US4170957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixing device using polyarylsiloxanes as release agents
Assignee: Xerox Corp
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Filing: 1977-08-29
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Granted: 1979-10-16
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Expires: 1997-08-29
Abstract
Abstract Polyarylsiloxanes are used on metal fusing devices in photocopiers to fix particulate thermoplastic toner to a substrate while the toner is in a fused state. The polyarylsiloxanes can be continuously applied in minimal thicknesses on the fusing device to form a thermally stable, renewable, self-cleaning layer having excellent toner release properties. A preferred polyarylsiloxane is polyphenylmethyl dimethyl siloxane.
Inventors
- 👤 Clifford O. Eddy
- 👤 Thomas R. Hoffend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:25
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
174 words
Apparatus for contact fusing toner particles to a substrate, said apparatus comprising: a heated structure comprising a rigid metal core and a coating of a polyarylsiloxane release material being the type which is capable of interacting with the metal core surface, said coating comprising a first barrier coating portion in contact with said metal core surface, said first portion being formed during operation of the apparatus at the interface of the metal core surface and the polyarylsiloxane release material, the first portion having a greater affinity for the metal core surface than the toner particles and thereby preventing toner particles from contacting the metal core, and a second replenishing release portion continuously applied, the release portion being the polyarylsiloxane release material and having a cohesive force which is less than the adhesive forces between the toner particles and the substrate and the cohesive forces of the toner particles; and a backup member cooperating with said heated structure to form a nip through which said substrate passes with said toner particles contacting said heated structure.
Claim 2
Dependent Claim
174 words
Apparatus for contact fusing toner particles to a substrate, said apparatus comprising: a heated structure comprising a rigid metal core and a coating of a polyarylsiloxane release material being the type which is capable of interacting with the metal core surface, said coating comprising a first barrier coating portion in contact with said metal core surface, said first portion being formed during operation of the apparatus at the interface of the metal core surface and the polyarylsiloxane release material, the first portion having a greater affinity for the metal core surface than the toner particles and thereby preventing toner particles from contacting the metal core, and a second replenishing release portion continuously applied, the release portion being the polyarylsiloxane release material and having a cohesive force which is less than the adhesive forces between the toner particles and the substrate and the cohesive forces of the toner particles; and a backup member cooperating with said heated structure to form a nip through which said substrate passes with said toner particles contacting said heated structure.
Claim 3
Dependent Claim
14 words
Apparatus according to claim 1 wherein said barrier coating is a continuously renewable coating.
Claim 4
Dependent Claim
11 words
Apparatus of claim 1 wherein the polyarylsiloxane is polyphenylmethyl dimethylsiloxane fluid.
Claim 5
Dependent Claim
11 words
Apparatus of claim 1 wherein the polyarylsiloxane is polychlorophenylmethyl dimethylsiloxane fluid.
Claim 6
Dependent Claim
10 words
Apparatus of claim 1 wherein the polyarylsiloxane is polyiodonaphthyl dimethylsiloxane.
Claim 7
Dependent Claim
10 words
Apparatus of claim 1 wherein the polyarylsiloxane is polyiodophenyl dimethylsiloxane.
Claim 8
Dependent Claim
10 words
Apparatus of claim 1 wherein the polyarylsiloxane is polybromophenyl dimethylsiloxane.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-15 | 1983-04-16 | 1983-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-15 | 1987-04-16 | 1987-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-15 | 1991-04-16 | 1991-10-16 | $7700.00 | Window Closed / Lapsed |