US4516104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil assembly for hot melt induction heater apparatus
Assignee: Boeing Co
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Filing: 1982-10-29
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Granted: 1985-05-07
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Expires: 2002-10-29
Abstract
Abstract An induction heating coil having fluoroplastic coated polyimide tape wrapped windings for providing a bonded, solid monolithic structure. The induction heating coil includes a cooling fin of predetermined length extending in interleaved relationship between a plurality of consecutive turns of current-carrying coil windings. A plurality of fluoroplastic coated polyimide sheets are fused to the coil body between the coil body and a fluoroplastic face sheet forming the outer wear surface of the induction heater coil, thereby providing a non-stick surface for release of hot melt adhesives.
Inventors
- 👤 Arthur W. McDermott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:38
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/12; H05; H05B; H05B6/00; H05B6/02; H05B6/36
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
100 words
A coil assembly for use in induction heating apparatus comprising a plurality of windings of a flat shaped electrical conductor, said electrical conductor wrapped with a polyimide tape, said polyimide tape having two major side surfaces, each of said side surfaces having a coating of fluoroplastic material, and, including a fluoroplastic face sheet (21) supported by a major surface of said coil assembly and providing a non-stick surface for release of hot melt adhesive material and further including a fluoroplastic coated polyimide sheet (20) fused to and disposed between said face sheet (21) and said major surface of said coil.
Claim 2
Dependent Claim
100 words
A coil assembly for use in induction heating apparatus comprising a plurality of windings of a flat shaped electrical conductor, said electrical conductor wrapped with a polyimide tape, said polyimide tape having two major side surfaces, each of said side surfaces having a coating of fluoroplastic material, and, including a fluoroplastic face sheet (21) supported by a major surface of said coil assembly and providing a non-stick surface for release of hot melt adhesive material and further including a fluoroplastic coated polyimide sheet (20) fused to and disposed between said face sheet (21) and said major surface of said coil.
Claim 3
Dependent Claim
20 words
The invention according to claim 1 wherein said fluoroplastic face sheet has a thickness of 32 mils±2 to 3 mils.
References Cited (Backward Citations)
US4146858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |