US3883293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure roll construction
Assignee: Xerox Corp
•
Filing: 1974-04-05
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Granted: 1975-05-13
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Expires: 1994-04-05
Abstract
Abstract An improved pressure roll construction for a pressure heated fusing apparatus in where the pressure roll is formed with reinforcing elements at the ends thereof.
Inventors
- 👤 Alan F Mccarroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:26
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/206
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
In a heated pressure roll fusing system for fusing toner images of electrostatic copying machines in which a heated fuser roll is urged into pressure contact with a relatively soft pressure backing roll, an improved pressure roll device comprising, a core member, a cylindrical member made of rubber positioned around said core member, said rubber being relatively thick and soft and having a tendency to bulge at the ends thereof under fusing conditions, said cylindrical member being formed with at least one thin stiffening member inserted at each of the ends thereof said stiffening members being circular in shape and having a thickness ranging from about .001 inches to about .010 inches to minimize end bulge to improve fusing and reduce wear.
Claim 2
Dependent Claim
122 words
In a heated pressure roll fusing system for fusing toner images of electrostatic copying machines in which a heated fuser roll is urged into pressure contact with a relatively soft pressure backing roll, an improved pressure roll device comprising, a core member, a cylindrical member made of rubber positioned around said core member, said rubber being relatively thick and soft and having a tendency to bulge at the ends thereof under fusing conditions, said cylindrical member being formed with at least one thin stiffening member inserted at each of the ends thereof said stiffening members being circular in shape and having a thickness ranging from about .001 inches to about .010 inches to minimize end bulge to improve fusing and reduce wear.
Claim 3
Dependent Claim
23 words
A pressure roll device according to claim 1 wherein said stiffening members are made of stainless steel, aluminum, plastic, fiberglass or combinations thereof.
Claim 4
Dependent Claim
21 words
A pressure roll device according to claim 1 wherein said cylindrical member has an exterior layer which is impervious to oil.
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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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |