U.S. patent application number 10/617438 was filed with the patent office on 2004-01-15 for flexible bag for use in manufacturing.
This patent application is currently assigned to Baxter International Inc.. Invention is credited to Danby, Hal C..
Application Number | 20040007588 10/617438 |
Document ID | / |
Family ID | 25427208 |
Filed Date | 2004-01-15 |
United States Patent
Application |
20040007588 |
Kind Code |
A1 |
Danby, Hal C. |
January 15, 2004 |
Flexible bag for use in manufacturing
Abstract
A flexible bag for use in a method for manufacturing in which a
fluent material is dispensed to an article such as a container from
a flexible bag. The fluent material is dispensed directly to the
container without any intervening structure which contacts the
fluent material. Accordingly, the manufacturing apparatus can be
constructed of less expensive materials and does not require
frequent cleaning. The apparatus acts on the bag to dispense and
does not act on the fluent material. Thus, the apparatus has
particular application where aseptic conditions need to be
maintained such as in the packaging of the food and medicine. The
flexible bag is preferably formed with multiple outlets permitting
simultaneous dispensing to multiple containers.
Inventors: |
Danby, Hal C.; (Nr. Sudbury,
GB) |
Correspondence
Address: |
Francis C. Kowalik
Baxter Healthcare Corporation
One Baxter Parkway, 32E
Deerfield
IL
60015-4633
US
|
Assignee: |
Baxter International Inc.
|
Family ID: |
25427208 |
Appl. No.: |
10/617438 |
Filed: |
July 11, 2003 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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10617438 |
Jul 11, 2003 |
|
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09909422 |
Jul 19, 2001 |
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Current U.S.
Class: |
222/94 |
Current CPC
Class: |
A21B 7/00 20130101; B65B
61/065 20130101; B65B 9/042 20130101; B65B 37/20 20130101 |
Class at
Publication: |
222/94 |
International
Class: |
B65D 035/22 |
Claims
What is claimed is:
1. A flexible bag for use in dispensing a fluent material, the bag
being formed of flexible material and shaped for substantially
enclosing a volume for containing the fluent material, the bag
comprising a body and plural nipples, each nipple being integral
with the body and projecting outwardly from the body, the body and
nipples being in fluid communication for movement of the fluent
material from the body to the nipples.
2. A flexible bag as set forth in claim 1 wherein the nipples are
formed of the flexible material as one piece with the body.
3. A flexible bag as set forth in claim 2 wherein each nipple has a
generally elongate, tubular shape.
4. A flexible bag as set forth in claim 3 wherein each nipple has
an outlet therein for passage of fluent material out of the
bag.
5. A flexible bag as set forth in claim 1 further comprising a
hanger for hanging the bag.
6. A flexible bag as set forth in claim 5 wherein the hanger is
formed integrally with the bag.
7. A flexible bag as set forth in claim 5 wherein the hanger is
located on a side of the body opposite the nipples.
8. A flexible bag as set forth in claim 1 in combination with
apparatus for dispensing fluent material from the bag, the
apparatus comprising a flow control adapted to deform the bag for
forcing material from the bag.
9. The combination as set forth in claim 8 wherein the flow control
is adapted to receive plural portions of the bag, the flow control
being adapted to separately deform the bag portions for dispensing
fluent material to plural articles and the same time.
10. The combination as set forth in claim 9 wherein the apparatus
further comprises a bag squeezing device for moving fluent material
in the bag generally toward the flow control.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a division of U.S. application Ser. No.
09/909,422, filed Jul. 19, 2001.
BACKGROUND OF THE INVENTION
[0002] This invention relates generally to manufacturing processes
and equipment, and more particularly to manufacturing of products
employing a flexible bag for dispensing a fluent material to
articles.
[0003] Many manufacturing processes and apparatus have as a
component element the dispensing of a fluent material to an
article. As one example, packaging machinery which fills a
container and seals or closes the container is widely employed to
package a variety of products. For certain applications, the same
machines also make the container. So called form, fill and seal
machines typically form a bag from a web of flexible material and
pass the bag directly to a filling station where the product is fed
by gravity otherwise moved into the bag through an opening in the
bag. The same machine then seals the bag opening to enclose the
product. The bag may also be itself placed inside another container
such as a cardboard box.
