US4628187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planar resistance heating element
Assignee: Tokyo Cosmos Electric Co Ltd
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Filing: 1985-02-08
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Granted: 1986-12-09
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Expires: 2005-02-08
Abstract
Abstract A planar resistance heating element with positive temperature coefficient characteristics includes a resistive body layer formed of a crystalline resin containing electrically conductive particles and disposed between at least a pair of electrodes on an insulating substrate. A phenolic resin layer or a denatured phenolic resin layer with an elastomer resin added is disposed on the resistive body layer in covering relation to the entire surface thereof. An insulating protective film of resin may be disposed on the covering layer with an adhesive layer interposed therebetween, and an adhesive layer may be disposed on an outer surface of the insulating protective film for attachment to an object to be heated.
Inventors
- 👤 Tsugio Sekiguchi
- 👤 Noboru Sato
- 👤 Hiroki Igarashi
- 👤 Akiyoshi Ozawa
- 👤 Iemi Nakazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:00
CPC Classifications
B; B60; B60R; B60R1/00; B60R1/02; B60R1/06; B60R1/0602; H; H01; H01C; H01C7/00; H01C7/02; H01C7/027; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/146; H05B3/20; H05B3/22; H05B3/26; H05B3/267; H05B2203/00; H05B2203/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
115 words
A planar resistance heating element comprising: (a) an insulating substrate; (b) at least two electrodes disposed on a surface of said insulating substrate in spaced substantially parallel relation to each other; (c) a resistive body layer disposed between said electrodes and having a positive temperature coefficient, said resistive body layer being composed of a crystalline resin with electrically conductive particles dispersed therein; (d) a phenolic resin layer covering an entire surface of said resistive body layer; (e) an adhesive layer disposed on said phenolic resin layer and extending to a peripheral edge of said insulating substrate; and (f) an insulating protective film disposed on said adhesive layer in covering relation to an entire surface thereof.
Claim 2
Dependent Claim
115 words
A planar resistance heating element comprising: (a) an insulating substrate; (b) at least two electrodes disposed on a surface of said insulating substrate in spaced substantially parallel relation to each other; (c) a resistive body layer disposed between said electrodes and having a positive temperature coefficient, said resistive body layer being composed of a crystalline resin with electrically conductive particles dispersed therein; (d) a phenolic resin layer covering an entire surface of said resistive body layer; (e) an adhesive layer disposed on said phenolic resin layer and extending to a peripheral edge of said insulating substrate; and (f) an insulating protective film disposed on said adhesive layer in covering relation to an entire surface thereof.
Claim 3
Dependent Claim
17 words
A planar resistance heating element according to claim 1, wherein said insulating substrate comprises a polyester sheet.
Claim 4
Dependent Claim
25 words
A planar resistance heating element according to claim 1, wherein said phenolic resin layer is formed of a denatured phenolic resin containing an elastomer resin.
Claim 5
Dependent Claim
29 words
A planar resistance heating element according to claim 1, further including relation to a second adhesive layer disposed on said insulating protective film in covering an entire surface thereof.
Claim 6
Dependent Claim
25 words
A planar resistance heating element according to claim 4, including a release paper sheet bonded to said second adhesive layer over an entire surface thereof.
Claim 7
Dependent Claim
20 words
A planar resistance heating element according to claim 4, wherein each of said adhesive layers comprises a two-sided adhesive tape.
Claim 8
Dependent Claim
24 words
A planar resistance heating element according to claim 4, wherein each of said insulating substrate and said insulating protective film is formed of polyester.
Claim 9
Dependent Claim
28 words
A planar resistance heating element according to claim 4, wherein said phenolic resin layer includes a filler in the form of fine particles of an inorganic insulating material.
Claim 10
Dependent Claim
25 words
A planar resistance heating element according to one of claims 1 through 7, wherein said crystalline resin comprises a copolymer of polyethylene and vinyl acetate.
Claim 11
Dependent Claim
73 words
A planar resistance heating element according to claim 1 or 4, wherein said insulating substrate is formed of flexible resin and said planar resistance heating element is bonded at the side of said phenolic resin layer thereof to a back of a mirror of the same outer profile as that of said heating element to cover substantially entire area of the back of said mirror, to thereby constitute a defroster and mirror combination.
Claim 12
Dependent Claim
40 words
A planar resistance heating element according to claim 10, including an insulating protective film with adhesive layers on opposite surfaces thereof, said mirror and said planar resistance heating element being bonded to each other by said last-mentioned insulating protective layer.
Claim 13
Dependent Claim
28 words
A planar resistance heating element according to claim 10, wherein said electrodes comprise electrodes in the form of interdigitating comb teeth disposed substantially fully over said insulating substrate.
Claim 14
Dependent Claim
78 words
A planar resistance heating element according to one of claims 1 to 7, wherein each of said two electrodes comprises an electrode terminal portion, and a terminal lug mounted on the outer surface of said insulating substrate in opposing relation to said electrode terminal portion via said insulating substrate, said electrode terminal portion being electrically connected to said terminal lug by metal connecting means extending through a hole formed in said insulating substrate at said electrode terminal portion.
Claim 15
Dependent Claim
46 words
A planar resistance heating element according to claim 13, wherein the connecting portion of said terminal lug is embedded in a silicone resin mound formed inside a frame attached to the outer surface of said insulating substrate to surround the connecting portion of said terminal lug.
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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) | 1989-12-08 | 1990-06-09 | 1990-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-08 | 1994-06-09 | 1994-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-08 | 1998-06-09 | 1998-12-09 | $7700.00 | Window Closed / Lapsed |