Patent US3841827A successfully refreshed from Google Patents.
US3841827A
Expired / Lapsed
US
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Toner release oil transfer pad
Assignee: Xerox Corp
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Filing: 1973-06-11
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Granted: 1974-10-15
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Expires: 1993-06-11
Abstract
Abstract An improved oil applicating pad for use in applying oil to the fuser roll surface of a heated pressure fusing system for fusing toner images. The pad has a working surface made of silicone rubber material which resists visual and non-visual toner offset on the surface thereof. The pad construction includes different embodiments which comprise sponge, reinforced fabric, and multiple layers of different material.
Inventors
- 👤 T Thettu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:32
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
112 words
In a heated pressure roll fusing system for fusing toner images to copy sheets of an electrostatic copying machine in which a heated fuser roll is coated with an oil to prevent toner offset, an improved oil application pad comprising an oil transfer pad member positioned in contact with a heated fuser roll to apply oil received by said pad member continuously to the surface of said heated fuser roll during fusing of toner images to copy sheets, said pad member having a working surface contacting said heated fuser roll made of silicone rubber sponge material which has an embossed pattern to resist visual and non-visual offset accumulation on the surface thereof.
Claim 2
Dependent Claim
112 words
In a heated pressure roll fusing system for fusing toner images to copy sheets of an electrostatic copying machine in which a heated fuser roll is coated with an oil to prevent toner offset, an improved oil application pad comprising an oil transfer pad member positioned in contact with a heated fuser roll to apply oil received by said pad member continuously to the surface of said heated fuser roll during fusing of toner images to copy sheets, said pad member having a working surface contacting said heated fuser roll made of silicone rubber sponge material which has an embossed pattern to resist visual and non-visual offset accumulation on the surface thereof.
Claim 3
Dependent Claim
20 words
A pad device according to claim 1 wherein said pad member comprises a silicone rubber sponge layer reinforced by fibers.
Claim 4
Dependent Claim
26 words
A pad device according to claim 2 wherein said fibers are made of a material selected from a group comprising, ceramic, metallic, plastic or combinations thereof.
Claim 5
Dependent Claim
33 words
A pad device according to claim 1 wherein said pad member includes a plurality of layers, at least one of said layers being made of a heat stable material other than silicone rubber.
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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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |