Patent US4075390A successfully refreshed from Google Patents.
US4075390A
Expired / Lapsed
US
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Fusing surface and method for fixing toner
Assignee: Xerox Corp
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Filing: 1976-10-04
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Granted: 1978-02-21
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Expires: 1996-10-04
Abstract
Abstract A silicone rubber surface for fixing resinous powder images to a substrate at elevated temperatures in a xerographic reproducing apparatus is disclosed. The silicone rubber surface prevents offset of the image by supplying inherently a release material to the surface. Dispersed in the silicone rubber is an agent capable of supplying water over a period of time at elevated temperatures, and the release material is a degradation product of the silicone rubber provided by the hydrolysis of the silicone rubber.
Inventors
- 👤 Richard J. Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:03
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249997; Y10T428/25; Y10T428/252; Y10T428/256; Y10T428/257; Y10T428/259; Y10T428/26; Y10T428/269; Y10T428/31; Y10T428/31504; Y10T428/31536; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
117 words
An article for use in a xerographic reproducing apparatus for fixing a resin-based powder image to a substrate at elevated temperatures, comprising a structure having a surface of silicone rubber having substantially no reinforcing filler and being capable of forming a degradation product in the presence of water at elevated temperatures and having an agent capable of supplying water dispersed therein in an amount which provides sufficient water to cause the degradation of the silicone rubber and the formation of the degradation product on the surface, said degradation product acting as a release material and having an adhesion for the resin-based powder which is less than the adhesion which the fused resin-based powder has for the substrate.
Claim 2
Dependent Claim
117 words
An article for use in a xerographic reproducing apparatus for fixing a resin-based powder image to a substrate at elevated temperatures, comprising a structure having a surface of silicone rubber having substantially no reinforcing filler and being capable of forming a degradation product in the presence of water at elevated temperatures and having an agent capable of supplying water dispersed therein in an amount which provides sufficient water to cause the degradation of the silicone rubber and the formation of the degradation product on the surface, said degradation product acting as a release material and having an adhesion for the resin-based powder which is less than the adhesion which the fused resin-based powder has for the substrate.
Claim 3
Dependent Claim
25 words
The surface of claim 1 wherein the silicone rubber having an agent capable of supplying water dispersed therein is at least 0.5 mil in thickness.
Claim 4
Dependent Claim
27 words
The surface of claim 1 wherein the silicone rubber having an agent capable of supplying water dispersed therein is about 6 to about 10 mils in thickness.
Claim 5
Dependent Claim
24 words
The surface of claim 1 wherein the agent capable of supplying water is a filler which acts as an absorbent or reservoir for water.
Claim 6
Dependent Claim
20 words
The surface of claim 4 wherein the filler which acts as an absorbent or reservoir for water is hydrated starch.
Claim 7
Dependent Claim
20 words
The surface of claim 4 wherein the filler which acts as an absorbent or reservoir for water is hydrated mineral.
Claim 8
Dependent Claim
21 words
The surface of claim 4 wherein the filler which acts as an absorbent or reservoir for water is colloidal silica gel.
Claim 9
Dependent Claim
23 words
The surface of claim 1 wherein the agent capable of supplying water is a material which decomposes at elevated temperatures to form water.
Claim 10
Dependent Claim
30 words
The surface of claim 1 wherein the agent capable of supplying water is water -containing capsules which rupture at elevated temperatures and/or pressure to release water into the silicone rubber.
Claim 11
Dependent Claim
29 words
The surface of claim 1 wherein the agent capable of supplying water comprises at least two reactants, a product of which is water when the reaction thereof is initiated.
Claim 12
Dependent Claim
24 words
The surface of claim 1 wherein the agent capable of supplying water is at least 0.05 percent (by weight based upon the silicone rubber).
Claim 13
Dependent Claim
27 words
The surface of claim 1 wherein the agent capable of supplying water is preferably about 1.0 to about 5.0 percent (by weight based upon the silicone rubber).
Claim 14
Dependent Claim
14 words
The surface of claim 1 wherein the silicone rubber is a polymethyl phenyl siloxane.
Claim 15
Dependent Claim
13 words
The surface of claim 1 wherein the silicone rubber is a polydialkyl siloxane.
Claim 16
Dependent Claim
11 words
The surface of claim 14 wherein the silicone rubber is fluorinated.
Claim 17
Dependent Claim
15 words
The surface of claim 1 wherein the silicone rubber is a vulcanized poly methylvinyl siloxane.
Claim 18
Dependent Claim
10 words
the surface of claim 1 comprising a fuser roll member.
Claim 19
Dependent Claim
83 words
A fuser member for an electrostatic copier comprising a structure having a substrate coated with a water-degradable silicone rubber having substantially no reinforcing filler and containing therein an agent capable of supplying water in an amount which provides sufficient water to cause the degradation of the silicone rubber at elevated temperatures, the surface of said coating comprising the degradation product of the silicone rubber, the degradation product being capable of acting as a release material for tackified resin-based powder or toner placed thereon.
Claim 20
Dependent Claim
83 words
A fuser member for an electrostatic copier comprising a structure having a substrate coated with a water-degradable silicone rubber having substantially no reinforcing filler and containing therein an agent capable of supplying water in an amount which provides sufficient water to cause the degradation of the silicone rubber at elevated temperatures, the surface of said coating comprising the degradation product of the silicone rubber, the degradation product being capable of acting as a release material for tackified resin-based powder or toner placed thereon.
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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) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |