EP0069085A1 - Improved liquid-tight fastener, especially for cans - Google Patents

Improved liquid-tight fastener, especially for cans Download PDF

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Publication number
EP0069085A1
EP0069085A1 EP82830162A EP82830162A EP0069085A1 EP 0069085 A1 EP0069085 A1 EP 0069085A1 EP 82830162 A EP82830162 A EP 82830162A EP 82830162 A EP82830162 A EP 82830162A EP 0069085 A1 EP0069085 A1 EP 0069085A1
Authority
EP
European Patent Office
Prior art keywords
cap
fastener
port
ring
cans
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.)
Granted
Application number
EP82830162A
Other languages
German (de)
French (fr)
Other versions
EP0069085B1 (en
Inventor
Giovanni Mantovani
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.)
Dox Al Italia SpA
Original Assignee
Dox Al Italia SpA
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 Dox Al Italia SpA filed Critical Dox Al Italia SpA
Priority to AT82830162T priority Critical patent/ATE22047T1/en
Publication of EP0069085A1 publication Critical patent/EP0069085A1/en
Application granted granted Critical
Publication of EP0069085B1 publication Critical patent/EP0069085B1/en
Expired 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
    • B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
    • B65D53/02—Collars or rings
    • 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
    • B65D41/28—Caps combined with stoppers

Definitions

  • This invention relates to an improved liquid-tight fastener for cans, which comprises the can filling port, a cap provided upperly with a sealing surface and an annular projection, and finally a ring nut.
  • a liquid-tight seal must be able to be attained even with cans produced by economical moulding means, i.e. starting from a plastics tube which is hot-deformed with compressed air in a suitable mould, until it takes the form of the mould.
  • the resultant filling ports have fairly thin walls, an irregular thread and a high tendency to liquid loss through the fastener, when relatively low pressures are exceeded.
  • a cap provided upperly with a sealing surface, and with an annular projection; the cap is inserted into the can filling port and a ring nut is then screwed over the filling port after positioning an 0-ring at the end of the port.
  • the 0-ring is preferably of nylon.
  • the ring nut and cap can be of suitable thermoplastic material, for example nylon, or can be of metal.
  • the filling port has been designed for the simultaneous patent application in the name of the present applicant entitled: "Containers for distributors of liquids for spraying on to hay and other agricultural products", and for this reason 1 ⁇ 4" male threaded connectors are shown for the compressed air 5 and for the pressurised liquid 6.

Abstract

This invention relates to an improved can fastener which comprises the can filling port (1), a cylindrical cap (3) provided upperly with a sealing surface and with an annular projection, an O-ring (4) and a ring nut (2). The cap (3) is inserted into the can filling port (1) and the ring nut (2) is then screwed over the filling port (1) after positioning the O-ring (4) at the end of the port.

Description

  • This invention relates to an improved liquid-tight fastener for cans, which comprises the can filling port, a cap provided upperly with a sealing surface and an annular projection, and finally a ring nut.
  • A liquid-tight seal must be able to be attained even with cans produced by economical moulding means, i.e. starting from a plastics tube which is hot-deformed with compressed air in a suitable mould, until it takes the form of the mould. The resultant filling ports have fairly thin walls, an irregular thread and a high tendency to liquid loss through the fastener, when relatively low pressures are exceeded.
  • This drawback becomes worse if it is necessary to make a threaded connection through the cap of a can produced as described, even if the cap is made thicker.
  • I have now found that the aforesaid drawbacks can be completely overcome by using a cap provided upperly with a sealing surface, and with an annular projection; the cap is inserted into the can filling port and a ring nut is then screwed over the filling port after positioning an 0-ring at the end of the port. The 0-ring is preferably of nylon. I have also found that by adopting a circular line of contact between the upper parts of the cap and the ring nut, the seal is improved even if vibration is present.
  • I have also found that a perfect seal is obtained if, in particular, the lower part of the cap instead of being cylindrical is slightly conical with a vertex angle of less than 100 in the direction of the can interior.
  • The ring nut and cap can be of suitable thermoplastic material, for example nylon, or can be of metal.
  • The invention is further illustrated by way of non-limiting example in the accompanying figure in which the reference numeral 1 indicates the can filling port, 2 the ring nut, 3 the cap, 4 the 0-ring, 5 and 6 the threaded connectors, which are however extraneous to the invention.
  • The filling port has been designed for the simultaneous patent application in the name of the present applicant entitled: "Containers for distributors of liquids for spraying on to hay and other agricultural products", and for this reason ¼" male threaded connectors are shown for the compressed air 5 and for the pressurised liquid 6.

Claims (5)

1. An improved liquid-tight can fastener, comprising: a can filling port; a cap inserted into the port and provided upperly with a sealing surface and with an annular projection; an 0-ring disposed on the end of the port; and a ring nut screwed on to the port.
2. A fastener as claimed in claim 1, wherein a circular contact is used between the cap and ring nut.
3. A fastener as claimed in claim 1 or 2, wherein the lower part of the cap is slightly conical, with the angle at the vertex in the direction of the can interior being less than 10°,
4. A fastener as claimed in one of the preceding claims, wherein one or more liquid-tight threaded connectors are connected to the cap.
5. A fastener as described and illustrated on the drawing.
EP82830162A 1981-06-19 1982-06-08 Improved liquid-tight fastener, especially for cans Expired EP0069085B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82830162T ATE22047T1 (en) 1981-06-19 1982-06-08 LIQUID-TIGHT CAP FOR CONTAINERS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT22459/81A IT1136694B (en) 1981-06-19 1981-06-19 PERFECTED CLOSURE WITH LIQUID SEAL SPECIES FOR TANKS
IT2245981 1981-06-19

Publications (2)

Publication Number Publication Date
EP0069085A1 true EP0069085A1 (en) 1983-01-05
EP0069085B1 EP0069085B1 (en) 1986-09-10

Family

ID=11196580

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82830162A Expired EP0069085B1 (en) 1981-06-19 1982-06-08 Improved liquid-tight fastener, especially for cans

Country Status (4)

Country Link
EP (1) EP0069085B1 (en)
AT (1) ATE22047T1 (en)
DE (1) DE3273150D1 (en)
IT (1) IT1136694B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2056246A1 (en) * 1970-11-16 1972-05-31 Schiemann, Wolfram, Dr.-Ing., 7140 Ludwig sburg Screw cap for threaded connector of canisters
DE2113106A1 (en) * 1971-03-18 1972-09-21 R V Huenersdorff Nachf Friedri Device for closing canister spout nozzles
US3944103A (en) * 1973-05-02 1976-03-16 Modesto Cros Two-piece plastic closure
US4116352A (en) * 1976-11-01 1978-09-26 Leonard Russo Sealing device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2056246A1 (en) * 1970-11-16 1972-05-31 Schiemann, Wolfram, Dr.-Ing., 7140 Ludwig sburg Screw cap for threaded connector of canisters
DE2113106A1 (en) * 1971-03-18 1972-09-21 R V Huenersdorff Nachf Friedri Device for closing canister spout nozzles
US3944103A (en) * 1973-05-02 1976-03-16 Modesto Cros Two-piece plastic closure
US4116352A (en) * 1976-11-01 1978-09-26 Leonard Russo Sealing device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LUEGER "Lexikon der Technik", Maschinenbau Grundlagen, 1971 ROWOHLT TASCHENBUCHVERLAG, Hamburg *

Also Published As

Publication number Publication date
ATE22047T1 (en) 1986-09-15
IT8122459A0 (en) 1981-06-19
EP0069085B1 (en) 1986-09-10
DE3273150D1 (en) 1986-10-16
IT1136694B (en) 1986-09-03

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