WO2001096185A2 - Tightening of bottom seam - Google Patents
Tightening of bottom seam Download PDFInfo
- Publication number
- WO2001096185A2 WO2001096185A2 PCT/FI2001/000529 FI0100529W WO0196185A2 WO 2001096185 A2 WO2001096185 A2 WO 2001096185A2 FI 0100529 W FI0100529 W FI 0100529W WO 0196185 A2 WO0196185 A2 WO 0196185A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- casing
- skirt
- end member
- package
- plastic material
- Prior art date
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
- B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
- B65D3/10—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by form of integral or permanently secured end closure
- B65D3/12—Flanged discs permanently secured, e.g. by adhesives or by heat-sealing
- B65D3/14—Discs fitting within container end and secured by bending, rolling, or folding operations
-
- 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
- B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
- B65D3/22—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines with double walls; with walls incorporating air-chambers; with walls made of laminated material
Definitions
- the present invention relates to a liquid package formed of a paperboard-based liquid packaging laminate comprising on at least one surface one or several plastic layers, and which comprises a cylindrical or truncated cone-like casing with an end member attached to at least one end of it, which end member is fitted inside the casing and comprises a skirt, turned so as to be parallel to the casing, onto which skirt the edge of the casing is folded, whereby the end member is attached to the casing by heat sealing the mentioned overlapping areas together.
- liquid packages are used more and more for packing liquid foods such as milk, juice, and wine.
- these liquid packages are made of pre- manufactured laminated packaging material, comprising a body layer made of paperboard, which is covered on at least one side and usually on both sides with thin gas- and liquid-tight thermoplastic layers, for example polyethylene layers.
- the sterility of the package is an essential factor considering the preservation of the liquid packed in the package. If even a small amount of bacteria is left in the package during filling, the result is that the preservation of the package, the so-called shelf life, decreases significantly. In the package described in the introductory paragraph, especially the seams between the casing and the bottom or the lid are places where sufficient sterilisation has proven to be problematic.
- the object of the present invention is to produce a package, whose sterilisation can be carried out more easily and reliably than before.
- the opening between the casing and the end member which is extremely difficult to sterilise, is filled with plastic material in accordance with the invention. In this way the liquids and steams used in the sterilisation need not penetrate into the opening because it is now closed.
- the plastic material closing the opening is plastic material flowed from the laminate material coating of the casing and the end member, at least mainly from the area of the opening. In this way no different material is needed to fill the joint, but a sufficient amount of material can be extracted from the inner layers of the liquid packaging laminate, especially from the seam area.
- Figure 2 shows a cross-section of the joint between the casing and the bottom in accordance with Figure 1 and Figure 3 shows a joint in accordance with Figure 2 on a larger scale.
- FIG. 1 shows by way of an example an embodiment of the liquid package in accordance with the invention.
- This package comprises a cylindrical or alternatively truncated cone-like casing 1, to which ends end members 2, 3 are attached.
- One of the end members is equipped with a closing strip 6 that covers the outlet 7.
- the material of both the casing 1 and the end member 2 and/or 3 attached to it is paperboard-based liquid packaging material, comprising on at least one side, i.e. in the ready-made package the surface inside the package, at least one layer of plastic material. If the barrier layer of the packaging laminate is an aluminium layer, there might be only one of the inner plastic layers, but if the barrier layer of the packaging laminate is ENOH, there are several plastic material layers, including this barrier layer.
- Figure 2 shows a cross-section from the bottom seam of the package in accordance with Figure 1, i.e. the seam between the casing 1 and the bottom 3.
- This seam is produced so that the bottom 3 is equipped with a skirt 4 turned perpendicular to its general plane, and this end member 3 is then inserted inside the end of the casing 1, so that the skirt 4 is pointing outwards.
- the edge 6 of the casing 1 is folded over the skirt 4.
- Seaming is carried out by heat sealing, clamping with hot clamp jaws the portion 6 of the casing 1 folded over the skirt 4 at a corresponding point against the portion 5 of casing 1 which is against skirt 4.
- a known container-forming apparatus such as the one described in Finnish patent application 981222 can be used. In it jaws similar to the ones described above, clamp the above mentioned areas 4,5,6 together, so that the plastic materials on their counter-surfaces melt and adhere to one another.
- Figure 3 shows on a larger scale the joint 8 in accordance with Figure 2.
- the seam structure in which the skirt 4 of the end member 3 is placed against the inner surface of the casing 1, is filled with plastic material 9 that closes the mouth of the narrowing opening between skirt 4 and casing 1.
- the narrow part of the opening be closed so that the remaining opening, i.e. the opening remaining from the plastic material 9 towards the interior of the package is wide enough for the substances used in sterilisation, such as hydrogen peroxide or hot steam, to penetrate easily into this wide opening.
- Plastic material 9 for the above mentioned joint is obtained most advantageously from the outer surface of the skirt 4 and inner plastic material layers of portion 5 of the casing 1 placed against it. These are fluxed to the upper edge of the opening, to point 8, by using such a compressive force and temperature in the pressing tool with which the seam is closed, that they cause the plastic materials of the above-mentioned area to flux into point 8.
- This can also be seen in the enlarged cross-section of Figure 3, in which at the point in question, the plastic material layers are clearly thinner than the plastic material elsewhere on the inner surfaces 10 and 11 respectively of the casing 1 and the bottom 3.
- the temperature of the clamp jaws needed for the fluxing of the plastic materials depends naturally on the plastic material to be fluxed, but it can be as high as 400°C.
- liquid package in accordance with the invention has been described above only by way of one exemplary embodiment and it is to be understood that some modifications can be made to it without diverging from the scope of protection defined by the attached claims. Therefore it is not excluded that the plastic material to be placed in the joint should be from elsewhere than from the layers of packaging laminates.
- a suitable, fairly thin ring or the like made of plastic material can be placed in the opening in the appropriate area of the casing and the end member, which ring would then be melted when closing the seam to fill the joint.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
- Package Closures (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001263987A AU2001263987A1 (en) | 2000-06-13 | 2001-06-05 | Tightening of bottom seam |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20001407 | 2000-06-13 | ||
FI20001407A FI109345B (en) | 2000-06-13 | 2000-06-13 | liquid Packaging |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001096185A2 true WO2001096185A2 (en) | 2001-12-20 |
WO2001096185A3 WO2001096185A3 (en) | 2002-03-28 |
Family
ID=8558551
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2001/000529 WO2001096185A2 (en) | 2000-06-13 | 2001-06-05 | Tightening of bottom seam |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2001263987A1 (en) |
FI (1) | FI109345B (en) |
WO (1) | WO2001096185A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023180251A1 (en) * | 2022-03-21 | 2023-09-28 | Sig Combibloc Services Ag | Liquid-tight container, methods for the production thereof, and uses |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3157339A (en) * | 1961-07-18 | 1964-11-17 | Continental Can Co | Paper cup with caulked bottom and method of making |
US3439590A (en) * | 1964-12-15 | 1969-04-22 | Maryland Cup Corp | Method for heat sealing |
US3547012A (en) * | 1967-02-16 | 1970-12-15 | Owens Illinois Inc | Two-piece plastic container and method of making same |
US3944126A (en) * | 1974-10-02 | 1976-03-16 | Phillips Petroleum Company | Container |
US4187768A (en) * | 1977-11-15 | 1980-02-12 | Nihon Dixie Company, Limited | Method for the manufacture of a paper container |
US4409045A (en) * | 1982-07-20 | 1983-10-11 | Maryland Cup Corporation | Method and apparatus for sealing the sidewall and bottom seam portions of two-piece containers during manufacture thereof |
-
2000
- 2000-06-13 FI FI20001407A patent/FI109345B/en not_active IP Right Cessation
-
2001
- 2001-06-05 WO PCT/FI2001/000529 patent/WO2001096185A2/en active Application Filing
- 2001-06-05 AU AU2001263987A patent/AU2001263987A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3157339A (en) * | 1961-07-18 | 1964-11-17 | Continental Can Co | Paper cup with caulked bottom and method of making |
US3439590A (en) * | 1964-12-15 | 1969-04-22 | Maryland Cup Corp | Method for heat sealing |
US3547012A (en) * | 1967-02-16 | 1970-12-15 | Owens Illinois Inc | Two-piece plastic container and method of making same |
US3944126A (en) * | 1974-10-02 | 1976-03-16 | Phillips Petroleum Company | Container |
US4187768A (en) * | 1977-11-15 | 1980-02-12 | Nihon Dixie Company, Limited | Method for the manufacture of a paper container |
US4409045A (en) * | 1982-07-20 | 1983-10-11 | Maryland Cup Corporation | Method and apparatus for sealing the sidewall and bottom seam portions of two-piece containers during manufacture thereof |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023180251A1 (en) * | 2022-03-21 | 2023-09-28 | Sig Combibloc Services Ag | Liquid-tight container, methods for the production thereof, and uses |
Also Published As
Publication number | Publication date |
---|---|
FI109345B (en) | 2002-07-15 |
FI20001407A (en) | 2001-12-14 |
AU2001263987A1 (en) | 2001-12-24 |
WO2001096185A3 (en) | 2002-03-28 |
FI20001407A0 (en) | 2000-06-13 |
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