WO2005028319A1 - Fluid container made of cardboard and a method for producing a fluid container - Google Patents

Fluid container made of cardboard and a method for producing a fluid container Download PDF

Info

Publication number
WO2005028319A1
WO2005028319A1 PCT/FI2004/000535 FI2004000535W WO2005028319A1 WO 2005028319 A1 WO2005028319 A1 WO 2005028319A1 FI 2004000535 W FI2004000535 W FI 2004000535W WO 2005028319 A1 WO2005028319 A1 WO 2005028319A1
Authority
WO
WIPO (PCT)
Prior art keywords
package
liquid
liquid package
design
stiffening
Prior art date
Application number
PCT/FI2004/000535
Other languages
French (fr)
Inventor
Jari RÄSÄNEN
Niilo PÖYHÖNEN
Original Assignee
Stora Enso Oyj
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 Stora Enso Oyj filed Critical Stora Enso Oyj
Publication of WO2005028319A1 publication Critical patent/WO2005028319A1/en

Links

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
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/44—Integral, inserted or attached portions forming internal or external fittings
    • B65D5/441—Reinforcements
    • B65D5/443—Integral reinforcements, e.g. folds, flaps
    • 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
    • B65D5/40—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 specially constructed to contain liquids

Definitions

  • Fluid container made of cardboard and a method for producing a fluid container
  • the invention relates to a liquid package made of cardboard for storage of liquids and to a method for producing the liquid package. More specifically, the invention relates to the shaping of the sides of a cardboard liquid package.
  • liquid packages made of cardboard are very thin, and conventional liquid packages frequently have a propensity to expand outwardly under the hydrostatic pressure prevailing within the package.
  • the package is gripped, it is compressed under the force of the external load exerted on it.
  • problems caused by the hydrostatic pressure of a liquid are very large.
  • the present invention reduces the prior art drawbacks mentioned above and enhances the stability of the walls of liquid packages, and also assists in the liquid package retaining its shape under pressure generated by a liquid within the package and/or an external load exerted on the package.
  • figure 1 shows a simplified drawing of a liquid package made of cardboard in the shape of a rectangular prism and comprising a stiffening wall design
  • FIGS. 2a and 2b show figure 1 in cross-section A- A
  • figures 3a-3d show a number of other preferred embodiments of the invention.
  • Figure 1 shows a typical liquid package 1 made of cardboard, in which the stiffen- ing designs of the invention appear in lateral walls 3 and 4.
  • the stiffening design 2 is advantageously provided also in two lateral walls 5 and 6, not shown in the figure.
  • Beside lateral walls 3, 4, 5 and 6, the liquid package 1 naturally comprises a bottom 7 and a top portion 8 allowing the liquid package to be formed into a closed space.
  • the liquid package 1 has a "brick shape", however, the in- vention is not limited to such liquid packages alone. Any different liquid packages made of cardboard are conceivable.
  • a design 2 for stiffening the lateral wall has been produced by compressing the lateral walls 3, 4, 5 and 6 of the cardboard liquid package 1, the design comprising the recess 9 of figure 1, for instance.
  • the bevel 10 of the recess 9 starts from the line 11 in figure 1 and terminates in line 12.
  • the portion of the lateral wall 3 enclosed within line 12 continues as a planar surface.
  • the stiffening design 2 is advantageously provided in all of the lateral walls 3, 4, 5 and 6, however, it is naturally understood that it can be produced on only one, two or three sides, if desired. None- theless, the stiffening design 2 yields the best benefit if it is provided on all the sides 3, 4, 5 and 6 of the liquid package 1.
  • Figures 2a and 2b show figure 1 in cross-section A-A.
  • the stiffening design 2 mainly consists of a rectangular recess 9, and in figure 2b of a projection 13.
  • the starting point 11 and end point 12 of the bevel 10 of the recess 9 in figure 2a have been drawn with a pointed shape, but they can also be rounded. The same has been done for the projection 13 in figure 2b.
  • the design dimensions have been exaggerated for a more distinct drawing.
  • the stiffening design 2 can be performed as one single design, as in figures 2a and 2b, or it may be composed of a plurality of smaller designs, as shown in the following figures 3a-3d.
  • FIGS 3a-3d show other preferred embodiments of the stiffening design 2.
  • the stiffening designs 2 may be either recesses 9 or projections 13.
  • the same liquid package 1 may also contain both recesses 9 and projections 13.
  • the shape of the recess 9 or the projection 13 may also be different from the one shown in these models.
  • Optimal stiffening effect is achieved with the design 2 consisting of a recess 9. From the view of space utilisation, recess 9, whose area equals half of the total area of the lateral wall 3, 4, 5 or 6, is also advantageous during storage and transport of liquid packages 1 piled next to each other.
  • the manufacture of the liquid package 1 of the invention comprises the following steps:
  • the stiffening design 2 can be produced in the liquid package 1 either before or after the blank is creased and sealed. In the step of pressing the stiffening design 2 in the lateral wall 3, 4, 5 or 6, it is advantageous to utilise, in addition to pressure generated by a tool, lubrication, heat and moisture control of the tool, or just some of the means mentioned above. This achieves the best result.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)

Abstract

A liquid package (1) made of cardboard for liquid storage, the package (1) comprising at least four vertical side walls (3, 4, 5, 6), a bottom (7) and a top portion (8) with the parts (3, 4, 5, 6, 7, 8) together forming a closed structure and at least one of the side walls (3, 4, 5, 6) comprising at least one design (2) for stiffening the side wall (3, 4, 5, 6), the design (2) being one or more recesses (9) or depressions (13) produced with a pressing tool in the otherwise planar side wall (3, 4, 5, 6).

Description

Fluid container made of cardboard and a method for producing a fluid container
The invention relates to a liquid package made of cardboard for storage of liquids and to a method for producing the liquid package. More specifically, the invention relates to the shaping of the sides of a cardboard liquid package.
The production of cardboard packages for liquid storage pertain to prior art. A number of such solutions are disclosed in the references US 4,367,828, US 4,655,386 and US 2002/0195483. The most commonly used liquid packages are basically shaped either as a rectangular prism or as solutions of gable top type. Such packages for liquid storage are usually made of polymer-coated multi-layer board.
Despite their multi-layer structure, liquid packages made of cardboard are very thin, and conventional liquid packages frequently have a propensity to expand outwardly under the hydrostatic pressure prevailing within the package. On the other hand, when the package is gripped, it is compressed under the force of the external load exerted on it. Especially long-term storage of a container results in problems caused by the hydrostatic pressure of a liquid.
The present invention reduces the prior art drawbacks mentioned above and enhances the stability of the walls of liquid packages, and also assists in the liquid package retaining its shape under pressure generated by a liquid within the package and/or an external load exerted on the package.
The advantages mentioned above are achieved by forming stiffening designs in the lateral walls of the liquid package during the manufacture.
The preferred embodiments of the invention are characterised by the features defined in the accompanying claims.
The invention is explained in greater detail below, with reference to the accompany- ing drawings, in which
figure 1 shows a simplified drawing of a liquid package made of cardboard in the shape of a rectangular prism and comprising a stiffening wall design,
figures 2a and 2b show figure 1 in cross-section A- A, figures 3a-3d show a number of other preferred embodiments of the invention.
Figure 1 shows a typical liquid package 1 made of cardboard, in which the stiffen- ing designs of the invention appear in lateral walls 3 and 4. The stiffening design 2 is advantageously provided also in two lateral walls 5 and 6, not shown in the figure. Beside lateral walls 3, 4, 5 and 6, the liquid package 1 naturally comprises a bottom 7 and a top portion 8 allowing the liquid package to be formed into a closed space. In this example, the liquid package 1 has a "brick shape", however, the in- vention is not limited to such liquid packages alone. Any different liquid packages made of cardboard are conceivable.
A design 2 for stiffening the lateral wall has been produced by compressing the lateral walls 3, 4, 5 and 6 of the cardboard liquid package 1, the design comprising the recess 9 of figure 1, for instance. The bevel 10 of the recess 9 starts from the line 11 in figure 1 and terminates in line 12. The portion of the lateral wall 3 enclosed within line 12 continues as a planar surface. The stiffening design 2 is advantageously provided in all of the lateral walls 3, 4, 5 and 6, however, it is naturally understood that it can be produced on only one, two or three sides, if desired. Never- theless, the stiffening design 2 yields the best benefit if it is provided on all the sides 3, 4, 5 and 6 of the liquid package 1.
Figures 2a and 2b show figure 1 in cross-section A-A. In figure 2a, the stiffening design 2 mainly consists of a rectangular recess 9, and in figure 2b of a projection 13. In this example, the starting point 11 and end point 12 of the bevel 10 of the recess 9 in figure 2a have been drawn with a pointed shape, but they can also be rounded. The same has been done for the projection 13 in figure 2b. In figures 2a and 2b, the design dimensions have been exaggerated for a more distinct drawing. The stiffening design 2 can be performed as one single design, as in figures 2a and 2b, or it may be composed of a plurality of smaller designs, as shown in the following figures 3a-3d.
Figures 3a-3d show other preferred embodiments of the stiffening design 2. The stiffening designs 2 may be either recesses 9 or projections 13. The same liquid package 1 may also contain both recesses 9 and projections 13. The shape of the recess 9 or the projection 13 may also be different from the one shown in these models. Optimal stiffening effect is achieved with the design 2 consisting of a recess 9. From the view of space utilisation, recess 9, whose area equals half of the total area of the lateral wall 3, 4, 5 or 6, is also advantageous during storage and transport of liquid packages 1 piled next to each other.
The manufacture of the liquid package 1 of the invention comprises the following steps:
- polymer coating cardboard produced as a continuous web in order to achieve liquid tightness,
- manufacturing a coated cardboard as a blank (blanks) of a liquid package 1 (in the case of a liquid package consisting of several parts), by punching for instance,
- producing the stiffening design 2 in the lateral walls by means of a press tool, for instance,
- creasing and sealing the blank(s) of the liquid package 1 with the package still capable of being filled, - filling the liquid package 1 with a liquid,
- closing the liquid package 1 by sealing or by means of a separate closing device.
The stiffening design 2 can be produced in the liquid package 1 either before or after the blank is creased and sealed. In the step of pressing the stiffening design 2 in the lateral wall 3, 4, 5 or 6, it is advantageous to utilise, in addition to pressure generated by a tool, lubrication, heat and moisture control of the tool, or just some of the means mentioned above. This achieves the best result.
Just a few preferred embodiments of the stiffening design have been described above. The examples are by no means restrictive, the preferred embodiments being variable within the scope of protection defined by the following claims.

Claims

Claims
1. A liquid package (1) made of cardboard for liquid storage, the package (1) comprising at least four vertical side walls (3, 4, 5, 6), a bottom (7) and a top portion (8) with the parts (3, 4, 5, 6, 7, 8) forming together a substantially closed structure, characterised in that at least one of the side walls (3, 4, 5, 6) has at least one design (2) for stiffening the side wall (3, 4, 5, 6).
2. A liquid package as defined in claim 1, characterised in that the stiffening design (2) comprises one or more recesses (9) and/or projections (13) in the otherwise planar side wall.
3. A liquid package as defined in claim 2, characterised in that the stiffening design (2) is shaped as a rectangle, square, polygon, circle, cross or any other geometrical form.
4. A liquid package as defined in claim 3, characterised in that the liquid package 1 is a rectangular prism.
5. A liquid package as defined in claim 3, characterised in that the liquid package 1 is a gable top package.
6. A method for producing a liquid package (1) made of cardboard, the method comprising the following steps a) - d):
a) manufacturing a blank (blanks) of cardboard for forming the liquid package (1),
(b) creasing and/or seaming a liquid package (packages) from the blank (blanks) with the package remaining capable of being filled,
(c) filling the liquid package (1) with a liquid,
d) closing the liquid package (1) by seaming or by means of a separate closing device,
characterised in that the method further comprises a step e) for:
e) producing in at least one side wall (3, 4, 5, 6) at least one stiffening design (2), which may be a recess (9) or a projection (13),
preferably before step b) or c).
7. A method as defined in claim 6, characterised in that the stiffening design (2) is produced by means of a pressing tool, such as a press, utilising pressure and heat.
8. A method as defined in claim 7, characterised in that lubrication and/or moisture control of the pressing tool is additionally employed in the production of the stiffen- ing design (2).
PCT/FI2004/000535 2003-09-25 2004-09-15 Fluid container made of cardboard and a method for producing a fluid container WO2005028319A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20031380A FI20031380A (en) 2003-09-25 2003-09-25 Liquid packaging of cardboard
FI20031380 2003-09-25

Publications (1)

Publication Number Publication Date
WO2005028319A1 true WO2005028319A1 (en) 2005-03-31

