US5336539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuser roll containing nickel oxide particles for fixing toner to a substrate
Assignee: Eastman Kodak Co
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Filing: 1993-11-29
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Granted: 1994-08-09
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Expires: 2013-11-29
Abstract
Abstract The invention provides a fuser roll useful for heat-fixing an electrographic toner to a substrate, wherein the roll comprises a core having thereon a base cushion layer comprising a condensation-crosslinked poly(dimethylsiloxane) elastomer, characterized in that the base cushion layer has nickel oxide particles dispersed therein in a concentration of from 20 to 40 percent of the total volume of the base cushion layer. The base cushion layer of such a fuser roll has been unexpectedly found to exhibit only minimal weight loss, creep, and changes in hardness, over time, when subjected to conditions of elevated temperature and cyclic stress.
Inventors
- 👤 John J. Fitzgerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:38
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/16; C08G77/18; C08G77/20; C08G77/22; C08G77/26; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1386; Y10T428/139; Y10T428/25; Y10T428/31504; Y10T428/3154; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
57 words
A fuser roll useful for heat-fixing an electrographic toner to a substrate, wherein the roll comprises a core having thereon a base cushion layer comprising a condensation-crosslinked poly(dimethylsiloxane) elastomer, said base cushion layer having nickel oxide particles dispersed therein in a concentration of from 20 to 40 percent of the total volume of the base cushion layer.
Claim 2
Dependent Claim
57 words
A fuser roll useful for heat-fixing an electrographic toner to a substrate, wherein the roll comprises a core having thereon a base cushion layer comprising a condensation-crosslinked poly(dimethylsiloxane) elastomer, said base cushion layer having nickel oxide particles dispersed therein in a concentration of from 20 to 40 percent of the total volume of the base cushion layer.
Claim 3
Dependent Claim
28 words
The fuser roll of claim 1, wherein the concentration of nickel oxide particles is from 30 to 40 percent of the total volume of said base cushion layer.
Claim 4
Dependent Claim
64 words
The fuser roll of claim 1, wherein the condensation-crosslinked poly(dimethylsiloxane) elastomer has been formed by condensation reaction of silanol-terminated poly(dimethylsiloxane) polymeric units with multifunctional silanes, each of such silanes comprising a silicon atom bonded to at least three groups that are functional to condense with hydroxy end groups of the silanol-terminated poly(dimethylsiloxane) polymeric units to thereby crosslink the polymeric units through the silicon atom.
Claim 5
Dependent Claim
23 words
The fuser roll of claim 3, wherein the silanol-terminated poly(dimethylsiloxane) polymeric units have a weight average molecular weight of from 7,000 to 70,000.
Claim 6
Dependent Claim
26 words
The fuser roll of claim 3, wherein each of the functional groups of the multifunctional silanes independently comprises an acyloxy, alkenoxy, alkoxy, dialkylamino, or alkyliminoxy group.
Claim 7
Dependent Claim
35 words
The fuser roll of claim 3, wherein the functional groups of the multifunctional silanes comprise alkoxy groups, and wherein the condensation reaction has been carried out with the aid of a catalyst for the reaction.
Claim 8
Dependent Claim
18 words
The fuser roll of claim 1, wherein the roll has an oil-barrier layer over the base cushion layer.
Claim 9
Dependent Claim
15 words
The fuser roll of claim 7, further comprising an outermost layer over the oil-barrier layer.
Claim 10
Dependent Claim
25 words
The fuser roll of claim 8, wherein said outermost layer comprises vinyl-addition-crosslinked poly(dimethylsiloxane) containing silica and titania fillers, and the oil-barrier layer comprises poly(vinyldene fluoride-co-hexafluoropropylene).
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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) | 1997-08-08 | 1998-02-07 | 1998-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-08 | 2002-02-07 | 2002-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-08 | 2006-02-07 | 2006-08-09 | $7700.00 | Window Closed / Lapsed |