Patent US4562335A successfully refreshed from Google Patents.
US4562335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal fixing roll for electrographic processing
Assignee: Fujifilm Business Innovation Corp
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Filing: 1984-01-09
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Granted: 1985-12-31
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Expires: 2004-01-09
Abstract
Abstract A thermal fixing roll used in electrographic processing in which a rough metallic cylindrical core (2) contains an internal heater (H) and has a heat-resistant layer (3) covering the outer surface thereof. The heat-resistant layer is silicone rubber mixed with silicon carbide.
Inventors
- 👤 Ryuji Katsuno
- 👤 Toshihiko Tsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:18
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
37 words
An electrographic processing thermal fixing roll, comprising: a cylindrical core (2); and a heat-resistant elastic layer (3) substantially covering an outer cylindrical surface of said core, said layer comprising a mixture of silicone rubber and silicon carbide.
Claim 2
Dependent Claim
37 words
An electrographic processing thermal fixing roll, comprising: a cylindrical core (2); and a heat-resistant elastic layer (3) substantially covering an outer cylindrical surface of said core, said layer comprising a mixture of silicone rubber and silicon carbide.
Claim 3
Dependent Claim
16 words
An electrographic processing thermal fixing roll, as recited in claim 1, wherein said core is rough.
Claim 4
Dependent Claim
21 words
An electrographic processing thermal fixing roll, as recited in claim 2, further comprising a heater (H) disposed within said rough core.
Claim 5
Dependent Claim
33 words
An electrographic processing thermal fixing roll, as recited in claim 1, wherein the mixture comprises 100 parts by weight of silicone rubber and 50 to 500 parts by weight of silicon carbide powder.
Claim 6
Dependent Claim
33 words
An electrographic processing thermal fixing roll, as recited in claim 4, wherein the mixture comprises 100 parts by weight of silicone rubber and 50 to 200 parts by weight of silicon carbide powder.
Claim 7
Dependent Claim
24 words
An electrographic processing thermal fixing roll, as recited in claim 5, wherein the silicone rubber consists essentially of thermal vulcanization type HTV silicone rubber.
Claim 8
Dependent Claim
35 words
An electrographic processing thermal fixing roll as recited in claim 6, wherein the mixture comprises substantially 100 parts by weight of thermal vulcanization type HTV silicone rubber and 120 parts by weight of silicon carbide.
References Cited (Backward Citations)
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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) | 1988-12-30 | 1989-07-01 | 1989-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-30 | 1993-07-01 | 1993-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-30 | 1997-07-01 | 1997-12-31 | $7700.00 | Window Closed / Lapsed |