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Publication numberUS3347444 A
Publication typeGrant
Publication dateOct 17, 1967
Filing dateJan 3, 1966
Priority dateJan 29, 1965
Also published asDE1298929B
Publication numberUS 3347444 A, US 3347444A, US-A-3347444, US3347444 A, US3347444A
InventorsAnders Rausing Gad, Georg Swede Harald
Original AssigneeTetra Pak Ab
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Package having an oblique opening indication
US 3347444 A
Abstract  available in
Images(4)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Oct. 17, 1967 A} RAUSING ETAI- 3,347,44

PACKAGE HAVING AN OBLIQUBOPENING INDICATION Filed Jan. 3, 1966 4 Sheets-Sheet 1 Oct. 17,1967 RAUS'NG ETAL 3,347,444 PACKAGE HAVING AN OBLIQUE OPENING INDICATIQN Filed Jan. 3, 1966 4 Sheets-Sheet 2 Oct. 17, 1967 3,34 7,444 PACKAGE HAVING AN 'OBLIQUE OPENING INDICATION 66 G. A. RAUSING ETAL 4 Sheets-Sheet 5 Filed Jan. 5, l9

Oct. 17, 1967 G. RAUSING ETAL 3,347,444

PACKAGE HAVING AN QBLIQUE OPENING INDICATION Filed Jan. 5, 1966 4 Sheets-Sheet 4 United States Patent Filed Jan. 3, 1966, Ser. No. Claims priority, application Switzerland, Jan. 29, 1965, 1,255/ 65 4 Claims. (Cl. 229-17) ABSTRACT OF THE DISCLOSURE The present invention refers to a package of flexible, relatively stiff web material which has been formed into a tube and closed by fiat pressing and transverse sealing in transverse narrow zones for forming individual packages which have thereupon been separated by cuts in said sealing zones, one end of the package having been compressed so as to form a fiat, preferably rectangular end wall, from which two substantially triangular flaps project, said flaps having been folded against the adjacent package side walls and being traversed by a closing fin formed by the transverse sealing one of said flaps being provided with a tear-up indication to facilitate removal of a portion of said closing fin therefrom and thereby to provide a pouring opening.

In the working required to convert a package blank made from a tube by successive transverse seals into a package having for example a parallelepipedic shape, the above-mentioned, substantially rectangular, double-walled corner flaps are formed from the excess material which on account of geometrical conditions cannot be fitted into the parallelepipedic shape.

Packages of the kind here mentioned, which are preferably used for liquid filling material, are with advantage produced from packaging material which has been coated with a thermoplastic material, for example polyethylene, elwax, wax or lacquer, which on the one hand is liquidtight in itself, on the other hand allows producing of liquid-tight seals which may be produced in a simple and cheap way by pressing two sandwiched material surfaces provided with a thermoplastic coating against each other with simultaneous supply of heat, the coatings turned towards each other fusing along the Zones subjected to pressure and heat. If, for some reason, it should be considered more advantageous to glue together the sealing joints, this is of course also possible.

Further advantages of a package of the kind considered are that it may be produced continuously in a rational way starting from a flat web of material which is formed into a tube which is thereupon filled, divided up and closed by successive transverse seals, detached and finally converted into individual packages units of the desired form.

Packages of the kind defined above are previously known per se, and the triangular flap corners formed in manufacturing the package have generally been folded in towards and fixed to the top of the package to reduce the pile volume required for each individual package. F urthermore, it is well-known to use one of the flap corners formed as an emptying opening for the package.

The present invention aims at providing an emptying opening which is easy to open and which also alfords essential advantages in respect of manufacturing procedure, the package according to the invention being characterized by a tear-up indication running near the base line of the above-mentioned sealing fin at an angle in a top end wall 2 and a bottom 3,347,444 Patented Oct. 17, 1967 relation to this line across one of the said triangular flaps, said tear-up indication facilitating the tearing-up of the portion of the fin running across said flap to form an emptying opening, part of the material of the flap proper being also remove This tear-up indication, which preferably consists of perforations passing only partly through the material, may be given various forms, which may most simply be described with reference to the form it occupies in a flatly developed web of material. The most simple form is the V-form, the apex of the V in the finished package having to be situated on the underside of the triangular flap, while the free leg ends of the V at the same time have to be near the base line of the sealing fin, preferably some distance inwards on the package proper. Alternatively the W-form may be used. The tear-up indication may also consist of curved perforations. Experiments have shown that the curvature may be adjusted so that the flap with the tear-up indication, after tearing-off the end portion of the fin with or without the help of crease lines, has a strong tendency to raise itself and form a natural emptying spout. The curvaure will then be dependent on the position of crease lines possibly provided near the tear-up indication. Also in the case of curved perforations it has, however, been found suitable generally to follow the above-mentioned V- or W-forrns, respectively. For example, U-form may be suitable.

By the circumstance that in addition to part of the sealing fin part of the material of the flap proper is also removed, the advantage is gained that the shape of the emptying opening may be chosen arbitrarily. In the most common case, namely that of the tear-up indication being provided in the web of material before this is converted into a tube, the additional advantages is gained that thanks to the oblique disposition of the indication in relation to the transverse direction of the web the risk of breakage in the web at the turning thereof over turning rolls or at the forming of said web is reduced.

A further advantage is that the perforation may be carried out continuously in a running web of material, so that the cutting forces need not be applied at one time for the whole indication, which, however, would be necessary if the indication were formed by a straight perforation running in the transverse direction of the web.

The invention will be described more closely in the following with reference to the accompanying drawings, which by way of example illustrate two different embodiments of the invention:

FIG. 1 shows a closed package in which the opening indication consists of a perforation of V-form in the flat condition of the packaging material,

FIG. 2 shows the same package after being opened by tearing away the part of the sealing fin running across the opening flap,

FIG. 3 finally shows a closed package in which the opening indication consists of a perforation of W-form in the flat condition of the packaging material,

FIG. 4 is a partial plan view of the blank showing the location of the perforations in the completed package as depicted in FIG. 1, and

FIG. 5 is a partial plan view of the blank showing the location of the perforations in the completed package as depicted in FIG. 3.

The package shown in FIG. 1 consists of side walls 1,

part not shown. The package has been made from a flexible, relatively stiff web material which has been formed into a tube and closed by fiat-pressing and transverse sealing at transverse narrow zones, whereby a sealing fin 3 later folded down against the top end wall 2 of the package has been formed. When the package was given its parallelpipedic form, shown, four triangular double-walled flaps 4 were being formed.

Three of said flaps have been folded in against the bottom and the remote side wall, respectively, so that only one such flap is visible in the figure. This shown corner flap 4 is folded around the straight side wall edge 6 and fixed by means of an easily breakable bond to the side wall 1 associated with the edge 6. The sealing fin 3 extends across both the flap 4, the end wall 2 and the folded down flap, not shown, at the opposite side of this end wall. The package, shown as an example, is furthermore provided with creases 5 which extend from the ends of the side wall edge 6 across the end wall 2 to an intersection point at the base line 7 of the sealing fin 3.

For facilitating the opening of the package it is provided with a tear-up indication consisting of straight perforation lines 8 which penetrate the material only partially and which, starting from a common point a, situated on the inside of the flap 4 on the base line 7 of the fin 3, run through symmetrical points 12 on the free side edges of the flap and terminate at a point 0 at the base line 7 some distance from the flap 4. The tear-up indication described is produced most simply by stamping a V-shaped perforation in the web of material, before said web is converted into tube form.

In FIG. 2 the package according to FIG. 1 is shown in opened condition, an emptying opening 9 having been formed by tearing-off the part of the sealing fin 3 running across the flap 4, together with a further small part of the fin, running partly across the end 2 as well as part of the material of the flap proper, i.e. the material between the tear-up indication 8 and the fin 3.

The package shown in FIG. 3 conforms entirely with that shown in FIGS. 1 and 2, and therefore the same reference numerals as in these figures have been used. The only difference is the form of the tear-up indication which has therefore been designated by 8 and which consists of two straight perforations which start from a common point a at the end of the base line 7 of the sealing fin 3, from where they run obliquely away from the base line up to symmetrical points b at the folding line 6 from where they again approach the base line 7 and each other to meet the base line 7 at the point 0. This tear-up indication is produced most simply by stamping a W-shaped perforation in the web of material, before said web is converted into tube form.

Naturally, the invention is not limited only to the embodiments described above but may be varied within the scope of the following claims. For example, the invention may also be applied to other packages than those set forth above by way of example. Furthermore, the form of the tear-up indication may be varied. Thus, as already mentioned, this may also be formed by curved perforation lines. In certain cases the creases 5 may be omitted altogether. In certain other cases it may instead be suitable to replace these creases with others adapted to the form of the tear-up indication used. If the tear-up indications perforations 8 8, 8 are extended in such a way that they cross the sealing fin 3 obliquely, the removing of the outer part of the double wall corner flap 4 is facilitated.

We claim:

1. A package, manufactured from a flexible, relatively stiff web material which has been formed into a tube and closed by fiat pressing and transverse scaling in transverse narrow zones for forming individual packages which have thereupon been separated by cuts in said sealing zones, one end of the package having been folded and compressed so as to form a fiat, rectangular end wall, from which two substantially triangular flaps project, said flaps having been folded down against the adjacent package side walls and being traversed by a closing fin formed by the transverse sealing, characterized by a tear-up indication 8 running from near the base line 7 of the fin 3 on the flap 4 obliquely in relation to this line and across to the edges of said flap 4, said tear-up indication facilitating the tearing-up of the portion of the fin 3 running across said flap 4 to form an emptying opening 9, part of the material of the flap 4 proper being also removed.

2. A package according to claim 1, characterized by the fact that the tear-up indication consists of straight perforations 8 which penetrate the material only partially and which, starting from a common point (a) situated on the side of the flap 4 turned towards the package and spaced from the base line 7 of the fin 3, run through symmetrical points (b) at the free side edges of the flap 4 and terminate near the base line 7, at a point (c) at some distance from the flap, said perforations 8 forming a V on a fiat web of material.

3. A package according to claim 1, characterized by the fact that the tear-up indication consists of straight which penetrate the material only partially and which, starting from a common point (a) near the end of the base line 7 of the fin 3, first diverge from the base line 7 to the fold line 6 and then again approach the base line 7 and terminate at (0') near the base line, these perforations 8' forming a W on a fiat web of material.

4. Package in accordance with claim 1, characterized that an essential part of the tearline 8 is arranged in the side of the flap 4 which is facing the side wall of the package.

References Cited UNITED STATES PATENTS 2/1966 Swede et a1. 229-17 10/1966 Lindh 229-17

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3232514 *Jan 14, 1964Feb 1, 1966Tepar AgFilled and sealed package
US3279678 *Jan 14, 1964Oct 18, 1966Lennartson Lindh ThorstenFilled and sealed package having reinforcing side panels
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3650458 *Oct 20, 1970Mar 21, 1972Tetra Pak IntOpening arrangement on packages
US3795359 *Nov 19, 1971Mar 5, 1974Tetra Pak IntParallellepipedic package
US3797726 *Jan 6, 1972Mar 19, 1974Altstaedter Verpack VertriebContainer for liquids with an openable pouring spout
US4126263 *Jun 21, 1977Nov 21, 1978Tetra Pak International AbPacking container provided with opening arrangement
US4248351 *Jun 20, 1978Feb 3, 1981Tetra Pak International AbPackaging container with a pouring spout
US4331288 *Aug 11, 1980May 25, 1982Tetra Pak International AbPacking container
US4655387 *Dec 13, 1985Apr 7, 1987Tetra Pak International AbPacking container provided with a sine curve tear-up opening arrangement
US4657175 *Mar 11, 1985Apr 14, 1987Tetra Pak International AbPackage
US4712690 *Jun 5, 1986Dec 15, 1987Pkl Papier-Und Kunststoff-Werke Linnich GmbhPackage having welded seam closure with hot melt thickening
US4771916 *Jun 8, 1983Sep 20, 1988Ocean Spray CorporationPivotal spout with cutter for dispensing liquids from multi-layered laminate containers
US4915236 *Jul 15, 1988Apr 10, 1990Pkl Verpackungssysteme GmbhCardboard and plastic composite parallelopipedal container for liquid
US5080233 *Nov 21, 1990Jan 14, 1992Minnesota Mining And Manufacturing CompanyGable top container having reduced opening force and method for construction therefor
US5601233 *Oct 18, 1995Feb 11, 1997Kao CorporationContainer
US5694746 *Dec 20, 1994Dec 9, 1997Chung; Yun H.Paperboard package and method for forming same
US6062470 *Apr 3, 1998May 16, 2000Sig Combibloc Inc.Tear-away package opening
US6227074Mar 16, 1998May 8, 2001Tetra Laval Holdings & Finance S.A.Method of manufacturing perforating tools
US6241646Feb 9, 1998Jun 5, 2001Sig Combibloc Inc.Tear-away container spout
US6419152Mar 27, 2000Jul 16, 2002Sig Combibloc Inc.Tear-away container top
US6446860 *Mar 6, 2000Sep 10, 2002Sig Combibloc, Inc.Tear-away package opening
US6631665Jun 9, 1999Oct 14, 2003Tetra Laval Holdings & Finance S.A.Perforating tools having plural blades
US6766941Jul 15, 2002Jul 27, 2004Sig Combibloc, Inc.Tear-away container top
USRE32891 *Jun 19, 1986Mar 21, 1989International Paper CompanyPouring spout opening configuration for a gable top of a container
EP0130666A2 *Apr 18, 1984Jan 9, 1985International Paper CompanyCarton with hinged opening flap and carton with perforated hinged opening flap
WO1998045175A2 *Apr 3, 1998Oct 15, 1998Sig Combibloc Inc.Tear-away package opening
WO1998045175A3 *Apr 3, 1998Dec 23, 1998Sig Combibloc IncTear-away package opening
WO2003063658A1Jan 6, 2003Aug 7, 2003Tetra Laval Holdings & Finance, SaSleeve and dispenser for brick-type package
WO2005110869A1 *May 17, 2005Nov 24, 2005Sealed Air (New Zealand)Improvements to packages and packaging methods
Classifications
U.S. Classification229/216, 229/140
International ClassificationB65D5/06, B65D5/02
Cooperative ClassificationB65D5/065
European ClassificationB65D5/06C1