EP0796199B1 - Verfahren zum füllen eines verpackungsbehälters - Google Patents

Verfahren zum füllen eines verpackungsbehälters Download PDF

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Publication number
EP0796199B1
EP0796199B1 EP95943367A EP95943367A EP0796199B1 EP 0796199 B1 EP0796199 B1 EP 0796199B1 EP 95943367 A EP95943367 A EP 95943367A EP 95943367 A EP95943367 A EP 95943367A EP 0796199 B1 EP0796199 B1 EP 0796199B1
Authority
EP
European Patent Office
Prior art keywords
container
deformable
lid
set forth
sealing
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
EP95943367A
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English (en)
French (fr)
Other versions
EP0796199A1 (de
EP0796199A4 (de
Inventor
Masamichi Kaneko
Hidetoshi Konno
Junichi Satoyoshi
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
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 Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Publication of EP0796199A1 publication Critical patent/EP0796199A1/de
Publication of EP0796199A4 publication Critical patent/EP0796199A4/de
Application granted granted Critical
Publication of EP0796199B1 publication Critical patent/EP0796199B1/de
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B3/04—Methods of, or means for, filling the material into the containers or receptacles

Definitions

  • This invention relates to a method of filling a packaging container according to the features of the precharacterizing part of claim 1.
  • a filling apparatus of a rotary type is generally used for this purpose.
  • Such filling apparatus include a turntable on which the container is placed and is displaced by rotation of the turntable.
  • the filling apparatus also includes a charging station and a sealing station. In the charging station, a liquid food is charged in the container through a top opening of the container. In the sealing portion, the top end of the container is sealed with a lid.
  • the container on the turntable after having been filled with the liquid food in the charging station, is displaced to the sealing station with the top end remaining opened. Since the turntable rotates at a relatively high speed to accelerate the filling operation, the liquid food contained in the container is sometimes spilled from the opening due to vibration, etc.
  • a container having a top end that is located at a predetermined height above the level of the liquid food charged in the container so that a head space is defined in an upper portion of the container. It is typical to use an intruding lid member, i.e., a lid having a portion that intrudes into the packaging container, to effect full filling.
  • US-A-3,590,557 discloses a method of filling a packaging container with the features of the precharacterising part of claim 1. It discloses an apparatus for closing packaging containers with elastically deformable walls. Such a packaging container is filled with a liquid and push-in rollers are used for raising the level of the liquid filled in the container. Overflow should be avoided. By the push-in roller a container wall is deformed to temporarily reduce the volume of the container and to reduce the content of oxygen.
  • the deformation or depression of the container wall is maintained, at least in part, concurrently with the heat-sealing step in which step a heat seal device produces a seal seam when the temporary depression of the packaging container has reached an upper limit.
  • JP 01070305 discloses a sealing method and device for a container.
  • the bending portion as part of a bottom of the container is deformed inwardly. Accordingly, the inside volume of the container body is decreased compared with the original form. In such condition the container body is sealed by a lid.
  • the container body is taken out a decompressed condition in its inside results because of recovery to the original form due to the restoring force of the formally inwardly bent portion.
  • the deformable wall portion includes a bellows portion preferably in the form of a plurality of curved wave forms or a plurality of saw teeth wave forms and the deformation of the deformable wall portion includes inwardly pressing a substantially flat portion of the container which is provided inside of the deformable wall portion.
  • the deformable portion of the container is deformed to elevate the surface of the liquid food to a level adjacent to the top end of the container.
  • the deformable portion When the container is disposed at a filling station of a turntable and is filled with for example a liquid food the deformable portion has not been deformed to decrease the volume of the container, for example by pushing upward a substantially flat portion in the bottom of the container, a space is defined between the liquid level of the liquid food and the top end of the container.
  • the container is then displaced on the turntable to a sealing station where the top end of the container is sealed with a lid. Since the space defined between the liquid level of the liquid food and the top end of the container is retained during the displacement of the container from the filling station to the sealing station, the liquid food does not overflow from the opening by vibration etc., even when the turntable is rotated at a relatively high speed. As a consequence, the overall filling operation can be performed at a high speed.
  • the deformable portion In the sealing stage, the deformable portion is deformed, for example pushed upward, and thereby elevates the level of the liquid food to a level adjacent to the top end of the container, and is also urged in the opposite direction, for example downward, as the container is sealed with the lid.
  • the deformable portion since a negative pressure is created in the container, the deformable portion is maintained in the deformed position, for example the bottom portion is maintained in the upwardly displaced position.
  • the negative pressure in the container is lost so that the deformable portion is moved to the undeformed position, for example the bottom portion is moved to a lowered position.
