EP0824459B1 - Punched sheet for a tray-like packaging - Google Patents

Punched sheet for a tray-like packaging Download PDF

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Publication number
EP0824459B1
EP0824459B1 EP96912379A EP96912379A EP0824459B1 EP 0824459 B1 EP0824459 B1 EP 0824459B1 EP 96912379 A EP96912379 A EP 96912379A EP 96912379 A EP96912379 A EP 96912379A EP 0824459 B1 EP0824459 B1 EP 0824459B1
Authority
EP
European Patent Office
Prior art keywords
long sides
fold lines
bottom part
short
sides
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
EP96912379A
Other languages
German (de)
French (fr)
Other versions
EP0824459A1 (en
Inventor
Lars Brus
Rolf Samuelsson
Magnus Renman
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.)
DS Smith Packaging Marketing NV
Original Assignee
SCA Packaging Marketing NV
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
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Application filed by SCA Packaging Marketing NV filed Critical SCA Packaging Marketing NV
Publication of EP0824459A1 publication Critical patent/EP0824459A1/en
Application granted granted Critical
Publication of EP0824459B1 publication Critical patent/EP0824459B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65D5/20—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
    • B65D5/28—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with extensions of sides permanently secured to adjacent sides, with sides permanently secured together by adhesive strips, or with sides held in place solely by rigidity of material

Definitions

  • the present invention relates to a punched blank which is intended to form a tray comprising a bottom part, two long sides and two short sides, which sides are folded up from the bottom part and united at their ends for completing the tray.
  • the planar blank is primarily intended to consist of cardboard or corrugated fibreboard.
  • Trays of fibreboard or other materials are well known. They are typically produced by punching a blank of corrugated fibreboard which is provided with folding lines for the short and long sides, whereupon these sides are folded up and united with each other at the ends to thereby form vertical corners compared to the bottom part.
  • the blank is usually punched out and provided with narrow recesses between the intended long sides and the intended short sides at the corners of the bottom part, in such a way that the long sides are given their final length and the short sides are thereby provided with flaps which are folded in inside the long sides after folding up. These flaps are provided with glue and glued to the long sides after folding.
  • the folding, and accordingly the completion, of the tray normally occurs automatically and the glue is cured after a few seconds, whereby the tray gets its strength.
  • the trays which are produced according to said methods and which preferably consist of fibreboard are used for different purposes. They may for example be used to carry beer cans or completely different objects, such as vegetables.
  • US 3 062 429 discloses a packaging blank having slightly curved fold lines in order to provide a package with straight upper edges.
  • DE 26 54 415 discloses packaging blanks having more than one fold line between a bottom portion and each side portion of the blank.
  • a normal tray usually has an outwardly curved long side as a result of the fact that the moveability of the cans in the tray influences the long sides with outwardly-directed forces during normal manual handling. This is of course a great disadvantage as the tray can thereby easily collapse due to folding of the long sides.
  • the blank consists of corrugated fibreboard, plastics or the like.
  • the punched blank according to the invention has short sides which are longer than the width of the bottom part.
  • the punched blank is provided with straight fold markings, at a 90° angle with respect to the fold lines between the bottom part and the long sides in the long sides at the border between the middle part of the fold lines and the outwardly-directed end part of these.
  • straight fold markings are made, at a 90° angle with respect to the fold lines between the bottom part and both the short and long sides at the border between the middle part of the fold lines and the outwardly-directed end part of these on both the short and long sides.
  • the plane blank in the figure which consists of corrugated fibreboard, comprises a bottom part 1 of substantially rectangular shape and two long sides 2 and two short sides 3. Between the short and the long sides 3 and 2 slots 4 have been punched in such a way that the long sides 2 have been given their final length and the short sides 3 have been formed with flaps 5.
  • fold lines have been pressed into the cardboard. These fold lines consist of a straight middle part 6, but have been directed outwardly at the ends and form a separate part 7 of the fold line. This outwardly-directed part 7 of the fold lines may form an angle of 2-20° with respect to the middle part 6 of the fold lines. These outwardly-directed parts 7 of the fold lines may be made only in the long sides whereas the short sides 3 may have a fold line 6 which extends all the way to the corners.
  • both the short and the long sides 3 and 2 are folded up from the bottom part 1 at their fold lines and the flaps 5 are glued to the inside of the long sides 2.
  • an inwardly-directed force will arise in the long sides 2.
  • These folds will be greater, the greater the angle the outwardly-directed parts 7 has compared to the middle parts 6 of the fold lines.
  • By creating an inwardly directed force in the long sides they will not tend to be cracked outwardly. They will instead rest against, and press against, the contents, for example beer cans in the tray. The same will of course occur even at the short sides if these have been provided with outwardly-directed end parts 7 of the fold lines.
  • the effect is also obtained that the bottom part at the short sides will be given a smoother transition to the short sides 3. This is an advantage for the strength of the tray.
  • the figure shows further fold indications 8 on both the long and the short sides at the border between the middle parts 6 and the outwardly-directed parts 7 of the fold lines. These fold markings 8 are made to make the tray more easily able to adopt its final shape, but they are not necessary for the function of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
  • Packages (AREA)
  • Wrappers (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Packaging For Recording Disks (AREA)
  • Sheet Holders (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)

Abstract

The invention relates to a punched blank for a tray-like package. It comprises a bottom part (1), two long sides (2) and two short sides (3) in one piece with the bottom part (1) and marked with respect to this by fold lines. The invention is characterized in that the fold lines (7) between the bottom part (1) and at least the long sides (2) are directed outwardly at the ends and form an angle with the middle part (6) of the fold lines of 2-20 DEG .

Description

TECHNICAL FIELD:
The present invention relates to a punched blank which is intended to form a tray comprising a bottom part, two long sides and two short sides, which sides are folded up from the bottom part and united at their ends for completing the tray. The planar blank is primarily intended to consist of cardboard or corrugated fibreboard.
PRIOR ART:
Trays of fibreboard or other materials are well known. They are typically produced by punching a blank of corrugated fibreboard which is provided with folding lines for the short and long sides, whereupon these sides are folded up and united with each other at the ends to thereby form vertical corners compared to the bottom part. The blank is usually punched out and provided with narrow recesses between the intended long sides and the intended short sides at the corners of the bottom part, in such a way that the long sides are given their final length and the short sides are thereby provided with flaps which are folded in inside the long sides after folding up. These flaps are provided with glue and glued to the long sides after folding. The folding, and accordingly the completion, of the tray normally occurs automatically and the glue is cured after a few seconds, whereby the tray gets its strength.
If materials other than corrugated fibreboard are used, it is possible to proceed in the same way as above, although completely different production methods can also be used.
The trays which are produced according to said methods and which preferably consist of fibreboard are used for different purposes. They may for example be used to carry beer cans or completely different objects, such as vegetables.
US 3 062 429 discloses a packaging blank having slightly curved fold lines in order to provide a package with straight upper edges.
DE 26 54 415 discloses packaging blanks having more than one fold line between a bottom portion and each side portion of the blank.
TECHNICAL PROBLEM:
Depending on the field of application different demands are put on the different trays. For example, if the tray is to be used for beer cans it is important that the tray, if it is carried at the short sides, does not crack at the middle part due to the weight of the beer cans. A normal tray usually has an outwardly curved long side as a result of the fact that the moveability of the cans in the tray influences the long sides with outwardly-directed forces during normal manual handling. This is of course a great disadvantage as the tray can thereby easily collapse due to folding of the long sides.
THE SOLUTION:
The problems with the known trays have therefore been solved according to the present invention by creating a punched blank for a tray in accordance with claim 1.
According to the invention it is suitable if the fold lines between the bottom part and both the short and long sides are directed outwardly at the ends.
According to the invention it is further suitable that the blank consists of corrugated fibreboard, plastics or the like.
The punched blank according to the invention has short sides which are longer than the width of the bottom part.
According to the invention the punched blank is provided with straight fold markings, at a 90° angle with respect to the fold lines between the bottom part and the long sides in the long sides at the border between the middle part of the fold lines and the outwardly-directed end part of these.
According to the invention it is further suitable that straight fold markings are made, at a 90° angle with respect to the fold lines between the bottom part and both the short and long sides at the border between the middle part of the fold lines and the outwardly-directed end part of these on both the short and long sides.
DESCRIPTION OF THE FIGURE:
The invention will now be described in more detail in connection with the attached drawing which shows an embodiment of the invention in the shape of a punched blank of corrugated fibreboard.
DETAILED DESCRIPTION:
The plane blank in the figure, which consists of corrugated fibreboard, comprises a bottom part 1 of substantially rectangular shape and two long sides 2 and two short sides 3. Between the short and the long sides 3 and 2 slots 4 have been punched in such a way that the long sides 2 have been given their final length and the short sides 3 have been formed with flaps 5.
To mark the short and long sides, pre-formed fold lines have been pressed into the cardboard. These fold lines consist of a straight middle part 6, but have been directed outwardly at the ends and form a separate part 7 of the fold line. This outwardly-directed part 7 of the fold lines may form an angle of 2-20° with respect to the middle part 6 of the fold lines. These outwardly-directed parts 7 of the fold lines may be made only in the long sides whereas the short sides 3 may have a fold line 6 which extends all the way to the corners.
When the punched blank is to be formed into a tray, both the short and the long sides 3 and 2 are folded up from the bottom part 1 at their fold lines and the flaps 5 are glued to the inside of the long sides 2. By forming the fold lines in that way, according to the invention, with the outwardly directed ends 7, an inwardly-directed force will arise in the long sides 2. These folds will be greater, the greater the angle the outwardly-directed parts 7 has compared to the middle parts 6 of the fold lines. By creating an inwardly directed force in the long sides they will not tend to be cracked outwardly. They will instead rest against, and press against, the contents, for example beer cans in the tray. The same will of course occur even at the short sides if these have been provided with outwardly-directed end parts 7 of the fold lines.
Apart from the effect that the long sides 2 will press inwardly against the contents, the effect is also obtained that the bottom part at the short sides will be given a smoother transition to the short sides 3. This is an advantage for the strength of the tray.
With normal trays without the outwardly-directed parts 7, high stresses will usually arise at the short sides 3. It has surprisingly been shown that these stresses are strongly decreased with the construction according to the present invention and it is possible to load the tray with a load which is about 20% greater than with conventional trays.
The figure shows further fold indications 8 on both the long and the short sides at the border between the middle parts 6 and the outwardly-directed parts 7 of the fold lines. These fold markings 8 are made to make the tray more easily able to adopt its final shape, but they are not necessary for the function of the invention.
The invention is not limited to the embodiment shown and it can be varied in different ways within the scope of the claims.

Claims (6)

  1. Punched blank for a tray-like package comprising a bottom part (1), two long sides (2) and two short sides (3) in one piece with the bottom part (1) and marked with respect to the bottom part (1) by a fold line respectively, wherein each such fold line between the bottom part (1) and at least each of the two said long sides (2) has end parts (7) which are directed outwardly with respect to a middle part (6) of each such fold line, said blank being intended to be folded up and the sides (2,3) united with each other at the ends, characterized in that the fold lines between the bottom part and at least the long sides have straight, parallel middle parts (6) and that the ends (7) of the fold lines form an angle of 2-20 degrees with the straight middle part (6) of the fold lines.
  2. Punched blank according to claim 1, characterized in that the fold lines (7) between the bottom part (1) and both the short and the long sides (3, 2) are directed outwardly at the ends.
  3. Punched blank according to claim 1 or 2, characterized in that the blank consists of corrugated fibreboard, plastics or the like.
  4. Punched blank according to any one of claims 1-3, characterized in that the short sides (3) are longer than the width of the bottom part (1).
  5. Punched blank according to any one of claims 1-4, characterized in that straight fold markings (8) are made at a 90° angle with respect to the fold lines (6) between the bottom part (1) and the long sides (2), on the long sides (2) at the border between the middle part (6) of the fold lines and the outwardly-directed end part (7) of these.
  6. Punched blank according to any one of claims 1-5, characterized in that straight fold markings (8) are made at a 90° angle with respect to the fold lines (6) between the bottom part (1) and both the short and long sides (3, 2), at the border between the middle part (6) of the fold lines and the outwardly-directed end part (7) of these on both the short and long sides (3, 2).
EP96912379A 1995-04-27 1996-04-25 Punched sheet for a tray-like packaging Expired - Lifetime EP0824459B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9501548A SE507070C2 (en) 1995-04-27 1995-04-27 Punched sheet for a tray-like package
SE9501548 1995-04-27
PCT/SE1996/000546 WO1996033916A1 (en) 1995-04-27 1996-04-25 Punched sheet for a tray-like packaging

Publications (2)

Publication Number Publication Date
EP0824459A1 EP0824459A1 (en) 1998-02-25
EP0824459B1 true EP0824459B1 (en) 2001-10-24

Family

ID=20398100

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96912379A Expired - Lifetime EP0824459B1 (en) 1995-04-27 1996-04-25 Punched sheet for a tray-like packaging

Country Status (12)

Country Link
EP (1) EP0824459B1 (en)
AT (1) ATE207439T1 (en)
AU (1) AU5521096A (en)
DE (1) DE69616307T2 (en)
DK (1) DK0824459T3 (en)
ES (1) ES2167559T3 (en)
FI (1) FI974066A (en)
NO (1) NO974920L (en)
PT (1) PT824459E (en)
SE (1) SE507070C2 (en)
TR (1) TR199701262T1 (en)
WO (1) WO1996033916A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE529035C2 (en) * 2005-05-31 2007-04-17 Smurfit Munksjoe Packaging Ab packaging Trays

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US258183A (en) * 1882-05-16 Butter-tray
BE386752A (en) * 1931-03-02
US3062429A (en) * 1956-04-04 1962-11-06 Lord Baltimore Press Inc Non-bulging package and method of making
ES198716Y (en) 1973-12-12 1975-11-16 Cartonajes International, S. A. FOLDING CONTAINER.
CH588383A5 (en) * 1975-12-30 1977-05-31 Migros
ES257204Y (en) 1981-03-28 1982-05-01 BOX FOR LIQUID, POWDER OR GRAIN PRODUCTS
ES258735Y (en) 1981-06-01 1982-06-16 A CONTAINER FOR STORAGE IN ARTICLE FREEZERS- WET FOOD

Also Published As

Publication number Publication date
FI974066A (en) 1997-11-17
WO1996033916A1 (en) 1996-10-31
PT824459E (en) 2002-04-29
SE9501548D0 (en) 1995-04-27
ES2167559T3 (en) 2002-05-16
NO974920D0 (en) 1997-10-24
EP0824459A1 (en) 1998-02-25
ATE207439T1 (en) 2001-11-15
SE507070C2 (en) 1998-03-23
NO974920L (en) 1997-12-12
DK0824459T3 (en) 2002-01-28
TR199701262T1 (en) 1998-01-21
AU5521096A (en) 1996-11-18
DE69616307T2 (en) 2002-06-27
DE69616307D1 (en) 2001-11-29
FI974066A0 (en) 1997-10-27
SE9501548L (en) 1996-10-28

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