US3934547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Renewable chow fuser coating
Assignee: Xerox Corp
•
Filing: 1974-07-12
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Granted: 1976-01-27
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Expires: 1994-07-12
Abstract
Abstract A contact fuser assembly for use in an electrostatic reproducing apparatus including an internally heated fuser roll structure comprising a rigid, thermally conductive core which is coated during operation of the assembly with a thin layer of a normally solid thermally stable material with subsequent application of a liquid release agent to the coated core. In the preferred embodiment of the invention the coating material comprises a fluorocarbon telomer such as Vydax 1000 and the liquid release agent comprises a liquid silicone oil.
Inventors
- 👤 Raymond L. Jelfo
- 👤 Stephen Strella
- 👤 Willard C. Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:52
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
Apparatus for fusing toner images to support sheets, said apparatus comprising: a heated fuser structure including a thermally conductive core; means for applying a solid low surface energy coating to said core by contacting said core with a bar of low surface energy material, said coating preventing toner from contacting said core; means for applying a low viscosity release agent to said low surface energy coating for facilitating release of said support sheets from said heated core; and a deformable backup member forming a nip with said core member through which said support sheets move with said toner images contacting the low viscosity release agent.
Claim 2
Dependent Claim
105 words
Apparatus for fusing toner images to support sheets, said apparatus comprising: a heated fuser structure including a thermally conductive core; means for applying a solid low surface energy coating to said core by contacting said core with a bar of low surface energy material, said coating preventing toner from contacting said core; means for applying a low viscosity release agent to said low surface energy coating for facilitating release of said support sheets from said heated core; and a deformable backup member forming a nip with said core member through which said support sheets move with said toner images contacting the low viscosity release agent.
Claim 3
Dependent Claim
15 words
Apparatus according to claim 1, wherein said low surface energy coating comprises a fluorocarbon telomer.
Claim 4
Dependent Claim
16 words
Apparatus according to claim 2, wherein said coating is on the order of 10-10,000 A thick.
Claim 5
Dependent Claim
14 words
Apparatus according to claim 3, wherein said low viscosity release agent comprises silicone oil.
Claim 6
Dependent Claim
12 words
Apparatus according to claim 4, wherein said silicone oil is applied continuously.
Claim 7
Dependent Claim
17 words
Apparatus according to claim 5, wherein said means for applying low surface energy material is effected continuously.
References Cited (Backward Citations)
US2944484A
Cited
US3268351A
Cited
US3539161A
Cited
US3716221A
Cited
US3731358A
Cited
US3810776A
Cited
US3846151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |