EP1666361A1 - Poche déchirable - Google Patents

Poche déchirable Download PDF

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Publication number
EP1666361A1
EP1666361A1 EP04292705A EP04292705A EP1666361A1 EP 1666361 A1 EP1666361 A1 EP 1666361A1 EP 04292705 A EP04292705 A EP 04292705A EP 04292705 A EP04292705 A EP 04292705A EP 1666361 A1 EP1666361 A1 EP 1666361A1
Authority
EP
European Patent Office
Prior art keywords
pouch
seal
tube
jaw
heat sealing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04292705A
Other languages
German (de)
English (en)
Inventor
Stephan Chapougnot
Alan K. Breck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liqui Box Canada Inc
Original Assignee
Liqui Box Canada Inc
EI Du Pont de Nemours and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Liqui Box Canada Inc, EI Du Pont de Nemours and Co filed Critical Liqui Box Canada Inc
Priority to EP04292705A priority Critical patent/EP1666361A1/fr
Priority to CA002497718A priority patent/CA2497718A1/fr
Priority to US11/061,497 priority patent/US20060110081A1/en
Priority to MXPA05012390A priority patent/MXPA05012390A/es
Priority to BRPI0506080-0A priority patent/BRPI0506080A/pt
Publication of EP1666361A1 publication Critical patent/EP1666361A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture

