US4970098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coatings for hot roll fusers
Assignee: IBM Information Products Corp
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Filing: 1990-04-18
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Granted: 1990-11-13
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Expires: 2010-04-18
Abstract
Abstract A roll for hot fusing having a coating comprising a cross-linked elastomeric random copolymer of dimethylsiloxane and diphenylsiloxane and three additives, (1) from 40 to 55% by weight of small zinc oxide particles, (2) from 5 to 10% by weight of small graphite particles and (3) from 1 to 5% by weight of ceric dioxide particles.
Inventors
- 👤 Juan Ayala-Esquilin
- 👤 William H. Dickstein
- 👤 James L. Hedrick, Jr.
- 👤 John C. Scott
- 👤 Arnold C. Yang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:41
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; C; C08; C08K; C08K3/00; C08K3/01; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1372; Y10T428/139; Y10T428/29; Y10T428/2982; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
A roll for fusing heat softenable toner material to a substrate, said roll comprising a core and an outer covering which comprises a crosslinked elastomeric random copolymer of dimethylsiloxane and diphenylsiloxane, from 40 to 55% by weight of particles of zinc oxide in the range of 100 to 500 nm diameter, from 5 to 10% by weight of graphite particles with major diameters no greater than 10 microns, and from 1 to 5% by weight of ceric dioxide particles from 0.2 to 3.0 microns in size.
Claim 2
Dependent Claim
86 words
A roll for fusing heat softenable toner material to a substrate, said roll comprising a core and an outer covering which comprises a crosslinked elastomeric random copolymer of dimethylsiloxane and diphenylsiloxane, from 40 to 55% by weight of particles of zinc oxide in the range of 100 to 500 nm diameter, from 5 to 10% by weight of graphite particles with major diameters no greater than 10 microns, and from 1 to 5% by weight of ceric dioxide particles from 0.2 to 3.0 microns in size.
Claim 3
Dependent Claim
27 words
A roll as claimed in claim 1 wherein the copolymer of dimethylsiloxane and diphenylsiloxane..has a weight concentration of phenyl in the range of from 20 to 50%.
Claim 4
Dependent Claim
15 words
A roll as claimed in claim 2 wherein the weight concentration of phenyl is 25%.
Claim 5
Dependent Claim
22 words
A roll as claimed in claim 1 wherein the copolymer has a molecular weight in the range of 10,000 to 30,000 g/mol.
Claim 6
Dependent Claim
17 words
A roll as claimed in claim 4 wherein the copolymer has a molecular weight of 20,000 g/mol.
Claim 7
Dependent Claim
17 words
A roll as claimed in claim 1 wherein the zinc oxide is present at 50% by weight.
Claim 8
Dependent Claim
16 words
A roll as claimed in claim 1 wherein the graphite is present at 8% by weight.
Claim 9
Dependent Claim
17 words
A roll as claimed in claim 1 wherein the ceric oxide is present at 2% by weight.
References Cited (Backward Citations)
US4807341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |