US4529471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heat sealing
Assignee: Reynolds Metals Co
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Filing: 1984-07-27
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Granted: 1985-07-16
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Expires: 2004-07-27
Abstract
Abstract An apparatus for lap sealing plastics resin films is disclosed. The apparatus includes a heated and driven belt and a back-up plate. The belt may be driven independently of the film, such that its speed need not equal that of the film. The back-up plate includes a finger means for orienting the film into a lapped position and a sealing surface which permits the film to slide without damage and which does not act as a heat sink.
Inventors
- 👤 Donald E. Vaughan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:45
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83421; B29C53/00; B29C53/36; B29C53/38; B29C53/48; B29C65/00; B29C65/02; B29C65/18; B29C65/78; B29C65/7802; B29C65/7835; B29C65/7858; B29C65/7888; B29C65/7894; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29C66/49; B29C66/81; B29C66/818; B29C66/8181; B29C66/82; B29C66/824; B29C66/8242; B29C66/90; B29C66/91; B29C66/914; B29C66/9141; B29C66/91421; B29C66/93; B29C66/934; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1715
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
79 words
A lap sealer for sealing a plastics resin film tube formed at a forming collar and moving at a given speed comprising low friction endless band sealing surface, means for driving said sealing surface at a speed independent of the speed of said film, means for heating said sealing surface, and a back-up plate separate from said forming collar, said back-up plate having finger means for guiding said film and a non-heat sink material surface against which sealing occurs.
Claim 2
Dependent Claim
79 words
A lap sealer for sealing a plastics resin film tube formed at a forming collar and moving at a given speed comprising low friction endless band sealing surface, means for driving said sealing surface at a speed independent of the speed of said film, means for heating said sealing surface, and a back-up plate separate from said forming collar, said back-up plate having finger means for guiding said film and a non-heat sink material surface against which sealing occurs.
Claim 3
Dependent Claim
16 words
The lap sealer of claim 1 wherein said non-heat sink sealing surface is formed from felt.
Claim 4
Dependent Claim
34 words
The lap sealer of claim 1 wherein said driving means comprises rollers around which said endless band sealing surface passes and a speed controlled motor means for driving at least one of said rollers.
Claim 5
Dependent Claim
17 words
The lap sealer of claim 1 wherein said endless band sealing surface comprises a stainless steel band.
Claim 6
Dependent Claim
25 words
The lap sealer of claim 1 wherein said heating means comprises an electrically heated block in heat transfer relation to said endless band sealing surface.
Claim 7
Dependent Claim
18 words
The lap sealer of claim 5 further comprising means for controlling the temperature of said electrically heated block.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |