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Publication numberUS3900155 A
Publication typeGrant
Publication dateAug 19, 1975
Filing dateFeb 11, 1974
Priority dateFeb 20, 1973
Also published asCA1002470A1, DE2407345A1, DE2407345B2, DE2460705A1, DE2460705B2, DE2460705C3
Publication numberUS 3900155 A, US 3900155A, US-A-3900155, US3900155 A, US3900155A
InventorsOlsen Jan-Erik, Rauser Jan Axel Ingemar, Rausing Hans A
Original AssigneeTetra Pak Dev
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Package
US 3900155 A
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Description  (OCR text may contain errors)

United States Patent Rausing et a1.

[ 1 Aug. 19, 1975 1 PACKAGE [75] Inventors: Hans A. Rausing, Lund; Jan-Erik Olsen, Malmo; Jan Axel lngemar Rauser, Lomma, all of Sweden [73] Assignee: Tetra Pak Development SA,

Lausanne, Switzerland [22} Filed: Feb. 11, 1974 [21] Appl, No: 441,218

[30] Foreign Application Priority Data Feb. 20, 1973 Switzerland 2410/73 [52] U5. C1 229/7 R; 229/17 R; 117/68 [51] Int. Cl. B65D 5/12 [58] Field of Search 229/7 R, 17; 117/68 [56] References Cited UNITED STATES PATENTS 1,520,527 12/1924 Brooks 229/7 R Z.l53 91l 4/1939 Benedetti 229/7 R X 2,309,144 l/l943 Taylor 229/7 R 2,784,892 3/1957 Feher 229/7 R 2,983,962 5/1961 Merz et al 161/161 3,039,669 6/1962 Hill 229/7 R X 3,213,071 10/1965 Campbell 161/161 FOREIGN PATENTS OR APPLICATIONS 363,931 9/1962 Switzerland 229/7 R Primary ExaminerDavis T. Moorhead Attorney, Agent, or FirmPierce, Scheffler & Parker 1 5 7 ABSTRACT 5 Claims, 3 Drawing Figures PACKAGE The present invention relates to a package of disposable character and of the type which is manufactured from a laminated material comprising a support material layer and at least one heat-sealable thermoplastic layer, which package is provided with a pouring opening and a closure strip which is applied over the pouring opening.

On packages of disposable character manufactured of sealable laminate material already on the market the opening devices were brought about on the one hand by tearing indications in the form of a perforation of the packing material, on the other hand by punching out holes in the package.

The manufacture of the said packages becomes relatively complicated, since the packing material has to be made tight after it has been perforated or holes have been punched into the same. This'tightening can be carried out in that after the perforation the packing material is lined with plastic on the inside or, if holes have been punched into the packing material, the holes are covered with plastic strips on the inside and possibly packages mentioned above is that it is not possible toproduce a simple and tight closing of the package once it has been opened.

All these disadvantages are overcome by the application of a package in accordance with the present invention, which is characterized in that a closure strip is applied over the pouring hole so that the part of the strip which is in the region of the pouring opening is given a recessed position by means of thermoforming, the

main part of the recessed part extending past the inside edge of the pouring opening, and that the part of the closure strip which extends past the inside edge of the pouring opening has a cross-sectional area parallel to the pouring opening which is larger than the area of the pouring opening.

In the following will be described an embodiment of the invention with reference to the enclosed schematic drawing, in which FIG. 1 shows the upper part of the package with a closure strip applied thereto,

FIG. 2 shows a section through the closure strip and the package wall, and

FIG. 3 shows an example of the anchoring of the closure strip.

The package in accordance with the invention may consist appropriately, as is shown in FIG. 1, of a number of plane wall sections 1. In one of these plane wall sections, preferably the top one, a pouring opening 5 is provided, and over the pouring opening 5 and the region around the same a closure strip 2 is applied, the

recess 3 of which extends past the inside edge 4 of the pouring opening 5.

The walls of the package may consist appropriately of a laminated material containing a support material of e.g. paper or foamed polystyrene and a homogeneous, thermoplastic material, e.g. homogeneous polystyrene, coated on at least one side of the support material.

Into one of the walls of the package a pouring opening is punched which is given such a shape that the contents of the package can be emptied out in a well collected, straight forwards directed jet. Over and around' the pouring opening a closure strip of a formable, appropriately thermoformable material, eg polystyrene, is provided. So as to obtain a tight closure between the package and the closure strip "the closure strip has to be manufactured of a material which is adapted so that it can be sealed againstthe outside layer of the package wall. In this case, if polystyrene is used as a coating material on the supportmaterial, the closure strip must also be made of polystyrene.

The said closure strip can be applied and formed on the package either in connection with the forming of the package or after the package has been filled with the intended contents. The application and forming of the closure strip takes place so that the strip is applied over the pouring opening, whereupon a recessed form is imparted to the strip in the region of the pouring opening. This recessed form can be produced either by forming the closure strip by means of a pressing tool after heating, or by forming a pressure difference between the two sides of the strip, the higher pressure acting against the outside of the packing strip. This pressure difference is achieved in that air is evacuated from the side of the packing material which is intended to form the inside of the package, or at least from the region nearest the edge of the pouring opening. The said pressure difference can also be obtained, in that the pressure is increased on the side of the packing material which is intended to form the outside of the package. If the closure strip is formed in connection with the formation of the package it is appropriate to apply, at the instant of forming, a plate under the pouring opening, in order to prevent that the recess of the closure strip extends too far into the package. It is desirable that the part of the closure strip which extends into the package should have a relatively plane shape at the same time as extending past the inside edge of the pouring opening. If the closure strip is manufactured of a thermoformable material it is appropriate to apply the pressure difference only after the part of the strip, which is in the region of the pouring opening, has been warmed up to formable consistency. The pressure difference between the two sides of the closure strip is to be adjusted to such a size, that the strip forms a recessed part 3 which extends past the inside edge 4 of the opening hole, and so that the cross-sectional area of the recessed part which is formed under the inside edge of the pouring opening is larger than the area of the pouring opening.

In order to obtain a grip lug, some of the outer edges of the closure strip have a part which is not sealed to the package. In the embodiment which is shown in FIG. 1 the closure strip is folded down over the edge 7 of the package and the folded down part is not sealed to the wall of the package 1. If it is desired to lay open the pouring opening, the grip lug is seized and the closure strip is removed. I

In the case where the closure strip has been scaled to the outer layer of the laminated material of the package, the removal and splitting of the outer layer of the laminated material can take place in the area of the pouring opening, and the closure strip is anchored in the thermoplastic layer of the packing material so that the closure strip remains at hand for re-closing.

Another embodiment, comprising an anchoring of 5 the closure strip in the thermoplastic layer of the packing material after the opening of the package, consists in that a region in the direct vicinity of any one of the edges of the closure strip is folded over 180 and sealed in the region of the pouring opening at the same time as the forming of the closure strip takes place as described above. If this method of folding the closure strip over 180 is applied, it is appropriate to punch a score in the outer homogeneous plastic layer between the pouring opening and the folded over part of the closure strip. The said score prevents the splitting of the outer plastic layer from extending past the folded over part.

By virtue of the cross-sectional area of the recessed part of the closure strip parallel to the wall of the package, wherein the pouring opening is situated, being larger than the area of the pouring opening, it is possible to re-obtain a relatively tight closure after the package has been opened. The recessed part 3 of the closure strip is applied on re-closure to the pouring opening, and by a slight pressure the said part 3 is slightly deformed, so that it is given temporarily the same crosssectional areas as that of the pouring opening, which makes it possible for this part of the closure strip to pass through the pouring opening. After passing through the pouring opening this recessed part resumes its original shape and forms a tight closure against the wall of the package which is in the region of the pouring opening.

I claim:

1. A disposable package comprising a container body formed of a laminated material having a support layer and an outer layer of heat sealable thermoplastic material thereon and having a flat top panel provided with a pouring opening therein, a closure strip covering said opening, at least a portion of said closure strip being sealed to the outer layer of the top panel in the area surrounding said opening, that portion of said strip which covers said opening being recessed into said opening, said recessed portion extending into said container body beyond the inner surface of said top panel and having a surface parallel to the inner surface of said top panel and an area larger than that of said opening to releasably engage the periphery of said opening and secure the recessed portion of said strip within said opening, a portion of the closure strip remote from said opening being folded under through 180 and sealed to the outer layer of said top panel, said outer layer being scored beneath said closure strip between the pouring opening and the portion of said strip which is folded under to resist tearing, when said package is opened, of the outer layer where the folded portion of said closure strip is sealed to said outer layer.

2. A disposable package as defined in claim 1 wherein at least a part of said closure strip surrounding said opening is not sealed to the outer surface of said top panel.

3. A disposable package as claimed in claim I wherein the laminated material comprises a support layer of foamed plastic material and layers of homogeneous plastic material on both sides thereof.

4. A disposable package as claimed in claim 3 wherein said support layer is composed of foamed polystyrene and the outer layers are composed of homoge-' wherein said closure strip is composed of polystyrene.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1520527 *Nov 25, 1921Dec 23, 1924Nat Paper Can CompanyContainer
US2153911 *Oct 18, 1937Apr 11, 1939Felix BenedettiContainer
US2309144 *Sep 16, 1939Jan 26, 1943American Can CoContainer
US2784892 *Dec 23, 1953Mar 12, 1957American Can CoDispensing top closure assembly and method of attaching same to a container
US2983962 *Mar 15, 1960May 16, 1961Monsanto ChemicalsMethod for preparing laminated resin foam structures
US3039669 *Nov 20, 1961Jun 19, 1962Hill Howard MDispensing container and blank
US3213071 *Nov 16, 1959Oct 19, 1965Phillips Petroleum CoFoamed olefin polymer process
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3977591 *Jun 16, 1975Aug 31, 1976Ab ZiristorCover strip for the pouring opening in a packing container
US4019675 *Oct 21, 1975Apr 26, 1977Ab Akerlund & RausingLocking container
US4109566 *Apr 15, 1975Aug 29, 1978Electro-Food AbFood container having electrode pockets
US4223789 *Dec 21, 1978Sep 23, 1980Tetra Pack Developpement S.A.Opening means for a packaging means of flexible material
US4557398 *Aug 17, 1984Dec 10, 1985International Paper CompanyEnd closure structure for a container
US4705197 *Jul 29, 1986Nov 10, 1987International Paper CompanyPour spout for containers
US4715528 *Sep 9, 1986Dec 29, 1987Tetra Pak International AbReclosable opening arrangement on a packing container
US4730769 *Apr 11, 1986Mar 15, 1988Tetra Pak International AbPackaging for liquids and process and apparatus for its manufacture
US4775098 *Dec 11, 1987Oct 4, 1988Adolph Coors CompanyCarton with a reclosable pour opening
US4782646 *Apr 16, 1987Nov 8, 1988Ab Tetra PakMethod and an arrangement for the finishing of an opening arrangement on a packing container
US4792069 *Oct 9, 1987Dec 20, 1988Tetra Pak International AbPouring edge on packing containers
US4819839 *Mar 6, 1985Apr 11, 1989Tetra Pak International AbOpening arrangement on packing containers
US4852764 *Aug 22, 1988Aug 1, 1989Packaging Corporation Of AmericaPour spout closure
US4887765 *Oct 26, 1988Dec 19, 1989Tetra Pak Finance & Trading S.A.Fluid pack and process for the production thereof
US5067614 *Feb 22, 1990Nov 26, 1991Tetra Pak Holdings S.A.Packing container provided with opening arrangement
US5098365 *Dec 14, 1989Mar 24, 1992Ab ProforMethod of connecting a gripping device to sheet or web-formed packaging material
US5551629 *Dec 8, 1994Sep 3, 1996The Procter & Gamble CompanyGranular substance storing and dispensing container
US5938107 *Oct 29, 1996Aug 17, 1999Tetra Laval Holdings & Finance S.A.For liquid products
US6131804 *Feb 23, 1999Oct 17, 2000Rexam Plastics Inc.Reclosable fitment with pull off liner film
US6349866Nov 10, 1999Feb 26, 2002Stone Container CorporationPaperboard can with an integrated paperboard lid having a hinge on the lid
US6454161Sep 23, 1997Sep 24, 2002Tetra Laval Holdings & Finance SaOpening device on a packaging sheet material
US6471122Jun 2, 2000Oct 29, 2002Stone Container CorporationPaperboard can with an integrated paperboard lid having a slide closure
US6820764May 29, 2002Nov 23, 2004Tetra Laval Holdings & 'finance SaClosable opening device for sealed packages of pourable food products
US7135088Jan 21, 2004Nov 14, 2006Tetra Laval Holdings & Finance S.A.Method of producing packaging material in the form of a continuous laminate web
US7191931Mar 7, 2003Mar 20, 2007Tetra Laval Holdings & Finance S.A.Opening arrangement, packaging and method of providing a packaging with an opening arrangement
US7484641Sep 8, 2003Feb 3, 2009Tetra Laval Holdings & Finance S.A.Closable opening device for packages of pourable food products
DE19544601A1 *Nov 30, 1995Jun 5, 1997Tetra Laval Holdings & FinancePacket for free-flowing contents, with pourer and closure piece on hole in top
EP0190577A2 *Jan 17, 1986Aug 13, 1986AB Tetra PakPackage for liquids with a spout
EP0236556A2 *Nov 15, 1986Sep 16, 1987Tetra Alfa Holdings S.A.Liquid package and method of producing the same
Classifications
U.S. Classification229/125.9, 229/123.1, 428/43
International ClassificationB65D77/34, B65D77/22, B65D77/10, B65D5/70, B65D47/36, B65D77/30, B65D47/00
Cooperative ClassificationB65D5/708
European ClassificationB65D5/70E
Legal Events
DateCodeEventDescription
Mar 6, 1989ASAssignment
Owner name: AKTIEBOLAGET TETRA PAK
Free format text: CHANGE OF NAME;ASSIGNOR:TETRA PAK INTERNATIONAL AKTIEBOLAG;REEL/FRAME:005150/0367
Effective date: 19870831