US4150181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixing method using polysiloxane-fluorocarbon blends as release agents
Assignee: Xerox Corp
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Filing: 1977-07-01
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Granted: 1979-04-17
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Expires: 1997-07-01
Abstract
Abstract A contact fuser assembly and method for preventing toner offset on a heated fuser member in an electrostatic reproducing apparatus includes a base member coated with a solid, abrasion resistant material such as polyimide, poly (amide-imides), poly (imide-esters), polysulfone and aromatic polyamides. The fuser member is coated with a thin layer of polysiloxane fluid containing low molecular weight fluorocarbon. Toner offset on the heated fuser member is prevented by applying the polysiloxane fluid containing fluorocarbon to the solid, abrasion resistant surface of the fuser member.
Inventors
- 👤 Donald B. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:43
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
114 words
A method for fusing a toner image to a support sheet comprising contacting the support sheet bearing the toner image with the surface of a solid, abrasion resistant material selected from the group consisting of polyamide-imide, polyimide ester, aromatic polyamide and polysulfone, for a time and at a temperature sufficient to permit heating and fusion of the toner image to the support sheet; the surface of the abrasion resistant material having a thin layer of a release agent comprising a mixture of a polysiloxane fluid and fluorocarbon polymer thereon; and separating the support from the surface of the abrasion resistant material whereby the heated toner separates from the surface of the abrasion resistant material.
Claim 2
Independent Claim
114 words
A method for fusing a toner image to a support sheet comprising contacting the support sheet bearing the toner image with the surface of a solid, abrasion resistant material selected from the group consisting of polyamide-imide, polyimide ester, aromatic polyamide and polysulfone, for a time and at a temperature sufficient to permit heating and fusion of the toner image to the support sheet; the surface of the abrasion resistant material having a thin layer of a release agent comprising a mixture of a polysiloxane fluid and fluorocarbon polymer thereon; and separating the support from the surface of the abrasion resistant material whereby the heated toner separates from the surface of the abrasion resistant material.
Claim 3
Dependent Claim
28 words
The method of claim 1 wherein said fluorocarbon polymer is selected from the group consisting of polytetrafluoroethylene, polyhexafluoropropylene, fluorinated ethylene-propylene polymer, tetrafluoroethylene/hexafluoropropylene copolymer, fluorocarbon telomer, and mixtures thereof.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein the polysiloxane fluid is a silicone oil.
Claim 5
Dependent Claim
11 words
The method of claim 3 wherein the silicone oil is polydimethylsiloxane.
Claim 6
Dependent Claim
16 words
The method of claim 3 wherein the silicone oil is a polyalkylsiloxane having functional groups thereon.
Claim 7
Dependent Claim
23 words
The method of claim 1 wherein the thickness of the release agent on the fuser member is about 0.5 to about 10 microns.
Claim 8
Dependent Claim
19 words
The method of claim 1 comprising continuously applying the release agent to the surface of the abrasion resistant material.
Claim 9
Dependent Claim
24 words
The method of claim 1 wherein the release agent comprises from about 1.0 weight percent to about 80.0 weight percent of the fluorocarbon polymer.
Claim 10
Dependent Claim
24 words
The method of claim 1 wherein the release agent comprises from about 5.0 weight percent to about 20.0 weight percent of the fluorocarbon polymer.
Claim 11
Dependent Claim
17 words
The method of claim 1 wherein the fluorocarbon polymer is a solid dispersed in the polysiloxane fluid.
Claim 12
Dependent Claim
18 words
The method of claim 1 wherein the fluorocarbon polymer is a liquid substantially miscible with the polysiloxane fluid.
Claim 13
Dependent Claim
18 words
The method of claim 1 wherein the fluorocarbon polymer is a liquid substantially immiscible with the polysiloxane fluid.
Claim 14
Independent Claim
92 words
A method of preventing toner offset when fusing toner images to a substrate with a heated fuser member having a solid, abrasion resistant surface material selected from the group consisting of polyamide-imide, polyimide ester, aromatic polyamide and polysulfone comprising (a) coating the surface of the heated fuser member in an electrostatic reproducing apparatus with a release agent comprising a mixture of a silicone oil and fluorocarbon polymer; (b) contacting the toner images on the substrate for a period of time sufficient to soften the toner; and (c) allowing the toner to cool.
Claim 15
Independent Claim
92 words
A method of preventing toner offset when fusing toner images to a substrate with a heated fuser member having a solid, abrasion resistant surface material selected from the group consisting of polyamide-imide, polyimide ester, aromatic polyamide and polysulfone comprising (a) coating the surface of the heated fuser member in an electrostatic reproducing apparatus with a release agent comprising a mixture of a silicone oil and fluorocarbon polymer; (b) contacting the toner images on the substrate for a period of time sufficient to soften the toner; and (c) allowing the toner to cool.
Claim 16
Dependent Claim
28 words
The method of claim 13 wherein said fluorocarbon polymer is selected from the group consisting of polytetrafluoroethylene, polyhexafluoropropylene, fluorinated ethylene-propylene polymer, tetrafluoroethylene/hexafluoropropylene copolymer, fluorocarbon telomer and mixtures thereof.
Claim 17
Dependent Claim
19 words
The method of claim 13 wherein the thickness of the release agent is about 0.5 to about 10 microns.
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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) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |