Patent US4529471A successfully refreshed from Google Patents.
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 11:30
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.
References Cited (Backward Citations)
US3005402A
Cited
US2107249A
Cited
US2566799A
Cited
US2658552A
Cited
US2711781A
Cited
US2897875A
Cited
US2726707A
Cited
US3367261A
Cited
US3729359A
Cited
US3739129A
Cited
US4084999A
Cited
US4213031A
Cited
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 |