US3989005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil metering blade device
Assignee: Xerox Corp
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Filing: 1975-10-29
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Granted: 1976-11-02
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Expires: 1995-10-29
Abstract
Abstract An improved oil metering blade device for maintaining a uniform film of oil on the surface of a fuser roll of a heated pressure fusing apparatus for fusing toner images. The blade member is made from any suitable elastic material such as rubber with durometer between 57 and 67 and has a rectangular cross-section. In vicinity where it contacts the fuser roll surface the blade with a radially curved surface of between about 5 to about 20 mils.
Inventors
- 👤 Edward F. Bowler, Jr.
- 👤 Thomas A. Rengert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:28
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
138 words
In an oil wetted heated pressure roll fusing apparatus for fusing toner images to copy sheets produced from a xerographic copying machine, an improved oil metering blade device comprising: a frame, a blade holder assembly positioned on said frame, including a U-shaped blade holding member which is pivotable on an axis, an elongated blade member made of a rubber material having a durometer ranging from 57 to about 67 received in said blade holding member and positioned in contact with an oil wetted fuser roll surface to effect a uniform oil thereon, spring means for applying a loading force about said axis on said blade holding member and blade member against said fuser roll surface, said blade member having at least one longitudinally extending portion shaped as a radially curved surface where it contacts said fuser roll surface.
Claim 2
Dependent Claim
138 words
In an oil wetted heated pressure roll fusing apparatus for fusing toner images to copy sheets produced from a xerographic copying machine, an improved oil metering blade device comprising: a frame, a blade holder assembly positioned on said frame, including a U-shaped blade holding member which is pivotable on an axis, an elongated blade member made of a rubber material having a durometer ranging from 57 to about 67 received in said blade holding member and positioned in contact with an oil wetted fuser roll surface to effect a uniform oil thereon, spring means for applying a loading force about said axis on said blade holding member and blade member against said fuser roll surface, said blade member having at least one longitudinally extending portion shaped as a radially curved surface where it contacts said fuser roll surface.
Claim 3
Dependent Claim
20 words
Apparatus according to claim 1 wherein the radius of said curved surface ranges from about 5 to about 20 mils.
Claim 4
Dependent Claim
12 words
Apparatus according to claim 2 wherein said radius is about 10 mils.
Claim 5
Dependent Claim
14 words
Apparatus according to claim 1 wherein said blade member has a generally rectangular cross-section.
Claim 6
Dependent Claim
24 words
Apparatus according to claim 4 wherein said blade member has a radially curved shape formed on a plurality of the longitudinally extending portions thereof.
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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |