Patent US3884181A successfully refreshed from Google Patents.
US3884181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capillary baffle-constant oil height independent of oil level
Assignee: Xerox Corp
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Filing: 1973-12-26
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Granted: 1975-05-20
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Expires: 1993-12-26
Abstract
Abstract Apparatus for applying offset-preventing liquid to a fuser roll structure incorporated in a xerographic reproducing apparatus. The apparatus for applying the liquid comprises an applicator roll for providing a film of liquid to a wick assembly having a fluorocarbon polymer fiber layer contacting the fuser roll structure and a capillary forming member cooperating with the applicator roll to convey liquid from a sump area to parts of the applicator roll remote from the sump.
Inventors
- 👤 Raghulinga R Thettu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:17
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
Apparatus for fusing toner images to a substrate by heat and pressure, said apparatus comprising: a heated fuser member for softening said toner images; a backup member forming a nip with said heated member through which said substrate moves with said toner images contacting said heated fuser member; a sump containing a quantity of offset-preventing liquid; means contacting said heated fuser member for metering a thin coating of offset-preventing liquid thereto; applicator means adapted to contact said offset-preventing liquid and conveying it to said means contacting said heated fuser member; and means for conveying offset-preventing liquid from said sump to the surface of said applicator means at points remote from said sump of offset-preventing liquid, said conveying means comprising means cooperating with said applicator means to form a capillary therewith, said liquid being conveyed to said applicator at points intermediate said means contacting said fuser member and said sump, said conveying means being impervious to said offset preventing liquid.
Claim 2
Dependent Claim
159 words
Apparatus for fusing toner images to a substrate by heat and pressure, said apparatus comprising: a heated fuser member for softening said toner images; a backup member forming a nip with said heated member through which said substrate moves with said toner images contacting said heated fuser member; a sump containing a quantity of offset-preventing liquid; means contacting said heated fuser member for metering a thin coating of offset-preventing liquid thereto; applicator means adapted to contact said offset-preventing liquid and conveying it to said means contacting said heated fuser member; and means for conveying offset-preventing liquid from said sump to the surface of said applicator means at points remote from said sump of offset-preventing liquid, said conveying means comprising means cooperating with said applicator means to form a capillary therewith, said liquid being conveyed to said applicator at points intermediate said means contacting said fuser member and said sump, said conveying means being impervious to said offset preventing liquid.
Claim 3
Dependent Claim
40 words
Apparatus according to claim 1, wherein said applicator means comprises a cylinder and said means cooperating therewith comprises a crescent-shaped baffle supported at one end in said sump whereby the lower end of said baffle is immersed in said liquid.
Claim 4
Dependent Claim
20 words
Apparatus according to claim 2, wherein said crescent-shaped baffle has a plurality of ridges serving as standoffs for the baffle.
Claim 5
Dependent Claim
31 words
Apparatus according to claim 3 wherein said ridges are on the order of 2 mils in height to provide a 2 mil spacing between the baffle surface and the applicator surface.
Claim 6
Dependent Claim
17 words
Apparatus according to claim 3, wherein said ridges form angles with circumferential lines of said crescentshaped baffle.
Claim 7
Dependent Claim
15 words
Apparatus according to claim 2, wherein said crescent-shaped baffle is fabricated from a polyimide polymer.
Claim 8
Dependent Claim
15 words
Apparatus according to claim 2, wherein said crescent-shaped baffle is fabricated from a fluocarbon polymer.
Claim 9
Dependent Claim
47 words
Apparatus according to claim 2, wherein said crescent-shaped baffle has a non-stressed distance between its ends which is less than the chordal distance between the points of contact of said ends with said cylinder when said baffle is installed whereby said baffle is under tension when installed.
References Cited (Backward Citations)
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US3452181A
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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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |