Patent US4567349A successfully refreshed from Google Patents.
US4567349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat and pressure fuser apparatus
Assignee: Xerox Corp
•
Filing: 1982-11-15
•
Granted: 1986-01-28
•
Expires: 2002-11-15
Abstract
Abstract A heat and pressure fuser apparatus for fixing toner images to a substrate. The apparatus is characterized by the fact that silicone oil release agent material which is usually required for such devices is unnecessary. The fuser member which contacts the toner images comprises an outer layer of solid abhesive material capable of retaining this property without degradation over the operating life of the apparatus. The fuser member is so constructed that the abhesive coating contributes to the formation of the nip created between the fuser member and a backup roller.
Inventors
- 👤 Arnold W. Henry
- 👤 Rabin Moser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:33
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
Heat and pressure fuser apparatus for fixing toner images to a copy substrate, said apparatus comprising: a fuser member comprising a rigid metal core overcoated only with a solid abhesive material, the material being selected from the group consisting of fluorinated polymers and copolymers; means for elevating the surface temperature of said fuser member; a backup member adapted to be pressure engaged with said fuser member to thereby form a nip between the two members, said fuser member being deformable by said backup member whereby said fuser member contributes to the formation of said nip; and means for conveying copy substrates through said nip without applying release agent material to said fuser member.
Claim 2
Dependent Claim
113 words
Heat and pressure fuser apparatus for fixing toner images to a copy substrate, said apparatus comprising: a fuser member comprising a rigid metal core overcoated only with a solid abhesive material, the material being selected from the group consisting of fluorinated polymers and copolymers; means for elevating the surface temperature of said fuser member; a backup member adapted to be pressure engaged with said fuser member to thereby form a nip between the two members, said fuser member being deformable by said backup member whereby said fuser member contributes to the formation of said nip; and means for conveying copy substrates through said nip without applying release agent material to said fuser member.
Claim 3
Dependent Claim
11 words
Apparatus according to claim 1 wherein said abhesive material comprises polytetrafluoroethylene.
Claim 4
Dependent Claim
13 words
Apparatus according to claim 1 wherein said abhesive material comprises fluorinated ethylene propylene.
Claim 5
Dependent Claim
16 words
Apparatus according to claim 1 wherein said abhesive material comprises a copolymer of perfluoroalkoxy and tetrafluoroethylene.
Claim 6
Dependent Claim
26 words
Apparatus according to claim 1 wherein said abhesive material is adhered to said rigid metal core and has a thickness on the order of 0.20 inch.
Claim 7
Dependent Claim
12 words
Apparatus according to claim 1 wherein said abhesive material comprises a terpolymer.
Claim 8
Dependent Claim
21 words
Apparatus according to claim 1 wherein said surface temperature elevating means comprises a heating element supported internally of said fuser member.
Claim 9
Dependent Claim
16 words
Apparatus according to claim 1 wherein said surface temperature elevating means comprises an external heating element.
Claim 10
Dependent Claim
11 words
Apparatus according to claim 8 further including an internal heating element.
References Cited (Backward Citations)
US947012A
Cited
US3268351A
Cited
US3449548A
Cited
US3669706A
Cited
US3811821A
Cited
US4013871A
Cited
US3884623A
Cited
US3809854A
Cited
US4001544A
Cited
US3912901A
Cited
US3948214A
Cited
UST947012I4
Cited
US4199626A
Cited
US4095886A
Cited
US4265990A
Cited
EP0002230A1
Cited
US4219327A
Cited
EP0002303A1
Cited
EP0006716A1
Cited
EP0009391A1
Cited
US4197445A
Cited
EP0018140B1
Cited
US4329565A
Cited
EP0035810A1
Cited
US4420680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |