EP0469562A1 - Verpackungsbehälter - Google Patents

Verpackungsbehälter Download PDF

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Publication number
EP0469562A1
EP0469562A1 EP91112823A EP91112823A EP0469562A1 EP 0469562 A1 EP0469562 A1 EP 0469562A1 EP 91112823 A EP91112823 A EP 91112823A EP 91112823 A EP91112823 A EP 91112823A EP 0469562 A1 EP0469562 A1 EP 0469562A1
Authority
EP
European Patent Office
Prior art keywords
panels
folding
main
sealing
panel
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Withdrawn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
EP91112823A
Other languages
English (en)
French (fr)
Inventor
LARS-GöRAN KARLSSON
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
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 Tetra Pak AB filed Critical Tetra Pak AB
Publication of EP0469562A1 publication Critical patent/EP0469562A1/de
Withdrawn legal-status Critical Current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
    • 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

  • the present invention relates to a paper packaging container for packaging liquid material such as liquid food; more specifically relating to a packaging container of an easily openable pouring outlet, such as a gable-top seal type or the like.
  • packaging containers for packaging liquid food.
  • Commonly used types are: a quasi rectangular parallelopiped, i.e., a gable-top packaging container, with a rectangular cross section and a raised top equipped with horizontally sealing fin parts, and a flat-top packaging container which is otherwise the same as the gable-top type.
  • These packaging containers are laminated with a liquid-tight plastic layer on the paper material, and are manufactured out of blanked packaging materials provided with necessary folds (aluminium foil-layered depending on a purpose).
  • Said blanks are fed into a packaging machine in a flattened tubular form with the longitudinal edges sealed, and while they are unflattened and their bottoms closed, they are filled with content such as milk, and finally the top part is folded to form packaging containers of either a gable-top or a flat-top.
  • the prescribed pouring side of the triangular folded parts which are folded in between a pair of mutually opposing roof slants that form the gable-top (more specifically, a pair of small, folded triangular parts on both shoulders of an isosceles triangle) is lifted from a side of said roof slants.
  • the present invention has been conceived in light of the above-mentioned considerations, and provides a packaging container of either a gable-top or flat-top of the same folding method, in which the pouring outlet can be opened with much less effort at the fingertips compared to the packaging container of the prior art.
  • the packaging container of the present invention is made of paper or card board covered with thermoplastic material by folding and sealing, comprising a bottom, four side walls two mutually opposed main top panels at the upper end of two side walls for forming a roof-like top and two main sealing panels formed along the top of said main top panels, two mutually opposed folding top panels between the main top panels and having triangular portions to be folded in-between said main top panels, and foldable sealing panels at the upper end of said folding panels, each foldable sealing panel folded about a center fold and sealed between said main folding panels, the height of the foldable sealing panels being smaller height than said main sealing panels, one of said folding top panels forming a pouring outlet when folded outwardly after tearing open the seal between the respective foldable sealing panel and the main sealing panels, and the foldable sealing panel of at least the outlet-forming folding top panel is cut-off with a reduced height over part of its width on both sides of the center fold.
  • the height of the foldable sealing panels at the above-mentioned cut part is most effectively formed to be at least 8 mm.
  • the mutually opposing adhered main folding panels positioned at the top part of the main top panel of the pair of mutually opposing rectangles are first torn apart to the left and right, and then the foldable sealing panels adhered to the back of the main folding panels are torn off to lift the triangular folding top panels and form an opening, when, due to the cut part formed in the center of the foldable sealing panels, the adhesion area between the foldable sealing panels and the back of the main folding panels is small, therefore the effort needed to tear apart the panels can be reduced.
  • Fig. 2 shows a diagonal view of the packaging container manufactured in accordance with the present invention and having a gable-top
  • Fig. 1 shows a blank used to make the packaging container of Fig. 2.
  • the packaging container comprises sheet paper covered with thermoplastic covering material on both sides.
  • Said blank is equipped with four side wall panels (1), (2), (3), (4) that are diveded by longitudinal folds (16), (16), ..., and a narrow longitudinal joining panel (5) on the external side of the rightmost side wall panel (4) via a longitudinal fold (16).
  • a main top panel (6) and top triangular folding top panels (7 1 ), (72) for forming the top part of the packaging container are provided via an upper horizontal fold (14), and on the lower side, main bottom panels (10), (11) and bottom triangular folding panels (12 1 ), (122) are provided, and on the external side of the main top panel (6) and the top triangular panels (7 1 ), (72), a main folding panel (8) and foldable sealing panels (9 1 ), (92) for forming an upper sealing fin are provided via a top horizontal fold (13).
  • the longitudinal joining panel (5) is welded to panel (1) by matching the longitudinal fold (16) which is on the inner side the joining panel (5) and a side edge (1 a) of the side wall panel (1) which is on the opposite side of the joining panel.
  • the bottom of the package is made by folding small panels (12 2 ) of the bottom triangular folding panel under main bottom panels (10), (11) that face each other at the lower part of the blank which is converted to a tube, placing said main bottom panels (10), (11) externally, with (10) most externally, and mutually opposing large triangle panels (12 1 ), (121) internally, using the lower folds (15) as hinges.
  • the top lid which is sealed after the liquid content is filled is made by folding small triangular panels (7 2 ) of the top triangular folding panel under the main top panels (6), (6) that face each other at the upper part of the blank which is converted to a tube, placing said main top panles (6), (6) externally, and mutually opposing large triangular panels (7 1 ), (71) internally, using upper folds (14) as hinges; and further via a top horizontal fold (13), mutually opposing main folding panels (8), (8) and foldable sealing panels (9 1 ), (92) are overlaid and weld-sealed so as to grasp the latter between the former to form a top sealing fin part (see Fig. 3).
  • the foldable sealing panel (9 1 ) on the pouring outlet side is cut short for a prescribed width on both sides of the center fold (18) so that the height (9h) of said panel at the cut-off part (9a) is 8 mm.
  • This figure 8 mm has been obtained after various tests to determine the shortest possible height that will prevent leakage of the content during long periods of transport, packaging and storage to minimize the adhesion area with the back of the main folding panel (8).
  • a diagonal fold (17) extending diagonally upward from the lower end of the crest edge on the puring outlet side is provided while the package is still in the blank form (Fig. 1); therefore, when tearing apart the top to the left and right from the crest, the triangle part (6')at the edge of said panel is bent for easy opening.
  • the packaging container is formed as such, so that wehn a consumer wants to form a pouring outlet on the container, the mutually opposing adhered main folding panels (8), (8) at the top of the packaging container are torn apart to the left and right (see
  • a flat-top packaging container can also be made by making the height of the main top panels (6), (6) of the container blank (Fig. 1) (i.e., the height of the top triangular folding panels (7 1 ), (72)) as low as that of the bottom forming panels and forming the main folding panel (8) and foldable sealing panels (9 1 ), (92) as in the above embodiment, and forcing down the top sealing fin onto the main top panel (6) when forming the top lid.
  • the present invention is constructed as described above and has the follwing effects.
  • the upper part of the triangular folding top panel is more easily torn off and lifted up after the container crest is torn apart to the left and right because the adhesion area of the torn-off part is smaller compared to the conventional packaging container of this type.
  • the force required to tear off the panels can be reduced to 65 % of the effort required in the conventional method while preventing leakage stably in packaging, storage and long transport periods.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
EP91112823A 1990-07-31 1991-07-30 Verpackungsbehälter Withdrawn EP0469562A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP81204/90 1990-07-31
JP8120490U JPH0438921U (de) 1990-07-31 1990-07-31

Publications (1)

Publication Number Publication Date
EP0469562A1 true EP0469562A1 (de) 1992-02-05

Family

ID=13739955

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112823A Withdrawn EP0469562A1 (de) 1990-07-31 1991-07-30 Verpackungsbehälter

Country Status (2)

Country Link
EP (1) EP0469562A1 (de)
JP (1) JPH0438921U (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3189246A (en) * 1961-07-25 1965-06-15 Jr Seaver A Seline Gable top container

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5524295B2 (de) * 1972-02-29 1980-06-27
AR243127A1 (es) * 1984-12-19 1993-07-30 Tetra Pak Internat Ab Envase de carton revestido de un termoplastico y dispositivo para su fabricacion.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3189246A (en) * 1961-07-25 1965-06-15 Jr Seaver A Seline Gable top container

Also Published As

Publication number Publication date
JPH0438921U (de) 1992-04-02

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