  • whether the container is properly sealed can be determined by checking whether or not the deformable portion is in the deformed position, for example the bottom portion is the upwardly displaced position.
  • the creation of the negative pressure in the container can prevent an excessive force to be applied to the sealed portion and to the container upon the sealing of the lid to the container, such as where resins are fused.
  • a packaging container is shown in FIGS. 2-4 and includes a container 11 that may be used for containing, e.g, a liquid food.
  • the container 11 is preferably formed of a transparent thermoplastic material having good gas barrier properties and having a cup-like shape which is open at its upper end.
  • the container 11 is preferably formed by deforming a multilayer resin sheet by a tip expanding method (Cuspation Dilation forming method) involving thermal molding of the sheet into the cup-like shape.
  • the container 11 is preferably bonded to a substantially cylindrical sleeve 12 during the tip expansion forming of the container.
  • the multilayer sheet is formed by an appropriate method such as coextrusion molding, blown film molding, etc.
  • the container 11 is preferably composed of a body portion 11a having a cylindrical cross-section, a radially outwardly extending flange portion 11b provided at an upper end of the body portion 11a and a bottom portion 11c formed at a lower end of the body portion 11a.
  • the container 11 preferably has a wall provided with a deformable portion so that the inside volume thereof can be changed.
  • the bottom portion 11c includes a bellows portion P1 formed at a position adjacent to the lower end of the body portion 11a and a flat portion P2 formed at a position radially inward of the bellows portion P1.
  • the inside volume of the container 11 may be changed.
  • the bellows portion P1 includes curved wave forms P1a and P1b which extend obliquely such that the curved wave form on the radially inward side is positioned at a level higher than the radially outward side wave form.
  • the multilayer sheet is preferably molded after having been heated to about 180°C, which is higher than the melting point of at least one layer of the sheet. It is therefore not necessary to sterilize the container 11 before filling the liquid food therein. Further. the container 11 is not shrunk or deformed due to molecular orientation during the retort stage.
  • the thermal molding method is any suitable method such as a vacuum blow molding method or a pressure blow molding method.
  • the structure of the multilayer sheet may be, for example, as shown below: PP(polypropylene)/adhesive layer/EVOH (copolymer of ethylene vinyl alcohol)/adhesive layer/regenerated PP.
  • EVOH ethylene glycol
  • layer structure can improve the gas barrier property of the multilayer sheet.
  • layer structures may also be adopted:
  • the sleeve 12 which is preferably formed of a material having greater rigidity and a better heat insulating properties than the container 11 is preferably provided around the outer side of the container 11.
  • the sleeve 12 has a cylindrical shape and serves to retain the shape of the container 11 and to function as a heat insulator for preventing heat transfer between the liquid food contained in the container 11 and the outside atmosphere.
  • the container 11 and the sleeve 12 form a double wall structure.
  • the sleeve 12 is preferably first prepared and the container 11 is then formed by the tip expansion method within the sleeve 12.
  • the liquid food is then filled in the container 11 and the container is sealed with the lid 13.
  • the container 11 may be first formed by a thermal molding method and then be fitted into the sleeve 12.
  • the liquid food is then filled in the container 11 and the container is sealed with the lid 13.
  • the container 11 may be first formed by a thermal molding method, the liquid food may then be filled in the container 11, the container may then be sealed with the lid 13, and the container may then be fitted into the sleeve 12.
  • the sleeve 12 is preferably formed of expanded polypropylene.
  • the diameter of pores formed by expansion is about 150 ⁇ m.
  • the expanded polypropylene may be substituted by a laminate having a polypropylene layer and an expanded polypropylene layer or by a paper material. In this case, printing may be provided on the surface of the polypropylene layer or paper material.
  • the sleeve 12 is preferably formed of a transparent material so that the liquid food contained in the container 11 can be viewed.
  • the lid 13 is fixed on the upper surface of the flange portion 11b by sealing means such as heat sealing or ultrasonic sealing to seal the container 11.
  • the resin film constituting the lid member 13 is preferably molded by the coextrusion method or the blown film molding method to have a thickness of 30-50 ⁇ m.
  • the layer structure of the resin film is preferably formed by the coextrusion method may be, for example, as follows: PP/adhesive layer/EVOF/adhesive layer/PP.
  • the lid 13 may, according to another embodiment, be in the form of a transparent resin plate having a high gas barrier property.
  • a resin plate may be formed by a suitable method such as molding by a hot press method, an injection molding method or the like.
  • a pour opening 13a for pouring the liquid food contained in the container 11 therethrough is formed in a predetermined portion of the lid 13 and is sealed with a pull tab 15.
  • the pull tab 15 is preferably formed of a material having good gas barrier properties and high rigidity and tensile strength.
  • the pull tab 15 may be colored.
  • the layer structure of the pull-tab 15 may be, for example, as follows: Biaxially oriented PP/peelable adhesive layer.
  • a glossy film 16 formed of a heat-shrinkable material is preferably provided on an outer surface of the sleeve 12.
  • the film is printed with desired letters and patterns.
  • the film 16 is preferably a stretched PP film having a thickness of less than 20 ⁇ m. When prints are formed on the surface of the sleeve 12, the film is not required.
  • the packaging container has a double wall structure composed of the container 11 and the sleeve 12, however, the packaging container may be formed by the container 11 only, if desired.
  • FIG. 1 shows a step of sealing a container 11 with a lid 13 according to a first embodiment of the present invention.
  • FIG. 5 shows a liquid food charging step according to the first embodiment of the present invention.
  • FIG. 6 shows a lid setting step according to the first embodiment of the present invention.
  • FIG. 7 shows the first stage of the step of sealing the container with the lid according to the first embodiment of the present invention.
  • FIG. 8 shows the second stage of the step of sealing the container with the lid according to the first embodiment of the present invention.
  • FIG. 9 is a sectional view of a container in the first embodiment of the present invention.
  • the sleeve 12 (FIG. 2) is not illustrated in the Figures showing the steps in the performance of the method.
  • the container 11 is fed to a feeding station of a turntable (not shown) and is transferred to a charging station by the rotation of the turntable.
  • a feeding pipe 31 of a charger for feeding a measured amount of liquid food to the container 11 is disposed above the container.
  • the liquid food is preferably charged so that there is defined a space ⁇ between the liquid level and an upper end of the container 11.
  • the container is then transferred to a lid setting station where a lid applicator (not shown) operates to set a lid 13 above the container 11 as shown in FIG. 6.
  • a lid applicator (not shown) operates to set a lid 13 above the container 11 as shown in FIG. 6.
  • the container 11 is transferred to a sealing station where, as shown in FIG. 7, the lid 13 is placed on an upper edge (preferably the flange portion 11b as seen in FIG. 2) of the container 11, or the sleeve 12, if provided.
  • a sealing device 32 is disposed above the lid 13 and a pusher 33 is disposed beneath the lid 13.
  • the head space is defined in the upper part of the container so that, even when the turntable is rotated at a relatively high speed, the overflowing of the liquid food contained therein from the opening due to vibration, etc. is prevented.
  • the filling operation can be performed at a high speed.
  • the sealing device 32 is then lowered, as shown in FIGS. 1 and 8, to press the peripheral edge of the lid 13 to an upper edge of the container 11 and to seal the container 11 with the lid 13.
  • the pusher 33 is moved upward to push the flat portion P2 of the bottom portion 11c of the container 11.
  • the bellows portion P1 is extended to move the flat portion P2 upward, so that the liquid level of the liquid food is elevated to the upper end of the container 11.
  • the sealing device is then moved upward and the pusher 33 is moved downward, whereby the sealing of the container 11 with the lid 13 is completed as shown in FIG. 9.
  • the flat portion P2 of the bottom portion 11c is urged to move downward.
  • the flat portion P2 is maintained in the upwardly displaced position.
  • the negative pressure within the container 11 is not established so that the flat portion P2 is displaced downward. Therefore, by checking whether or not the flat portion P2 is maintained in the upwardly displaced position, it is possible to determine whether or not the sealing of the container is appropriate.
  • FIG. 10 shows a bottom portion of a packaging container of a second embodiment of the present invention
  • FIG. 11 is a sectional view of a bottom portion of a packaging container of a third embodiment of the present invention
  • FIG. 12 is a sectional view of a bottom portion of a packaging container of a fourth embodiment of the present invention
  • FIG. 13 is a sectional view of a bottom portion of a packaging container of a fifth embodiment of the present invention.
  • the bellows portion P1 includes a plurality of curved wave forms P1c and P1d which extend obliquely such that the curved wave form on the radially inward side is positioned at a level slightly higher than the outward side one.
  • the bellows portion P1 includes a plurality of saw teeth wave forms P1e and P1f which extend obliquely such that the saw tooth wave form on the radially inward side is positioned at a level higher than the outward side one.
  • the bellows portion P1 includes a plurality of curved wave forms P1g and P1h which extend horizontally in the radially inward direction.
  • the bellows portion P1 includes a plurality of saw teeth wave forms P1i and P1j which extend obliquely such that the saw tooth wave form on the radially inward side is positioned at a level slightly higher than the outward side one.
  • the position of the flat portion P2 is slightly higher than that of the lower end of a sleeve 12. Therefore, when the packaging container is placed on a table or other flat surface, there is defined a heat insulating space between the bottom portion 11c and the table.
  • FIGS. 14A-14C illustrate steps in sealing of a container 11' in which the container has a deformable portion 14' in the side wall.
  • FIG. 15 illustrate steps in sealing of a container 11" in which the container has a deformable portion 14" in the side wall.
  • the methods of sealing a container shown in FIGS. 14A-14C and 15A-15C all involve a first step (not shown) of filling a container to a level below the top of the container at a filling station, moving the container to a sealing station where a lid is positioned above the container (FIGS. 14A, 15A), deforming the deformable portions of the packaging containers so that the liquid level in the containers is raised (FIGS. 14B, 15B), and sealing the lids to the containers (FIGS. 14C, 15C).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closing Of Containers (AREA)
  • Basic Packing Technique (AREA)

Claims (11)

  1. Verfahren zum Befüllen eines Verpackungsbehälters mit den folgenden Schritten:
    Einfüllen einer Flüssigkeit in einen Behälter (11) durch eine Öffnung am oberen Ende des Behälters bis zu einem Pegel unterhalb des oberen Endes des Behälters, wobei der Behälter einen deformierbaren Wandbereich (P1; 11'; 11") aufweist, der deformierbar und wiederherstellbar ist, so dass der Behälter einen deformierten Zustand einnehmen kann, in dem der Wandbereich deformiert ist, und in einen undeformierten Zustand rückstellbar ist, in dem der Wandbereich undeformiert ist, um eine Justierung des Innenvolumens des Behälters zu ermöglichen;
    Deformieren des deformierbaren Wandbereichs (P1; 11'; 11') des Behälters zum Anheben der Flüssigkeit über den ersten Pegel; und
    Abdichten eines Deckels (13) auf der Öffnung des Behälters, während der deformierbare Wandbereich (11a, 11c) deformiert ist, wobei ein Unterdruck in dem Behälter nach Abdichten des Deckels am Behälter erzeugt wird, und der deformierbare Wandbereich in einem Bereich einer Wand des Behälters vorgesehen ist,
    dadurch gekennzeichnet,
    dass der deformierbare Wandbereich einen Balgbereich vorzugsweise in Form einer Vielzahl von gekrümmten Wellenformen (P1a, P1b; P1c, P1d; P1g, P1h; 14'; 14") oder eine Vielzahl von Sägezahnformen (P1e, P1f; P1i, P1j; 14'; 14") aufweist und das Deformieren des deformierbaren Wandbereichs ein Einwärtsdrücken eines im wesentlichen flachen Bereichs des Behälters umfasst, der innerhalb des deformierbaren Wandbereichs vorgesehen ist.
  2. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet,
    dass der Deformierschritt während des Abdichtschrittes durchgeführt wird.
  3. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet,
    dass der Deformierschritt vor dem Abdichtschritt durchgeführt wird.
  4. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet,
    dass der Behälter zum Anheben der Flüssigkeit bis zum oberen Ende des Behälters (11) deformiert wird.
  5. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet,
    dass während des Deformierschritts ein Deformierbauteil den im wesentlichen flachen Bereich des Behälters zum Deformieren des deformierbaren Bereichs kontaktiert.
  6. Verfahren nach Anspruch 5.
    dadurch gekennzeichnet,
    dass das Deformierbauteil (33) einen Bodenbereich des Behälters (11) zum Deformieren des deformierbaren Bereichs in einer Bodenwand des Behälters kontaktiert.
  7. Verfahren nach Anspruch 5,
    dadurch gekennzeichnet,
    dass das Deformierbauteil (33) einen Bodenbereich des Behälters (11) zum Deformieren des deformierbaren Bereichs in einer Seitenwand des Behälters kontaktiert.
  8. Verfahren nach Anspruch 5,
    dadurch gekennzeichnet,
    dass das Deformierbauteil (33) einen Seitenbereich des Behälters (11) zum Deformieren des deformierbaren Bereichs in einer Seitenwand des Behälters kontaktiert.
  9. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet,
    dass der Behälter (11) an einer Hülse (12) befestigt ist mit einem Bodenende, einem flachen Bereich und einer Vielzahl von gekrümmten oder Sägezahnformen, die im wesentlichen in Höhe eines Bodenendes der Hülse vor Deformation des deformierbaren Bereichs angeordnet sind.
  10. Verfahren nach Anspruch 9,
    dadurch gekennzeichnet,
    dass der flache Bereich (P2) und die Vielzahl von gekrümmten oder Sägezahnformen (P1a,b) so angeordnet sind, dass bei Abdichten des Deckels (13) auf dem Container (11) der flache Bereich oberhalb des Bodenendes der Hülse angeordnet ist.
  11. Verfahren nach Anspruch 9,
    dadurch gekennzeichnet,
    dass der flache Bereich (P2) und die Vielzahl von gekrümmten oder Sägezahnformen (P1a,b) so angeordnet sind, dass bei Abdichten des Deckels (13) auf dem Behälter (11) der flache Bereich im wesentlichen in gleicher Höhe wie der Boden der Hülse angeordnet ist.
EP95943367A 1994-12-05 1995-12-05 Verfahren zum füllen eines verpackungsbehälters Expired - Lifetime EP0796199B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP301049/94 1994-12-05
JP30104994 1994-12-05
JP30104994A JP3644992B2 (ja) 1994-12-05 1994-12-05 包装容器の充填方法
PCT/US1995/015751 WO1996017772A1 (en) 1994-12-05 1995-12-05 Method of filling a packaging container

Publications (3)

Publication Number Publication Date
EP0796199A1 EP0796199A1 (de) 1997-09-24
EP0796199A4 EP0796199A4 (de) 1999-01-20
EP0796199B1 true EP0796199B1 (de) 2001-02-21

Family

ID=17892250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95943367A Expired - Lifetime EP0796199B1 (de) 1994-12-05 1995-12-05 Verfahren zum füllen eines verpackungsbehälters

Country Status (5)

Country Link
EP (1) EP0796199B1 (de)
JP (1) JP3644992B2 (de)
AU (1) AU4464796A (de)
DE (1) DE69520154T2 (de)
WO (1) WO1996017772A1 (de)

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US5060453A (en) * 1990-07-23 1991-10-29 Sewell Plastics, Inc. Hot fill container with reconfigurable convex volume control panel
JP2578668Y2 (ja) * 1992-03-06 1998-08-13 四国化工機株式会社 容器の密封装置

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US9993098B2 (en) 2011-06-17 2018-06-12 Berry Plastics Corporation Insulated container with molded brim
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Also Published As

Publication number Publication date
DE69520154D1 (de) 2001-03-29
EP0796199A1 (de) 1997-09-24
AU4464796A (en) 1996-06-26
JP3644992B2 (ja) 2005-05-11
WO1996017772A1 (en) 1996-06-13
EP0796199A4 (de) 1999-01-20
DE69520154T2 (de) 2001-06-21
JPH08156904A (ja) 1996-06-18

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