[0004] Food and medicinal products are commonly packaged in the way
and by the type of machine described above. These products are of
the type which can flow under the force of gravity, or when pushed
by a pump, auger or other suitable device. Of course, liquid
materials can be packaged in this manner, but often the product is
a solid (e.g., potato chips, cereal or pills) which is sufficiently
granular to flow. Naturally, food and medicinal products must be
handled by the machine in such a way as to maintain aseptic
conditions. Accordingly, the parts of the machine which handle the
food are made of materials (e.g., stainless steel) which are highly
resistant to corrosion and can be cleaned. However, such materials
are expensive and significantly increase the cost of the machine.
The machines must be periodically shut down to clean surfaces which
handle the food product and the bags. Many food products are prone
to leave crumbs, residue or other debris as they are handled, which
cause the machinery to become unsanitary. Although necessary, it is
inefficient to stop the machine frequently for cleaning and this
increases the cost of packaging the product.
SUMMARY OF THE INVENTION
[0005] In one aspect of the present invention, a flexible bag for
use in dispensing a fluent material encloses a volume for
containing the fluent material. The bag comprising a body and
plural nipples, erach nipple being integral with the body and
projecting outwardly from the body, the body and nipples being in
fluid communication for movement of the fluent material from the
body to the nipples.
[0006] Other objects and features of the present invention will be
in part apparent and in part pointed out hereinafter.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG. 1 is a schematic perspective view of apparatus for
automatically filling containers using a flexible bag of the
present invention;
[0008] FIG. 2A is a diagrammatic flow of the apparatus illustrating
its operation in a forward feed mode;
[0009] FIG. 2B is a diagrammatic flow of the apparatus illustrating
its operation in a fill, seal and separate mode;
[0010] FIG. 3 is an elevation of a flexible bag of the present
invention with parts broken away to show the integral connection of
nipples to the bag;
[0011] FIG. 4 is an enlarged perspective of the apparatus showing a
pump thereof without the bag and open in preparation for receiving
the bag nipples;
[0012] FIG. 5 is a enlarged, fragmentary elevation taken from the
vantage indicated by line 5-5 of FIG. 1 with parts broken away to
illustrate the reception of nipples in the pump;
[0013] FIG. 6 is a fragmentary, schematic elevation similar to FIG.
5 but showing another pump capable of delivering fluent material at
different rates or in different amounts from the different
nipples;
[0014] FIG. 7 is an enlarged, fragmentary view of apparatus similar
to that shown in FIG. 1 but including a bag squeezing mechanism to
force fluent material toward the nipples and pump; and
[0015] FIG. 8 is a fragmentary view of the flexible bag showing one
of the nipples receiving a needle in its outlet.
[0016] Corresponding reference characters indicate corresponding
parts throughout the several views of the drawings.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0017] Referring now to the drawings and in particular to FIG. 1,
apparatus for forming containers 10, filling the containers with a
fluent material F and sealing the containers is indicated generally
at 12. The apparatus includes a support 14 which suspends a
flexible bag (or "reservoir") 16 holding the fluent material F, and
mounts a pump 18 (the reference numerals designating their subjects
generally). The fluent material F may be a food or medicinal
product, but is not limited to materials consumed or otherwise used
on or in the body. Moreover, the material may be of such a nature
that it is fluent only at the time it is delivered from the bag 16.
The present invention is particularly adapted for use to maintain
an aseptic environment for the fluent material F, but has
application where it is not necessary that such an environment be
maintained. Although the substance is preferably a liquid or
semi-liquid, solids which are sufficiently granular to flow may
also be held in the flexible bag 16. As one example of the type of
product packaged, the fluent material F could be honey to be
packaged in small, disposable containers 10 such as for single
serving use by customers of a restaurant.
[0018] A conveyor of the apparatus 12 is generally indicated at 19
and includes in the illustrated embodiment a first feed roller 20
holding a roll of material to form containers 10 extending forward
from the first feed roller in a web 22, and a take-up roller 24
which receives a remnant of the web. A first guide roller 26 is
provided to locate the web 22 in a horizontal position while
permitting the web to change direction to reach the take-up roller
24. A belt conveyor 28 located under the web 22 at the downstream
end of the web receives sealed containers 10 which are separated
from the web, and conveys them for tumble packaging in a box B. It
is to be understood that the illustration of the conveyor 19 is
schematic as the details of construction are well known to those of
ordinary skill in the art in the field of such apparatus. Moreover,
although the conveyor 19 is illustrated to include rollers 20, 24
which let out and take up the web 22 of material from which the
containers 10 are formed, other conveyors are envisioned. For
instance, a belt or other moving surface or support (not shown)
which receives pre-formed containers could be used without
departing from the scope of the present invention. In that
instance, the first feed roller 20 and belt conveyor 28 would not
be present.