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ID=27839042

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2004/000535 WO2005028319A1 (en) 2003-09-25 2004-09-15 Fluid container made of cardboard and a method for producing a fluid container

Country Status (2)

Country Link
FI (1) FI20031380A (en)
WO (1) WO2005028319A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010011168A1 (en) * 2008-07-22 2010-01-28 Tetra Laval Holdings & Finance S.A. Means and method to provide embossments on packaging containers
WO2010128874A1 (en) * 2009-05-05 2010-11-11 Bessand A.I. Ltd Package with reinforced faces
JP2012086863A (en) * 2010-10-19 2012-05-10 Toppan Printing Co Ltd Paper container for liquid
EP2778085A1 (en) * 2013-03-11 2014-09-17 Offsetdruckerei Schwarzach GmbH Cardboard blank
JP2018052547A (en) * 2016-09-29 2018-04-05 株式会社トーモク Corrugated cardboard box and corrugated cardboard box manufacturing apparatus

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232516A (en) * 1963-11-08 1966-02-01 Ex Cell O Corp Paperboard container
US3286902A (en) * 1964-10-20 1966-11-22 Union Carbide Corp Rigid container
US3295739A (en) * 1965-05-14 1967-01-03 Phillips Petroleum Co Container
DE1939041A1 (en) * 1969-07-31 1971-02-04 Hassia Verpackung Ag Plastic foil folding container production - method
EP0027350A1 (en) * 1979-10-12 1981-04-22 Visymonde Investments Pte. Ltd. Containers and sleeves, especially containers and sleeves made by folding from sheet material
DE3222017A1 (en) * 1982-06-11 1983-12-15 Renkel, geb. Lutz, Hiltrud, 6107 Reinheim Container made of composite packaging material for a pasty, especially liquid material and process and device for the manufacture thereof
GB2181410A (en) * 1985-10-01 1987-04-23 Kenneth Neville Dorrington Sheet material for containers
DE4306236A1 (en) * 1993-02-27 1994-09-01 Tetra Laval Holdings & Finance Packaging for flowable filling goods and tubes as well as cutting for the production of the same
WO2002049834A1 (en) * 2000-12-19 2002-06-27 Korsnäs AB (publ) Container wall of paper and process for producing such a container wall

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232516A (en) * 1963-11-08 1966-02-01 Ex Cell O Corp Paperboard container
US3286902A (en) * 1964-10-20 1966-11-22 Union Carbide Corp Rigid container
US3295739A (en) * 1965-05-14 1967-01-03 Phillips Petroleum Co Container
DE1939041A1 (en) * 1969-07-31 1971-02-04 Hassia Verpackung Ag Plastic foil folding container production - method
EP0027350A1 (en) * 1979-10-12 1981-04-22 Visymonde Investments Pte. Ltd. Containers and sleeves, especially containers and sleeves made by folding from sheet material
DE3222017A1 (en) * 1982-06-11 1983-12-15 Renkel, geb. Lutz, Hiltrud, 6107 Reinheim Container made of composite packaging material for a pasty, especially liquid material and process and device for the manufacture thereof
GB2181410A (en) * 1985-10-01 1987-04-23 Kenneth Neville Dorrington Sheet material for containers
DE4306236A1 (en) * 1993-02-27 1994-09-01 Tetra Laval Holdings & Finance Packaging for flowable filling goods and tubes as well as cutting for the production of the same
WO2002049834A1 (en) * 2000-12-19 2002-06-27 Korsnäs AB (publ) Container wall of paper and process for producing such a container wall

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010011168A1 (en) * 2008-07-22 2010-01-28 Tetra Laval Holdings & Finance S.A. Means and method to provide embossments on packaging containers
WO2010128874A1 (en) * 2009-05-05 2010-11-11 Bessand A.I. Ltd Package with reinforced faces
JP2012086863A (en) * 2010-10-19 2012-05-10 Toppan Printing Co Ltd Paper container for liquid
EP2778085A1 (en) * 2013-03-11 2014-09-17 Offsetdruckerei Schwarzach GmbH Cardboard blank
JP2018052547A (en) * 2016-09-29 2018-04-05 株式会社トーモク Corrugated cardboard box and corrugated cardboard box manufacturing apparatus

Also Published As

Publication number Publication date
FI20031380A (en) 2005-03-26
FI20031380A0 (en) 2003-09-25

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