EP0112553B1 - Blank of sheet material being convertible to a container for liquid substances by folding about score lines, and a container made from the blank - Google Patents

Blank of sheet material being convertible to a container for liquid substances by folding about score lines, and a container made from the blank Download PDF

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Publication number
EP0112553B1
EP0112553B1 EP83112911A EP83112911A EP0112553B1 EP 0112553 B1 EP0112553 B1 EP 0112553B1 EP 83112911 A EP83112911 A EP 83112911A EP 83112911 A EP83112911 A EP 83112911A EP 0112553 B1 EP0112553 B1 EP 0112553B1
Authority
EP
European Patent Office
Prior art keywords
bottom closure
panel
fold
blank
panels
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
Application number
EP83112911A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0112553A2 (en
EP0112553A3 (en
Inventor
Gunnar Engen
Tom Frydendal
Svein Slungaard
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.)
Elopak AS
Original Assignee
Elopak AS
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19886871&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0112553(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Elopak AS filed Critical Elopak AS
Priority to AT83112911T priority Critical patent/ATE34716T1/de
Publication of EP0112553A2 publication Critical patent/EP0112553A2/en
Publication of EP0112553A3 publication Critical patent/EP0112553A3/en
Application granted granted Critical
Publication of EP0112553B1 publication Critical patent/EP0112553B1/en
Expired 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
    • B65D5/061—Rectangular containers having a body with gusset-flaps folded inwardly beneath the closure flaps

Definitions

  • the invention relates to containers for liquid substances, preferably containers made from thermoplastic coated paperboard, and more specifically a novel folded bottom closure for such containers.
  • thermoplatic material which is useful in connection with packings for milk products, is polyethylene.
  • the paperboard material from which the containers are made is coated on both sides with a layer of thermoplastic material, preferably polyethylene having a determined thickness. Blanks are then cut from the thus made paperboard roll and scored to permit folding into a tubular shape having readily foldable and sealable leakage-free top and bottom closures.
  • the paperboard material can be a laminate which in addition to paperboard and polyethylene layers comprises an oxygen impervious layer such as an aluminium foil. This layer is positioned below the polyethylene layer facing the interior of the container. For the oxygen impervious layer to have its maximum effect is is desirable that the finished bottom closure should not contain any blank raw edge exposed to the interior of the container.
  • a container having an infolded bottom closure which is very satisfactory in this respect, is the container illustrated and described in US patent specification 3.412.922.
  • the blank from which this container is produced comprises: (a) four side wall panels, pairs of which are of equal width, (b) mutually connected bottom closure panels forming extensions of the side wall panels at the lower ends thereof and (c) a side seam flap positioned at one edge of the blank and extending over substantially the full height of the blank, said side seam flap being adapted to be sealed to the margin of the side wall panel and the bottom closure panel lying at the opposite side of the blank to produce a tubular container blank having a rectangular cross-section, (d) the bottom closure panels comprising two substantially equilateral triangular infold panel portions, each connected to a separate one of two side walls panel portions having the same width and opposing each other in the tubular body, two pairs of triangular foldback panel portions, each pair being associated with a separate one of the infolded panel portions, the foldback panel portions of each pair lying on either side of the associated infold panel portion, and two outer bottom closure panels, each connected to a separate one of the two remaining side wall panels, which have the same width, one of
  • Another object of the invention is to provide a blank for such a container comprising less sheet material.
  • the invention also relates to a container made from a blank as defined above.
  • Figure 1 shows a blank 10 of a flat sheet material such as plastic coated cardboard.
  • the blank lends itself to forming into a tubular container blank having a square cross-section.
  • the lower end of such a tubular container blank 12 is illustrated in Figure 2.
  • the upper end of the blank 10 has top closure panels 13 which are of known design and will therefore not be described further.
  • the lower end of the blank 10 has bottom closure panels 14.
  • the panel group 16 is delimited from the bottom closure panels 14 by means of a score line 26, which is preferably staggered.
  • the purpose of the score line 26 being staggered in the form shown, is to accommodate the thickness of the sheet material as it is bent along the score lines when making the bottom closure, thus preventing crowding of the material at the various corner junctions of the score lines.
  • the blank 10 also comprises a side seam flap 28 extending over substantially the full height of the side wall panels 18, 20, 22, 24, the top closure panels 13 and the bottom closure panels 14.
  • the side seam flap 28 is adapted to be sealed to the margin of the side wall panel 24 and the adjacent bottom closure and top closure panels to form the tubular container blank 12.
  • the blank 10 is defined laterally by edges 30 and 32, the side seam flap 28 and the side wall panels 18 to 24 being separated by score lines 34, 36, 38 and 40. These score lines extend over the entire height of the blank 10.
  • the bottom closure panel group 14 comprises two substantially equilateral triangular infold panel portions 42 and 44, each connected to a separate one of two side wall panel portions 20 and 24, respectively, opposing each other in the tubular blank 12. With each pair of infold panel portions 42, 44 there is associated a pair of triangular fold-back panel portions 46, 48 and 50,52, respectively, the fold-back panel portions of each pair lying on either side of the associated infold panel portion. There are further provided two outer bottom closure panels 54, 56, each connected to a separate one of the two remaining side wall panels 18, 22, which have the same width. One of said outer bottom closure panels 56 has a height sufficient to overlap the other outer side wall panel 54 after being folded down, thereby forming a liquid-tight bottom closure upon sealing of the bottom closure panels 14.
  • the other 54 of the outer bottom closure panels has a fold-back tab 60 extending to both sides of the common longitudinal centre line 58 of the bottom closure panel 54 and the associated side wall panel 18.
  • the tab 60 has a smaller width than the bottom closure panel 54 and accordingly does not extend to the edge 30 and the score line 34, respectively.
  • the tab 60 is intended to be folded back onto the outside surface of the bottom closure panel 54, as best shown in Figure 5. The folding back takes place about a score line 62 which delimits the fold-back tab 60 from the remaining portion of the bottom closure panel 54.
  • the outer edges 64, 66 of the bottom closure panel 54 on either side of the fold-back tab 60 are off-set from the outer edge 68 of the fold-back tab 60 towards the associated side wall panel 18. More specifically, the outer edges 64 and 66 are aligned with the score line 62.
  • a flat blank 10 is first formed, said blank being then converted to a flattened tubular blank by folding about the score lines 38 and 34 and sealing of the side seam flap 28 to the inside of the side wall panel 18 and the adjacent top closure and bottom closure panels.
  • the sealing may be effected by any of the well known sealing methods for the plastic coating, such as heat, sound or light.
  • the flattened tubular blank is next opened into a tubular container blank 12 having a rectangular cross-section on a mandrel (not shown) with the bottom closure panels 14 extending outwardly from the mandrel.
  • the container bottom is infolded in a conventional manner, the triangular infold panel portions 42, 44 being folded about the score line 26, the pairs of triangular fold-back panel portions 46, 48 and 50, 52, respectively, being rotated about the diagonal score lines 47, 49 and 51, 53, respectively, delimiting these fold-back panel portions from the respective infold panel portions 42 and 44.
  • the outer bottom closure panels 54 and 56 will be pulled along inwardly, rotating about the score line 26.
  • the further infolding of the bottom closure panels may be performed by rails acting against the outer bottom closure panels 54, 56.
  • the blank according to the invention does not have to take exactly the form illustrated in the drawings.
  • the blank may be a mirror image of the form illustrated, i.e. it may have an outside surface looking as shown in Figure 1.
  • the side seam may further be positioned between other side wall panels than the panels 18 and 24 as shown. It is also possible to provide the side seam flap 28 at any of the two edges 30 and 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Bag Frames (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Toilet Supplies (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
EP83112911A 1982-12-22 1983-12-21 Blank of sheet material being convertible to a container for liquid substances by folding about score lines, and a container made from the blank Expired EP0112553B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83112911T ATE34716T1 (de) 1982-12-22 1983-12-21 Zuschnitt von blattmaterial zum formen eines behaelters fuer fluessige substanzen durch falten um rillenlinien und von dem zuschnitt hergestellte behaelter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO824328A NO152086B (no) 1982-12-22 1982-12-22 Emne for beholder med vaeskebeskyttede kanter i bunnen
NO824328 1982-12-22

Publications (3)

Publication Number Publication Date
EP0112553A2 EP0112553A2 (en) 1984-07-04
EP0112553A3 EP0112553A3 (en) 1985-10-16
EP0112553B1 true EP0112553B1 (en) 1988-06-01

Family

ID=19886871

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112911A Expired EP0112553B1 (en) 1982-12-22 1983-12-21 Blank of sheet material being convertible to a container for liquid substances by folding about score lines, and a container made from the blank

Country Status (6)

Country Link
EP (1) EP0112553B1 (es)
AT (1) ATE34716T1 (es)
DE (1) DE3376825D1 (es)
ES (1) ES276355Y (es)
NO (1) NO152086B (es)
SU (1) SU1246888A3 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601425A (en) * 1984-02-29 1986-07-22 Nimco Corporation Nonwicking bottom closure for a liquid-tight container
GB9407252D0 (en) * 1994-04-13 1994-06-08 Bowater Pkl Ltd Carton
US5845840A (en) * 1997-10-21 1998-12-08 Tetra Laval Holdings & Finance, S.A. Elevated bottom carton
US6094884A (en) * 1997-10-21 2000-08-01 Tetra Laval Holdings & Finance, Sa Forming apparatus for an elevated bottom carton

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120335A (en) * 1961-09-07 1964-02-04 Ex Cell O Corp Container with infolded bottom closure
US3294310A (en) * 1965-04-26 1966-12-27 Ex Cell O Corp Paperboard container and method of eliminating edge wicking in the container
EP0089033A1 (en) * 1982-03-12 1983-09-21 International Paper Company Container with raw edge protection

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR776650A (fr) * 1933-10-19 1935-01-30 Boîte en carton
US3412922A (en) * 1966-09-06 1968-11-26 Ex Cell O Corp Paperboard container closure
JPS5728739Y2 (es) * 1977-10-18 1982-06-23

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120335A (en) * 1961-09-07 1964-02-04 Ex Cell O Corp Container with infolded bottom closure
US3294310A (en) * 1965-04-26 1966-12-27 Ex Cell O Corp Paperboard container and method of eliminating edge wicking in the container
EP0089033A1 (en) * 1982-03-12 1983-09-21 International Paper Company Container with raw edge protection

Also Published As

Publication number Publication date
DE3376825D1 (en) 1988-07-07
SU1246888A3 (ru) 1986-07-23
NO152086B (no) 1985-04-22
ES276355U (es) 1984-07-16
ES276355Y (es) 1985-02-01
ATE34716T1 (de) 1988-06-15
EP0112553A2 (en) 1984-07-04
EP0112553A3 (en) 1985-10-16
NO824328L (no) 1984-06-25

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