EP0411259A1 - Seal - Google Patents
Seal Download PDFInfo
- Publication number
- EP0411259A1 EP0411259A1 EP90109436A EP90109436A EP0411259A1 EP 0411259 A1 EP0411259 A1 EP 0411259A1 EP 90109436 A EP90109436 A EP 90109436A EP 90109436 A EP90109436 A EP 90109436A EP 0411259 A1 EP0411259 A1 EP 0411259A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- closure
- dish
- neck
- screw cap
- drum
- 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- Withdrawn
Links
Images
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
- B65D41/28—Caps combined with stoppers
-
- 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
- B65D51/00—Closures not otherwise provided for
- B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
-
- 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
- B65D2251/00—Details relating to container closures
- B65D2251/0003—Two or more closures
- B65D2251/0006—Upper closure
- B65D2251/0015—Upper closure of the 41-type
-
- 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
- B65D2251/00—Details relating to container closures
- B65D2251/0003—Two or more closures
- B65D2251/0068—Lower closure
- B65D2251/0075—Lower closure of the 39-type
Definitions
- This invention relates to an improved seal and in particular relates to an improved seal for use with cans, tanks or drums having screw caps.
- Drums for carrying liquids are commonly provided with screw cap closure means.
- an upstanding neck providing access to the interior of the drum carries a male thread.
- a complementary screw cap having a wad or seal in its inner face completes the closure.
- This closure commonly takes the form of a thin metallic dish or membrane which is an interference fit within the neck.
- the secondary closure requires to be removed by user before they can gain access to the contents of the drum and since this can only be done by destroying the seal it is readily apparent if a drum has been tampered with.
- the secondary closure does not normally provide an effective seal in the sense of being completely liquid-tight, and with most screw cap closures even with secondary closures of this type a small excess pressure within the drum, eg of 1.2 bar (3 psig), is often sufficient for the closure to leak.
- the invention seeks to provide a secondary closure improved in the above respects.
- a secondary closure for use with a screw cap closure which comprises a dish adapted to fit within the neck of a screw cap closure characterised in that the dish has annular groove about its external circumference adapted to receive an O ring.
- the lower surface of the dish is not flat but is curved downwardly toward the interior of the drum.
- a secondary closure is provided which is capable of performing a liquid tight seal and resisting internal pressures an order of magnitude greater than was previously the case without leaking.
- the outlet of a tank, can, or the like designed to carry liquid is a neck 10 carrying an external screw thread 12.
- the neck 10 co-operates with a cap 14 having a complementary thread 16.
- the cap 14 is provided with a wad 18 of sealing material.
- This seal is not especially resistant to internal pressure and indeed may well start to leak at internal pressures as low as 0.2 bar above atmospheric (3 psig).
- the cap closure described above is conventional and would normally be used with a dished cylindrical anti-pilferage secondary closure. In accordance with the invention this is replaced by the secondary closure 22.
- the latter has a radiused lower face 24 and is provided with an annular groove 26 on its external circumference. The groove 26 receives an O-ring 28.
- the secondary closure 22 is placed within the neck 10 when the O-ring 28 provides an effective liquid-tight seal.
- the external dimensions of the dish 22 can be such that the closure is an interference fit within the neck 10 and can only be removed by destroying it, eg by inserting a screwdriver and levering it out. In this way the secondary closure 22 provides a pilferage barrier.
- the design of the secondary closure is such that it will resist very much higher pressures than hitherto without leakage, typically 2.5-3 bar (20-30 psig). This latter ability is especially important for containers carrying dangerous substances where stringent regulations are in force concerning the pressure resistance of the closure means.
- the secondary closure of the invention provides a simple and economical solution to the problem of container closures being liquid tight and able to resist internal pressures.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Abstract
ABSTRACT
A secondary closure (22) for use with a screw cap closure which comprises a dish adapted to fit within the neck of a screw cap closure (14) characterised in that the dish has annular groove (26) about its external circumference adapted to receive an O-ring (28). The lower surface (24) of the dish is curved downwardly or radiused toward the interior of the drum. The external dimensions of the dish are such that the closure is an interference fit within the neck (10) and can only be removed by destroying the closure. The closure will resist internal pressures in the region of 1.5 - 2 bar (above ambient).
Description
- This invention relates to an improved seal and in particular relates to an improved seal for use with cans, tanks or drums having screw caps.
- Drums for carrying liquids are commonly provided with screw cap closure means. At a convenient place on the drum, usually the top face, an upstanding neck providing access to the interior of the drum carries a male thread. A complementary screw cap having a wad or seal in its inner face completes the closure. It is common practice to provide an additional closure for use on drums which are filled with a liquid at manufacture to prevent or at least reduce the likelihood of pilferage of the liquid. This closure commonly takes the form of a thin metallic dish or membrane which is an interference fit within the neck. The secondary closure requires to be removed by user before they can gain access to the contents of the drum and since this can only be done by destroying the seal it is readily apparent if a drum has been tampered with. However, the secondary closure does not normally provide an effective seal in the sense of being completely liquid-tight, and with most screw cap closures even with secondary closures of this type a small excess pressure within the drum, eg of 1.2 bar (3 psig), is often sufficient for the closure to leak.
- The invention seeks to provide a secondary closure improved in the above respects.
- According to the present invention there is provided a secondary closure for use with a screw cap closure which comprises a dish adapted to fit within the neck of a screw cap closure characterised in that the dish has annular groove about its external circumference adapted to receive an O ring.
- Preferably also the lower surface of the dish is not flat but is curved downwardly toward the interior of the drum. By these means a secondary closure is provided which is capable of performing a liquid tight seal and resisting internal pressures an order of magnitude greater than was previously the case without leaking.
- The invention will be described further, by way of example, with reference to the accompanying drawings, in which:
- figure 1 is a sectional view of a secondary closure in accordance with the invention;
- figure 2 is a similar view to figure 1 of the closure in place beneath the screw cap.
- Referring to the drawings, the outlet of a tank, can, or the like designed to carry liquid is a
neck 10 carrying anexternal screw thread 12. Theneck 10 co-operates with acap 14 having acomplementary thread 16. Thecap 14 is provided with awad 18 of sealing material. In a conventional closure it is the contact of the sealingmaterial 18 with a raisedlip 20 at the top of theneck 10 which provides the liquid proof seal. This seal is not especially resistant to internal pressure and indeed may well start to leak at internal pressures as low as 0.2 bar above atmospheric (3 psig). - The cap closure described above is conventional and would normally be used with a dished cylindrical anti-pilferage secondary closure. In accordance with the invention this is replaced by the
secondary closure 22. The latter has a radiusedlower face 24 and is provided with anannular groove 26 on its external circumference. Thegroove 26 receives an O-ring 28. - In use, the
secondary closure 22 is placed within theneck 10 when the O-ring 28 provides an effective liquid-tight seal. The external dimensions of thedish 22 can be such that the closure is an interference fit within theneck 10 and can only be removed by destroying it, eg by inserting a screwdriver and levering it out. In this way thesecondary closure 22 provides a pilferage barrier. However, the design of the secondary closure is such that it will resist very much higher pressures than hitherto without leakage, typically 2.5-3 bar (20-30 psig). This latter ability is especially important for containers carrying dangerous substances where stringent regulations are in force concerning the pressure resistance of the closure means. - The secondary closure of the invention provides a simple and economical solution to the problem of container closures being liquid tight and able to resist internal pressures.
Claims (5)
1. A secondary closure for use with a screw cap closure which comprises a dish adapted to fit within the neck of a screw cap closure characterised in that the dish has annular groove about its external circumference adapted to receive an O-ring.
2. A closure as claimed in claim 1 in which the lower surface of the dish is curved downwardly toward the interior of the drum.
3. A closure as claimed in claim 2 in which the lower surface of the dish is radiused.
4. A closure as claimed in any of claims 1 to 3 in which the external dimensions of the dish are such that the closure is an interference fit within the neck and can only be removed by destroying the closure.
5. A closure as claimed in any of claims 1 to 4 which will resist internal pressures in the region of 1.5 - 2 bar (above ambient).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB898917666A GB8917666D0 (en) | 1989-08-02 | 1989-08-02 | Improved seal |
GB8917666 | 1989-08-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0411259A1 true EP0411259A1 (en) | 1991-02-06 |
Family
ID=10661051
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90109436A Withdrawn EP0411259A1 (en) | 1989-08-02 | 1990-05-18 | Seal |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0411259A1 (en) |
GB (1) | GB8917666D0 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1476564A (en) * | 1922-04-13 | 1923-12-04 | Samuel H Yancey | Seal for metal cans and like containers |
US1750545A (en) * | 1927-07-08 | 1930-03-11 | Stabernack Georg | Packing container |
US1758916A (en) * | 1929-03-25 | 1930-05-20 | Continental Can Co | Dual nozzle closure for containers |
US1855813A (en) * | 1929-11-19 | 1932-04-26 | Zampari Franco | Sealing apparatus |
FR1381587A (en) * | 1963-10-31 | 1964-12-14 | Gerble Ets | Improvements to closure devices for packaging |
-
1989
- 1989-08-02 GB GB898917666A patent/GB8917666D0/en active Pending
-
1990
- 1990-05-18 EP EP90109436A patent/EP0411259A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1476564A (en) * | 1922-04-13 | 1923-12-04 | Samuel H Yancey | Seal for metal cans and like containers |
US1750545A (en) * | 1927-07-08 | 1930-03-11 | Stabernack Georg | Packing container |
US1758916A (en) * | 1929-03-25 | 1930-05-20 | Continental Can Co | Dual nozzle closure for containers |
US1855813A (en) * | 1929-11-19 | 1932-04-26 | Zampari Franco | Sealing apparatus |
FR1381587A (en) * | 1963-10-31 | 1964-12-14 | Gerble Ets | Improvements to closure devices for packaging |
Also Published As
Publication number | Publication date |
---|---|
GB8917666D0 (en) | 1989-09-20 |
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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 |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19910715 |
|
17Q | First examination report despatched |
Effective date: 19931015 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: T & D INDUSTRIES PLC |
|
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: 19950503 |