EP0119303B1 - Bodenausbildung eines Papierbehälters für Flüssigkeiten - Google Patents

Bodenausbildung eines Papierbehälters für Flüssigkeiten Download PDF

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Publication number
EP0119303B1
EP0119303B1 EP83111670A EP83111670A EP0119303B1 EP 0119303 B1 EP0119303 B1 EP 0119303B1 EP 83111670 A EP83111670 A EP 83111670A EP 83111670 A EP83111670 A EP 83111670A EP 0119303 B1 EP0119303 B1 EP 0119303B1
Authority
EP
European Patent Office
Prior art keywords
portions
fold
lines
paper box
triangular
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
EP83111670A
Other languages
English (en)
French (fr)
Other versions
EP0119303A1 (de
Inventor
Kiyoshi Shirakawa
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.)
Sanyo Kokusaku Pulp Co Ltd
Original Assignee
Sanyo Kokusaku Pulp Co Ltd
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 Sanyo Kokusaku Pulp Co Ltd filed Critical Sanyo Kokusaku Pulp Co Ltd
Priority to AT83111670T priority Critical patent/ATE27692T1/de
Publication of EP0119303A1 publication Critical patent/EP0119303A1/de
Application granted granted Critical
Publication of EP0119303B1 publication Critical patent/EP0119303B1/de
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

  • This invention relates to a bottom structure of a paper box for containing milk, juice, sake (Japanese wine made by rice), shoyu (soy sauce) and other liquid to be sold, according to the preamble of the main claim and as known by US-A-4113168.
  • paper boxes made of paper sheets capable of being thermally fused and impermeable to liquids e.g., thick thermoplastic synthetic resin laminated paper sheets and thick synthetic resin sheets have been extensively used to replace the conventional metal cans and bottles for containing milk, juice, sake, shoyu and other liquids to be sold.
  • the paper boxes have many advantages over the metal cans and bottles. Since paper boxes usually have cubic or quadratic prism shape, they can be stacked in a minimum space for transportion or storage. They are light in weight, and their thickness is very small compared to glass containers. Artistic printing may be readily made on the surface to increase commercial value. They can be readily crushed flat after the content has been taken out and disposed of by incineration after use. They reliably hold firm the content therein.
  • JP-U-46-4661 discloses a paper box for liquids developed by Ex-Cell-0 Corporation.
  • the disclosed paper box has a bottom structure formed by folding a thick thermoplastic synthetic resin laminated paper sheet as shown in the developed view in Fig. 1.
  • the solid lines represent outer cut lines or notch lines
  • the dashed lines represent folding lines along which the adjoining side portions of the paper sheet are to be folded inwardly with respect to the paper so that they are at right angles to each other
  • the chain-and-dot lines represent fold-back lines, along which one of the adjoining side portions of the paper sheet is to be folded through 180° which respect to the paper so that they contact each other.
  • This bottom structure of the paper box for liquids features that the portion where the paper edges join at the bottom for the liquid can be minimized. Also, it features that among inwardly folded triangular portions 10 and 11 and folded-back triangular portions 10a, 10b, 11 a and 11b, the triangular portions 10 and 11 are isosceles triangles with an apex angle 8 smaller than 90° so that the edges Y and Y' of the folded-back portions 10a and 10b closely abut the edges Z and Z' of the folded-back portions 11 a and 11b respectively.
  • the inventor has conducted detailed study of this bottom structure of this prior art paper box for liquids to find that with the paper box disclosed in the Japanese Utility Model Publication No. 46-4661, in which the inwardly folded portions 10 and 11 have an isosceles triangle with an apex angle smaller than 90°, the apex portions of the inwardly folded portions 10 and 11 gather at a point and push each other when the paper box is formed.
  • the triangular portions 10a, 10b, 11 a and 11 cannot be satisfactorily folded back along the fold-back lines defining the opposite sides of the triangular portions 10 and 11 because the two fold-back lines extend from the apex.
  • Object of the invention is to provide a bottom structure for a paper box for liquids, which can eliminate the afore-mentioned square or rectangular central portion of the bottom consisting of only two blank layers while providing the merits of the bottom structure of a paper box for liquids disclosed in US-A-4 113 168.
  • a bottom structure for a paper box for liquids which is made of a heat-sealable paper sheet blank having four side portions defined by intervening first fold lines and four bottom portions separated from respective said side portions along second fold lines and also defined by intervening extensions of said first fold lines, a pair of opposed bottom portions among said four bottom portions constituting an outermost layer of said bottom structure and having end portions to be overlapped and heat-sealed to each other, the other pair of bottom portions among said four bottom portions each having a triangular portion defined by said corresponding second fold line and fold-back lines extending from the corners of said corresponding side portion and to be folded at right angles to said corresponding side portion and fold-back portions connected to said triangular portions along said respective fold-back lines and to be heat-sealed over their entire area to said triangular portions, one of said fold-back portions being triangular in shape and having a free edge extending from an intermediate point of the respective one of said fold-back lines parallel to said corresponding
  • the paper sheet blank of the paper box has four side portions 1 to 4 defined by intervening fold lines a to c. It also has a side seam flap 5 terminating in the side portion 1 at one end of the blank along a fold line d. It further has bottom portions 6 and 8 terminating in the respective opposed side portions 1 and 3 along fold lines e and f and also bottom portions 7 and 9 terminating in the respective opposed side portions 2 and 4 along fold lines g and h. The bottom portions 6 to 9 are also defined by intervening extensions of the fold lines a to d.
  • the paper sheet further has a seam flap extension 5' terminating in the side seam flap 5 along a fold line m and also terminating in the bottom portion 6 along an extension of the fold line d.
  • the bottom portions 7 and 9 are opposed bottom portions constituting an outermost bottom layer. Their free end portions are overlapped and heat sealed together when forming the paper box.
  • the other opposed bottom portions 6 and 8 respectively have right isosceles triangular portions 6A and 8A, which are defined by the fold lines e and f and also by fold-back lines i to I extending from the corners x of the side portions 1 and 3 at an angle of 45° to the fold lines e and f and are folded at right angles to the side portions 1 and 3, and fold-back portions 6B and 6C and 8B and 8C, which terminate on the opposite sides of the portions 6A and 8A along the fold-back lines i and j and k and I and are to be heat sealed over their entire area to the portions 6A and 8A.
  • the portions 6B, 6C, 8B and 8C are right isosceles triangular in shape with the free edges thereof extending from an intermediate point on the fold-back lines i and k and parallel to the fold lines e and f.
  • the other portion 6C and 8C are substantially D-shaped with their free edges partly constituted by extensions of the fold-back lines i and k.
  • the fold-back portions 6B, 6C, 8B and 8C are adapted such that the entire lengths of their free edges parallel to the fold lines between the side portions 1 and 3 and bottom portions 6 and 8 abut with the mating edges uniformly when they are folded back along the fold-back lines i to I.
  • the fold-back lines i and k have a different length from the length of the other fold-back lines j and I. Therfore, it is sometimes difficult to fold back the portions 6C and 8C along the longer fold-back lines j and I. Accordingly, notches S are formed, if necessary, in the blank adjacent to the free end of the fold-back lines j and I and on the side thereof opposite the extensions of the side portions 1 and 3.
  • the paper sheet blank described above, shown in the development view of Fig. 2, is a heat-sealable paper sheet blank, e.g., a thermoplastic synthetic resin laminated paper sheet blank or a synthetic resin sheet blank.
  • the side portions 1 to 4 are folded inwardly 90° along the fold lines a to c, and also the side seam flap 5 is folded inwardly 90° along the fold line d.
  • the back surface of the side seam flap 5 is heat sealed to the front surface of the corresponding end portion of the side portion 4.
  • the bottom portions 6 to 9 and seam flap extension 5' are also bent inwardly 90° along extensions of the fold lines a to d.
  • the front surface of the seam flap extension 5' is thus heat sealed to the back surface of the corresponding bottom portion 9 of the side portion 4 simultaneously with the heat sealing of the side seam flap 5 to the side portion 4.
  • the front surface of the fold-back portions 6B, 6C, 8B and 8C is heat sealed to the front surface of the corresponding right isosceles triangular portions 6A and 8A of the bottom portions 6 and 8, and then the overlapped end portions of the bottom portions 7 and 9 are heat sealed together.
  • the bottom structure of a paper box for liquids according to the invention as shown in Figs. 4 and 5 is completed.
  • the central portions 6A and 8A of the bottom portions 6 and 8 which constitute the innermost paper sheet blank layer of the bottom are right isosceles triangular in shape, and the fold-back portions 6B, 6C, 8B and 8C terminating in these right isosceles triangular central portions 6A and 8A along the respective fold-back lines i to I just overlaps the front surface of the portions 6A and 8A. Nevertheless, only a single fold-back line, namely fold-back lines j and I, extends from the apex of each of the right isosceles triangular portions 6A and 8A.
  • the entire lengths of the free ends of the fold-back portions 6B, 6C, 8B and 8C parallel to the fold lines between the side portions 1 and 3 and bottom portions 6 and 8 uniformly abut with the mating edges so that the reliability in preventing leakage of the contained liquid can be improved.
  • This improvement in reliability is obtainable because the square or rectangular central bottom portion consisting of only two paper sheet blank layers as in the paper box bottom structure proposed earlier by the inventor and disclosed in the US-A-4 113 168 is reduced to one half. The remaining half consists of four paper sheet blank layers like the rest of the bottom structure, and the apexes of the right isosceles triangular portions 6A and 8A just touch each other in the remaining four-layer portion.
  • the bottom structure of a paper box for liquid according to the invention can be formed from the same amount of paper sheet blank as the paper box bottom structure disclosed in the US-A-4 113 168 and is thus highly economical.
  • it greatly improves low leakage prevention effect due to the presence of the central bottom portion consisting of only two paper sheet blank layers while having all the features of the paper box bottom structure disclosed in the US-A-4 113 168.
  • the industrial value which the invention enjoys will be by far greater when paper boxes of larger size are required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
  • Packages (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Wrappers (AREA)
  • Sorption Type Refrigeration Machines (AREA)

Claims (3)

1. Bodenausbildung für einen Papierbehälter für Flüssigkeiten, welcher aus einem wärmesiegelbaren Zuschnitt aus einem Papierbogen, der vier Seitenabschnitte aufweist, die durch dazwischenliegende erste Faltlinien begrenzt sind, und aus vier Bodenabschnitten besteht, die von den jeweiligen Seitenabschnitten längs zweiter Faltlinien getrennt sind und die ferner durch dazwischenliegende Verlängerungen der ersten Faltlinien begrenzt sind, wobei ein Paar von gegenüberliegenden Bodenabschnitten von den vier Bodenabschnitten eine äußere Lage der Bodenausbildung bilden und Endabschnitte aufweisen, die einander überlappen und untereinander wärmeversiegelt sind, wobei das andere Paar der Bodenabschnitte von den vier Bodenabschnitten jeweils einen dreieckigen Abschnitt aufweist, der von der entsprechenden zweiten Faltlinie und von Rückfaltungslinien begrenzt ist, die sich von den Ecken des entsprechenden Seitenabschnittes aus erstrecken und die unter rechten Winkeln zu dem entsprechenden Seitenabschnitt und den zurückgefalteten Abschnitten, die mit den dreieckigen Abschnitten längs der jeweiligen Rückfaltungslinien verbunden sind, gefaltet bzw. zurückgefaltet werden, und die über die gesamte Fläche mit den dreieckigen Abschnitten wärmeversiegelt werden, wobei einer der zurückgefalteten Abschnitte eine dreieckie Form aufweist und eine freie Kante hat, die sich von einem Zwischenpunkt der jeweiligen Rückfaltungslinie parallel zu der entsprechenden zweiten Faltlinie erstreckt, dadurch gekennzeichnet, daß jeder dreieckige Abschnitt ein rechtwinkliges gleichseitiges Dreieck ist, und daß der andere der zurückgefalteten Abschnitte im wesentlichen vierseitig D-förmig ist und eine freie Kante aufweist, die teilweise eine Verlängerung einer der entsprechenden Rückfaltungslinien bildet, wobei die Rückfaltungsabschnitte derart ausgebildet sind, daß die gesamten Längen der freien Kanten parallel zu den zweiten Faltlinien zwischen dem jeweiligen Paar der Bodenabschnitte und der entsprechenden Seitenabschnitte gleichmäßig an den zugehörigen Kanten anliegen.
2. Bodenausbildung für einen Papierbehälter für Flüssigkeiten nach Anspruch 1, dadurch gekennzeichnet, daß der wärmesiegelbare Papierbogenzuschnitt aus einem laminierten Papierbogen aus einem thermoplastischen Kunststoffharz besteht.
3. Bodenausbildung für einen Papierbehälter für Flüssigkeiten nach Anspruch 1, dadurch gekennzeichnet, daß der wärmesiegelbare Papierbogenzuschnitt aus einem Bogen aus einem Kunstharz besteht.
EP83111670A 1983-03-03 1983-11-22 Bodenausbildung eines Papierbehälters für Flüssigkeiten Expired EP0119303B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83111670T ATE27692T1 (de) 1983-03-03 1983-11-22 Bodenausbildung eines papierbehaelters fuer fluessigkeiten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP33739/83 1983-03-03
JP58033739A JPS59163141A (ja) 1983-03-03 1983-03-03 液体収納用紙箱の底構造

Publications (2)

Publication Number Publication Date
EP0119303A1 EP0119303A1 (de) 1984-09-26
EP0119303B1 true EP0119303B1 (de) 1987-06-10

Family

ID=12394773

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83111670A Expired EP0119303B1 (de) 1983-03-03 1983-11-22 Bodenausbildung eines Papierbehälters für Flüssigkeiten

Country Status (11)

Country Link
EP (1) EP0119303B1 (de)
JP (1) JPS59163141A (de)
AT (1) ATE27692T1 (de)
AU (1) AU559812B2 (de)
DE (1) DE3371979D1 (de)
DK (1) DK82484A (de)
ES (1) ES285334Y (de)
FI (1) FI71704C (de)
GB (1) GB2135970B (de)
NO (1) NO834285L (de)
ZA (1) ZA834566B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6013639A (ja) * 1983-07-01 1985-01-24 山陽国策パルプ株式会社 液体収納用紙箱の底構造
GB8920336D0 (en) * 1989-09-08 1989-10-25 Reed Packaging Ltd Carton and blank for making the same
US5335847A (en) * 1992-01-21 1994-08-09 Elopak Systems A.G. Flat top container and blank for constructing same
EP0552928A1 (de) * 1992-01-21 1993-07-28 Elopak Systems Ag Verpackung und Zuschnitt dafür
GB0712824D0 (en) * 2007-07-03 2007-08-08 Elopak Systems Improvements in or relating to containers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB435891A (en) * 1933-10-19 1935-10-01 Charles Eugene Quaeghebeur Improvements in or relating to folding boxes
GB1036320A (en) * 1963-12-17 1966-07-20 Ex Cell O Corp Tucker apparatus for a carton forming machine
US3239126A (en) * 1963-12-27 1966-03-08 Ex Cell O Corp Paperboard container with liquid flavor retaining means
US4113168A (en) * 1976-07-22 1978-09-12 Sanyo-Kokusaku Pulp Co., Ltd. Bottom structure of cardboard type liquid packing container
JPS5630259A (en) * 1979-08-20 1981-03-26 Sanyo Electric Co Ltd Negative plate for alkaline storage battery

Also Published As

Publication number Publication date
JPS59163141A (ja) 1984-09-14
FI834596A0 (fi) 1983-12-14
GB2135970B (en) 1987-01-21
DK82484D0 (da) 1984-02-21
ATE27692T1 (de) 1987-06-15
GB2135970A (en) 1984-09-12
AU1646883A (en) 1984-09-06
DE3371979D1 (en) 1987-07-16
GB8316991D0 (en) 1983-07-27
FI834596A (fi) 1984-09-04
ZA834566B (en) 1984-03-28
ES285334Y (es) 1987-01-16
EP0119303A1 (de) 1984-09-26
FI71704C (fi) 1987-02-09
NO834285L (no) 1984-09-04
ES285334U (es) 1986-04-01
FI71704B (fi) 1986-10-31
AU559812B2 (en) 1987-03-19
DK82484A (da) 1984-09-04

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