US4357388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot roll fuser
Assignee: IBM Information Products Corp
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Filing: 1981-12-02
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Granted: 1982-11-02
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Expires: 2001-12-02
Abstract
Abstract A xerographic hot roll fuser whose hot roll's soft, elastomeric outer surface is formed of a mixture of 70 parts polymethylvinylsiloxane where the vinyl groups are terminating groups, and 30 parts of a blended polymer consisting of the polymethylvinylsiloxane and polymethyl-H-siloxane in which the hydride function is greater than two.
Inventors
- 👤 James C. Minor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:10
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
A fixing roll comprising a rigid core and an outer resilient elastomeric sleeve which is a mixture of about 70 parts by weight part A and about 30 parts by weight part B; wherein part A is a polymethylvinylsiloxane polymer where the vinyl groups are terminating groups, and of a molecular weight average of about 17,700 and a polydispersity of about 2.85, and includes about 47.7% by weight of a finely divided mineral silica, and a small amount of an organic complex of platinum; and part B is a two-part polymer of said polymethylvinylsiloxane of a molecular weight average of about 14,200 and a polydispersity of about 4.21, and polymethyl-H-siloxane in which the hydride function is greater than two, and of a molecular weight average of about 3,480 and a polydispersity of about 1.56, and includes about 45% by weight of said finely divided mineral silica, the after-curing crosslink density of said sleeve being from 15 to 23×10 -5 mole crosslinks per gram.
Claim 2
Dependent Claim
163 words
A fixing roll comprising a rigid core and an outer resilient elastomeric sleeve which is a mixture of about 70 parts by weight part A and about 30 parts by weight part B; wherein part A is a polymethylvinylsiloxane polymer where the vinyl groups are terminating groups, and of a molecular weight average of about 17,700 and a polydispersity of about 2.85, and includes about 47.7% by weight of a finely divided mineral silica, and a small amount of an organic complex of platinum; and part B is a two-part polymer of said polymethylvinylsiloxane of a molecular weight average of about 14,200 and a polydispersity of about 4.21, and polymethyl-H-siloxane in which the hydride function is greater than two, and of a molecular weight average of about 3,480 and a polydispersity of about 1.56, and includes about 45% by weight of said finely divided mineral silica, the after-curing crosslink density of said sleeve being from 15 to 23×10 -5 mole crosslinks per gram.
Claim 3
Dependent Claim
18 words
The fixing roll of claim 1 wherein said polymethylvinylsiloxane is α, ω-Bis-dimethylvinylsiloxypolydimethylsiloxane, and wherein said polymethyl-H-siloxane is nonlinear.
Claim 4
Dependent Claim
18 words
The fixing roll of claim 1 or 2 wherein said mineral silica is of about 5 micron size.
Claim 5
Dependent Claim
29 words
The fixing roll of claim 1 or 2 wherein said mineral silica is of about 5 micron size, and wherein part A includes a small amount of carbon black.
Claim 6
Dependent Claim
22 words
The fixing roll of claim 1 or 2 wherein said elastomeric sleeve comprises the brand Sylgard 170 part A and part B.
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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) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |