Patent US4711818A successfully refreshed from Google Patents.
US4711818A
Expired / Lapsed
US
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Fusing member for electrostatographic reproducing apparatus
Assignee: Xerox Corp
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Filing: 1986-05-27
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Granted: 1987-12-08
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Expires: 2006-05-27
Abstract
Abstract A thermally conductive dry release fuser member and fusing method for use in electrostatic reproducing machine without the application of a release agent is described, wherein the fusing member comprises a base support member and a thin deformable layer of a composition coated thereon, the composition comprising the crosslinked product of a mixture of at least one addition curable vinyl terminated or vinyl pendant polyfluoroorganosiloxane, filler, heat stabilizer, a crosslinking agent and a crosslinking catalyst.
Inventors
- 👤 Arnold W. Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:55
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; C; C08; C08L; C08L83/00; C08L83/04; C08L83/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
146 words
A thermally conductive dry release fuser member for use in an electrostatographic reproducing machine without the application of a release agent comprising a base support member and a thin deformable layer of a composition coated thereon, said composition comprising the crosslinked product of a mixture of about; (a) 100 parts by weight of at least one liquid addition curable vinyl terminated or vinyl pendant polyfluoroorganosiloxane having the formula: ##STR5## where A and D are methyl or vinyl, R is methyl, vinyl or trifluoropropyl provided that the vinyl functionality is at least 2, ##EQU4## (b) from about 2 to about 300 parts by weight filler, (c) from about 0 to about 5 parts by weight of a heat stabilizer, (d) a crosslinking agent and a crosslinking catalyst, said crosslinking agent and catalyst being present in an amount sufficient to promote crosslinking of said at least one polyfluoroorganosiloxane.
Claim 2
Dependent Claim
146 words
A thermally conductive dry release fuser member for use in an electrostatographic reproducing machine without the application of a release agent comprising a base support member and a thin deformable layer of a composition coated thereon, said composition comprising the crosslinked product of a mixture of about; (a) 100 parts by weight of at least one liquid addition curable vinyl terminated or vinyl pendant polyfluoroorganosiloxane having the formula: ##STR5## where A and D are methyl or vinyl, R is methyl, vinyl or trifluoropropyl provided that the vinyl functionality is at least 2, ##EQU4## (b) from about 2 to about 300 parts by weight filler, (c) from about 0 to about 5 parts by weight of a heat stabilizer, (d) a crosslinking agent and a crosslinking catalyst, said crosslinking agent and catalyst being present in an amount sufficient to promote crosslinking of said at least one polyfluoroorganosiloxane.
Claim 3
Dependent Claim
24 words
The fuser member of claim 1, wherein said mixture includes from about 5 parts to about 30 parts by weight of a polyorganosiloxane oil.
Claim 4
Dependent Claim
17 words
The fuser member of claim 1, wherein said base support member comprises a rigid cylindrical metallic roll.
Claim 5
Dependent Claim
25 words
The fuser member of claim 3, wherein said metallic roll has a high temperature resistant elastomeric layer intermediate said roll surface and said thin layer.
Claim 6
Dependent Claim
20 words
The fuser member of claim 3, wherein said thin layer is from about 7 mils to about 100 mils thick.
Claim 7
Dependent Claim
36 words
The fuser member of claim 4, wherein said intermediate layer and thin layer have a combined thickness from about 7 mils to about 100 mils with the thin layer being from about 1 to 4 mils.
Claim 8
Dependent Claim
12 words
The fuser member of claim 3, wherein said metallic roll is aluminum.
Claim 9
Dependent Claim
32 words
The fuser member of claim 1, wherein ferric oxide is present in an amount of from about 0.2 to about 5 parts per 100 parts of said polyfluoroorganosiloxane as a heat stabilizer.
Claim 10
Dependent Claim
25 words
The fuser member of claim 4, wherein said intermediate layer comprises a crosslinked product of a liquid addition curable vinyl terminated or vinyl pendant polyorganosiloxane.
Claim 11
Dependent Claim
21 words
The fuser member of claim 1, wherein said crosslinking agent is a methylhydromethyltrifluoropropyl siloxane copolymer with about 15% to 70% methylhydrogen.
Claim 12
Dependent Claim
78 words
The fuser member of claim 1, wherein said mixture includes from about 10 to about 900 parts by weight of at least one liquid addition curable vinyl terminated or vinyl pendant polyorganosiloxane having the formula: ##STR6## where A', X' and R' are methyl or vinyl provided the vinyl functionality is at least 2, ##EQU5## up to about 300 parts by weight of additional filler and sufficient additional crosslinking agent and crosslinking catalyst to promote crosslinking of said polyorganosiloxane.
Claim 13
Independent Claim
173 words
The method of heat fusing toner images to a substrate without the application of a release agent comprising pressure contacting said toner image on a substrate with a dry release fuser member whole surface is heated to a temperature effective to fuse said toner image, said fuser member comprising a base support member and a thin deformable layer of a composition coated thereon, said composition comprising the crosslinked product of a mixture of about; (a) 100 parts by weight of at least one liquid addition curable vinyl terminated or vinyl pendant polyfluoroorganosiloxane having the formula: ##STR7## where A and D are methyl or vinyl, R is methyl, vinyl, or trifluoropropyl provided that the vinyl functionality is at least 2 ##EQU6## (b) from about 2 to about 300 parts by weight filler, (c) from about 0 to about 5 parts by weight of a heat stabilizer, (d) a crosslinking agent and a crosslinking catalyst, said crosslinking agent and catalyst being present in an amount sufficient to promote crosslinking of said at least one polyfluoroorganosiloxane.
Claim 14
Independent Claim
173 words
The method of heat fusing toner images to a substrate without the application of a release agent comprising pressure contacting said toner image on a substrate with a dry release fuser member whole surface is heated to a temperature effective to fuse said toner image, said fuser member comprising a base support member and a thin deformable layer of a composition coated thereon, said composition comprising the crosslinked product of a mixture of about; (a) 100 parts by weight of at least one liquid addition curable vinyl terminated or vinyl pendant polyfluoroorganosiloxane having the formula: ##STR7## where A and D are methyl or vinyl, R is methyl, vinyl, or trifluoropropyl provided that the vinyl functionality is at least 2 ##EQU6## (b) from about 2 to about 300 parts by weight filler, (c) from about 0 to about 5 parts by weight of a heat stabilizer, (d) a crosslinking agent and a crosslinking catalyst, said crosslinking agent and catalyst being present in an amount sufficient to promote crosslinking of said at least one polyfluoroorganosiloxane.
Claim 15
Dependent Claim
23 words
The method of claim 12, wherein said mixture includes from about 5 parts to about 30 parts by weight of a polyorganosiloxane oil.
Claim 16
Dependent Claim
16 words
The method of claim 12, wherein said base support member comprises a rigid cylindrical metallic roll.
Claim 17
Dependent Claim
24 words
The method of claim 14, wherein said metallic roll has a high temperature resistant elastomeric layer intermediate said roll surface and said thin layer.
Claim 18
Dependent Claim
19 words
The method of claim 14, wherein said thin layer is from about 7 mils to about 100 mils thick.
Claim 19
Dependent Claim
35 words
The method of claim 15, wherein said intermediate layer and thin layer have a combined thickness from about 7 mils to about 100 mils with the thin layer being from about 1 to 4 mils.
Claim 20
Dependent Claim
11 words
The method of claim 14, wherein said metallic roll is aluminum.
Claim 21
Dependent Claim
31 words
The method of claim 12, wherein ferric oxide is present in an amount of from about 0.2 to about 5 parts per 100 parts of said polyfluoroganosiloxane as a heat stabilizer.
Claim 22
Dependent Claim
24 words
The method of claim 14, wherein said intermediate layer comprises a crosslinked product of a liquid addition curable vinyl terminated or vinyl pendant polyorganosiloxane.
Claim 23
Dependent Claim
20 words
The method of claim 12, wherein said crosslinking agent is a methylhydromethyltrifluoropropyl siloxane copolymer with about 15% to 70% methylhydrogen.
Claim 24
Dependent Claim
77 words
The method of claim 12, wherein said mixture includes from about 10 to about 900 parts by weight of at least one liquid addition curable vinyl terminated or vinyl pendant polyorganosiloxane having the formula: ##STR8## where A', X' and R' are methyl or vinyl provided the vinyl functionality is at least 2, ##EQU7## up to about 300 parts by weight of additional filler and sufficient additional crosslinking agent and crosslinking catalyst to promote crosslinking of said polyorganosiloxane.
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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) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |