US3456861A - Package comprising a thin bag and a double-folded stiffening inserted into the body of the bag,and the procedure for the production of this package - Google Patents

Package comprising a thin bag and a double-folded stiffening inserted into the body of the bag,and the procedure for the production of this package Download PDF

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Publication number
US3456861A
US3456861A US678259A US3456861DA US3456861A US 3456861 A US3456861 A US 3456861A US 678259 A US678259 A US 678259A US 3456861D A US3456861D A US 3456861DA US 3456861 A US3456861 A US 3456861A
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US
United States
Prior art keywords
bag
package
folded
procedure
cantilevers
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.)
Expired - Lifetime
Application number
US678259A
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English (en)
Inventor
Lars Malte Roland Wettlen
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.)
Tetra Pak AB
Original Assignee
Tetra Pak AB
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Filing date
Publication date
Application filed by Tetra Pak AB filed Critical Tetra Pak AB
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Publication of US3456861A publication Critical patent/US3456861A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B5/00—Packaging individual articles in containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, jars
    • B65B5/04—Packaging single articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B39/00—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers
    • B65B39/007—Guides or funnels for introducing articles into containers or wrappers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
    • B65D5/06—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end-closing or contents-supporting elements formed by folding inwardly a wall extending from, and continuously around, an end of the tubular body
    • B65D5/067—Gable-top containers
    • B65D5/068—Gable-top containers with supplemental means facilitating the opening, e.g. tear lines, tear tabs

Definitions

  • a package made from a tube of thin flexible material and having transversely extending end seals includes a tucked-in portion adjacent one corner portion of one of the sealed ends and in which none of the four walls of the bag developed at the tuck are sealed to one another.
  • a W-shaped stiffening member has its central wedge-shaped portion inserted into the tuck and the four surface parts of the W are adhered respectively to the four wall portions of the bag defining the tuck.
  • the bag is opened automatically at the corner portion where the tuck is located by spreading apart the W-shaped stiffening member and the walls of the tuck which thereby results in a progressive rupture of the end seal from the package corner.
  • the W-shaped stiffening member is incorporated in the walls which form the gable top end of an outer container in which the bag is placed.
  • the present invention relates to packaging technology and is concerned with a package comprising a bag of thin, flexible material filled with a liquid, and a doublefolded stiffening structure that is inserted into a tuck in the bag immediately below a boundary line of the bag, and which in a section at right angles to the vertical axis of the upright sealed package has the shape of a compressed W in the area of the said fold.
  • the stiffening consists of a part of an outer container for the bag which has an upper edge zone that has been concertina-folded and flattened to form a fin, the inner bag in the Concertina-folded condition being sealed along a narrow sealing zone situated outside the said fin formed by the edge zone of the outer container.
  • the edge zone of the container that forms the fin is then torn along a continuous or partly perforated tear line which extends around the circumference of the edge zone along practically the whole of one of the edge-zone areas that has been concertina folded.
  • the purpose of this is to enable the package to be opened by parts of the fin being separated from the outer container, by being torn along the tear line incorporated in the fin, during which operation the bag inside the container is also torn open along an area behind its seal, and to make it possible for the concertina fold exposed as a result of the tearing-open operation to be opened out to form a spout with a largely rhomboidal section.
  • the present invention has many features in common with this earlier proposal.
  • the present invention is also applicable to packages of the strip-top type, also known as a gable top, which have many advantages.
  • the new design however differs from the old one in that it can be opened much more easily. There is thus no need, as was earlier the case, to tear through a number of layers of plastic foil in order to open the package.
  • the inner 3,456,861 Patented July 22, 1969 "ice bag is instead opened up in a way that is usual when striptop packages are opened.
  • the invention is characterized by the said W configured stitfening being fixed to the wall of the bag in the area of the central wedge-shaped portion of the said W that has been pressed into the bag, while portions of the wall of the bag are not in any part of the said W fixed to one another, by virtue of which fact the bag can be opened up in the said boundary line by tearing open the said stiffening, and a spout formed by the stiffening and 'at the same time also the portion of the wall of the bag afiixed to the stiffening, being opened outwards.
  • the invention also relates to a method for producing the package.
  • a method of producing packages of the kind specified in the introduction has been proposed before, which is characterized by a hose made of a flexible plastic foil capable of being heat-sealed and sealed at its lower end being, inter alia, filled with a liquid at the same time as the lower portion of the hose is inserted into an outer gable top container of some still?
  • the procedure is thustcharacterized by at least one finger-shaped device being driven against the vertical axis of the bag which is preferably hanging vertically, immediately below the upper boundary line of the bag, so that one of the upper corners of the bag is pushed inwards and a part of the boundary line is folded round the remainder of the boundary line, so as to form a tuck in the bag; by the bag, with the finger still in position inside the body of the filled bag, being made to perform a vertical motion in relation to the said stilfening, which is at the same time made to enter the tuck in the bag which has been formed by the finger; and by the finger being withdrawn from the tuck in the bag, after the stiffening has been made to enter the tuck or at the same time as this is done, the bag being transferred from the finger to the stiffening and being suspended from this.
  • FIG. 1 illustrates an initial stage of the operation in accordance with the invention
  • FIG. 2 shows a later stage, namely that in which the filled bag has been separated from the hose and two finger or cantilever-shaped units have been pressed into the body of the bag, and are lowering it,
  • FIG. 3 shows how the bag, suspended on the cantilevers, is inserted into a container
  • FIG. 4 shows how the cantilevers press inwards the said stiffening, which as a result is inserted into the tuck in the bag formed by the cantilevers
  • FIG. 5 illustrates how the finished package can be opened (initial stage) and how the inner bag is thereby opened up
  • FIG. 6 shows the continuation of the opening operation
  • FIG. 7 shows finally the opened package.
  • FIG. 1 in FIG. 1 denotes generally a hose which to a level 3 is filled with liquid 2.
  • the hose consists of a polyethylene foil which is capable of being heat sealed.
  • a cushion-shaped, completely colsed and filled bag 7 is separated from the remainder of the hose 1 by a straight sealing zone 5.
  • the upper corners of the bag have been denoted 5' and 5".
  • a similar sealing zone 4 seals off the remainder of the hose at its lower end.
  • Bag 7 is, in a similar manner, sealed off at its lower end by means of a straight sealing zone 6. Bag 7 can be separated from the remainder of the hose 1 by a out between zones 4 and 5.
  • the equipment by which this separation is effected is not shown in the figure, since this is not considered necessary for the understanding of the principles of the present invention.
  • the liquid 2 is poured in from above hose 1 before this is formed into the shape of a hose by folding from a plane sheet.
  • Bag 7 is surrounded by four sheets or flaps 8, 9, 10 and 11, which in the position shown in FIG. 1 press against the side walls of the bag, so that these are tensioned and so that the body of the bag is somewhat flattened. Both lower sheets 10 and 11 can be rotated in the way indicated in the figure, and all sheets are capable of accompanying the bag in its vertical movement which will be described in the following. It is best to use for this purpose an endless chain, not shown here, which is operated synchronously with the equipment that feeds downwards the hose 1.
  • cantilevers To finger or cantilever-shaped units (hereafter called cantilevers), whose operation is of primary importance for the procedure in accordance with the invention, are denoted 40 and 41.
  • the cantilevers can be moved in both the horizontal and vertical direction and are for this purpose mounted on a frame not shown here. They further consist, as far as those parts that are shown in the figure are concerned, of plane, comparatively thin but not sharp sheets of metal. At their ends they have edges 42 inclined upwards in a way whose principles are shown in the figures.
  • a sleeve 12 of comparatively stiff material preferably cardboard.
  • Sleeve 12 has a square cross section and its sides have in FIG. 1 been denoted 13, 14 and (hidden) 15 and 16.
  • the base flaps have been denoted 17, 18, 19 and (hidden) 20.
  • the top of the sleeve is to form a strip-top by means of a concertina-fold construction.
  • the concertinafold areas which may be seen in FIG. 1 have been denoted 25, 26, 27 and are separated from one another by fold lines 23 and 24.
  • the rib-shaped portions above the concertina-fold areas have been denoted 28 and 30 and their upper edges 29 and 31 respectively.
  • a hopper 43 is placed above sleeve 12, the lower end of which largely corresponds to the cross-sectional area of the sleeve.
  • the hopper has two slots 44 and 45 respectively, to receive cantilevers 40 and 41.
  • the next stage in the operation is introduced by bag 7 being completely released from the grip of the sealing blocks.
  • Bag 7, suspended freely from cantilevers 40 and 41 is now lowered toward sleeve 12, FIG. 1, and also loses contact with flaps 8-11 at the same time.
  • Hopper 43 guides the bag down into the sleeve 12, and at the completion of this stage cantilevers 40 and 41 glide down through slots 44 and 45.
  • the stage can be considered to be over when the cantilevers have come into contact with the upper edges 29 and 31 of ribs 28 and 30, respectively, FIG. 3.
  • Ribs 28 and 30 will hereby assume the supporting role of the cantilevers, namely bag 7 will now be suspended from the ribs. Ribs 32, 33 and 34, 35 will finally be driven towards one another with the aid of a pair of blocks not shown in the figures, during the operation in which the double folded sealing zone 5 and the bag material immediately below this are pressed together.
  • an adhesive has previously been applied to the insides of ribs 32, 33 and 34, 35, the concertina-fold configuration is fixed in the position it has been made to assume.
  • the insides of tucks 50 and 51 are aflixed to the inside of rib 28.
  • the adhesive may for instance be of the kind that is activated by the application of heat.
  • the adhesive be activated before the bag is inserted into sleeve 12.
  • an adhesive that can be activated at a temperature below that of the softening point of the polyethylene may be chosen, and in this way the adhesive may be activated even after the bag has been inserted into the sleeve.
  • base flaps 17-20 are also folded up and sealed, but this operation will not further be described here.
  • the package is opened in the way that is a characteristic feature of strip-top packages, by using the thumb and forefinger to fold outwards the concertina-fold areas 25 and 27 and then pressing together the edges that have been opened out. It is however a characteristic feature of the present invention that the-inner bag held inside the stiff outer sleeve is opened up when the concertina folds are folded outwards.
  • FIG. 5 thus shows the beginning of the opening operation.
  • the sealing zone 5 of bag 7 is opened up as a result of a simultaneously tearing-open of portion 5b, FIG.2, and of that portion of 5a which is situated next to this portion, beginning at the point at which the said portions 5a and 5b are joined.
  • the force of the pull owing to the pressure of the stiffening rib 28, can be concentrated right onto the sealing zone which may be weakened somewhat in advance so that it may be torn open more easily.
  • the way in which this weakening may be carried out has not been shown in any of the figures, but may possibly be carried out in conjunction with the separation from the remainder of the hose 1 of bag 7, some piece of equipment flattening out from above the newly-formed sealing zone 5, or in some other way weakening it.
  • FIG. 6 This figure illustrates how the opened-up sealing zone is exposed above the upper edge 29 of rib 28. It is thus possible to see the portion 5b of the sealing zone that has been folded under, immediately above the edge 29, and one-half of portion 5a above this.
  • the package can now be completely opened by concertina folds 25, 26 and 27 being folded forward in the conventional way.
  • walls 52 and 54, FIG. 2 are attached to the inside of rib 28, portion 5b of the sealing zone will be opened out as rib 28 is folded outwards, FIG. 7.
  • a package comprising a bag made from a tube of thin flexible material and which is provided with a transverse seal across one end thereof subsequent to being filled, said package including a tucked-in portion adjacent one corner portion of the sealed end and wherein none of the four wall portions of the bag developed at the tucked-in portion are sealed to one another, and a W- shaped stiffening member having its central wedge-shaped portion inserted into said tucked-in portion of said bag, said four wall portions of said bag developed at the tucked-in portion thereof being adhered to the four corresponding surface portions of said W-shaped stiffening member respectively in contact therewith, and said package being openable by a spreading apart of the W-shaped stiffening member and walls which form said tucked-in portion which results in a rupture of the appertaining portion of the end seal.
  • the method of making a package including an inner bag of thin flexible plastic material and an outer rectangular cardboard container having a gable top which comprises the steps of forming longitudinally spaced transverse seals across a vertically disposed tube of said flexible material to establish the inner bag, tucking in both corner portions of the upper transversely sealed end of the bag below the seal where none of the four wall portions of the bag developed at each tucked-in portion are sealed to one another, lowering said bag into said outer cardboard container through the open gable top thereof, the wall portions of said container from which the gable top is formed establishing W-shaped stiffening members correlated respectively to each of the tucked in portions of said inner bag, folding the gable top walls inwardly so as to enter the center walls of the W-shaped stiffener member into the tucked-in portions of the bag, and sealing confronting and transversely extending end portions of the gable top to the upper transverse seal of the bag.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Bag Frames (AREA)
US678259A 1966-11-03 1967-10-26 Package comprising a thin bag and a double-folded stiffening inserted into the body of the bag,and the procedure for the production of this package Expired - Lifetime US3456861A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE15062/66A SE359508B (de) 1966-11-03 1966-11-03

Publications (1)

Publication Number Publication Date
US3456861A true US3456861A (en) 1969-07-22

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US678259A Expired - Lifetime US3456861A (en) 1966-11-03 1967-10-26 Package comprising a thin bag and a double-folded stiffening inserted into the body of the bag,and the procedure for the production of this package

Country Status (9)

Country Link
US (1) US3456861A (de)
CH (1) CH481795A (de)
DE (1) DE1586460B1 (de)
DK (1) DK116985B (de)
ES (1) ES346740A1 (de)
FR (1) FR1551109A (de)
GB (1) GB1191295A (de)
NL (1) NL160219B (de)
SE (1) SE359508B (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2351189A1 (de) * 1972-10-17 1974-04-25 Tetra Pak Rausing & Co Kg Verpackung fuer unter druck stehende gueter
US3983682A (en) * 1974-11-27 1976-10-05 Pneumatic Scale Corporation Apparatus for forming, filling and inserting filled bags into cartons
US4099665A (en) * 1977-02-22 1978-07-11 The Bergstein Packaging Trust Reclosable carton with tapered top closure
US4174598A (en) * 1978-05-24 1979-11-20 Patrick Joseph Shepherd Method for making a packaged gel refrigerant
US4355493A (en) * 1980-06-17 1982-10-26 Scholle Corporation Roller chute
US4636391A (en) * 1985-08-22 1987-01-13 Patrick J. Furlong Apparatus and method of forming a sterile product package
US4891929A (en) * 1985-08-13 1990-01-09 Italpack S.P.A. Method for the production of prismatic containers with plane gable surfaces without any lateral ears
US20040187445A1 (en) * 2003-03-28 2004-09-30 Hildebrand John Joseph Gripping arm assembly for loading a filled inner container into an outer container
US20130047555A1 (en) * 2008-12-22 2013-02-28 Coating Excellence International Llc Heat activated adhesives for bag closures
US8720769B2 (en) 2009-09-15 2014-05-13 Packaging Corporation Of America Beverage container
US10919680B1 (en) 2018-10-08 2021-02-16 Packaging Corporation Of America Liquid beverage container
US10981710B1 (en) 2019-08-30 2021-04-20 American RX Group, LLC Take-back liner and take-back kit therefrom
US11952211B1 (en) 2019-08-30 2024-04-09 American RX Group, LLC Take-back kiosk

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE398483B (sv) * 1975-10-28 1977-12-27 Ziristor Ab Forpackning for flytande, foretredesvis trycksatt fyllgods
DE2637794A1 (de) * 1976-08-21 1978-02-23 Pneumatic Scale Corp Verfahren und vorrichtung zum herstellen und fuellen von beuteln sowie zu deren verpackung in kartons
CA1152425A (en) * 1979-06-20 1983-08-23 John W. Scully Apparatus for forming, filling and depositing filled bags into cartons
US4571926A (en) * 1979-06-22 1986-02-25 Pneumatic Scale Corporation Apparatus for forming, filling and depositing filled bags into cartons
DE4006305A1 (de) * 1990-02-28 1991-08-29 Edelmann Carl Gmbh Verfahren zum herstellen einer mit einem kunststoffinnenbeutel versehenen kartonverpackung fuer die aufnahme schuettfaehiger gueter
CA3129565C (en) * 2012-10-26 2024-03-12 Primapak, Llc Flexible package and method of making the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2214944A (en) * 1935-07-08 1940-09-17 Owens Illinois Glass Co Package of liquid or plastic material
GB965078A (en) * 1959-09-08 1964-07-29 Robinson E S & A Ltd Improvements in lined cartons
US3215330A (en) * 1962-08-16 1965-11-02 Metal Box Co Ltd Containers

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL290718A (de) * 1962-03-28

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2214944A (en) * 1935-07-08 1940-09-17 Owens Illinois Glass Co Package of liquid or plastic material
GB965078A (en) * 1959-09-08 1964-07-29 Robinson E S & A Ltd Improvements in lined cartons
US3215330A (en) * 1962-08-16 1965-11-02 Metal Box Co Ltd Containers

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2351189A1 (de) * 1972-10-17 1974-04-25 Tetra Pak Rausing & Co Kg Verpackung fuer unter druck stehende gueter
US3983682A (en) * 1974-11-27 1976-10-05 Pneumatic Scale Corporation Apparatus for forming, filling and inserting filled bags into cartons
US4099665A (en) * 1977-02-22 1978-07-11 The Bergstein Packaging Trust Reclosable carton with tapered top closure
US4174598A (en) * 1978-05-24 1979-11-20 Patrick Joseph Shepherd Method for making a packaged gel refrigerant
US4355493A (en) * 1980-06-17 1982-10-26 Scholle Corporation Roller chute
US4891929A (en) * 1985-08-13 1990-01-09 Italpack S.P.A. Method for the production of prismatic containers with plane gable surfaces without any lateral ears
US4636391A (en) * 1985-08-22 1987-01-13 Patrick J. Furlong Apparatus and method of forming a sterile product package
US20040187445A1 (en) * 2003-03-28 2004-09-30 Hildebrand John Joseph Gripping arm assembly for loading a filled inner container into an outer container
WO2004094273A2 (en) * 2003-03-28 2004-11-04 Scholle Corporation A gripping arm assembly for loading a filled inner container into an outer container
WO2004094273A3 (en) * 2003-03-28 2005-06-02 Scholle Corp A gripping arm assembly for loading a filled inner container into an outer container
US20130047555A1 (en) * 2008-12-22 2013-02-28 Coating Excellence International Llc Heat activated adhesives for bag closures
US8720769B2 (en) 2009-09-15 2014-05-13 Packaging Corporation Of America Beverage container
US10919680B1 (en) 2018-10-08 2021-02-16 Packaging Corporation Of America Liquid beverage container
US10981710B1 (en) 2019-08-30 2021-04-20 American RX Group, LLC Take-back liner and take-back kit therefrom
US11952211B1 (en) 2019-08-30 2024-04-09 American RX Group, LLC Take-back kiosk

Also Published As

Publication number Publication date
GB1191295A (en) 1970-05-13
SE359508B (de) 1973-09-03
CH481795A (de) 1969-11-30
FR1551109A (de) 1968-12-27
ES346740A1 (es) 1969-03-16
NL6715000A (de) 1968-05-06
DE1586460B1 (de) 1971-04-22
DK116985B (da) 1970-03-02
NL160219B (nl) 1979-05-15

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