US3616033A - Method of producing a packaging container comprising a container body of thermoplastic material - Google Patents

Method of producing a packaging container comprising a container body of thermoplastic material Download PDF

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Publication number
US3616033A
US3616033A US758433A US3616033DA US3616033A US 3616033 A US3616033 A US 3616033A US 758433 A US758433 A US 758433A US 3616033D A US3616033D A US 3616033DA US 3616033 A US3616033 A US 3616033A
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US
United States
Prior art keywords
container body
container
tool
metal foil
lining
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
US758433A
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English (en)
Inventor
Anders Ruben Rausing
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.)
Sobrefina SA
Original Assignee
Sobrefina 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 Sobrefina SA filed Critical Sobrefina SA
Application granted granted Critical
Publication of US3616033A publication Critical patent/US3616033A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D25/00Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/14Linings or internal coatings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D11/00Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material
    • B65D11/02Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material of curved cross-section
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1002Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1028Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina by bending, drawing or stretch forming sheet to assume shape of configured lamina while in contact therewith
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1002Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1028Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina by bending, drawing or stretch forming sheet to assume shape of configured lamina while in contact therewith
    • Y10T156/1031Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina by bending, drawing or stretch forming sheet to assume shape of configured lamina while in contact therewith with preshaping of lamina
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1002Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1051Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina by folding
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17Surface bonding means and/or assemblymeans with work feeding or handling means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49906Metal deforming with nonmetallic bonding

Definitions

  • thermoplastic container is provided with a lining of metal foil coated with thermoplastic material which is folded or pleated to fit the container snugly and is heat sealed thereto. Suitable covers or lids are provided so that the final container is most suitable as to cost, weight, impermeability and finally as to customer appeal.
  • PATENTEDUET 26 men SHEET 2 BF 2 5 v g .1 a Q METHOD OF PRODUCING A PACKAGING CONTAINER COMPRISING A CONTAINER BODY OF THERMOPLASTIC MATERIAL
  • This invention is concerned with a method of producing a packaging container comprising a container body of thermoplastic material and a metal foil lining inserted into the container body.
  • the invention is further concerned with a device for carrying out the operation in accordance with the above and also with a packaging container produced in accordance with this method.
  • a throwaway package shall e.g., be inexpensive but it shall also be well suited to its contents, so that it protects the contents in the best way both mechanically and otherwise.
  • the package shall further appeal to the customer, i.e., the contents shall be easily accessible when the customer wants to make use of them. It shall further have a low weight and be well suited to storage in available spaces.
  • sheet metal is e.g., very impermeable and has very satisfactory mechanical strength.
  • the drawbacks of sheet metal packaging are that it is comparatively expensive and besides so strong mechanically that sheet metal packaging containers cannot be opened without the use of special aids in the shape of tin openers or keys. Glass packages in the shape ofjars or bottles have so far been the predominant method of packaging for aerated liquids, e.g., aerated drinks, beer, etc.
  • the invention is thus concerned with a method of producing a packaging container which comprises a container body of thermoplastic material and a metal foil lining inserted into the container body.
  • the invention is characterized by a blank, conveniently of round shape, of a metal foil coated with thermoplastic material being, by means of a tool, pressed into the said container body and by the plastic coating of the metal foil, at least along a continuous joint, being heat sealed to the container body around its opening.
  • the invention is further characterized by the blank, or roundel, being made to assume, through being folded, the shape of the container body, and by the said folding and shaping being brought about by the blank, through the application of vacuum, being sucked against the tool which has longitudinal grooves that facilitate the forma- Lion of the folds, the grooves being capable of connection to a source of vacuum.
  • Packaging containers which have been produced in accordance with the invention have the advantages of the con-- ventional cans, i.e., they have very satisfactory impermeability as a result of the incorporation of a metal foil layer in the wall of the container. They can also be made sufficiently stiff mechanically by surrounding the packaging container by e.g., a sleeve of cardboard or plastic. The package will be lighter than earlier conventional preserve packages, and also considerably easier to open, since it is possible to break through the walls of the package with a much simpler tool, or the package may quite simply be fitter with an opening device that makes a special opening tool unnecessary.
  • FIG. I shows two views of a vacuum tool in partial section
  • FIG. 2 shows the thermoplastic container body which has been placed in a; holder and is ready to receive the metal lina
  • FIG. 3 shows how the metal lining is inserted into the container body
  • FIG. 4 shows a cross section of the completed packaging container and finally FIG. 5 shows a flat blank which is to be inserted into the conical top portion of the container.
  • container body thus refers in this case to a preproduced hollow body of thermoplastic material.
  • the layer of metal foil inserted into the container body is termed lining", the container body and the lining together forming a packaging container that may in a suitable manner be provided with some kind of closure covering the opening of the container.
  • FIG. I shows a partial section of a folding tool 3 which consists of a cylindrical portion and a curved bottom portion.
  • the tool has a number of pleating grooves 5 which extend parallel along the cylindrical portion and towards the center part of the bottom portion, which grooves through ducts 9 are connected to the inside of the tool, which in turn is connected to a source of vacuum or ofgas under pressure by means of tube 7.
  • the upper portion of the tool shown is covered by a sheet 6 around the outside edge of which there is fitted a ring-shaped welding unit 8.
  • the preproduced container body 11 shown in FIG. 2 is inserted into an outer holder 13 which supports the sides of container body 11, the outward-folded flange I2 of container body 11 being preferably made to rest on the top of holder 13.
  • the material from which the lining is to be made consists of preproduced roundels l of metal foil, preferably aluminum foil, coated with thermoplastic, the coating consisting of a layer 2 of polyethylene or polypropylene, or some varnish that is suitable for lamination.
  • the lining operation is begun by the inside of tool 3 through tube 7 being connected to a source of vacuum and by the tool being thereafter brought in contact with a preproduced lining blank. This preferably done by the tool being lowered towards a pile of plastic-coated roundels of aluminum foil. When the center portion of the tool has come into surface contact with the uppermost roundel in the pile, this is attached by suction to the tool by means of suction hole I0. Tool 3 can now be lifted up and will then take with it the uppermost roundel in the pile. While the inside of the tool 3 is still connected to a source of vacuum, the tool is positioned above the container body 11 inserted into holder 13 and is lowered into this.
  • the plastic layer 2 of lining l is welded to container body 1 1 along a continuous sealing zone 17 in the vicinity of the opening of container body 11.
  • This welding or sealing of the plastic layer 2 of lining 1 to container body 11 is carried out with the aid of the ring-shaped sealing unit 8 fitted around the upper part of tool 3.
  • the welding operation may be effected by heat being produced in the sealing unit, and by this heat being then conducted by way of the metal foil layer to the plastic layer and to the wall of container body 11, and by so much heat being supplied that the plastic layer 2 of the lining is fused with the inner surface of the container body 11.
  • the heat required for this fusion may also be produced by means of ultrasonic waves or by high-freqency methods.
  • the choice of the welding method used depends on the properties of the material. Thus, it may sometimes be difficult to conduct a sufficiently large quantity of heat through a metal foil layer, since the cooling area of the metal foil is large. High-frequency welding would also seem not to be directly applicable to the sealing of a laminate comprising a layer of metal foil, since the heat quantity produced tends to be concentrated to the layer of metal foil.
  • the most suitable welding method in the present case is probably ultrasonic welding, i.e., mechanical oscillations of ultrasonic frequency are generated in sealing unit 8 which is then brought into contact with the laid-up material layers which are to be welded together; or also impulse sealing, i.e., sealing with the aid of a unit that by means of impulses of current is heated to scaling temperature.
  • the heat generated in the plastic material shall be sufficient for the materials to be welded together into an impermeable and homogeneous joint.
  • the packaging container ie, the container body 11 provided with the lining, that has been formed can be closed by a thin sheet of material being placed over the opening of the container and welded to the flange 12 of the container body.
  • this cover shall have the same impermeability as the rest of the packaging container, it should also contain a layer of metal foil.
  • the cover material is provided with a coating of plastic which can be welded against the upper side of flange 12.
  • the closure of the packaging container may also be effected by the opening of the container body 11 being covered, by means of a conical or hemispherical part that has a flange corresponding to flange 12 of the container body, being placed over the opening of the container body in such a way that the flanges coincide.
  • the two flanges can now be welded together. a bottle-shaped container being obtained.
  • the packaging container with the conical upper part 16, shown in FIG. 4 should be provided with a lining is of metal foil, which is sealed to the conical part 16 along continuous weld joints 17, the conical part being preferably of the same material as the container body 1 1.
  • the metal foil linin 15 can in the case of the packaging container shown in FIG. be made as a flat or:-
  • the constructional example of the invention shown here is only intended as an illustration of the idea behind the invention, and it is thus possible, within the framework of the invention, to modify both the shape of the container body and the shape of the part 16 covering the opening of the container body.
  • the invention has proved to be very valuable and is the first solution that we know of, of the problem of obtaining the same impermeability characteristics in a packaging container of plastic as in packaging container of sheet metal or glass known earlier.
  • a method for producing containers comprising pressing a blank of metal foil into a thermoplastic container body having a cylindrical body portion, a spherical bottom portion and top circular opening, said pressing being carried out by means of a mandrellike tool having a plurality of grooves extending axially along the cylindrical outer surface thereof and towards the center at a bottom spherical portion thereof, said metal foil being coated with a thermoplastic material on the outer side thereof facing the thermoplastic container body, applying a vacuum to the inner side of the blank of metal foil through openings in the grooves in the walls of the tool to shape the blank of metal foil to the tool and to shape the blank to the container body by creating axial folds in the foil in the grooves of the tool, subsequently applying pressure to the inner side of the blank of metal foil through openings in the grooves in the walls of the tool while rotating the tool about is axis so as to release the blank from the tool while overlapping at least a portion of each of the axial folds and while positioning the blank within the container body, and heat-s

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Laminated Bodies (AREA)
US758433A 1967-09-25 1968-09-09 Method of producing a packaging container comprising a container body of thermoplastic material Expired - Lifetime US3616033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE13129/67A SE332508B (ja) 1967-09-25 1967-09-25

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US3616033A true US3616033A (en) 1971-10-26

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US758433A Expired - Lifetime US3616033A (en) 1967-09-25 1968-09-09 Method of producing a packaging container comprising a container body of thermoplastic material
US00125348A Expired - Lifetime US3728196A (en) 1967-09-25 1971-03-17 Apparatus for producing a packaging container comprising a container body of thermoplastic material and a metal foil lining inserted into the container body

Family Applications After (1)

Application Number Title Priority Date Filing Date
US00125348A Expired - Lifetime US3728196A (en) 1967-09-25 1971-03-17 Apparatus for producing a packaging container comprising a container body of thermoplastic material and a metal foil lining inserted into the container body

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US (2) US3616033A (ja)
FR (1) FR1580086A (ja)
SE (1) SE332508B (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192701A (en) * 1977-07-14 1980-03-11 Brushaber Larry R Double wall plastic article and method and apparatus for forming a double wall plastic article with a pair of thermoplastic sheets
US6146124A (en) * 1996-06-25 2000-11-14 Thermogenesis Corp. Freezing and thawing bag, mold, apparatus and method
US6213334B1 (en) 1996-09-05 2001-04-10 Baxter International Inc Flexible, three-dimensional containers and methods for making them
US6361642B1 (en) 1997-12-02 2002-03-26 Baxter International Inc. Heat and pressure-formed flexible containers
US6808675B1 (en) 1996-06-25 2004-10-26 Thermogenesis Corp. Freezing and thawing bag, mold, apparatus and method

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1378945A (en) * 1972-03-21 1975-01-02 Shell Int Research Apparatus and method for moulding hollow articles from thermoplastics sheet
US3963556A (en) * 1973-07-03 1976-06-15 The United States Of America As Represented By The Secretary Of The Army Mortar cavity lining
US4021286A (en) * 1974-11-22 1977-05-03 Owens-Illinois, Inc. Apparatus for producing shrunken pilfer-proof neck labels for containers
US4021285A (en) * 1974-11-22 1977-05-03 Owens-Illinois, Inc. Apparatus for producing shrunken pilfer-proof neck labels for containers
US4025381A (en) * 1974-11-22 1977-05-24 Owens-Illinois, Inc. Apparatus for producing shrunken pilfer-proof neck labels for containers
US4018644A (en) * 1974-11-22 1977-04-19 Owens-Illinois, Inc. Apparatus for producing shrunken pilfer-proof neck labels for containers
JPS5833813B2 (ja) * 1977-12-19 1983-07-22 東洋ガラス株式会社 プラスチツクスリ−ブの製造方法および装置
KR900000402B1 (ko) * 1985-10-12 1990-01-25 한국과학 기술원 고강도 및 고인성 마르에이징강
US4795034A (en) * 1986-11-10 1989-01-03 W. R. Grace & Co. Non-smear food package
GB2245677B (en) * 1990-07-02 1993-09-01 British Gas Plc Splittable die

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192701A (en) * 1977-07-14 1980-03-11 Brushaber Larry R Double wall plastic article and method and apparatus for forming a double wall plastic article with a pair of thermoplastic sheets
US6146124A (en) * 1996-06-25 2000-11-14 Thermogenesis Corp. Freezing and thawing bag, mold, apparatus and method
US6232115B1 (en) 1996-06-25 2001-05-15 Thermogenesis Corp. Freezing and thawing bag, mold, apparatus and method
US6808675B1 (en) 1996-06-25 2004-10-26 Thermogenesis Corp. Freezing and thawing bag, mold, apparatus and method
US6213334B1 (en) 1996-09-05 2001-04-10 Baxter International Inc Flexible, three-dimensional containers and methods for making them
US6361642B1 (en) 1997-12-02 2002-03-26 Baxter International Inc. Heat and pressure-formed flexible containers

Also Published As

Publication number Publication date
US3728196A (en) 1973-04-17
FR1580086A (ja) 1969-08-29
SE332508B (ja) 1971-02-08
DE1782577A1 (de) 1972-03-02

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