US3912901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pfa teflon sleeved chow pressure roll
Assignee: Xerox Corp
•
Filing: 1974-07-15
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Granted: 1975-10-14
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Expires: 1994-07-15
Abstract
Abstract A backup roll for use in a roll fuser for fixing toner images to copy sheets by the application of heat and pressure. The roll is characterized by a rigid core covered with a relatively thick elastomeric layer with a relatively thinner sleeve or layer of a high flex life material forming an outer surface for the roll.
Inventors
- 👤 Stephen Strella
- 👤 George R Imperial
- 👤 Joseph H Moriconi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:44
CPC Classifications
F; F16; F16C; F16C13/00; G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/206
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
48 words
FUSER MEMBER FOR A ROLL FUSING APPARATUS UTILIZING IN FIXING TONER IMAGES TO SUPPORT SHEETS, SAID MEMBER COMPRISING: A RIGID CORE, A LAYER OF RESILIENT MATERIAL ADHERED TO SAID RIGID CORE, AND AN OUTER LAYER OVER SAID RESILIENT LAYER, SAID OUTER LAYER COMPRISING A COPOLYMER OF PERFLUOROALKYL PERFLUOROVINYL
Claim 2
Dependent Claim
48 words
FUSER MEMBER FOR A ROLL FUSING APPARATUS UTILIZING IN FIXING TONER IMAGES TO SUPPORT SHEETS, SAID MEMBER COMPRISING: A RIGID CORE, A LAYER OF RESILIENT MATERIAL ADHERED TO SAID RIGID CORE, AND AN OUTER LAYER OVER SAID RESILIENT LAYER, SAID OUTER LAYER COMPRISING A COPOLYMER OF PERFLUOROALKYL PERFLUOROVINYL
Claim 3
Dependent Claim
17 words
A fuser member according to claim 1 wherein n is a number from 1 to 5 inclusive.
Claim 4
Dependent Claim
90 words
Fuser apparatus for utilization in fixing toner images to copy sheets, said apparatus comprising: a heated fuser roll structure; a backup roll supported for pressure engagement with said fuser roll structure to thereby form a nip through which said copy sheets pass with said images contacting said heated fuser roll structure; said backup roll comprising: a rigid core; a layer of resilient material adhered to said rigid core; and an outer sleeve fabricated from a copolymer of perfluoroalkyl perfluorovinyl ether with tetrafluoroethylene, said ether having the formula CnF2n 1-O-CF CF2.
Claim 5
Dependent Claim
90 words
Fuser apparatus for utilization in fixing toner images to copy sheets, said apparatus comprising: a heated fuser roll structure; a backup roll supported for pressure engagement with said fuser roll structure to thereby form a nip through which said copy sheets pass with said images contacting said heated fuser roll structure; said backup roll comprising: a rigid core; a layer of resilient material adhered to said rigid core; and an outer sleeve fabricated from a copolymer of perfluoroalkyl perfluorovinyl ether with tetrafluoroethylene, said ether having the formula CnF2n 1-O-CF CF2.
Claim 6
Dependent Claim
15 words
Apparatus according to claim 3 wherein n is a number from 1 to 5 inclusive.
Claim 7
Dependent Claim
13 words
Apparatus according to claim 4 wherein said fuser roll structure is internally heated.
Claim 8
Dependent Claim
67 words
Copier apparatus including structure for forming toner images on copy sheets and structure utilized in fixing the toner images to the copy sheets wherein the latter structure comprises: a backup roll comprising: a rigid core; a layer of resilient material adhered to said rigid core; and an outer sleeve fabricated from a copolymer of perfluoroalkyl perfluorovinyl ether with tetrafluoroethylene, said ether having the formula CnF2n 1-O-CF CF2.
Claim 9
Dependent Claim
67 words
Copier apparatus including structure for forming toner images on copy sheets and structure utilized in fixing the toner images to the copy sheets wherein the latter structure comprises: a backup roll comprising: a rigid core; a layer of resilient material adhered to said rigid core; and an outer sleeve fabricated from a copolymer of perfluoroalkyl perfluorovinyl ether with tetrafluoroethylene, said ether having the formula CnF2n 1-O-CF CF2.
Claim 10
Dependent Claim
15 words
Apparatus according to claim 6 wherein n is a number from 1 to 5 inclusive.
Claim 11
Dependent Claim
40 words
Apparatus according to claim 7 including a fuser roll structure supported for pressure engagement with said backup roll to thereby form a nip through which said copy sheets are moved with said toner images contacting said heater fuser roll structure.
References Cited (Backward Citations)
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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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |