US3878818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning apparatus for dry fuser rolls
Assignee: Xerox Corp
•
Filing: 1973-08-10
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Granted: 1975-04-22
•
Expires: 1993-08-10
Abstract
Abstract Cleaning apparatus for a dry heated pressure fusing system in which a conformable roll having a sleeve made of a material selected from the group of fluoro carbon resins, silicone, or fluorosilicones contacts the dry fuser roll to receive both paper contamination and non-visual toner offset to maintain clean copy sheets fixed by the fusing system. Some paper contamination and toner is electrostatically attracted to the cleaning roll by electrostatic attraction as well as surface forces. A cleaning pad is retractably positioned to scrub the dry fuser roll surface to loosen fine sizing particles in the paper and tiny toner particles so that they can be removed onto the sleeve. The contamination and toner offset are removed from the sleeve by a wiping member which may be non-tacky or tacky.
Inventors
- 👤 Raghulinga R Thettu
- 👤 Donald J Quant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:26
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
131 words
An improved cleaning apparatus for dry heated pressure roll fusing systems in which paper contaminants and toner particles on the dry fusing roll surface are removed, the improvement comprising: a cleaning roll member including a soft elastomeric blanket having an outer sleeve positioned in contact with a fusing roll surface to attract paper contaminants and toner particles, and wiping means positioned to contact said fusing roll surface to scrub and loosen tiny paper contaminants and toner particles ranging in size from submicron to about 10 microns sticking on the dry fuser roll surface whereby said contaminants and toner particles can be removed onto said sleeve, said wiping means includes a pad member made of a heat resistant material urged into pressure contact with said fusing roll surface at a constant pressure.
Claim 2
Dependent Claim
131 words
An improved cleaning apparatus for dry heated pressure roll fusing systems in which paper contaminants and toner particles on the dry fusing roll surface are removed, the improvement comprising: a cleaning roll member including a soft elastomeric blanket having an outer sleeve positioned in contact with a fusing roll surface to attract paper contaminants and toner particles, and wiping means positioned to contact said fusing roll surface to scrub and loosen tiny paper contaminants and toner particles ranging in size from submicron to about 10 microns sticking on the dry fuser roll surface whereby said contaminants and toner particles can be removed onto said sleeve, said wiping means includes a pad member made of a heat resistant material urged into pressure contact with said fusing roll surface at a constant pressure.
Claim 3
Dependent Claim
131 words
An improved cleaning apparatus for dry heated pressure roll fusing systems in which paper contaminants and toner particles on the dry fusing roll surface are removed, the improvement comprising: a cleaning roll member including a soft elastomeric blanket having an outer sleeve positioned in contact with a fusing roll surface to attract paper contaminants and toner particles, and wiping means positioned to contact said fusing roll surface to scrub and loosen tiny paper contaminants and toner particles ranging in size from submicron to about 10 microns sticking on the dry fuser roll surface whereby said contaminants and toner particles can be removed onto said sleeve, said wiping means includes a pad member made of a heat resistant material urged into pressure contact with said fusing roll surface at a constant pressure.
Claim 4
Dependent Claim
131 words
An improved cleaning apparatus for dry heated pressure roll fusing systems in which paper contaminants and toner particles on the dry fusing roll surface are removed, the improvement comprising: a cleaning roll member including a soft elastomeric blanket having an outer sleeve positioned in contact with a fusing roll surface to attract paper contaminants and toner particles, and wiping means positioned to contact said fusing roll surface to scrub and loosen tiny paper contaminants and toner particles ranging in size from submicron to about 10 microns sticking on the dry fuser roll surface whereby said contaminants and toner particles can be removed onto said sleeve, said wiping means includes a pad member made of a heat resistant material urged into pressure contact with said fusing roll surface at a constant pressure.
Claim 5
Dependent Claim
20 words
Apparatus according to claim 1 wherein said pad member is urged against the fusing roll surface by a spring member.
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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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |