EP0051568A1 - Deckel zum dichten Verschliessen eines Behälters - Google Patents

Deckel zum dichten Verschliessen eines Behälters Download PDF

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Publication number
EP0051568A1
EP0051568A1 EP81830179A EP81830179A EP0051568A1 EP 0051568 A1 EP0051568 A1 EP 0051568A1 EP 81830179 A EP81830179 A EP 81830179A EP 81830179 A EP81830179 A EP 81830179A EP 0051568 A1 EP0051568 A1 EP 0051568A1
Authority
EP
European Patent Office
Prior art keywords
cap portion
container
lid
plastics material
transverse wall
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.)
Withdrawn
Application number
EP81830179A
Other languages
English (en)
French (fr)
Inventor
Piergiacomo Guala
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.)
Gefit SRL
Original Assignee
Gefit SRL
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 Gefit SRL filed Critical Gefit SRL
Publication of EP0051568A1 publication Critical patent/EP0051568A1/de
Withdrawn legal-status Critical Current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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0435—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements
    • B65D41/045—Discs

Definitions

  • the present invention relates to a lid for sealingly closing containers in general, of glass or plastics material, particularly of the type with a comparatively large mouth and intended mainly for containing foodstuffs to be pasteurized or substances which generate a pressure within the container greater than the external pressure.
  • the lid to which the present invention relates is of the cap type made of plastics material resistant to mechanical forces and formed both with a wall arranged to extend transversely across the mouth of the container to be closed and with an annular side wall rigid with the transverse wall, the-cap being provided with fastening means for engagement with cooperating means carried by the outer surface of the neck of the container.
  • the seal between the lid and the mouth of the container is ensured by the presence of a washer of yielding material inserted in the cavity of the lid and optionally accommodated in a suitable groove in the lid top.
  • the sealing washer is formed as a piece separate from the remaining cap portion of the lid, it is not possible to avoid the penetration of a small quantity of product or other extraneous substances between the washer itself and the underlying transverse wall of the lid with the consequent formation of germs and dirt which eventually results in pollution of the product.
  • the object of the present invention is thus to avoid the formation of pol.lutents which, by coming into contact with the product, could cause it to deteriorate.
  • the problem which is at the root of the present invention is that of forming a lid which, on the one hand can ensure a good seal, both at high and low pressures and, on the other hand, avoids the possibility of pollution of the product placed in the container.
  • a lid of the type specified above which is characterised in that the cap portion, formed by moulding from a plastics material resistant to mechanical forces, includes a plate-like portion of yielding plastics material formed by moulding directly onto the inner surface of the transverse wall of the cap which faces towards the mouth of the container, the said yielding plastics material being compatible with that of the cap portion to form a unitary body.
  • the said material which is resistant to mechanical forces can be a type of propylene polymer, while the yielding material is an ethylene-propylene-type elastomer.
  • the plate-like portion of yeilding plastics material has a flexible annular lip projecting towards the interior of the cap portion of the lid, the lip being located peripherally in a position opposite the rim of the mouth of the container and being inclined to an axis perpendicular to the transverse wall of the cap portion.
  • the outer wall 3 of the neck 1 has a conventional screw-thread 4 for engagement by a complimentary-screw-thread 5 formed on the inner surface 6 of the side wall 7 of a cap portion indicated in its entirety by 8.
  • This cap portion has, on an internal surface 9 of the transverse wall 10, a plate-like part 11 with an annular lip 12 projecting inwardly of the lid itself.
  • This annular lip 12 is located peripherally in a position opposite the rim 13 of the neck 1.
  • the cap portion 8 of the lid that is to say,the side wall 7, the complimentary screw thread 5 and the transverse wall 10, is moulded from a plastics material,for example a polypropylene polymer, which is resistant to mechanical forces.
  • the plate-like part 11, with its annular.lip 12, is on the other hand, moulded from a yielding plastics material, such as an ethylene-propylene elastomer, which is compatible with the propylene polymer used for moulding the cap portion 8.
  • a yielding plastics material such as an ethylene-propylene elastomer, which is compatible with the propylene polymer used for moulding the cap portion 8.
  • the formation of the lid according to the invention is carried out by conventional double-moulding methods; one of the two parts is formed first, for example by injection into a suitable mould, and subsequently the other part is formed directly on the first, the material being changed.
  • a lid is formed as a unitary body totally free from any interstices between the surface 9 of the transverse wall 10 and the plate-like part 11.
  • the lip 12 is inclined to the axis X-X perpendicular to the transverse wall 10 so that its free edge faces the peripheral wall 7 of the cap portion 8.
  • This inclination allows the lid to be used in cases in which the interior of the container will be at a lower pressure than the external environment as occurs when the product is pasteurized.
  • annular lip 12 is inclined to the axis X-X at an inclination such that the free edge faces inwardly of the cap portion 8.
  • This conformation is particularly suitable for cases in which the interior of the container will be at a higher pressure than the external environment as occurs when aerated liquids or beverages are contained.
  • the invention further allows the use of coloured plastics material in the formation of the cap portion 8 withoutdanger of contamination of the product placed in the container since the presence of the plate-like part 11 stops any possible migration of the colouring substances to the product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
EP81830179A 1980-10-31 1981-10-01 Deckel zum dichten Verschliessen eines Behälters Withdrawn EP0051568A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT25699/80A IT1134128B (it) 1980-10-31 1980-10-31 Coperchio di chiusura per contenitori
IT2569980 1980-10-31

Publications (1)

Publication Number Publication Date
EP0051568A1 true EP0051568A1 (de) 1982-05-12

Family

ID=11217483

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81830179A Withdrawn EP0051568A1 (de) 1980-10-31 1981-10-01 Deckel zum dichten Verschliessen eines Behälters

Country Status (5)

Country Link
EP (1) EP0051568A1 (de)
AR (1) AR226227A1 (de)
AU (1) AU7622381A (de)
BR (2) BR8103542A (de)
IT (1) IT1134128B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0112103A3 (de) * 1982-12-14 1985-08-07 Charles A. Breskin Associates Inc Kunststoffschraubverschluss
EP0146011A3 (en) * 1983-12-13 1986-10-08 Ivo J. Hauser Container with lid
FR2593148A1 (fr) * 1986-01-22 1987-07-24 Retief Charles Fermeture pour recipients, et procede de fabrication d'une telle fermeture.
FR2631933A1 (fr) * 1988-05-30 1989-12-01 Astra Plastique Dispositif de bouchage hermetique
EP0278398A3 (en) * 1987-02-06 1990-02-07 Frank Schellenbach Method for making a gas-tight plastic closure for bottles and such-like receptacles
US6817479B1 (en) 1999-03-03 2004-11-16 Crown Cork & Seal Technologies Corporation Closure and a liner having a sealing flange with an inwardly directed unflattened fold

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3325576A (en) * 1964-02-03 1967-06-13 Kessler Milton Method of making unitary plastic sealing cap
DE1906003A1 (de) * 1968-02-09 1969-09-04 Grace W R & Co Verfahren zur Erzeugung von Dichtungen in Behaelterverschluessen aus Kunststoff
DE1544989B2 (de) * 1964-10-28 1972-06-29 W.R. Grace & Co., Cambridge, Mass. (V.StA.) Verfahren zur herstellung von dichtungen in behaelterverschluessen
GB1369415A (en) * 1972-01-21 1974-10-09 Aluminum Co Of America Method of producing closure liners from resin powders
DE2756372A1 (de) * 1977-01-28 1978-08-03 Owens Illinois Inc Futterloser verschluss
DE2758208A1 (de) * 1977-01-28 1978-08-03 Continental Group Verfahren zum herstellen von dichtungen in behaelterverschluessen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3325576A (en) * 1964-02-03 1967-06-13 Kessler Milton Method of making unitary plastic sealing cap
DE1544989B2 (de) * 1964-10-28 1972-06-29 W.R. Grace & Co., Cambridge, Mass. (V.StA.) Verfahren zur herstellung von dichtungen in behaelterverschluessen
DE1906003A1 (de) * 1968-02-09 1969-09-04 Grace W R & Co Verfahren zur Erzeugung von Dichtungen in Behaelterverschluessen aus Kunststoff
GB1369415A (en) * 1972-01-21 1974-10-09 Aluminum Co Of America Method of producing closure liners from resin powders
DE2756372A1 (de) * 1977-01-28 1978-08-03 Owens Illinois Inc Futterloser verschluss
DE2758208A1 (de) * 1977-01-28 1978-08-03 Continental Group Verfahren zum herstellen von dichtungen in behaelterverschluessen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0112103A3 (de) * 1982-12-14 1985-08-07 Charles A. Breskin Associates Inc Kunststoffschraubverschluss
EP0146011A3 (en) * 1983-12-13 1986-10-08 Ivo J. Hauser Container with lid
FR2593148A1 (fr) * 1986-01-22 1987-07-24 Retief Charles Fermeture pour recipients, et procede de fabrication d'une telle fermeture.
EP0278398A3 (en) * 1987-02-06 1990-02-07 Frank Schellenbach Method for making a gas-tight plastic closure for bottles and such-like receptacles
FR2631933A1 (fr) * 1988-05-30 1989-12-01 Astra Plastique Dispositif de bouchage hermetique
US6817479B1 (en) 1999-03-03 2004-11-16 Crown Cork & Seal Technologies Corporation Closure and a liner having a sealing flange with an inwardly directed unflattened fold

Also Published As

Publication number Publication date
BR8103542A (pt) 1982-08-24
AR226227A1 (es) 1982-06-15
IT1134128B (it) 1986-07-24
BR8106924A (pt) 1982-07-13
IT8025699A0 (it) 1980-10-31
AU7622381A (en) 1982-05-06

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19820503

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19830418

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GUALA, PIERGIACOMO