Patent US3859159A successfully refreshed from Google Patents.
US3859159A
Expired / Lapsed
US
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Apparatus for forming a rupturable seal
Assignee: EIDP Inc
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Filing: 1974-03-04
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Granted: 1975-01-07
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Expires: 1994-03-04
Abstract
Abstract Disclosed herein is a method and apparatus for forming uniform and reliable rupturable seals between two thermoplastic surfaces by the use of compression and impulse heating.
Inventors
- 👤 Elbert P Carter
- 👤 Gerrit Neiuweboer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:50
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/40; B29C66/41; B29C66/45; B29C65/00; B29C65/02; B29C65/18; B29C65/22; B29C65/221; B29C65/224; B29C65/76; B29C66/004; B29C66/0042; B29C66/0044; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/812; B29C66/8122; B29C66/8126; B29C66/81261; B29C66/814; B29C66/8141; B29C66/81427; B29C66/818; B29C66/8187; B29C66/81871; B29C65/38; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1737
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
AN APPARATUS FOR FORMING RUPTURABLE SEALS BETWEEN TWO THERMOPLASTIC SURFACES COMPRISING A RESILIENT BACKING PLATE, A HEATING PLATEN AND A MEANS FOR COMPRESSING SAID THERMOPLASTIC SURFACES BETWEEN SAID BACKING PLATE AND HEATING PLATEN; SAID HEATING PLATEN COMPRISING: A. A METAL PLATE, B. MEANS TO MAINTAIN SAID METAL PLATE AT A CONSTANT TEMPERATURE, C. THERMALLY CONDUCTIVE ELECTRICAL INSULATING FILM BONDED TO SAID METAL PLATE,
Claim 2
Independent Claim
63 words
AN APPARATUS FOR FORMING RUPTURABLE SEALS BETWEEN TWO THERMOPLASTIC SURFACES COMPRISING A RESILIENT BACKING PLATE, A HEATING PLATEN AND A MEANS FOR COMPRESSING SAID THERMOPLASTIC SURFACES BETWEEN SAID BACKING PLATE AND HEATING PLATEN; SAID HEATING PLATEN COMPRISING: A. A METAL PLATE, B. MEANS TO MAINTAIN SAID METAL PLATE AT A CONSTANT TEMPERATURE, C. THERMALLY CONDUCTIVE ELECTRICAL INSULATING FILM BONDED TO SAID METAL PLATE,
Claim 3
Dependent Claim
16 words
The apparatus of claim 1 wherein said thermally conductive electrical insulating film is a polyimide film.
Claim 4
Dependent Claim
13 words
The apparatus of claim 1 wherein both thermally conductive films are polyimide films.
Claim 5
Dependent Claim
31 words
The apparatus of claim 3 wherein said electrically conductive heating surface is an invar heating surface bonded to said thermally conductive electrical insulating film by means of a tetrafluoroethylene-hexafluoropropylene copolymer film.
Claim 6
Dependent Claim
19 words
The apparatus of claim 3 wherein said electrically conductive heating surface has a thickness of at least 5.0 mils.
Claim 7
Dependent Claim
29 words
The apparatus of claim 3 wherein said thermally conductive non-stick film comprises a polyimide film coated on the side away from said heating surface with a tetrafluoroethylene-hexafluoropropylene copolymer film.
Claim 8
Dependent Claim
15 words
The apparatus of claim 3 wherein said heating surface comprises at least one chevron-shaped region.
Claim 9
Dependent Claim
15 words
The apparatus of claim 1 wherein said thermoplastic surfaces are made from an ionomeric resin.
References Cited (Backward Citations)
US2714416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |