Patent US4518655A successfully refreshed from Google Patents.
US4518655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fusing member for electrostatographic copiers
Assignee: Xerox Corp
•
Filing: 1983-11-25
•
Granted: 1985-05-21
•
Expires: 2003-11-25
Abstract
Abstract A fuser member for electrostatographic reproducing apparatus is provided which has a rigid core having coated thereon a thin layer of a composition which comprises the crosslinked product of a mixture of about 100 parts by weight alpha omega-hydroxypolydimethylsiloxane, about 190 to 250 parts by weight total alumina, comprising from about 60 to about 90 percent by weight of finely divided tabular alumina and from about 10 to about 40 percent by weight calcined alumina, together with effective amounts of a crosslinking agent and a crosslinking catalyst.
Inventors
- 👤 Arnold W. Henry
- 👤 Jack C. Azar
- 👤 John Sagal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:01
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
139 words
A thermally conductive fuser member for use in an electrostatographic reproducing machine comprising a rigid base, a thin deformable layer of a composition coated thereon, said composition comprising the crosslinked product of a mixture of about 100 parts by weight of alpha omega-hydroxypolydimethylsiloxane having a number average molecular weight between about 5,000 to about 20,000, about 190 to 250 parts by weight of alumina, said alumina comprising from about 60 to about 90 percent by weight of finely divided tabular alumina having a particle size less than about 100 mesh in size and from about 10 to about 40 percent by weight of finely divided calcined alumina having a particle size less than about 1 micrometer, a crosslinking agent and a crosslinking catalyst, said crosslinking agent and catalyst being present in amounts sufficient to promote crosslinking of said siloxane.
Claim 2
Dependent Claim
139 words
A thermally conductive fuser member for use in an electrostatographic reproducing machine comprising a rigid base, a thin deformable layer of a composition coated thereon, said composition comprising the crosslinked product of a mixture of about 100 parts by weight of alpha omega-hydroxypolydimethylsiloxane having a number average molecular weight between about 5,000 to about 20,000, about 190 to 250 parts by weight of alumina, said alumina comprising from about 60 to about 90 percent by weight of finely divided tabular alumina having a particle size less than about 100 mesh in size and from about 10 to about 40 percent by weight of finely divided calcined alumina having a particle size less than about 1 micrometer, a crosslinking agent and a crosslinking catalyst, said crosslinking agent and catalyst being present in amounts sufficient to promote crosslinking of said siloxane.
Claim 3
Dependent Claim
70 words
A thermally conductive fuser member according to claim 1, wherein said alumina is present in an amount of about 250 parts per 100 parts of said siloxane, said tabular alumina is present in an amount of from about 60 to about 80 percent by weight of said alumina and said calcined alumina is present in an amount of from about 20 to about 40 percent by weight of said alumina.
Claim 4
Dependent Claim
42 words
A thermally conductive fuser member according to claim 2, wherein said tabular alumina is present in an amount of about 70 percent by weight and the calcined alumina is present in an amount of about 30 percent by weight of said alumina.
Claim 5
Dependent Claim
19 words
A thermally conductive fuser member according to claim 1, wherein said tabular alumina is about 325 mesh in size.
Claim 6
Dependent Claim
30 words
A thermally conductive fuser member of claim 1, wherein said rigid base is a metallic roll and wherein said thin layer is from about 10 to about 100 mils thick.
Claim 7
Dependent Claim
29 words
A thermally conductive fuser member according claim 5, wherein said metallic roll is made of aluminum and said thin layer is from about 30 to about 80 mils thick.
Claim 8
Dependent Claim
22 words
A thermally conductive fuser member according to claim 6, wherein said thin layer is from about 60 to about 70 mils thick.
Claim 9
Dependent Claim
52 words
A thermally conductive fuser member according to claim 1, wherein said crosslinking agent is condensed tetraethylorthosilicate present in an amount from about 6 to about 9 parts by weight, and wherein said crosslinking catalyst is dibutyltin dilaurate or bis(dibutylchlorotin) oxide present in an amount from about 0.25 to 1.8 parts by weight.
References Cited (Backward Citations)
US3269981A
Cited
US3294732A
Cited
US3296161A
Cited
CA658954A
Cited
US3231527A
Cited
US2710289A
Cited
US2999077A
Cited
US2934464A
Cited
US3240731A
Cited
US3328481A
Cited
US3451964A
Cited
US3535357A
Cited
US3586699A
Cited
US3795033A
Cited
US3631220A
Cited
US3696127A
Cited
US3941741A
Cited
US3879319A
Cited
US3848305A
Cited
US3809854A
Cited
US3849462A
Cited
US3902845A
Cited
US4075390A
Cited
US4145504A
Cited
US4074001A
Cited
US4101499A
Cited
US4078286A
Cited
US4064313A
Cited
US4149797A
Cited
US4373239A
Cited
US4360566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |