to open the open
end of the wrapper. Thus, when the product is inserted into the
bag, air may be trapped in the wrapper, causing the respective
retaining means to tear the bag before the product has been fully
inserted into it. As a result, the packages do not have a
particularly neat, attractive finish.
[0005] The industry thus feels the need for apparatuses which allow
obtaining filled bags which create a particularly neat and tidy
effect and which, in particular, do not make excessive folds or
creases on the surface of the bag, especially on or near the bottom
of the bag.
[0006] Another problem with these prior art apparatuses is that the
bag retaining rings by which the bags are held while they are being
handled by the feeding means tend to stick to the bag feeding means
and may require prompt action by personnel, which in turn may
involve shutting down the apparatus.
[0007] Another need felt in the industry is that for apparatuses
whose operation is effective and whose construction costs are
relatively low.
[0008] Another need felt in the industry is that for apparatuses
which minimize the need for personnel for operating and maintenance
purposes and, in particular, which appreciably reduce machine
downtime.
DISCLOSURE OF THE INVENTION
[0009] This invention therefore proposes a new solution as an
alternative to the solutions known up to now and, more
specifically, proposes to overcome one or more of the above
mentioned drawbacks or problems and/or to meet one or more of the
needs felt by the trade and which, in particular, may be inferred
from the above.
[0010] It is accordingly provided an apparatus for packaging a
product in a respective preformed or ready-formed wrapper,
preferably made of a suitable film, such as plastic film, and being
in particular in the form of a bag, the ready-formed or preformed
wrapper having a respective open end, allowing the product to be
inserted into the wrapper and the product being in particular in
the form of a product for personal or domestic use, preferably made
of paper or like material and preferably being in the form of a
group of articles comprising one or more layers placed on top of
each other, and especially are in the form of packets, in
particular packets of face wipes, hand towels or handkerchiefs, or
rolls, in particular rolls of paper, such as rolls of toilet paper
or rolls of kitchen paper, or the like; the apparatus comprises
means for feeding the preformed wrappers, means for feeding the
product and means for inserting the product into the ready-formed
wrapper through the open end and is characterized in that it
comprises means for clamping or gripping the preformed wrapper when
the product is inserted into the preformed wrapper.
[0011] That way, it is possible to hold the preformed wrapper
carefully while it is being filled, thus obtaining packages whose
appearance is improved compared to those obtained by similar
apparatuses known in the prior art.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] This and other innovative aspects or specific advantageous
embodiments of the apparatus are set out in the appended claims and
its technical features and advantages are apparent from the
detailed description which follows of preferred, advantageous
embodiments of it which must, however, be considered purely as
non-limiting examples of the invention, the description being made
with reference to the accompanying drawings, in which:
[0013] FIG. 1 is a perspective view of a first preferred embodiment
of an apparatus according to this invention, showing in particular
the means for filling the preformed wrapper;
[0014] FIGS. 2 to 6 are corresponding perspective views similar to
FIG. 1, showing the different steps by which the product is
inserted into the wrapper by the apparatus of this invention;
[0015] FIGS. 7 to 10 are perspective, front, side and rear views,
respectively, showing the preferred embodiment of clamping means
according to this invention, in a condition preceding the step of
clamping the wrapper;
[0016] FIGS. 11 to 14 are perspective, front, side and rear views,
respectively, showing the preferred embodiment of the clamping
means, in a condition of actually clamping the wrapper;
[0017] FIGS. 15 to 19 are respective perspective views showing the
means and different steps for removing the retaining element which
holds the bags on the feeding means of the first preferred
embodiment of the apparatus according to the invention;
[0018] FIGS. 20A to 20D are respective perspective side and top
views of a second preferred embodiment of the apparatus according
to the invention;
[0019] FIGS. 21A to 21C are respective perspective and longitudinal
cross section views showing the transversely movable conveying
means for making the group of articles in the second embodiment of
the apparatus according to the invention;
[0020] FIGS. 21D to 21F are respective top plan, front and
longitudinal cross section views of the plate for engaging the
sheet or belt of the movable conveying means of FIGS. 21A to 21C
whose purpose is to compensate for dimensional differences of the
articles conveyed;
[0021] FIG. 22 schematically represents the steps by which a group
or layer or articles is made by the transversely movable conveying
means of the second preferred embodiment of the apparatus;
[0022] FIG. 23A is a side view showing the pusher means for pushing
the group of products into the preformed wrapper or bag in the
second preferred embodiment of the apparatus;
[0023] FIGS. 23B and 23C are respective perspective views showing
the engagement member or plate of the pusher of FIG. 23A for
engaging the group of articles, illustrating in particular the
elastic means for engaging and keeping in the spread-apart
condition the walls of the preformed wrapper or bag in the second
preferred embodiment of the apparatus;
[0024] FIG. 23D is a perspective views showing the engagement
member or plate of the pusher for engaging the group of articles,
in a slightly retracted position upstream of the joining and
cutting means for applying the action by which the walls of the
preformed wrapper or bag are engaged and held in the spread-apart
condition;
[0025] FIG. 24A is a perspective view of the end closing means, in
particular for sealing and cutting the respective end of the
preformed wrapper or bag in the second preferred embodiment of the
apparatus according to this invention;
[0026] FIG. 24B is a perspective view showing in particular the
joining and cutting means for trimming the end of the bag and used
in the closing means of FIG. 24A;
[0027] FIGS. 25A to 25E are respective perspective, front top and
side views of the part of the means for spreading apart the walls
or panels of the preformed wrapper or bag in the second preferred
embodiment of the apparatus according to this invention;
[0028] FIG. 25F is a perspective view of the means for engaging and
wiping the filled bag;
[0029] FIG. 26A is a perspective view of the suction means for
extracting the bag trimming and used in the second preferred
embodiment of the apparatus according to this invention;
[0030] FIG. 26B is a perspective view of the suction means for
extracting the trimmed off portion of the bag, shown in the raised
condition where the trimmed off is extracted;
[0031] FIG. 27 is a perspective view of a further embodiment of the
spreading-apart means for keeping in the spread open condition at
least one respective part or panel of the preformed wrapper or
bag;
[0032] FIG. 28 is a perspective view showing the further vacuum
means for creating a vacuum at the suction cup means by which the
preformed wrapper or bag is opened.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION
[0033] FIGS. 1 to 19 illustrate a first preferred embodiment 10 of
an apparatus for packaging a product in a respective preformed
wrapper 11, preferably made of a film, especially a plastic film,
and in particular in the form of a respective preformed or
ready-formed bag for receiving and housing the product.
[0034] As may be inferred from the drawings, the ready-formed
wrapper 11 has a respective open side 111, which allows the product
to be inserted into the wrapper itself by the apparatus of the
invention, and comprises on the opposite, closed side of it 112,
corresponding means for holding the wrapper, in particular in the
form of at least one handle 113 which makes it easier for the full
package to be transported.
[0035] As may be inferred from FIG. 2, the preformed wrapper or bag
comprises respective panels 11a, 11b, 11c, 11d which are adapted to
define corresponding side or peripheral walls of the wrapper itself
and which extend into respective portions for making the bottom
wall of the wrapper or bag after it has been filled with
product.
[0036] The packaged product 13 is in turn made up preferably, but
not exclusively, of a product made of a paper material, that is, in
the form of a product for personal or domestic use or for cleaning
in general. In practice, it is in the form of a product of the
tissue paper industry.
[0037] Preferably, the packaged product is defined by a group of
articles comprising one or more layers of articles placed on top of
one another and which preferably consist of packets 131 of
disposable paper face wipes, hand towels or handkerchiefs but which
might also be in the form of rolls, in particular rolls or toilet
paper or similar articles.
[0038] The preferred embodiment 10 of the apparatus comprises
feeding means, not illustrated in detail in the corresponding
drawings, for feeding the product, in particular along a respective
longitudinal direction of movement, and feeding means for feeding
the ready-formed wrappers 11, in particular along a direction
transverse to the longitudinal direction of movement of the product
until reaching the zone R where the product is inserted into the
wrapper. The two feeding means are illustrated separately in FIGS.
15 to 18.
[0039] Advantageously, the apparatus also comprises means 12 for
inserting the product through the open end 111 and which comprise
the aforementioned means for feeding and longitudinally pushing the
product, a respective embodiment of which is illustrated with
reference to a second preferred embodiment of the apparatus,
described further on.
[0040] Upstream of the aforementioned product feeding and pushing
means, there are means, not illustrated in FIGS. 1 to 19, for
aggregating the products or for forming the group of products
according to the predetermined, desired configuration, which is
variable according to requirements, and a respective preferred
embodiment of which is illustrated with reference to the second
preferred embodiment of the apparatus, described further on.
[0041] Also not illustrated in detail in the drawings and a
respective preferred embodiment of which is nevertheless
illustrated with reference to the second preferred embodiment of
the apparatus, there are provided, downstream of the inserting
means, end closing means for closing the open end of the wrapper
which, after the product has been inserted into the wrapper and the
wrapper with the product inside it has been advanced, downstream of
the end closing means, fold the trailing end of the wrapper around
the rear face of the product, transversely seal the rearwardly
directed part of the wrapper, and lastly, trim an excess strip from
the wrapper itself.
[0042] Once this operation has been carried out, the packaged
product is fed out of the apparatus and the trimmed margin of the
package is conveniently extracted from the apparatus, in particular
by suction.
[0043] Advantageously, the apparatus comprises means 14 for
clamping the preformed wrapper or bag when the product is inserted
into the wrapper or bag.
[0044] That way, it is possible to fill the respective preformed
wrapper or bag reliably and completely even if the product 13 is
substantially the same in area size as the opening through which
the product is inserted into the wrapper or bag, in order to obtain
a wrapper or bag which is neat and tidy, without loose or baggy
side walls.
[0045] In particular, in this advantageous embodiment, the means 14
for clamping the preformed wrapper operate on the wrapper or bag in
the open condition.
[0046] Advantageously, the means 14 for clamping the preformed
wrapper engage the wrapper 11 at the respective open end of it
111.
[0047] In particular, the respective wrapper can be effectively
clamped only when necessary, that is to say, when the product is
being inserted into it and the wrapper must be held firmly and
steadily in place.
[0048] Advantageously, the wrapper clamping means 14 are adapted to
engage opposite, inside and outside faces of a corresponding margin
of the wrapper.
[0049] In particular, advantageously, as may be inferred from the
drawings, the means 14 are adapted to engage opposite, preferably
transversely opposite, faces of opposite margins of the same
wrapper.
[0050] In particular, advantageously, the clamping means 14 are
adapted to engage the respective short side 115, in particular both
short sides, of the wrapper or bag.
[0051] That way, it is not necessary to provide particularly large
clamping means.
[0052] Advantageously, the means 14 for clamping the wrapper 11
comprise wrapper internal means 141.
[0053] The means 14 for clamping the wrapper 11 also advantageously
comprise wrapper external means 142.
[0054] In particular, the internal and external means act in
conjunction to clamp a corresponding wrapper portion or margin.
[0055] That way, the wrapper can be clamped easily and effectively,
without excessive structural and functional complications.
[0056] In particular, advantageously, as may be inferred, the
clamping means are adapted to engage opposite, in particular
transversely opposite, sides of the same wrapper.
[0057] That way, the preformed wrapper or bag 11 can be held in
place particularly effectively so as to allow the product to be
easily inserted to produce a wrapper or bag with a neat and
attractive finish.
[0058] Advantageously, as illustrated, the wrapper clamping means
14 comprise means 141 for spreading open the mouth 111 through
which the product can be inserted into the wrapper itself.
[0059] Thus, it is possible to provide wrapper clamping means which
advantageously perform the further function of spreading open the
mouth through which the product is inserted. This contributes to
creating an apparatus with an advantageously unencumbered
structure.
[0060] In particular, first and second means 141, 141 are provided
for spreading open the mouth 111 through which the product can be
inserted, preferably operating on opposite, especially transversely
opposite, sides of the wrapper.
[0061] Advantageously, the external means 142 of the preformed
wrapper operate in conjunction with the spreading open means 141
which internally engage the respective wrapper and clamp it against
the external means 142.
[0062] The clamping action can thus be obtained by means of basic
and relatively uncomplicated mechanisms, with the advantage of
limiting the production costs of the apparatus
[0063] Advantageously, first and second external wrapper engagement
means 142, 142 are provided, in particular operating on opposite,
especially transversely opposite, sides of the wrapper.
[0064] Advantageously, the external wrapper engagement means 142
are located at the means 141 for spreading open the mouth through
which the product is inserted into the wrapper, in particular when
these means are in the spread open condition.
[0065] In practice, advantageously, the wrapper external means 142
operate in conjunction with the spreading open means 141 which
internally engage the respective wrapper margin and clamp it
against the external means 142.
[0066] The clamping action can thus be obtained by means of a
basic, yet effective, mechanism.
[0067] Advantageously, the wrapper external means 142 are in the
form of means which are fixed relative to the internal engagement
and/or spreading open means 141 which are movable in order to apply
an action by which the corresponding wrapper margin is clamped
against the external engagement means 142.
[0068] In particular, the internal engagement and/or wrapper
spreading open means 141 push and clamp the corresponding wrapper
margin against the respective means 142 for externally engaging the
wrapper.
[0069] Advantageously, the movement of the spreading open means
which spread open the product insertion mouth of the wrapper
defines or coincides with, or at least a final part of it defines
or coincides with, the movement by which the respective wrapper
margin is clamped.
[0070] That way, it is possible to obtain a simple and effective
clamping action.
[0071] As illustrated, the external wrapper engagement means 142
extend vertically or perpendicularly to the respective wrapper.
[0072] It is thus possible to obtain an advantageous configuration
for the means for clamping the preformed wrapper or bag.
[0073] Advantageously, the external wrapper engagement means 142
have a respective portion 142a for engaging the corresponding
wrapper margin and which is made of an elastic material, preferably
rubber.
[0074] This allows an effective retaining action to be applied to
the corresponding margin of the wrapper.
[0075] Advantageously, the external wrapper engagement means 142
are movable, in particular longitudinally movable, together with
the internal engagement and/or spreading open means 141.
[0076] In particular, advantageously, the external wrapper
engagement means 142 are mounted on the same carrier unit 143 which
is movable, in particular longitudinally movable, and which also
carries the internal engagement and/or spreading open means
141.
[0077] This provides a particularly simple, unencumbered structure
for the movable parts of the apparatus.
[0078] Advantageously, these clamping means 14 are adapted to
release the preformed wrapper when the wrapper is pulled away from
them by the action applied to it in particular by the means for
feeding and pushing the product.
[0079] This allows obtaining an effective action for releasing the
wrapper.
[0080] Advantageously, these clamping means 14 engage a portion of
the preformed wrapper 11 which can be eliminated.
[0081] Thus, the outward appearance of the finished package is not
adversely affected in any way and, at the same time, a package with
a well made finish can be obtained.
[0082] In particular, the clamping means 14 engage an end portion,
in proximity to the edge 111 defining the open preformed wrapper
mouth through which the product is inserted.
[0083] In particular, the clamping means 14 engage a portion of the
preformed wrapper which is situated downstream of the zone for
closing the open end 111, in particular by sealing, that is to say,
which is on an end margin of the wrapper which is separated, that
is, trimmed off the wrapper, and then extracted from the working
zone.
[0084] The clamping means, in particular the external means 142,
comprise a first and a second clamping pad 142a, 142a which are
spaced from each other, in particular transversely spaced,
especially by an amount such as to allow the product being inserted
into the wrapper to pass through it.
[0085] The first and second clamping pads 142a, 142a are adapted to
engage opposite side portions of the preformed wrapper or bag
11.
[0086] As illustrated, the internal engagement and/or spreading
open means 141, comprise on each side a first and a second jaw
141a, 141b which move apart, in particular vertically or
perpendicularly to the wrapper.
[0087] In particular, the internal engagement and/or spreading open
means 141, comprise on each side a first and a second jaw 141a,
141b which move apart, in particular with a vertical or
perpendicular component of motion, for example relative to the
wrapper when the wrapper is in a flat condition.
[0088] Advantageously, the internal engagement and/or spreading
open means 141, comprise on each side a first and a second jaw
141a, 141b which are movable, preferably together, between an
inner, disengaged position and an outer, wrapper engaged position,
in particular where they define means for engaging and clamping the
corresponding margin of the wrapper.
[0089] Each jaw 141a, 141b is in the form of an engagement arm,
pivoted at a respective end and adapted to engage the wrapper with
the respective free end.
[0090] In particular, each arm 141a, 141b has an L-shaped
transverse cross section to define corresponding portions for
simultaneously engaging the respective upper, or lower, side margin
at the corner zone of the mouth of the preformed wrapper or
bag.
[0091] Advantageously, the external wrapper engagement means 142
extend for the full perpendicular height which is defined by the
first and second engagement jaws in the spread open condition, that
is to say, in particular, for the full height of the respective
lateral face of the preformed wrapper or bag. That way, the
preformed wrapper or bag can be clamped effectively.
[0092] Further advantageously, although not illustrated in detail
in the accompanying drawings, the external wrapper engagement means
142 have a flat face which, in the gripping condition, engages the
wrapper, and which, in particular, is obtained using an external
engagement pad with a quadrangular cross section.
[0093] That way, a particularly effective retaining action can be
applied to the preformed wrapper or bag.
[0094] In particular, the external wrapper engagement means 142
move to and fro together with the spreading open means.
[0095] Advantageously, the external wrapper engagement means 142
and the corresponding internal or spreading open means 141, which
engage the corresponding side margin of the wrapper are mounted on
common supporting means 144, supported by the base 143 which is
movable longitudinally to and fro.
[0096] The means 144 for supporting the internal and external means
for engaging a respective side of the wrapper are adjustable or
movable transversely to allow quick and easy changing of
configurations when changing over to a different package size.
[0097] The external wrapper engagement means 142 are supported by a
corresponding stem 142c, in particular extending perpendicularly
from a corresponding upper longitudinal bar 145.
[0098] Advantageously, the common supporting means 144 for the
corresponding external wrapper engagement means 142 and the
internal or spreading open means 141 comprise an upright 146 which
supports a respective longitudinal bar 145, the longitudinal bar
145 having, extending downwardly therefrom, the stem 142c, which
supports the external wrapper engagement means 142, and the rotary
stem 141c for articulatedly supporting the internal or spreading
open means 141, or in particular, both the first and second jaws
for spreading open the corresponding side of the wrapper.
[0099] As illustrated, the upright 145 supports respective means
for actuating the internal or spreading open means 141 and
comprising a respective actuator, in particular in the form of a
respective pneumatic cylinder 147 for rotating the jaw mounting
stem and a corresponding element 148 for upwardly rotating the
upper jaw.
[0100] In particular, these clamping means move longitudinally
forwards when the bag opens and then longitudinally backwards when
the bag is pulled away and moved forwards towards the closing or
sealing means by the product pusher.
[0101] Advantageously, although not illustrated in detail in the
accompanying drawings, the external wrapper engagement means might
comprise means for magnetically attracting the internal engagement
means towards and against the external means themselves.
[0102] In another preferred embodiment, not illustrated in the
accompanying drawings, the external wrapper engagement means might
be movable towards and against the internal engagement means using
corresponding actuating means, in particular defined by
corresponding pneumatic actuating means, preferably in the form of
a first and a second pneumatic cylinder, whose respective stem
supports, at its free end, corresponding external engagement
means.
[0103] As illustrated, opening means 22 are provided for opening
the mouth through which the product is inserted, these opening
means being in the form of suction cup means which preferably move
between a lower position, for gripping the corresponding wrapper
margin, and a raised position for inserting the means by which the
mouth is spread open.
[0104] As may be well inferred from FIGS. 15 to 18, means 20 are
provided for retaining the preformed wrapper. That way, a retaining
action can be applied in combination with the clamping means.
[0105] In particular, the retaining means are in the form of
corresponding pin means 20 which are inserted into corresponding
hole means provided on one end 116 of the preformed wrapper, in
particular on a protruding margin of the wrapper, especially on the
open end where the product is inserted into the preformed
wrapper.
[0106] The retaining means 20 are provided between the clamping
means, in particular at the lower position thereof, and are defined
by the feeding means by which the wrapper is advanced towards the
product insertion zone.
[0107] FIGS. 15 to 19 illustrate a preferred embodiment of the
means for feeding the preformed wrapper 11 to the filling zone,
labelled R, where the product is inserted into the wrapper.
[0108] As stated, the means for feeding the preformed wrapper
comprise means 20 for latching to corresponding hole means provided
on the wrapper, in particular on the end of the wrapper and
preferably on a margin 116 protruding from the edge of the wrapper,
which defines the open mouth where the product is inserted.
[0109] Advantageously, as illustrated, the latching means are in
the form of corresponding pin means 20 which protrude
perpendicularly from corresponding movement means 21, in particular
in the form of a corresponding elongate rotating or articulated
endless rotating element, especially in the form of a respective
chain which is moved on corresponding end toothed wheels 211, 212
having a respective positive upper section 213 which runs parallel
to a table for supporting and feeding the wrappers 11.
[0110] The table for supporting the wrappers while they are being
fed is labelled 23 in the accompanying drawings.
[0111] Each latching pin 20 is provided with a corresponding
annular retaining element 22' for keeping the preformed wrapper
latched onto the pin 20.
[0112] The apparatus comprises advantageous and effective means 26
for removing the respective retaining element 22' of the preformed
wrapper movement means, in particular from the respective pin means
20.
[0113] Advantageously, the means 26 for removing the respective
retaining element 22' of the movement means comprise means 261 for
engaging/disengaging the retaining element from the corresponding
pin means 20.
[0114] Advantageously, the means 261 for engaging and disengaging
the retaining element 22' from the corresponding pin means 20 are
adapted to engage the retaining element 22' by the face of it on
the side opposite that from which the corresponding pin means 20
protrude.
[0115] Advantageously, the means 261 for engaging and disengaging
the retaining element 22' from the corresponding pin means 20 are
in the form of fixed means engaged by the corresponding retaining
element 22' as the latter is moved along by the corresponding
movement means 21.
[0116] Advantageously, the means 261 for engaging and disengaging
the retaining element 22' from the corresponding pin means 20
extend along a respective path which moves the retaining element
22' away from the movement means, preferably by causing it to be
pulled off in particular from the corresponding pin means 20.
[0117] Advantageously, the means 261 for engaging and disengaging
the retaining element 22' comprise at least one respective surface
for slidably engaging the retaining element 22', in particular in
the form of a first and a second slidable engagement surface 2611,
2612, well illustrated in FIG. 19, the first and second surfaces
being spaced from each other to allow the corresponding pin means
20 to pass between them.
[0118] As illustrated, advantageous guide means 262 are provided
for channelling the respective retaining element 22' towards the
corresponding collection area, in particular situated laterally or
externally of the apparatus, preferably to allow it to be easily
collected by personnel in charge.
[0119] Advantageously, the guide means 262 are, in particular, in
the form of a respective tubular duct which is downwardly inclined
and made as a single piece with the means 261 for engaging and
disengaging the retaining element 22'.
[0120] In particular, as illustrated, the guide means 262 and/or
the engagement means 261 are inclined downwardly, in particular in
respective opposite angular directions.
[0121] In practice, the engagement/disengagement means 261 are
inclined in an angular direction opposite to that of the guide
means 262.
[0122] Advantageously, as illustrated, the means 26 for removing
the respective retaining element 22' of the preformed wrapper
movement means, in particular for removing the respective pin means
20 are located on the lower, return section of the movement means
21.
[0123] This provides a system which is at once effective, reliable
and convenient for personnel, for removing the wrapper or bag
retaining means from the apparatus.
[0124] FIGS. 20A to 26B illustrate a second preferred embodiment
100 of an apparatus for packaging a product in a respective
ready-formed wrapper 11, preferably made of a plastic film, and in
particular in the form of a respective ready-formed bag for
receiving the product, the apparatus comprising means 12 for
feeding and filling the ready-formed wrapper or bag 11 and means
13' for feeding the preformed or ready-formed wrapper which are
like those of the first preferred embodiment and which are not
described again in detail so as to avoid making this description
too lengthy.
[0125] Although not specifically illustrated in the accompanying
drawings, the second preferred embodiment 100 of the apparatus is
adapted to receive, from the corresponding feeding means, product
or articles in the form of rolls, preferably in the form of rolls
of toilet paper or rolls of kitchen paper, the feeding means
upstream being preferably in the form of a first and a second
conveying channel which are parallel to each other and which are
inserted into the apparatus 100 at the upstream end 9 of the
apparatus, where there are suitable means for receiving the
respective end of the conveying means which feed the product or
articles and which are not, however, illustrated in detail in the
accompanying drawings.
[0126] Advantageously, the apparatus 100 comprises means 16 for
defining the group of articles to be packaged in the preformed
wrapper or bag.
[0127] Advantageously, the means 16 for defining the group of
articles to be packaged in the preformed wrapper or bag comprise
means 30, 30 for forming one or more parallel rows of articles,
where the respective row comprises one or more of the articles.
[0128] Advantageously, as illustrated in particular in FIGS. 21A to
21C, the means 30, 30 for forming one or more longitudinal rows of
articles, where the respective row comprises one or more of the
articles, comprise means for longitudinally feeding one or more
articles to define the corresponding longitudinal row of articles,
these feeding means being transversely movable to define
corresponding parallel rows of articles.
[0129] In particular, as well illustrated in FIG. 21A, the
transversely movable means for feeding the articles comprise a
conveyor, in particular a first and a second conveyor 30, 30, each
having a fixed upstream end 30' for receiving the articles from
corresponding feeding means, and a downstream end 30'' for
releasing the articles, the downstream end 30'' being transversely
movable at respective transverse positions corresponding to
respective rows of articles of the respective group.
[0130] Advantageously, as illustrated in particular in FIG. 21C,
each movable conveyor 30, 30 comprises a first and a second,
longitudinally extending rotary belt for engaging and feeding
opposite sides of each article 11', in particular a lower conveyor
belt 301 and an upper conveyor belt 302 for engaging the lower face
11i and, opposite it, the upper face 11s of each article 11'.
[0131] More specifically, as may be inferred from FIG. 21A, each
conveyor 30 is pivoted on a corresponding vertical pin 300p, at the
respective upstream end 30', and is freely rotatable relative to
the pin 300p, driven by corresponding transverse drive means or
belt 300t, in particular defining a common drive belt for
simultaneously driving the first and second conveyors 30, 30
forwards and backwards, or towards the right or left, this belt
being provided at the free end of each conveyor 30 which it is
suitably connected to. As illustrated, the rotary means or belt is
driven by a corresponding motor 300't. Both of the article feed
belts 301, 302 of each conveyor 30, in particular of both the first
and the second conveyor 30, 30, are driven by a respective common
motor 300'l by means of a corresponding transmission belt labelled
300l in the drawing.
[0132] Advantageously, the rotary belt 301, 302 of the respective
conveyor 30, 30 can be driven forward to advance the articles and,
in particular also backwards to move the articles a little way back
so as to move the article at the front of the articles being
advanced on the conveyor 30, 30 itself to the initial position,
that is, in phase, for the subsequent step of releasing the
articles in the respective position of defining the corresponding
group of articles.
[0133] Advantageously, as may also be inferred from FIGS. 21D to
21F, means 305 are provided for adjusting the spacing between the
opposing engagement and feeding belts 301, 302 as a function of the
corresponding dimension, in particular the height, of the article
to be advanced.
[0134] Advantageously, the means 305 for adjusting the spacing
between the opposing engagement and feeding belts 301, 302 are
provided at the downstream end of the respective conveyor or belt
302 for engaging and feeding the articles.
[0135] In particular, preferably, as illustrated, the spacing
adjustment means 305 allowing for the height of the respective
article are provided on the upper engagement and feeding belt
302.
[0136] Advantageously, the means for adjusting the spacing between
the opposing engagement and feeding belts 301, 302 are in the form
of corresponding means 305 for pushing the respective engagement
and feeding belt 302 against the opposing face of the article, in
particular against the top face of the article 11' itself.
[0137] Advantageously, the means 305 for pushing the respective
belt against the opposing face of the article comprise a respective
plate 3050 for engaging and pushing the respective engagement and
feeding belt 302, this plate acting on the face of the engagement
and feeding belt 302 which is opposite the face which engages the
respective article 11'.
[0138] Advantageously, means 3051 are provided for pushing the
respective plate 3050 which engages the respective engagement and
feeding belt 302, the means 3051 for pushing the respective plate
3050 are in the form of respective elastic means, in particular in
the form of cylindrical helical compression springs, and are
preferably supported by, especially coaxially outside of,
respective supporting stems 3052 for guiding the vertical movement
of the respective engagement plate, the stems being supported by
respective means 3053 for fastening to the supporting structure of
the corresponding conveyor 30.
[0139] Advantageously, means are provided for controlling the first
and second article feeding conveyors 30, 30 which are movable
transversely for forming the one or more parallel rows of articles,
where each row comprises one or more of the articles, as may be
inferred from FIG. 22.
[0140] Advantageously, the means for controlling the first and
second conveyors 30, 30 perform a respective sequence of steps
where both of the transversely movable conveyors for feeding the
articles form the respective configuration of the group or layer of
articles to be packaged, in particular when both of the feed
channels upstream are feeding articles.
[0141] In particular, as illustrated, the means for controlling the
first and second conveyors 30, 30 perform a respective sequence of
steps where each conveyor 30, 30 fills, or provides, a respective
end, or lateral, row of articles and both provide, preferably in
sequence, a respective central row of articles, as may be inferred
from steps 1 and 2 of the sequence illustrated in FIG. 22, showing
a group of six rolls in two rows being formed by a twin feed
system.
[0142] Advantageously, the means for controlling the first and
second conveyors 30, 30 perform a respective sequence of steps
where only one of the transversely movable conveyors 30, 30 for
feeding the articles forms the respective configuration of the
group or layer of articles to be packaged, in particular when only
one of the feed channels upstream is feeding articles.
[0143] In particular, as illustrated, the means for controlling the
first and second conveyors 30, 30 perform a respective sequence of
steps where a single conveyor 30, 30 fills, or provides, in
sequence, the longitudinal rows, or a respective longitudinal row,
of articles of the respective group or layer, as may be inferred
from steps 1, 2 and 3 of the sequences illustrated in FIG. 22,
showing a group of six rolls in two rows being formed by a
left-hand single feed system and a right-hand single feed
system.
[0144] Further, as illustrated in FIGS. 20A to 20D, the means 16
for forming the group of articles to be packaged in the
ready-formed wrapper or bag comprise, immediately downstream of the
means 30 for forming one or more parallel rows of articles, means
32 for spacing and feeding the respective group or layer of
articles, in particular in the form of respective crossbar means
320, especially comprising one or more rotary crossbars which
follow a closed path having an upper feed section where the
respective crossbar engages the back of and feeds the respective
group or layer of articles which is supported at the bottom by a
respective fixed flat surface 321, the means 32 preferably defining
means for separating the part of the packaging apparatus situated
upstream of the crossbar means 32 themselves from the part of the
packaging apparatus situated downstream of the crossbar means 32
themselves.
[0145] In particular, as illustrated, downstream of the spacing and
feeding means 32, the means 16 for forming the group of articles to
be packaged in the ready-formed wrapper or bag comprise means 34
for stacking the respective layers of articles to form a
corresponding group of articles to be packaged having more than one
layer.
[0146] In particular, as illustrated, downstream of the spacing and
feeding means 32, and in particular downstream of the stacking
means 34, the means 16 for forming the group of articles to be
packaged in the ready-formed wrapper or bag comprise means 36 for
laterally compressing the respective group or layer of articles, if
necessary.
[0147] Advantageously, as illustrated in FIGS. 23A and 23B, means
40 are provided for longitudinally feeding and pushing the product
or respective group of articles, and which are adapted to insert
the product or respective group of articles into a corresponding
preformed wrapper or bag in the open condition and/or to feed the
ready-formed wrapper or bag with the product inside it to and, in
particular, downstream of, the end closing means.
[0148] In particular, as illustrated, the means 40 for
longitudinally feeding and pushing the product or respective group
of articles into a corresponding preformed wrapper or bag and/or
for feeding the ready-formed wrapper or bag with the product inside
it to and, in particular, downstream of, the end closing means,
comprise a respective pusher element, in particular a first and a
second pusher element 401, 401, each movable longitudinally and
adapted to engage the back of the product or group of articles at a
respective withdrawn pickup position in such way as to feed and
insert it into a respective preformed wrapper or bag in the open
condition at a respective advanced insertion position and/or to
then feed them together to the end closing means.
[0149] In particular, as illustrated, each pusher element 401, 401,
comprises a respective member 402, 402 for engaging the back of the
product or group of articles, the engagement member being mounted
on a respective arm 403, 403 which is movable between a lowered
position for engaging the product or group of articles and a raised
position for returning the respective pusher and which is moved by
a corresponding longitudinal drive belt 404.
[0150] Advantageously, as illustrated, each pusher element 401, 401
comprises a respective member 402, 402 for engaging the back of the
product or group of articles and which, in particular, has a
peripheral profile defined by respective upper and lower edges
402s, 402i, in particular horizontal and parallel to each other,
and opposite lateral flanks, each defined by corresponding oblique
edges 402l, 402l extending respectively from the upper and lower
edges 402s, 402i and converging towards the central part of the
engagement member until meeting at a respective joining point.
[0151] As may be inferred from FIG. 24A, downstream of the zone
where the product or group of articles is inserted into the
preformed wrapper or bag, advantageous means 42 are provided for
closing the open end of the preformed wrapper or bag.
[0152] In particular, as illustrated in FIG. 24A, the means 42 for
closing the open end of the preformed wrapper or bag comprise
respective crossbars 421, 421 for joining, in particular sealing,
and/or cutting the end of the preformed wrapper or bag, and which
are movable between a perpendicularly spaced-apart position
allowing the passage of the wrapper and the product contained
therein and a perpendicularly close-together position for joining
and/or cutting the end of the preformed wrapper or bag.
[0153] In particular, as illustrated, each movable crossbar 421,
421 comprises a respective transverse joining surface 422, in
particular for sealing the end of the preformed wrapper or bag,
and/or a corresponding transverse blade 423 for cutting the end of
the preformed wrapper or bag.
[0154] In particular, as illustrated, the means 42 for closing the
open end of the preformed wrapper or bag comprise respective means
for forming respective concertinas at the bottom of the preformed
wrapper or bag containing the product and which are defined by
respective shaped plates, in particular triangular tipped plates,
424, 424 which are movable, in particular transversely, between a
spaced-apart position allowing the passage of the wrapper and the
product contained therein and a close-together position for forming
corresponding lateral concertinas at the end of the preformed
wrapper or bag.
[0155] Advantageously, spreading-apart means are provided for
keeping in the spread open condition at least one respective part
or panel of the preformed wrapper or bag, in particular before
closing the end of the preformed wrapper or bag.
[0156] Advantageously, as may be inferred from FIGS. 23B to 23D,
the spreading-apart means for keeping in the spread open condition
at least one respective part or panel of the preformed wrapper or
bag comprise means 41 for engaging and keeping in the spread open
or outwardly widened condition the panels 11a, 11b, 11c, 11d
defining the side walls of the preformed wrapper or bag and, in
particular, acting at, or in the vicinity of, the open end of the
wrapper or bag.
[0157] Advantageously, the means 41 for engaging and keeping in the
spread open condition the panels 11a, 11b, 11c, 11d defining the
side walls of the preformed wrapper or bag are adapted to engage
the corresponding inside surface of the preformed wrapper or
bag.
[0158] Advantageously, the means 41 for engaging and keeping in the
spread open condition the panels 11a, 11b, 11c, 11d defining the
side walls of the preformed wrapper or bag are adapted to engage
the inside faces of the panels defining the side walls of the
preformed wrapper or bag, in particular at the edge between
adjacent panels 11a, 11b, 11c, 11d of the side walls of the
preformed wrapper or bag.
[0159] Advantageously, the means 41 for engaging and keeping in the
spread open condition the panels 11a, 11b, 11c, 11d defining the
side walls of the preformed wrapper or bag are in the form of
elongate stem means having a respective free end 411, in particular
rounded, for engaging the preformed wrapper or bag.
[0160] Advantageously, the stem means for engaging and keeping in
the spread open condition the panels 11a, 11b, 11c, 11d comprise a
plurality of stems 41, in particular four elongate stems,
especially for engaging a corresponding inside edge of the
preformed wrapper or bag.
[0161] In particular, as illustrated, each stem 41 extends
obliquely, especially to engage a corresponding inside edge of the
preformed wrapper or bag.
[0162] Advantageously, the means for engaging and keeping in the
spread open condition the panels 11a, 11b, 11c, 11d defining the
side walls of the preformed wrapper or bag are in the form of
elastically compliant means, in particular elastically compliant in
a respective plane which is transverse to the direction of
extension and/or of engagement against the preformed wrapper or
bag, that is to say, preferably elastically compliant in a
direction transverse to the longitudinal axis L of the respective
stem 41.
[0163] Advantageously, each stem for keeping in the spread open
condition is in the form of a corresponding cylindrical helical
spring, in particular in the form of a traction spring which
supports a respective tip 411, preferably metallic with a rounded
outside face, for engaging the preformed wrapper or bag.
[0164] In a different embodiment, illustrated in FIG. 27, the
respective stem 41', with a respective rounded tip 411', which is
in particular in the form of a flexible stem 41', is suitably made
of polyurethane or other polymeric material.
[0165] Advantageously, the means, or respective stem 41, for
engaging and keeping in the spread open condition the preformed
wrapper or bag are supported, or is supported, by the respective
pusher element 401 for pushing the product or group of articles, in
particular by the respective member 402 for engaging the product or
group of articles.
[0166] Advantageously, the means, or respective stem 41, for
engaging and keeping in the spread open condition, protrude, or
protrudes, outwards from the respective edge, in particular the
upper edge 402s, the lower edge 402i and/or the lateral edge 402l,
of the member 402 of the respective pusher element 401 for engaging
the product or group of articles.
[0167] Advantageously, the means, or respective stem 41, for
engaging and keeping in the spread open condition the panels 11a,
11b, 11c, 11d, in particular the respective stem, are or is
integral with the respective lateral edge, in particular the
oblique edge 402i of the member 402 of the respective pusher
element 401 for engaging the product or group of articles.
[0168] Advantageously, the respective pusher element 401, in
particular, the member 402 for engaging the product or group of
articles thereof, after having inserted the product or group of
articles into the respective preformed wrapper or bag and having
brought it to the position for closing the end of the preformed
wrapper or bag, longitudinally beyond, or downstream of, the
corresponding closing means 42, withdraws to a position upstream of
the end closing means 42 for keeping the panels 11a, 11b, 11c, 11d
defining the walls of the preformed wrapper or bag in the spread
open condition, and advantageously keeps the bag open and the
panels 11a, 11b, 11c, 11d in the wide-open condition, as shown in
FIG. 23D.
[0169] That way, it is possible to keep the open end of the wrapper
in the spread open condition just before the end of the wrapper or
bag is closed and a portion of it trimmed off.
[0170] In particular, the elastically compliant means or stems 41
make it possible to not damage the wrapper or bag when the
respective engagement member of the pusher enters the wrapper or
bag, taking the product or group of articles along with it, and/or
do not interfere in unwanted manner with other components of the
apparatus during the longitudinal stroke of the respective pusher
401, thus avoiding the risk of also damaging corresponding
components of the apparatus.
[0171] Advantageously, the spreading-apart means for keeping in the
spread open condition the preformed wrapper or bag comprise means
44 for engaging and wiping the respective surface or face of the
preformed wrapper or bag, in particular the respective panel 11a,
11b, 11c, 11d defining the corresponding side or peripheral wall of
the preformed wrapper or bag 11.
[0172] Advantageously, as may be inferred in particular from FIGS.
25A to 25F, the means 44 for engaging and wiping the respective
surface or face of the preformed wrapper or bag, in particular the
respective panel defining the corresponding side or peripheral wall
of the preformed wrapper or bag 11 are provided downstream, in
particular immediately downstream, of the end closing means 42.
[0173] Advantageously, the means for engaging and wiping the
respective surface or face of the preformed wrapper or bag comprise
corresponding brush means 441, in particular engaging and wiping
the upper surface or panel 11a of the preformed wrapper or bag with
the product or group of articles inside it.
[0174] Advantageously, the brush means 441 extend transversely to
the longitudinal feeding direction of the product or group of
articles packaged inside the preformed wrapper or bag.
[0175] Advantageously, the brush means 441 comprise respective
perpendicular bristles whose free ends 441' engage and wipe the
respective opposing surface or face of the preformed wrapper or
bag.
[0176] In particular, as illustrated, the brush means 441 are
provided above the zone where the preformed wrapper or bag, with
the product or group of articles inside it, passes and at a
position such as to engage and wipe the respective opposing surface
or face of the preformed wrapper or bag.
[0177] Advantageously, the means 44 for engaging and wiping the
respective surface or face of the preformed wrapper or bag, in
particular the respective panel defining the corresponding side or
peripheral wall of the preformed wrapper or bag 11 are defined by
the flat surface 442 which supports the underside of the preformed
wrapper or bag, with the product or article inside it, the flat
surface 442 engaging and wiping the underside surface 11i of the
preformed wrapper or bag.
[0178] Advantageously, the flat surface which supports the
underside of the preformed wrapper or bag, with the product or
article inside it, has a fixed portion 442 and a movable end
portion 442' which extends between the edge upstream of the fixed
portion 442 and the opposing end closing means 42 and which is
adapted to withdraw to allow inserting the suction means 48,
illustrated in FIG. 26A, for extracting the portion trimmed
off.
[0179] Advantageously, the means 44 for engaging and wiping the
respective surface or face of the preformed wrapper or bag, in
particular the respective panel defining the corresponding side or
peripheral wall of the preformed wrapper or bag 11, are also
defined by opposed longitudinal side walls 443, 444 for engaging
and wiping the opposite lateral surfaces 11c, 11d of the preformed
wrapper or bag.
[0180] Advantageously, the means 44 for engaging and wiping the
respective surface or face of the preformed wrapper or bag, in
particular the respective panel defining the corresponding closed
end wall of the preformed wrapper or bag 11 are located on the end
closing means 42, in particular on the respective crossbar 421 for
joining and/or cutting a corresponding portion of the preformed
wrapper or bag to be trimmed off, in particular on the face 45' of
the crossbar facing downstream and which engages a corresponding
rear surface or face of the preformed wrapper or bag with the
product or group of articles inside it.
[0181] Advantageously, the means 44 for engaging and wiping the
respective surface or face of the preformed wrapper or bag, in
particular the respective panel defining the corresponding closed
end wall of the preformed wrapper or bag 11 and which are located
on the end closing means 42, comprise a respective oversize
friction surface, in particular in the form of a respective
rubberized surface 45' on the self-same crossbar 421 for joining
and/or cutting the end portion of the wrapper.
[0182] Advantageously, the spreading-apart means for keeping in the
spread open condition at least one respective part or panel of the
preformed wrapper or bag comprise means 46 for engaging and keeping
in the spread open condition a respective lateral portion, in
particular a bottom end portion, of the respective panel 11c, 11d
defining the corresponding side wall of the preformed wrapper or
bag.
[0183] Advantageously, the means for engaging and keeping in the
spread open condition a respective lateral portion, in particular a
bottom end portion, of the respective panel 11c, 11d defining the
corresponding side wall of the preformed wrapper or bag comprise
respective means 46 for gripping the corresponding outside surface
of the preformed wrapper or bag.
[0184] Advantageously, the means for gripping the corresponding
outside surface of the preformed wrapper or bag are in the form of
respective suction cup means 46.
[0185] In particular, as illustrated, the gripping means, or
suction cup means, comprise, for each side, a first and a second
suction part, or cup, 46, 46, perpendicularly spaced from each
other and preferably operating in the vicinity of the respective
upper and lower edge or panel 11a, 11b of the preformed wrapper or
bag.
[0186] Advantageously, the means 46 for gripping the corresponding
outside surface of the preformed wrapper or bag are movable between
a transversely close-together position for gripping and keeping in
the spread open condition the respective lateral or bottom end
portion of the preformed wrapper or bag and a transversely
spaced-apart position allowing the preformed wrapper or bag in the
filled condition to pass through.
[0187] Advantageously, the means 46 for gripping the corresponding
outside surface of the preformed wrapper or bag are movable
together with a movable part 443', 444' of the longitudinal wiping
side wall 443, 444 of the preformed wrapper or bag in the filled
condition, the gripping means 46 being mounted on the movable part
443', 444', the movable part 443', 444' being located upstream of,
and in particular pivoted to, the respective fixed portion of the
corresponding longitudinal wiping side wall 443, 444 of the
preformed wrapper or bag in the filled condition.
[0188] In particular, as illustrated in FIG. 26A and as mentioned
above, suction means 48 are provided for extracting and rejecting
the trimmed off portion of the preformed wrapper or bag in the
closed condition.
[0189] Advantageously, as may be inferred from FIG. 26B, the
suction means for extracting and rejecting the trimmed off portion
of the preformed wrapper or bag in the closed condition comprise a
suction pipe 48 for extracting the trimmed off portion at the zone
48' for closing the end of the preformed wrapper or bag, the
suction pipe being movable to the extraction position, in
particular to the raised position, independently and after the end
of the preformed wrapper or bag has been closed.
[0190] In a further embodiment, illustrated in FIG. 28, means 22,
22 are provided for opening the open mouth for inserting the
product into the ready-formed wrapper and which, as in the first
preferred embodiment, are in the form of a first and a second
suction cup 22, 22 mounted on respective arms which extend above
the wrapper from opposite sides relative to the preformed wrapper
itself, that is, relative to the zone the wrapper is placed in, and
which preferably move between a lower position, for gripping the
corresponding wrapper margin, and a raised position for inserting
the means by which the mouth is spread open, the first and second
suction sups 22, 22 being advantageously connected to a single
vacuum generator 221.
[0191] In particular, as illustrated, the single vacuum generator
221 is connected by means of a duct 220 to a flow dividing valve
222 which transmits the suction by way of corresponding ducts 223,
224 to the first and second suction cups 22, 22 for opening the
bag.
[0192] Thus provided is an apparatus which allows obtaining
packages with a neat and attractive finish and more appealing to
consumers of the packaged products.
[0193] Moreover, the apparatus uses a reduced number of motor
drives, with obvious advantages in terms of the construction and
running costs of the apparatus.
[0194] The invention described is susceptible of industrial
application. It would be obvious to one skilled in the art that
several changes and modifications can be made to the invention
without departing from the spirit and scope of the invention,
described in depth above. Also, further preferred embodiments of
the invention comprising one or more of the features described
herein can easily be imagined. It will also be understood that all
the details of the invention may be replaced by technically
equivalent elements.
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