Definitions

  • the present invention relates to a pouch for containing flowable materials which is easy to tear open, a heat sealing assembly for a vertical form, fill and seal machine for use in manufacturing the pouch, and a process for manufacturing the pouch.
  • Packaging pouches are typically made on vertical form, fill and seal machines. Using such a machine, a flat web of synthetic thermoplastic film is unwound from a roll and formed into a continuous tube in a tube forming operation, by sealing the longitudinal edges of the film together to form a lap seal or a fin seal. The tube thus formed is pulled vertically downwards to a filling station. The tube is then collapsed across a transverse cross-section of the tube, the position of the cross-section being at a sealing device below the filling station. A transverse heat seal is made by the sealing device at the collapsed portion of the tube, thus making an airtight seal across the tube.
  • the sealing device generally comprises a pair of jaws.
  • a quantity of material to be packaged for example a liquid is caused to enter the tube at the filling station, and to fill the tube upwardly from the aforementioned transverse seal.
  • the tube is then caused to move downwardly a predetermined distance. This movement may be under the influence of the weight of the material in the tube, or it may be caused by pulling or mechanically driving the tube.
  • the jaws of the sealing device are closed again, thus collapsing the tube at a second transverse section.
  • the second transverse section may be above, usually just above the air/material interface in the tube, or the second transverse section may be below the air/material interface.
  • the sealing device seals and severs the tube transversely at the second transverse section.
  • the material filled portion of the tube is now in the form of a pillow shaped pouch.
  • the sealing device has sealed the top of the filled pouch and sealed the bottom of the next to be formed pouch, all in one operation.
  • the filling of the product may be conducted on a continuous or intermittent basis.
  • One such vertical form, fill and seal machine of the type described above is sold under the trade-mark PREPAC.
  • Other suitable machines are sold under the trade-marks INPACO and ELECSTER.
  • the sealing device does not sever the tube at the second transverse section, but does sever the tube subsequently.
  • the packaging process is often referred to as a hot-fill process.
  • flowable materials may be packaged in this manner, for example, milk, syrups, sauces, juices, water and the like.
  • the term "flowable material” is meant to encompass materials which are flowable under gravity or may be pumped. Such materials may include emulsions, pastes, peanut butter, preserves, dough, ground meat, powders, detergents, oils and granular solids. It is anticipated that this pouch could be used for containing flowable materials, in particular foods that are packaged under sterile, pasteurized or aseptic conditions.
  • the pouches produced through this type of process can be manufactured to contain any volume of flowable material.
  • a typical size might be 250 mls or 500 mls. In such instance, it is possible to consume the fluid directly from the pouch.
  • providing a pouch that includes an easy tear opening for this purpose is desirable since it avoids the necessity to use an implement such as a knife or scissors.
  • these packages are meant to be one-time use packages it is appropriate that the manner in which they are manufactured is as economical as possible, without sacrificing the basic packaging requirements for the materials in question.
  • 3,759,439 which includes a flexible reinforcement having a highly localized line of weakness, the reinforcement being bonded to the surface of the film or incorporated partly or wholly within its thickness.
  • the present invention seeks to provide a pouch that can be easily torn open which can be manufactured using a vertical form, fill seal apparatus which permits the formation of a tear line simultaneously with the sealing of the pouch.
  • the present invention provides in one aspect a pouch for containing a flowable material manufactured in a vertical form, fill and seal process wherein a pouch is formed from a sheet of thermoplastic film and a transverse heat seal formed between pouches as they are filled serves as a top closure for a lower pouch and a bottom closure for an upper pouch, wherein the pouch is provided with an easy open feature just above or below a respective closure, which comprises a second seal formed between two layers of film in a portion of an edge of the pouch that is in close proximity to and extends inwardly from a corner of the pouch to provide a tear line to open the pouch.
  • the invention provides a heat sealing assembly for use in a vertical form, fill and seal apparatus for sealing at least two layers of thermoplastic film together, comprising a first jaw and a second jaw, a first and a second electrical impulse heat sealing element mounted on the first jaw, at least one of said jaws being capable of transverse motion and adapted to collapse a tubular film made from said thermoplastic film and to allow the film to pass between said jaws, the first electrical impulse heat sealing element being about the length of the width of the collapsed tubular film so that the flattened tube can be sealed and cut, and the second electrical impulse heat sealing element mounted on the first jaw being in close proximity to the first element and arranged so that the seal it creates extends from one edge of the collapsed tube for a short distance towards the interior of the tube so that a second seal can be made in the tube to provide a tear line for opening the pouch.
  • the invention provides a process for manufacturing a pouch for containing a flowable material which comprises forming a thermoplastic film into a film tube by forming a vertical fin seal or lap seal in the tube, drawing the tube through a heat sealing assembly of a vertical form, fill and seal apparatus, collapsing the tube, forming a first transverse seal in the tube, continuously filling the tube with a flowable material, allowing the filled tube to drop down a predetermined distance from the heat sealing assembly, collapsing the filled tube and heat sealing the tube again with the heat sealing assembly to provide a first seal across the tube and a simultaneous cut therethrough so that a pillow shaped pouch is formed, a second seal being provided simultaneously by the heat sealing assembly, which is in close proximity to the top seal of the pouch and extends inwardly from the adjacent side edge of the pouch, thereby providing a tear line for opening the pouch.
  • a heat sealing assembly for use in a vertical form, fill and seal apparatus for making flowable material filled pouches, the assembly being adapted for sealing a thermoplastic film together to form a tube which is filled with the flowable material and sealed and cut into pouches containing such material, which assembly comprises a transversely oriented jaw and a vertically oriented jaw, the vertically oriented jaw being adapted to seal edges of the film with a fin seal or an overlap seal, the horizontal jaw being adapted for transverse motion and to collapse the tubular film and to allow the tubular film when filled with flowable material to pass between its members, which cut and seal the tubular film to form pouches, the vertically oriented jaw having an electrical impulse heat sealing element arranged vertically in a member thereof and being about the length of a pouch, the transversely oriented jaw having an electrical impulse heat sealing and cutting element and being about the width of a pouch, so as to cut and seal the collapsed and filled tubular film, whereby the seal formed provides a bottom closure for an upper pouch and
  • the second seal formed in the pouch may take any suitable shape such as curved or straight, although a straight line is illustrated in the example of this invention produced. Obviously, a shape that directs the tear so that a corner of the pouch is removed would be most desirable.
  • the angle of this second seal relative to the first seal may be varied in a suitable manner. Thus, the two seals may be spaced and parallel, or the second seal may extend from the outer edge towards the sealed edge.
  • a satellite sealing mechanism can be associated with the vertical seal jaws in somewhat the same manner as the above embodiment is associated with the horizontal jaw.
  • a short auxiliary seal can be formed in the machine direction at the opposite side of the pouch to the vertical fin seal.. This short seal would be in the horizontal jaw area so that it would be cut in two by the horizontal seal.
  • An easy tear notch would be created in the pouch above and below the horizontal seal. Thus each pouch would have two tear off notches.
  • Suitable films include any synthetic thermoplastic polymeric film which meets the above-mentioned criteria.
  • PCT Application WO 99/06476 discloses polymer films made from a homogeneously branched linear ethylene interpolymer film which may be a two-layer or a three-layer coextruded film containing at least one seal layer of a homogeneously branched linear polyethylene.
  • a heat sealable multilayer film comprising about 10% by volume of the overall film structure made from an ethylene-styrene copolymer obtained using a single-site catalyst polymerization process and one or more layers comprising: at least one interpolymer selected from interpolymers of ethylene and one or more C 3 -C 20 ⁇ -olefins made by polymerization processes using single-site catalyst, non single-site catalyst and mixtures of such catalysts, and blends thereof.
  • the films may contain a barrier layer selected from nylon polymers, polyethylene terephthalate polymers, amorphous nylon or ethylene vinyl alcohol.
  • An additional tie layer may be present and can be selected from ethylene vinyl acetate polymer, ethylene acid copolymers, ionomers or anhydride functionalized ethylene copolymers. And all of these may be combined with at least one high pressure ethylene homopolymer.
  • suitable films are described in the following additional references: WO 98/34844, WO 98/29249, WO 97/20693, WO 97/12755, WO 95/21743, WO 95/10566, WO 95/00587, the disclosures of which are incorporated herein by reference. These are merely representative examples of thermoplastic films and the invention is not to be limited in any way with respect to the film selected for manufacture of the pouch of the invention.
  • the heat-sealing assembly of the invention is for use on vertical form, fill, seal machines. Examples of how the assembly is mounted in such a machine may be found in EP 0573447B1, US 2001/10032710A1 and US 5,538,590, the disclosures of which are incorporated herein by reference. A variety of these machines are known to be commercially available and included, but not limited to, are machines manufactured and sold by Prepac, Thimmonier, Inpaco and Elecster. An early patent granted to Prepac for such a machine is U.S. Patent No. 3,886,714, the disclosures of which are incorporated herein by reference.
  • the heat seal assembly can be mounted in the standard jaws of the vertical form, fill, seal apparatus in a manner as would be apparent to a person skilled in the art.
  • the element 10 comprises a backup support 11, a backup rubber 17 and a main sealing element 18.
  • first and second seal reliefs 13 and 14, respectively, can be seen.
  • the seals 13 and 14 are parallel one to the other, although the second short seal 14 can take other shapes and directions as described earlier.
  • the main element 18 includes heating element 12.
  • FIG. 3 a pouch 20 manufactured according to the process of the present invention is illustrated.
  • the top seal 22 and bottom seal 25 can be seen as well as the vertical seal 23.
  • the second seal is clearly shown in the top pouch of the Figure and the three other pouches in descending order illustrate the tearing of corner 24 of the pouch to create an opening 24a in the pouch for dispensing or accessing the packaged contents.
  • FIG 4 there is illustrated schematically a fill tube 30 inside a film tube 31 which is meant to be fin sealed at its side edge 33.
  • Sealing bar 32 which represents a portion of a sealing device (not shown), is arranged in the machine direction or vertical direction and is meant to be provided with two sealing elements 15 and 16 as seen in the heat sealing element 18 shown in Figure 2.
  • FIG. 5 illustrates a pouch shown generally at 40 made using the arrangement of Figure 4.
  • Pouch 40 is made from a film tube 41 which is formed by making a fin, side or vertical side seal 43.
  • a short seal 42 is formed in the pouch 40, adjacent seal 43.
  • seal 42 is shown to be spaced from and parallel to seal 43.
  • sealing bar 32 may be formed and positioned such that the short seal 42 is formed in pouch 40 so that it extends through two pouches 40. In such instance, each pouch 40 would have a short seal 42 at either transverse edge 44 and hence could be torn open using either seal 42.
  • FIGS. 6 and 7 illustrate pouches shown generally at 40, with like numerals identifying like elements.
  • the pouch of Figure 6 shows a single second seal 42 made by a satellite second sealing element (not shown) that is made in edge 45 which is opposite a fin seal 43 formed in pouch 40.
  • the second seal 42 may be formed at the top and bottom edges (44) of pouch 40, depending on how the satellite second sealing element is positioned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Bag Frames (AREA)
EP04292705A 2004-11-16 2004-11-16 Poche déchirable Withdrawn EP1666361A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP04292705A EP1666361A1 (fr) 2004-11-16 2004-11-16 Poche déchirable
CA002497718A CA2497718A1 (fr) 2004-11-16 2005-02-18 Sac a ouverture par dechirure
US11/061,497 US20060110081A1 (en) 2004-11-16 2005-02-18 Tear open pouch
MXPA05012390A MXPA05012390A (es) 2004-11-16 2005-11-16 Bolsa de apertura por desprendimiento.
BRPI0506080-0A BRPI0506080A (pt) 2004-11-16 2005-11-16 bolsa para conter um material fluido, conjuntos de selagem à quente e processo para fabricação de uma bolsa

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04292705A EP1666361A1 (fr) 2004-11-16 2004-11-16 Poche déchirable

Publications (1)

Publication Number Publication Date
EP1666361A1 true EP1666361A1 (fr) 2006-06-07

Family

ID=34931529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04292705A Withdrawn EP1666361A1 (fr) 2004-11-16 2004-11-16 Poche déchirable

Country Status (5)

Country Link
US (1) US20060110081A1 (fr)
EP (1) EP1666361A1 (fr)
BR (1) BRPI0506080A (fr)
CA (1) CA2497718A1 (fr)
MX (1) MXPA05012390A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2452368A (en) * 2007-08-28 2009-03-04 Hood Packaging Corp Easy-tear, non-laminated, polyolefin based pouch and method of fabrication
SG169249A1 (en) * 2009-08-25 2011-03-30 Biow Ay Organic Inc Seal-free pouch

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8191598B2 (en) * 2007-07-30 2012-06-05 Liqui-Box Corporation Heat sealing jaw apparatus
US9981792B2 (en) * 2014-03-07 2018-05-29 Poppack Llc Package for humanitarian efforts with unique reclosing mechanism
EP2952450A1 (fr) * 2014-06-05 2015-12-09 Amcor Flexibles UK Ltd Emballage de lingettes et de tissus
US10029407B2 (en) 2014-12-04 2018-07-24 Big Heart Pet, Inc. Apparatus, processes, and systems for heat sealing
USD896634S1 (en) 2019-01-29 2020-09-22 Golden State Foods Corp. Container
USD896633S1 (en) 2019-01-29 2020-09-22 Golden State Foods Corp. Container
US11865793B2 (en) * 2019-07-29 2024-01-09 Scholle Ipn Ip Bv Production of collapsible pouches

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1216422A (fr) * 1958-11-24 1960-04-25 Vinifruit Enveloppe plastique à ouverture automatique destinée à contenir des produits divers et ses procédé et outillage de réalisation
GB898641A (en) * 1957-07-24 1962-06-14 Selwyn Brown Improvements relating to packaging and packages
EP0372886A2 (fr) * 1988-12-05 1990-06-13 Du Pont Canada Inc. Film stratifié qui se déchire transversalement

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1355036A (en) * 1970-04-14 1974-06-05 Ici Ltd Articles of plastic film
FR2240866B1 (fr) * 1973-08-14 1978-05-19 Prepac Sarl
US4176567A (en) * 1977-03-18 1979-12-04 Warren Weisberg Method of making a tear line-forming perforation in a sealed marginal portion of a bag and a sealed bag formed thereby
US5417035A (en) * 1988-09-06 1995-05-23 Kcl Corporation Apparatus and method for manufacture flexible reclosable containers
US4890744A (en) * 1988-10-28 1990-01-02 W. A. Lane, Inc. Easy open product pouch
GB8902320D0 (en) * 1989-02-02 1989-03-22 Du Pont Canada Detucker for vertical form and fill machine
JP2895176B2 (ja) * 1990-07-30 1999-05-24 味の素株式会社 易引き裂き性フィルム及びそれから作られたパウチ
US5538590A (en) * 1991-02-26 1996-07-23 Dupont Canada Inc. Sealing element for packaging machines
US6371644B1 (en) * 1997-05-22 2002-04-16 Sealstrip Corp. Reclosable seal, package, method and apparatus
CA2295450C (fr) * 2000-01-11 2007-11-13 David Campbell King Element a sceller a chaud, facile a monter et pour machines a emballer
US6428642B1 (en) * 2000-03-13 2002-08-06 Illinois Tool Works Inc. Transverse directional zipper with a double seal flange profile configuration

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB898641A (en) * 1957-07-24 1962-06-14 Selwyn Brown Improvements relating to packaging and packages
FR1216422A (fr) * 1958-11-24 1960-04-25 Vinifruit Enveloppe plastique à ouverture automatique destinée à contenir des produits divers et ses procédé et outillage de réalisation
EP0372886A2 (fr) * 1988-12-05 1990-06-13 Du Pont Canada Inc. Film stratifié qui se déchire transversalement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2452368A (en) * 2007-08-28 2009-03-04 Hood Packaging Corp Easy-tear, non-laminated, polyolefin based pouch and method of fabrication
SG169249A1 (en) * 2009-08-25 2011-03-30 Biow Ay Organic Inc Seal-free pouch

Also Published As

Publication number Publication date
US20060110081A1 (en) 2006-05-25
BRPI0506080A (pt) 2006-09-19
CA2497718A1 (fr) 2006-05-16
MXPA05012390A (es) 2006-05-25

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