U.S. patent application number 13/203289 was filed with the patent office on 2012-01-19 for stand-up bag.
This patent application is currently assigned to AMCOR FLEXIBLES KREUZLINGEN LTD.. Invention is credited to Daniel Bossel, Rico Menard, Olivier Muggli, Joachim Pietzsch, Tim Revell.
Application Number | 20120014623 13/203289 |
Document ID | / |
Family ID | 40852033 |
Filed Date | 2012-01-19 |
United States Patent
Application |
20120014623 |
Kind Code |
A1 |
Bossel; Daniel ; et
al. |
January 19, 2012 |
STAND-UP BAG
Abstract
In a flat-ended bag made of a flexible film material, two bag
wall parts are connected via two longitudinal seams running
substantially in a longitudinal direction (z) to form a bag wall
that forms a tubular body and has sealing edge strips projecting
from the bag wall. The tubular body is closed at both ends, at
least one end of the tubular body has a base part disposed
substantially perpendicular to the longitudinal axis (z) and
serving as a standing surface, and a resealable opening is provided
on at least one end of the tubular body. In order to increase the
rigidity of the tubular body, the sealing edge strips are folded
over onto the bag wall and sealed or glued to the bag wall.
Inventors: |
Bossel; Daniel;
(Schaffhausen, CH) ; Menard; Rico; (Kirchberg,
CH) ; Muggli; Olivier; (Wetzikon, CH) ;
Pietzsch; Joachim; (Gottmadingen, DE) ; Revell;
Tim; (Tunbridge Wells, GB) |
Assignee: |
AMCOR FLEXIBLES KREUZLINGEN
LTD.
Kreuzlingen
CH
|
Family ID: |
40852033 |
Appl. No.: |
13/203289 |
Filed: |
February 17, 2010 |
PCT Filed: |
February 17, 2010 |
PCT NO: |
PCT/EP2010/000970 |
371 Date: |
August 25, 2011 |
Current U.S.
Class: |
383/104 |
Current CPC
Class: |
B65D 75/008 20130101;
B65D 35/44 20130101 |
Class at
Publication: |
383/104 |
International
Class: |
B65D 30/16 20060101
B65D030/16 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 26, 2009 |
EP |
09 405 038.2 |
Claims
1. A stand-up bag made of a flexible film material, in which two
bag wall parts are connected by two longitudinal seams extending
substantially in a longitudinal direction (z) to form a bag wall
forming a tubular body, with sealing edge strips projecting from
the bag wall, the tubular body being closed at the two ends, at
least one end of the tubular body having a base part arranged
substantially perpendicular to the longitudinal axis (z) and
serving as a standing face and a reclosable opening being provided
at at least one end of the tubular body, wherein the sealing edge
strips are folded over onto the bag wall to increase the rigidity
of the tubular body and are sealed or glued to the bag wall.
2. A stand-up bag according to claim 1, wherein the two sides of
the flexible film material are sealable.
3. A stand-up bag according to claim 1, wherein the side of the
flexible film material forming the inside of the bag wall is
sealable and the sealing edge strips which are folded over onto the
bag wall and/or the regions covered by the folded-over sealing edge
strips are provided with a sealable coating or with an adhesive
coating.
4. A stand-up bag according to claim 1, wherein the standing face
is formed by a closure part attached to one end of the tubular
body, with a flange having an outlet opening and a closure lid
which can reclose the outlet opening.
5. A stand-up bag according to claim 4, wherein the closure lid can
be screwed onto the flange or is configured as a folding lid.
6. A stand- bag according to claim 4, wherein the other end of the
tubular body is closed by means of a transverse seam.
7. A stand-up bag according to claim 4, wherein a base part is
sealed in at the other end of the tubular body to increase the bag
volume or an enveloped folding base is provided.
8. A stand up bag according to claim 1, wherein the standing face
is formed by a flat base which is produced at one end of the
tubular body by folding and sealing the film material or by a
sealed-in base part.
9. A stand-up bag according to claim 8, wherein the other end of
the tubular body is provided with a closure part with a reclosable
outlet opening.
10. A stand-up bag according to claim 9, wherein the closure part
is formed by a flange having an outlet opening and a closure lid,
which can reclose the outlet opening, or by a zipper closure.
11. A stand up bag according to claim 8, a closure part with a
flange having an outlet opening and a closure lid, which can
reclose the outlet opening, is arranged in the flat base or in the
sealed-in base part.
12. A stand-up bag according to claim 11, wherein the closure lid
can be screwed into the flange or is configured as a folding
lid.
13. A method for packaging a pasty, creamy, partly solid/partly
liquid, liquid or pourable product, wherein the method comprises
packaging the product in a stand-up bag according to claim 1.
14. A method according to claim 13, wherein the product is a
food.
15. A stand-up bag according to claim 5, wherein the folding lid is
articulated to the flange.
16. A stand-up bag according to claim 12, wherein the folding lid
is articulated to the flange.
Description
[0001] The invention relates to a stand-up bag made of a flexible
film material, in which stand-up bag two bag wall parts are
connected by two longitudinal seams extending substantially in a
longitudinal direction to form a bag wall forming a tubular body,
with sealing edge strips projecting from the bag wall, the tubular
body being closed at the two ends, at least one end of the tubular
body having a base part arranged substantially perpendicular to the
longitudinal direction and serving as a standing face, and a
reclosable opening being provided at at least one end of the
tubular body.
[0002] In order, for example, to store mayonnaise or ketchup in the
refrigerator, plastics material bottles which can easily be
deformed by hand pressure, so-called squeeze bottles, are often
used. These bottles are generally stored standing on their head, so
the product always flows toward the discharge opening, following
gravity. A valve is generally attached to the opening mouth, so a
metered removal of filling product is only possible by means of a
pressure applied by hand by way of the bottle. Such packagings have
proven successful in the past above all for ketchup, mayonnaise and
other partially solid products, but are relatively expensive
because of their solid form of construction.
[0003] Stand-up bags for pourable products, such as, for example,
coffee powder, made of a flexible film material with a flat base or
an enveloped base as the standing face, and a reclosable opening in
the form of a zipper opposing the standing face, are also known. A
substantial drawback of these stand-up bags is their low degree of
rigidity, whereby the bag often no longer stands upright after
removal of the filling product or has no standing ability at
all.
[0004] A bag tube made a film material with an outlet nozzle, which
can be closed by means of a folding lid, is known from EP 0 966 390
B1. The tube which is provided for storage on its head has two bag
wall parts, which are connected by two longitudinal seams extending
in the longitudinal direction of the tube to form a bag wall
forming a tubular body, with sealing edge strips projecting from
the bag wall. This bag tube also has relatively low rigidity and
leads to a reduced standing ability with progressive removal of the
filling product.
[0005] It is known from WO 2008/013275 A to insert a flat bag
produced from two bag wall parts, which are made of a
thermoplastics material and sealed to one another peripherally at
the edges, with a sealed-in base and closure part, into a tubular
metal form and to expand it by blowing in hot air through the
closure part until the bag wall parts rest on the inner wall of the
metal form and a stand-up bag is produced. The longitudinal seams
which are initially projecting laterally from the bag wall as
sealing edge strips are in the process folded onto the bag wall by
the pressure exerted by the metal form. A sealing or gluing of the
sealing edge strips, which have been folded over onto the bag wall,
onto the bag wall does not take place during the forming and is
also not provided.
[0006] The invention is therefore based on the object of developing
a stand-up bag of the type mentioned at the outset in such a way
that a tubular body has good rigidity even with a relatively thin
film material and the bag retains good standing ability during
use.
[0007] The object is achieved according to the invention in that
the sealing edge strips increase the rigidity of the tubular
body.
[0008] The side of the flexible film material forming the inside of
the bag wall can be sealable and the sealing edge strips folded
onto the bag wall and/or the regions covered by the folded-on
sealing edge strips can be provided with a sealable coating or with
an adhesive coating. However, the two sides of the flexible film
material are preferably sealable.
[0009] In a first embodiment of a stand-up bag, a standing face is
formed by a closure part, which is attached to one end of the
tubular body, with a flange having an outlet opening and a closure
lid, which can reclose the outlet opening. The closure lid can be
screwed onto the flange or be configured as a folding lid
preferably articulated to the flange.
[0010] The other end of the tubular body may be closed by means of
a transverse seam. To increase the bag volume, a base part can also
be sealed in or an enveloped folding base may be provided.
[0011] In a second embodiment of a stand-up bag, the standing face
is formed by a flat base which is produced at one end of the
tubular body by folding and sealing the film material or by a
sealed-in base part. The other end of the tubular body may be
provided with a closure part with a reclosable outlet opening. The
closure part may be formed by a flange having an outlet opening and
a closure lid, which can reclose the outlet opening, or a zipper
closure.
[0012] A closure part with a flange having an outlet opening and a
closure lid, which can reclose the outlet opening, may also be
arranged in the flat base or in the sealed-in base part, it being
possible to screw the closure lid onto the flange or for it to be
formed as a folding lid preferably articulated to the flange.
[0013] The stand-up bag according to the invention is suitable, in
particular, for packaging pasty, creamy, partly solid/partly
liquid, liquid and pourable filling products, in particular
food.
[0014] Substantially all known flexible packaging materials may be
used as the flexible film material. The packaging materials should
be suitable for machine use, i.e. suitable for use on packaging
machines. The flexible film material may basically have a single
layer, but is multi-layer in most cases. The individual material
layers may be applications of varnish, foils made of metals,
metallised layers or films made of plastics materials, in
particular thermoplastic plastics materials or composites made of
metal foils and plastics material films. One or more material
layers may be extruded layers or films made of thermoplastic
plastics materials, optionally in the composite with films/foils
made of metals or plastics materials. At least one material layer
may be an application of varnish, such as a clear varnish, a
coloured varnish, a hot metal coating etc. At least one material
layer may be a metallised layer or a vacuum-deposited, ceramic thin
layer.
[0015] Adhesives, extrusion adhesives, adhesion promoters and/or
primers may be located between the individual layers. To increase
the adhesion of the layers to one another, the surfaces of the
metal layers may be subjected, for example, to a corona flame,
ozone or plasma treatment.
[0016] The material layers which are made of thermoplastic plastics
materials, may be transparent, translucent or opaque. For example,
the material layer, film or coating on the outside of the packaging
may have printing. In the case of a transparent or translucent
outer material layer, film or coating, a reverse printing or an
exterior printing and a reverse printing may be applied.
[0017] Steel foils and preferably aluminium foils are used, for
example, as foils made of metal. The thickness of the foils may,
for example, be 5 to 100 .mu.m, preferably 8 to 30 .mu.m.
[0018] Suitable films which are made of plastics materials are
expediently made of thermoplastic plastics materials, such as
polyester, polyolefins, such as polypropylenes or polyethylenes,
polyamides, polyvinylchloride, polycarbonate etc or of
cellulose-containing materials, such as cellophane. The films which
are made of plastics material may be present as monofilms or film
composites. The thickness of the films which are made of plastics
materials may, for example, be 8 to 100 .mu.m, preferably 12 to 30
.mu.m and, in particular, 12 to 23 .mu.m.
[0019] Extruded layers may, for example, be made of polyolefins,
such as polypropylenes or polyethylenes. The thickness of the
extrusion layers may, for example, be 8 to 100 .mu.m, preferably 12
to 30 .mu.m and, in particular, 12 to 23 .mu.m.
[0020] The side of the film material which is on the inside of the
packaging is preferably sealable. The outer side of the composite
material is expediently also sealable.
[0021] Examples of a flexible film material are composites made of
at least two material layers. A first material layer may be a film,
such as a monofilm or composite film, made of thermoplastic
plastics materials, such as polyester, polyolefins, such as
polypropylenes or polyethylenes, polyamides, polyvinylchloride,
polycarbonate etc., or made of cellulose-containing materials, such
as cellophane or papers. The film may be printed on the side
pointing outwardly on the finished packaging and/or be
reverse-printed and is preferably provided with a sealable layer,
such as, for example, a sealing varnish. The second material layer
may, for example, be a metal foil or a metal foil with a sealing
layer or a sealable foil attached on the side pointing inwardly on
the finished packaging. The second material layer may, in another
embodiment, be a sealable film made of a thermoplastic plastics
material or an extrusion layer made of a thermoplastic plastics
material, which is preferably sealable. Optionally, papers, for
example coated papers may also be used as the second material
layer. Optionally, varnish layers or varnish applications can also
be used as the second material layer. The varnishes may be clear,
opaque and colourless or coloured. In accordance with the product
to be packaged, the composite material may have barrier properties
against the passage of liquids, gases, vapours, steam, flavours or
odorous materials. To achieve barrier properties, metal foils,
metallised layers, for example made of aluminium, ceramic thin
layers, for example made of silicon oxides and/or aluminium oxide,
which are applied by sputtering or by vacuum deposition, or
plastics materials, for example, made of materials from the series
of styrene copolymers, ethyl-vinyl-alcohol polymers or
polyvinylidene chloride may be used. Examples of sealable materials
for the films or extrudates are polyolefins, such as polyethylenes,
polypropylenes or co- and terpolymers of ethylene with acrylic
acid. The sealability of the film material can also be achieved by
an application of a sealing varnish.
[0022] The stand-up bags are generally smoothed out, after removal
of the product, against the standing face. It is also conceivable
for the bag to be rolled up from its end. For the latter case, the
selection of a film material with dead-fold properties is
advantageous.
[0023] Further advantages, features and details of the invention
emerge from the following description of preferred embodiments and
with the aid of the drawings, which are only used for illustration
and are not to be understood in a restrictive manner. In the
drawings, schematically,
[0024] FIG. 1 shows a side view of a first embodiment of a stand-up
bag with a folding lid;
[0025] FIG. 2 shows a side view of a second embodiment of a
stand-up bag with a sealed-in base part and zipper closure;
[0026] FIG. 3 shows a section through the stand-up bag of FIG. 1
and FIG. 2 along the line I-I;
[0027] FIG. 4 shows a detail of FIG. 3 in an enlarged view.
[0028] A stand-up bag 10 shown in FIG. 1 in tube form has a tubular
body 12 which is permanently closed on one end by a transverse seam
14. A flange part 16 with a removal opening, which can be closed by
means of a folding lid 18, is arranged at the other end of the
tubular body.
[0029] The tubular body 12 consists of two bag wall parts 20, 22,
which are connected by two longitudinal seams extending
substantially in a longitudinal direction z of the tubular body 12
to form a bag wall. The longitudinal seams projecting outwardly
from the bag wall and present in the form of sealing edge strips
24, 26 are folded over onto the bag wall and rigidly connected
thereto (FIGS. 3 and 4). The folding lid 18 is used as a standing
face and is substantially perpendicular to the longitudinal
direction z of the tubular body 12.
[0030] Instead of the transverse seam 14, the tubular body 12 can
also be closed to increase the bag volume, with a sealed-in base
part 17 shown in FIG. 2 or with an enveloped flat base.
[0031] A conventional stand-up bag 110 shown in FIG. 2 in the form
of a Doy Pack also has a tubular body 12 made of two bag walls
parts 20, 22 connected by two longitudinal seams extending
substantially in a longitudinal direction z to form a bag wall. At
one end of the tubular body 12, a base part 17 serving as a
standing face is sealed in. At its other end, the tubular body 12
is rigidly sealed by a separable transverse seam 14. A zipper
closure 19 is sealed in between the bag wall parts 20, 22 below the
separable transverse seam 14. The longitudinal seams projecting
outwardly from the bag wall and present in the form of sealing edge
strips 24, 26 are also folded over onto the bag wall here and
rigidly connected thereto (FIGS. 3 and 4).
[0032] The stand-up bag 110 shown in FIG. 2 may also have an
enveloped base part 17. Likewise, the base part 17 of the stand-up
bag 110 may be equipped with a closure system with a folding lid
18.
[0033] As can be seen in FIG. 4 in particular, the sealing edge
strip 26 which is folded over onto the bag wall or onto the bag
wall part 22 is permanently connected to the bag wall by an
adhesive or sealing compound 28. This adhesive or sealing compound
28 may, for example, be applied locally to the film material at
predetermined points by the register printing method before the bag
production. No additional application of sealing compound in the
region of the sealing edge strips 24, 26 is necessary in a film
material with a sealable inner and outer layer arranged on both
sides.
* * * * *