[0019] Further, it is envisioned that a conveyor for establishing
relative motion between the containers 10 and the flexible bag 16
could include not only the conveyor 19, but also structure for
moving the bag while the containers are stationary, or structure
which produces some combination of movement of the bag and movement
of the containers. In any event if the bag 16 is the frame of
reference, the containers 10 will move past the bag. Still further,
it is not necessary that the fluent material F be used to fill
containers of any type. Indeed the fluent material can be applied
to the exterior of an article (or "receiving member"), such as the
application of icing to a manufactured food product, which does not
"contain" the fluent material. The fluent material could also be
injected into the article.
[0020] In the illustrated embodiment, containers 10 are formed from
the web 22 by a die 32 and a form (not shown) which come together
just upstream from the first feed roller 20 to deform the web into
rectangular, flat-bottomed depressions constituting the containers.
The die 32 contains recesses 34 having shapes substantially the
same as that of the containers 10 to be formed. The form, which
would be located above the web 22, has not been shown so as not to
obstruct the view of the flexible bag 16. The shape of the end of
the form is the reverse of the recess so that the form may fit into
the recess, forming the web 22 between them. The form and die 32
create one laterally extending row of containers 10 from the web 22
on a single stroke. In the illustrated embodiment, the rows
constitute an array of containers 10. However as used herein, an
array can refer to a single file line of containers or only a
single container placed under the bag 16 for filling. As shown, the
containers 10 are formed by stretching the web 22 without
substantially affecting the lateral dimension or shape of the web.
However, some dimensional variation can be tolerated if the
containers 10 retain their relative arrangement. Once formed, the
containers 10 retain their shape, but remain part of the web 22 and
move with the web.
[0021] The web 22 passes forwardly from the form and die 32 under
the flexible bag 16 held by the support 14. The bag 16 is made of a
flexible material (which as used herein would include a limp
material), which can be formed in a sterile environment or formed
and filled in a non-sterile environment and then subject to a
sterilizing process. However as mentioned above, the bag 16 could
also be used for products not requiring an aseptic conditions. Any
suitable material could be used to form the bag 16, such as an
appropriate polymer, including without limitation polyvinyl
chloride, polyolefin, polymer laminates and polymer alloys. As
shown, the bag 16 is transparent so that the flowable product
carried by the bag can be readily seen to determine if the bag is
empty. However, other ways (not illustrated) of establishing
whether the bag 16 is nearing empty can be employed, such as
electronic eyes which view the level of fluent material F, and
devices to weigh the bag.
[0022] Referring to FIG. 3, the bag 16 comprises a thin-walled body
38 which encloses a volume containing the large majority of the
fluent material F. At the upper end of the body 38, two laterally
elongate loops 40, together constituting in the illustrated
embodiment "a hanger", are formed as one piece with the remainder
of the bag 16. The loops 40 can be also formed separately from the
bag 16 and attached to the body 38 in a suitable manner such as by
welding, adhesive or with a mechanical fastener(s). The loops 40
receive a mounting rod 42 of the support 14 which extends laterally
of the bag and holds the bag on the support. The ends of the rod 42
are received in upwardly opening, U-shaped receptacles 44 at the
upper ends of uprights 45 of the support 14. The receptacles 44
hold the rod 42 and the bag 16, but permit the bag to be removed
from the support 14 and replaced, by lifting the rod out of the
receptacles, sliding the loops 40 off of the rod and sliding a new
bag (not shown) onto the rod. The rod 42 supporting the new bag can
then be replaced with its ends in the U-shaped receptacles 44 for
continued operation. Of course other ways of supporting the bag 16
may be employed without departing from the scope of the present
invention. Preferably, the bag 16 is supported so that it can be
readily removed and replaced. It is envisioned that structure, such
as a second support and pump (not shown), could be used so that
bags could be changed out without any interruption in operation of
the apparatus 12.
[0023] At the lower end of the body 38, four nipples 46 extending
down from the body are in fluid communication with the interior of
the bag 16 for delivery of the fluent material F out of the bag and
into the containers 10, as will be described more fully
hereinafter. The number of nipples 46 is preferably the same as the
number of containers 10 formed in each row. Naturally, the number
of nipples and their precise arrangement can be varied as necessary
for the particular manufacturing operation. The nipples 46 are
generally elongate tubes which are integral with the body 38. The
nipples 46 may be formed separately from the body 38 and attached
in a suitable manner, such as by welding, adhesive or mechanical
fastener(s) to achieve integration with the bag material which
forms the body. However in the preferred embodiment, the nipples 46
are formed of the same piece of material as the body 38 of the bag
16. As initially formed, the lower ends of the nipples 46 are
closed (as shown in FIG. 3) to seal the interior of the bag 16 to
hold the fluent material F in the bag. In manufacturing operation,
the ends are cut or otherwise made to have outlets to allow the
fluent material F to flow out of the bag 16. Preferably, the
nipples 46 are tubular with no internal structure. However, it is
envisioned that the nipples could be equipped with internal valves
or re-expansion devices (not shown) without departing from the
scope of the present invention.
[0024] The bag 16 can be formed in any suitable fashion. A typical
way of forming the bag 16 is to provide two webs of material which
are brought together and cut to shape by a die (not shown) to form
an enclosure. At the same time the webs are cut to shape, adjacent
the peripheral edges of the bag are welded together in the die,
such as by a solvent or RF welding. The adjacent edges could also
be heat sealed, for example. As one alternative, a single web of
polymeric material could be folded over against itself to form the
enclosure. The folded web could be cut and sealed in a similar way
as for the bag formed from two webs. Adjacent peripheral edges may
be left unattached along a portion of the bag 16 to provide an
opening for filling the bag with fluent material.
[0025] The nipples 46 are received through the pump 18 which acts
on the nipples as by deforming the nipples to produce a metered
flow of the fluent material F out of the bag 16. The pump 18 is
mounted on the support 14 which also holds the bag 16 and extends
transversely over the web 22. The pump 18 illustrated in FIGS. 1, 4
and 5 is a shuttle pump, which includes a shuttle 50 and an anvil
52. The shuttle is mounted on a stationary crosspiece 54 for
sliding movement relative to the crosspiece and anvil 52 in a
direction transverse to the web 22. A housing 56 at the left end of
the crosspiece 54 encloses a shuttle actuation mechanism (not
shown). A door 58 hingedly attached to the crosspiece 54 carries
the anvil 52. The door can be opened as shown in FIG. 4 to
facilitate reception of the nipples 46 in the pump 18, and locked
with a latch 60 in a closed position for operation, as will be more
fully described. Referring to FIG. 4, both the shuttle 50 and the
anvil 52 are shaped to have five flat plateaus (50A, 52A) separated
by four valleys (50B, 52B). Except when the pump 18 is actuated to
deliver fluent material F, the plateaus 50A, 52A and valleys 50B,
52B of the shuttle 50 and the anvil 52 are in substantial
registration when the door 58 is closed. The nipples 46 are
received in the aligned valleys 50B, 52B such that each nipple is
surrounded by the shuttle 50 and anvil 52. In the illustrated
embodiments, the nipples 46 are the portions or regions of the bag
16 which are received in or acted upon by the pump 18. Two of the
nipples 46 are illustrated in FIG. 5 as received in the valleys
50B, 52B, but only the valleys 50B may be seen because the door 58
and anvil 52 have been broken away. The crosspiece 54 is further
formed with upper and lower aligned slots 62 which are vertically
aligned with the valleys of the anvil 52. The nipples 46 pass
through these slots 62 upon entering and exiting the pump 18. An
upper pincher 64 and a lower pincher 66 located on one side of each
slot 62 are mounted for extension and retraction from the
crosspiece 54 across the slot (i.e., transverse to the web 22). The
pinchers 64, 66 extend to pinch the nipples off, closing the
nipples from fluid flow past the points where the nipples are
pinched. The pinchers 64, 66 are separately actuated from the
shuttle 50 and the upper pinchers are separately actuated from the
lower pinchers, as will be described more fully hereinafter, to
facilitate accurate dispensing of the fluent material F. A pump of
the same general type is disclosed in U.S. Pat. No. 5,151,019, the
disclosure of which is incorporated herein by reference.
[0026] Although the shuttle pump 18 is believed to be adequate for
use in the apparatus 12, other forms of pumps may be used without
departing from the scope of the present invention. The present pump
18 may be so configured that the upper pinchers 64 in each slot are
separately actuated from each other, as are the lower pinchers 66
so that fluid flow from each nipple 46 is independent of that of
the other nipples. However, the pump or fluid flow control device
may take on other, entirely different forms. For instance and
without limitation, a peristaltic pump (generally indicated at 70)
of the type shown in FIG. 6 could be used. The peristaltic pump 70
has a pump wheel 72 for each nipple 46 including pegs 74 which
extend perpendicularly outward from the wheel near its periphery.
Each wheel 72 is mounted for rotation, such as by an individual
electric motor (not shown) so that the pegs 74 are brought into
sequential engagement with the nipple 46 to force fluent material F
out of the nipple. By stopping the wheel 72 as shown in FIG. 6, the
nipple would be pinched off so that no fluent material would exit
the bag 16. The wheels 72 could be run at different times and at
different speeds to vary the sequence of fluid delivery and/or the
flow rate between nipples 46. The angular spacing between adjacent
pegs 74 on the wheels 72 could be different so that the amount of
fluent material dispensed for the same angular rotation of the
wheels is different. It is to be understood that FIG. 6 is but one
example of an alternate pump which could be used.
[0027] It will be necessary for viscous fluent material F to
provide a mover in addition to the pump 18 to cause the fluent
material to flow for refilling the nipples 46 after a discharge by
the pump. A second mover of this type is indicated generally by the
reference numeral 90 in FIG. 7. The second mover is shown to
comprise a pair of rollers 92 mounted on arms 94 and located on
opposite sides of the bag 16. The rollers 92 are mounted for free
rotation about their longitudinal axes, and can be separated to
facilitate removal and replacement of the bag 16. The arms 94 are
connected to a controlled actuator (not shown) which is capable of
indexing the arms down to gradually squeeze the bag 16 from top to
bottom to empty the bag. The downward movement of the arms 94 to
squeeze the body 38 of the bag 16 is used to force the fluent
material F downwardly into the nipples 46. It is envisioned that
the arms 94 could be indexed down after the pump 18 has discharged
to assist in refilling the nipples 46 for the next discharge.
[0028] As stated previously, the apparatus 12 has application where
fluent material F is applied onto an article, or injected into an
article. Referring to FIG. 8, the bag 16 may have a fitment, in
this case in the form of an injection needle 96, attached to each
nipple 46 (only one is shown). The needle 96 is formed of a
suitably rigid material and sealingly attached in the outlet of the
nipple 46. The needle 96 could be captured by an injection device
(not shown) to move the needle down into the article before
operation of the pump 18 to eject fluent material. Alternatively,
the needle 96 could be held stationary and the articles moved
upward into the needles. It is to be understood that other types of
fitments (not shown) could be used without departing from the scope
of the present invention. For instance a fitments which allow the
nipple 46 to be attached to another nipple or tube (not shown), or
which shape the fluent material F as it flows out of the nipple
could be used. Moreover, the end of the nipple 46 could be formed
to shape or control flow of the fluent material. Further, polymer
material having different material characteristics (e.g., such as
density and rigidity) could be integrally formed with the material
of the bag 16 at the outlets for such purposes.
[0029] Downstream from the support 14 and the bag 16 is a mechanism
for closing the containers 10 filled with fluent material F. As
shown in FIG. 1, a web 78 from a roll of closure material held by a
second feed roller 80 is fed downwardly under a second guide roller
82 toward and under the first guide roller 26 to the take-up roller
24. Thus, it may be seen that the take-up roller 24 collects both
remnants of the container material web 22 and the closure material
web 78. After passing under the second guide roller 82, the closure
material web 78 is in face-to-face relation with the unformed
material of the web 22 surrounding the open tops of the containers
10. The closure mechanism comprises a heat sealing device 84
capable of coming down against the closure material web 78 and
sealing the closure material with the container material of the web
22 so that the open tops of all four containers 10 in the row are
separately closed, sealing in the fluent material F in the
containers. A punch 86 and a die 88 downstream from the closing
mechanism are operable to move together to punch through the
closure material web 78 and the container material web 22 to
separate each container 10 (including its own closure) from the
container material web and the closure material web. The remnants
of the container material web 22 and the closure material web 78
remain in tact for movement to the take-up roller 24. The punch 86
has four rectangular projections 86A (only one is shown) and the
die has four holes 88A (only one is shown), one for each container
10 in the row. The projections 86A are received in the holes 88A
when the punch 86 and die 88 are activated to cut through the
closure material web 78 and container material web 22. The
containers 10 drop down through the die 88 to the belt conveyor 28
for transport to the box B.
[0030] Having described the construction of the apparatus 12 and
the flexible bag 16, the operation of the apparatus will be
described. As an initial matter, flexible bags such as bag 16 will
have been formed, filled with the fluent material F (e.g., honey)
to be packaged in the containers 10, and sealed at a remote
location, such as a processing plant. The use of bags of the
present invention in manufacturing is not limited to remote
forming, filling and sealing of the bags, but is suited for this
type of manufacturing arrangement. The bags 16 are formed, filled
with the fluent material F and sealed at the processing plant, and
then placed in a suitable transport to the manufacturing facility
where the final packaging is to be done. The bags can be formed,
filled and sealed in an aseptic form/fill/seal machine, or could be
formed under non-aseptic conditions and then sterilized along with
the fluent material after the bag is filled. As previously stated,
it is not necessary that the bags 16 be aseptic where the
conditions do not require it, but bags of this type are
particularly adapted for use where aseptic conditions are needed,
such as in food or medicine packaging.
[0031] Once at the final packaging site, one of the bags 16 is
loaded into the apparatus 12 by lifting at least one end of the rod
42 out of the U-shaped receptacles 44 and sliding the bag onto the
rod so that the rod is received through both of the loops 40 at the
top of the bag. The rod 42 is then replaced on the support 14 with
its ends in the receptacles 44. The door 58 of the pump 18 is open,
substantially as shown in FIG. 4, and the nipples 46 are positioned
in the upper and lower slots of the crosspiece 54 in registration
with the valleys of the shuttle 50. The door 58 is then closed and
the latch locked so that the nipples 46 are received in both the
valleys of the shuttle 50 and the valleys of the anvil 52 (FIG. 5).
The first feed roller 20 will have had a roll of container material
mounted thereon and the web 22 of container material is threaded
from the roll around the first guide roller 26 and attached to the
take-up roller 24. Similarly, the roll of closure material is
received on the second feed roller 80 and the web 78 of closure
material is threaded around the second guide roller 82 to the first
guide roller 26 and then attached to the take-up roller 24. The
apparatus 12 is ready for production operation to form, fill and
seal containers 10.
[0032] Referring now to FIGS. 2A and 2B, the sequence of operation
of the apparatus 12 is described. As illustrated in FIG. 2A, the
first and second feed rollers 20, 80 and the take-up roller 24 are
actuated (such as by one or more electric motors, not shown) to
index the container material web 22 and the closure material web 78
forward one increment. The increment in the illustrated embodiment
corresponds to the dimension of one container 10 to be formed which
is parallel to the lengthwise extent of the web 22 plus a
predetermined amount corresponding to the spacing between adjacent
rows of containers. The first and second feed rollers 20, 80 and
the take-up roller 24 are halted to stop the forward advance of the
container material web 22 and closure material web 78 for a dwell.
The form and die 32 are actuated to engage the container material
web 22 to form a row of containers 10 still attached to the
container material web. The index and form steps are initially
repeated until a row of formed containers 10 underlies the nipples
46 when the container material web 22 dwells.
[0033] This time the shuttle pump 18 is actuated to deliver a
preselected charge of fluent material F to each of the four
containers 10 in the row. After the bag 16 was installed in the
apparatus 12 as described above, the lower pinchers 66 were
extended (to the position shown in solid lines in FIG. 5) to pinch
the nipples 46 near, but spaced somewhat above their lower ends
against the crosspiece 54 in the slots 62. The ends of the nipples
46 were cut open to form outlets for delivering fluent material F.
The upper pinchers 64 are then extended to pinch off the nipples 46
near their upper ends (the position shown in solid lines in FIG. 5)
and define a charge of fluent material F located in each nipple
between the upper pincher and the lower pincher 66. After the first
row of containers 10 stops under the nipples 46, the pump 18 is
activated to retract the lower pinchers 66 into the crosspiece 54
(the position shown in phantom lines in FIG. 5) and slide the
shuttle 50 in a direction transverse to the container material web
22. Retraction of the lower pinchers 66 allows fluent material to
flow out of the nipples 46 under the force of gravity. However, the
pump 18 also deforms the nipples 46 by squeezing to make certain
the charges of fluent material F between the pinchers 64, 66 is
delivered out of the nipples. The sliding of the shuttle 50 moves
the valleys 50B substantially out of registration with the nipples
46 and moves the plateaus 50 A substantially into registration with
the valleys 52B of the anvil 52, squeezing the nipples and forcing
the fluent material out of the outlets at the lower ends and into
the containers 10.
[0034] The shuttle 50 moves back to its original position and the
lower pinchers 66 are extended to close off the nipples 46 against
further flow of fluent material F.
[0035] The upper pinchers 64 are retracted and more fluent material
moves down into the nipple, re-filling it. The upper pinchers 64
are then closed to pinch off the upper ends of the nipples and
define new charges of the same volume as the previous charges and
the cycle is repeated. The re-filling of the nipples 46 preferably
occurs in the time it takes for the container material web 22 to be
advanced forward one row. It will be appreciated that the pump 18
operates at the same time a new row of containers 10 is being
formed during a dwell of the container material web 22. It is
envisioned that additional rollers or other devices (not shown) to
hold the web 22 from vibrating under the bag 16 as a result of the
act of forming of the containers could be used as needed.
[0036] The filled containers 10 in the row move downstream with
each feed of the container material web 22, eventually passing
under the closure material web 78. The open tops of the containers
10 are covered by the closure material web 78 when the containers
reach the heat sealing device 84. During the dwell, the
heat-sealing device 84 moves down against the closure material web
78 and seals the closure material to the unformed material of the
container material web 22 surrounding the open upper ends of the
containers 10. The fluent material F is now sealed inside the
containers 10. The containers continue to be attached to the
container material web 22 and are now also attached to the closure
material web 78. The attachment is illustrated by the dashed lines
on the closure material web 78.
[0037] At a subsequent dwell, the row of sealed containers 10 is
aligned with the punch 86 and die 88 which are actuated to cut
through the closure material web 78 and container material web 22
to separate the sealed containers from the webs. The containers 10
fall through the holes 88A in the die 88 onto the belt conveyor 28.
The belt conveyor may run continuously to carry the loose
containers to the box B. In the illustrated embodiment, the
containers 10 simply fall into the box B (i.e., are tumble packed).
It will be understood that other final packing arrangements within
the knowledge of those of ordinary skill could be used. The
remnants of the container material web 22 and the closure material
web 78 continue on around the second guide roller 82 to the take-up
roller 24.
[0038] When the bag 16 is exhausted of fluent material F, it may be
removed and replaced with a new bag. The exhausted bag 16 can be
disposed. It will be appreciated that none of the machinery of the
apparatus 12 comes into contact with the fluent material F in the
packaging operation. The bags 16 themselves, rather than the fluent
material F, are acted upon by the pump 18 to cause the containers
10 to be filled so that the bags may serve as the aseptic surfaces
in the apparatus 12. Of course, the container material and the
closure material must be aseptic when conditions require it, but in
every circumstance it will be easier to keep the parts of the
apparatus 12 which handle this material clean. It will not be
necessary in the ordinary course to clean the fluent material from
the apparatus 12.
[0039] In view of the above, it will be seen that the several
objects of the invention are achieved and other advantageous
results attained.
[0040] When introducing elements of the present invention or the
preferred embodiment(s) thereof, the articles "a", "an", "the" and
"said" are intended to mean that there are one or more of the
elements. The terms "comprising", "including" and "having" are
intended to be inclusive and mean that there may be additional
elements other than the listed elements.
[0041] As various changes could be made in the above without
departing from the scope of the invention, it is intended that all
matter contained in the above description and shown in the
accompanying drawings shall be interpreted as illustrative and not
in a limiting sense.
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