US5464703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tin oxide filled dimethylsiloxane-fluoroalkylsiloxane fuser roll for fixing toner to a substrate
Assignee: Eastman Kodak Co
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Filing: 1994-06-29
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Granted: 1995-11-07
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Expires: 2014-06-29
Abstract
Abstract A fuser member useful for heat-fixing an electrographic toner to a substrate, a composition of matter and a preparation method. The fuser member has a core and a base cushion layer overlying the core. The base cushion layer includes a crosslinked poly(dimethylsiloxane-fluoroalkylsiloxane) elastomer that has tin oxide particles dispersed therein in a concentration of from 20 to 40 percent of the total volume of the base cushion layer.
Inventors
- 👤 Wayne T. Ferrar
- 👤 William B. Vreeland
- 👤 Charles E. Hewitt
- 👤 John J. Fitzgerald
- 👤 Tonya D. Binga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:41
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; B; B32; B32B; B32B25/00; B32B25/14; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/25; Y10T428/258; Y10T428/29; Y10T428/2902; Y10T428/31504; Y10T428/3154; Y10T428/31652; Y10T428/31663; Y10T428/31678
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
63 words
A fuser member useful for heat-fixing an electrographic toner to a substrate, said fuser member having a core and a base cushion layer covering said core, said base cushion layer comprising a crosslinked poly(dimethylsiloxane-fluoroalkylsiloxane) elastomer, said base cushion layer having tin oxide particles dispersed therein in a concentration of from 20 to 40 percent of the total volume of said base cushion layer.
Claim 2
Dependent Claim
63 words
A fuser member useful for heat-fixing an electrographic toner to a substrate, said fuser member having a core and a base cushion layer covering said core, said base cushion layer comprising a crosslinked poly(dimethylsiloxane-fluoroalkylsiloxane) elastomer, said base cushion layer having tin oxide particles dispersed therein in a concentration of from 20 to 40 percent of the total volume of said base cushion layer.
Claim 3
Dependent Claim
17 words
The fuser member of claim 1, wherein said elastomer is less than about 20 mole percent fluoroalkylsiloxane.
Claim 4
Dependent Claim
19 words
The fuser member of claim 1, wherein said elastomer is from about 3 to about 15 mole percent fluoroalkylsiloxane.
Claim 5
Dependent Claim
28 words
The fuser member of claim 3, wherein the concentration of tin oxide particles is from 30 to 40 percent of the total volume of said base cushion layer.
Claim 6
Dependent Claim
28 words
The fuser member of claim 1, wherein the concentration of tin oxide particles is from 30 to 40 percent of the total volume of said base cushion layer.
Claim 7
Dependent Claim
23 words
The fuser member of claim 7, wherein said poly(dimethylsiloxane-fluoroalkylsiloxane) has been formed by condensation reaction of silanol-terminated poly(dimethylsiloxane) polymeric units with difunctional fluoroalkylsilanes.
Claim 8
Dependent Claim
23 words
The fuser member of claim 1, wherein said crosslinked poly(dimethylsiloxane-fluoroalkylsiloxane) elastomer has been formed by condensation reaction of poly(dimethylsiloxane-fluoroalkylsiloxane) and polyfunctional crosslinking agent.
Claim 9
Dependent Claim
26 words
The fuser member of claim 6, wherein the silanol-terminated poly(dimethylsiloxane-fluoroalkylsiloxane) polymeric units have a number average molecular weight of from 1×10 3 to 1×10 6 .
Claim 10
Dependent Claim
16 words
The fuser member of claim 6, wherein said functional groups of said difunctional silanes are chloro.
Claim 11
Dependent Claim
20 words
The fuser member of claim 1, wherein said member has at least one additional layer over said base cushion layer.
Claim 12
Dependent Claim
34 words
The fuser member of claim 1, wherein said member has, over said base cushion layer, a first additional layer comprising vinyl-addition-crosslinked poly(dimethylsiloxane) containing silica and titania fillers, and an oil-barrier layer comprising poly(vinylidene fluoride-cohexafluoropropylene).
Claim 13
Dependent Claim
150 words
A fuser member useful for heat-fixing an electrographic toner to a substrate, said fuser member comprising a core and a base cushion layer covering said core, said base cushion layer including tin oxide particles dispersed therein in a concentration of from about 20 to about 40 percent of the total volume of said base cushion layer and a crosslinked polymer having chains of the general structure: ##STR4## wherein R 1 is fluoroalkyl having from about 1 to 18 carbons and from about 3 to 37 fluorine atoms; R 2 is alkyl having from 1 to 6 carbons; x/y is from about 99:1 to 70:30; and n is an integer such that said chains have a number average molecular weight of from 1×10 3 to 1×10 6 ; said base cushion layer being more resistant to cyclic stress induced degradation than a base cushion layer comprising aluminum oxide filled condensation-crosslinked polydimethylsiloxane.
Claim 14
Dependent Claim
150 words
A fuser member useful for heat-fixing an electrographic toner to a substrate, said fuser member comprising a core and a base cushion layer covering said core, said base cushion layer including tin oxide particles dispersed therein in a concentration of from about 20 to about 40 percent of the total volume of said base cushion layer and a crosslinked polymer having chains of the general structure: ##STR4## wherein R 1 is fluoroalkyl having from about 1 to 18 carbons and from about 3 to 37 fluorine atoms; R 2 is alkyl having from 1 to 6 carbons; x/y is from about 99:1 to 70:30; and n is an integer such that said chains have a number average molecular weight of from 1×10 3 to 1×10 6 ; said base cushion layer being more resistant to cyclic stress induced degradation than a base cushion layer comprising aluminum oxide filled condensation-crosslinked polydimethylsiloxane.
Claim 15
Dependent Claim
22 words
The fuser member of claim 12 wherein R 1 has the general structure: --(CF.sub.2).sub.d --CF.sub.3 wherein d is from 3 to 5.
Claim 16
Dependent Claim
10 words
The fuser member of claim 13 wherein d is 5.
Claim 17
Dependent Claim
11 words
The fuser member of claim 12 wherein R 2 is methyl.
Claim 18
Dependent Claim
14 words
The fuser member of claim 12 wherein x/y is from about 98:2 to 80:20.
Claim 19
Dependent Claim
13 words
The fuser member of claim 12 wherein x/y is from 94:6 to 87:13.
Claim 20
Dependent Claim
38 words
The fuser member of claim 14 wherein said tin oxide particles are from 20 to 40 percent of the total volume of the base cushion layer, R 2 is methyl, and x/y is from about 98:2 to 80:20.
Claim 21
Dependent Claim
63 words
A fuser member useful for heat-fixing an electrographic toner to a substrate, said fuser member comprising a core and a base cushion layer covering said core, said base cushion layer comprising a condensation-crosslinked poly(dimethylsiloxane-fluoroalkylsiloxane) elastomer, said base cushion layer having tin oxide particles dispersed therein in a concentration of from 20 to 40 percent of the total volume of the base cushion layer.
Claim 22
Dependent Claim
63 words
A fuser member useful for heat-fixing an electrographic toner to a substrate, said fuser member comprising a core and a base cushion layer covering said core, said base cushion layer comprising a condensation-crosslinked poly(dimethylsiloxane-fluoroalkylsiloxane) elastomer, said base cushion layer having tin oxide particles dispersed therein in a concentration of from 20 to 40 percent of the total volume of the base cushion layer.
Claim 23
Dependent Claim
14 words
The fuser member of claim 7 wherein said polyfuctional crosslinking agent is polyfunctional silane.
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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) | 1998-11-06 | 1999-05-08 | 1999-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-06 | 2003-05-08 | 2003-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-06 | 2007-05-08 | 2007-11-07 | $7700.00 | Window Closed / Lapsed |