US3902845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal foam under conformable surface replaceable
Assignee: Xerox Corp
•
Filing: 1973-12-26
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Granted: 1975-09-02
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Expires: 1993-12-26
Abstract
Abstract Fuser apparatus for affixing toner images to a substrate by means of heat and pressure. The apparatus is characterized by a heated fuser roll which is internally heated and has a reservoir of offset preventing material supported by a tubular member comprising the core or base of the fuser roll. A resilient, low surface energy layer of a lesser thickness than the reservoir is adhered thereto. The reservoir comprises a porous, thermally conductive member through which offset preventing material diffuses during operation of the apparatus. The offset preventing material also diffuses through the resilient layer and forms a thin coating on the surface thereof to form a boundary layer for preventing toner from offsetting to the resilient material.
Inventors
- 👤 Richard J Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:44
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2017; G03G15/2025
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
98 words
Apparatus including a fuser member for utilization in fixing toner images to a substrate by pressure and heat comprising: a core; a thermally conductive relatively non-deformable porous layer on said core, said porous layer forming a reservoir containing offset preventing liquid; a deformable layer carried by said thermally conductive porous layer, said deformable layer comprising a material having a relatively low affinity for the toner forming said images; said layers being capable of allowing passage of said offset preventing liquid therethrough to form a coating on said deformable layer for preventing offsetting of toner to said deformable layer.
Claim 2
Dependent Claim
98 words
Apparatus including a fuser member for utilization in fixing toner images to a substrate by pressure and heat comprising: a core; a thermally conductive relatively non-deformable porous layer on said core, said porous layer forming a reservoir containing offset preventing liquid; a deformable layer carried by said thermally conductive porous layer, said deformable layer comprising a material having a relatively low affinity for the toner forming said images; said layers being capable of allowing passage of said offset preventing liquid therethrough to form a coating on said deformable layer for preventing offsetting of toner to said deformable layer.
Claim 3
Dependent Claim
14 words
Apparatus according to claim 1 wherein said porous layer comprises a removable sleeve structure.
Claim 4
Dependent Claim
14 words
Apparatus according to claim 2 wherein said porous sleeve comprises a powdered metal structure.
Claim 5
Dependent Claim
13 words
Apparatus according to claim 3 wherein said deformable layer comprises cured silicone rubber.
Claim 6
Dependent Claim
13 words
Apparatus according to claim 4 wherein said offset preventing liquid comprises silicone oil.
Claim 7
Dependent Claim
27 words
Apparatus according to claim 5 including means for elevating the surface temperature of said deformable layer to provide sufficient heat for softening toner forming said toner images.
Claim 8
Dependent Claim
25 words
Apparatus according to claim 6 wherein said means for heating said deformable layer is supported internally of said core and said core is thermally conductive.
Claim 9
Dependent Claim
12 words
Apparatus according to claim 7 wherein said core comprises a rigid cylinder.
Claim 10
Dependent Claim
32 words
Apparatus according to claim 8 including a backup roll cooperating with said fuser member to form a nip therebetween through which said substrate passes with said toner images contacting said fuser member.
Claim 11
Dependent Claim
73 words
A fuser member adapted to be supported on a core member for use in fixing toner images by pressure and heat, said fuser member comprising: a thermally conductive means having an outer surface and constituting a reservoir containing offset preventing material; and a layer on said outer surface adapted to pass said offsetting preventing material therethrough to thereby form a toner barrier coating thereon, said layer having a relatively low affinity for toner.
Claim 12
Dependent Claim
73 words
A fuser member adapted to be supported on a core member for use in fixing toner images by pressure and heat, said fuser member comprising: a thermally conductive means having an outer surface and constituting a reservoir containing offset preventing material; and a layer on said outer surface adapted to pass said offsetting preventing material therethrough to thereby form a toner barrier coating thereon, said layer having a relatively low affinity for toner.
Claim 13
Dependent Claim
14 words
A fuser member according to claim 10 wherein said layer comprises cured silicone rubber.
Claim 14
Dependent Claim
15 words
A fuser member according to claim 11 wherein said offset preventing material comprises silicone oil.
Claim 15
Dependent Claim
24 words
A fuser member according to claim 10, wherein said thermally conductive means comprises a generally cylindrical sleeve adapted to be supported by said core.
Claim 16
Dependent Claim
79 words
Means adapted to be supported on a based member for handling substrates having softened toner images thereon, said means comprising A first means having an outer surface forming a reservoir containing offset prevent liquid; a second means carried by said first means and forming an integral assembly therewith, said second means being adapted to pass said offset preventing liquid therethrough to thereby form a toner barrier coating thereon, said second means having a relatively low affinity for said toner.
Claim 17
Dependent Claim
79 words
Means adapted to be supported on a based member for handling substrates having softened toner images thereon, said means comprising A first means having an outer surface forming a reservoir containing offset prevent liquid; a second means carried by said first means and forming an integral assembly therewith, said second means being adapted to pass said offset preventing liquid therethrough to thereby form a toner barrier coating thereon, said second means having a relatively low affinity for said toner.
Claim 18
Dependent Claim
24 words
The structure according to claim 14 wherein said first means comprises a generally cylindrical sleeve adapted to be removably supported on said base member.
Claim 19
Dependent Claim
15 words
The structure according to claim 15 wherein said second means comprises a silicone rubber layer.
Claim 20
Dependent Claim
14 words
The structure according to claim 16 wherein said offset preventing liquid comprises silicone oil.
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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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |