US4257535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container for liquid having a heat sealable collar for filling the container and receiving a dispensing mechanism
Assignee: Wrightcel Ltd
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Filing: 1979-05-23
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Granted: 1981-03-24
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Expires: 1999-05-23
Abstract
Abstract A system for a flexible container for liquids in which a socket is fixed to one wall and the container is filled through this socket. A flap being heat sealable on one surface is attached to one wall of the container and this flap underlies the socket so that after filling the socket can be closed by the flap and the filled container is sealed for transportation. Subsequently the socket can be fitted with a tap which breaks the flap seal and enables the contents of the flexible container to be dispensed.
Inventors
- 👤 Lee T. Mellett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:09
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/52; B65D75/58; B65D75/5861; B65D75/5872; B65D75/5877; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C66/00; B29C66/004; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/13; B29C66/131; B29C66/50; B29C66/51; B29C66/53; B29C66/532; B29C66/5324; B29C66/53245; B29C66/53246; B29C66/53247; B29C66/61; B29C66/70; B29C66/72; B29C66/723; B29C66/7234; B29C66/72341; B65D31/00; B65D31/02; B65D77/00; B65D77/04; B65D77/06; B65D77/062; B65D77/065; B65D77/067; B29C66/12; B29C66/122; B29C66/1222; B29C66/1224; B29C66/1312; B29C66/20; B29C66/23; B29C66/232; B29C66/71; Y; Y10; Y10S; Y10S128/00; Y10S128/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
153 words
A flexible container, comprising: (a) a wall having a heat sealable opening: (b) a collar surrounding said heat sealable opening for filling said container before said opening is heat sealed and for receiving a dispensing means after said container is filled and said opening is heat sealed, and (c) a flap internally disposed within said container over said opening for providing a fluid seal over said opening after said container is filled through said collar, said flap including: (i) a first heat-sealable furface facing said opening for providing a fluid seal over said opening when heat is applied outside the container in the region of said flap; and, (ii) a second non-heat-sealable surface facing away from said opening for preventing said flap from being heat sealed to the interior of said container when heat is applied outside the container in the region of said flap to heat seal said flap over said opening.
Claim 2
Dependent Claim
153 words
A flexible container, comprising: (a) a wall having a heat sealable opening: (b) a collar surrounding said heat sealable opening for filling said container before said opening is heat sealed and for receiving a dispensing means after said container is filled and said opening is heat sealed, and (c) a flap internally disposed within said container over said opening for providing a fluid seal over said opening after said container is filled through said collar, said flap including: (i) a first heat-sealable furface facing said opening for providing a fluid seal over said opening when heat is applied outside the container in the region of said flap; and, (ii) a second non-heat-sealable surface facing away from said opening for preventing said flap from being heat sealed to the interior of said container when heat is applied outside the container in the region of said flap to heat seal said flap over said opening.
Claim 3
Dependent Claim
31 words
The flexible container of claim 1 wherein said collar includes a flange which is sealingly engaged to said wall around said heat sealable opening prior to the filling of said container.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |