US3921573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning system for electrostatic reproducing apparatus
Assignee: Xerox Corp
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Filing: 1973-05-29
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Granted: 1975-11-25
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Expires: 1993-05-29
Abstract
Abstract A roll fusing device for a xerographic reproducing apparatus characterized by the provision of a heated roll for cleaning toner material from a back-up or pressure roll. The cleaning roll has a higher surface energy than the back-up roll, consequently, when sufficient heat is supplied to toner particles on the backup roll to cause the toner particles to become tacky the back-up roll releases the toner to the cleaning roll which, due to its higher relative surface energy or adherence factor, has a greater affinity for the toner than does the back-up roll.
Inventors
- 👤 Raghulinga R Thettu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:58
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
A thermal fuser for use in fixing toner particles to a substrate carrying such particles, said fuser comprising: a heated fuser roll; a backup roll member adapted to be moved in contact with said heated member and forming a nip therebetween through which said substrate is passed such that the toner particles carried by said substrate contact said heated member; and internally heated cleaning means supported in contact with said backup roll member for tackifying toner offset thereto, said cleaning member having a surface exhibiting a greater affinity for said tackified toner than said backup roll member.
Claim 2
Dependent Claim
97 words
A thermal fuser for use in fixing toner particles to a substrate carrying such particles, said fuser comprising: a heated fuser roll; a backup roll member adapted to be moved in contact with said heated member and forming a nip therebetween through which said substrate is passed such that the toner particles carried by said substrate contact said heated member; and internally heated cleaning means supported in contact with said backup roll member for tackifying toner offset thereto, said cleaning member having a surface exhibiting a greater affinity for said tackified toner than said backup roll member.
Claim 3
Dependent Claim
34 words
Structure according to claim 1, wherein said cleaning member comprises a rigid thermally conductive support member having a heating element disposed internally thereof and further comprises an outer tubular member contacted by said support.
Claim 4
Dependent Claim
16 words
Structure according to claim 2 wherein said rigid support and said tubular member are eccentrically mounted.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |