US3856462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reproduction machine fuser
Assignee: Xerox Corp
•
Filing: 1973-10-18
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Granted: 1974-12-24
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Expires: 1993-10-18
Abstract
Abstract A fuser apparatus for a reproduction or copying machine, the fuser comprising a heated fixing roll and cooperating pressure roll which together form a nip between which the copy material being fused passes. One or more stripper fingers at the fuser exit cooperate with the fuser rolls to prevent the copy material from sticking thereto. To obviate uneven or spot wear on the fuser roll surface, which may result from contact of some operative element, such as the stripper fingers, or a temperature sensor, or from the copy material itself thereagainst, the fuser roll is supported for limited axial displacement relative to the pressure roll. Such fuser roll support is obtained through a movable roll bearing structure, which includes a bearing lock to retain the bearing structure and the fuser roll itself in a selected axial position.
Inventors
- 👤 K Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:49
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
105 words
In a reproduction machine for producing copies of documents, said machine having a fuser for fixing the copy images developed, said fuser having cooperating pressure and heated fusing rolls forming therebetween a nip through which copies to be fused pass, the improvement comprising means supporting said fusing roll for a shift in an axial direction relative to said pressure roll from one relatively permanent operating position to a second relatively permanent operating position whereby to permit the surface of said fusing roll to be displaced to a new position relative to said pressure roll to offset uneven wear on the surface of said fusing roll.
Claim 2
Dependent Claim
105 words
In a reproduction machine for producing copies of documents, said machine having a fuser for fixing the copy images developed, said fuser having cooperating pressure and heated fusing rolls forming therebetween a nip through which copies to be fused pass, the improvement comprising means supporting said fusing roll for a shift in an axial direction relative to said pressure roll from one relatively permanent operating position to a second relatively permanent operating position whereby to permit the surface of said fusing roll to be displaced to a new position relative to said pressure roll to offset uneven wear on the surface of said fusing roll.
Claim 3
Dependent Claim
58 words
The reproduction machine according to claim 1 including at least one relatively thin finger-like element adapted to contaCt the periphery of said fusing roll at one point thereof to strip copy material therefrom, shifting of said fusing roll to said second relatively permanent operating position serving to present fresh fusing roll surface for contact by said finger-like element.
Claim 4
Dependent Claim
25 words
The reproduction machine according to claim 1 in which said support means includes locking means for retaining said fusing roll in a selected operating position.
Claim 5
Dependent Claim
156 words
In an electrostatic type copying machine having a photoconductive member, means to charge the member in preparation for imaging, means to expose the member to form a latent electrostatic image of the original being coped thereon, means to develop the image, means to transfer the developed image to copy material, means for permanently fixing the transferred image on the copy material including a fuser roll having an offset inhibiting coating on the surface thereof, and feeding means to feed the copy material along a predetermined path into operative relationship with the transfer means whereat the developed image is transferred to the copy material and thereafter to the fixing means whereat the image is permanently fixed, the improvement comprising: means supporting said fuser roll for manual shifting movement along the roll axis relative to said copy material predetermined path whereby to enable the wear effects of said copy material against said fuser roll coating to be offset.
Claim 6
Dependent Claim
156 words
In an electrostatic type copying machine having a photoconductive member, means to charge the member in preparation for imaging, means to expose the member to form a latent electrostatic image of the original being coped thereon, means to develop the image, means to transfer the developed image to copy material, means for permanently fixing the transferred image on the copy material including a fuser roll having an offset inhibiting coating on the surface thereof, and feeding means to feed the copy material along a predetermined path into operative relationship with the transfer means whereat the developed image is transferred to the copy material and thereafter to the fixing means whereat the image is permanently fixed, the improvement comprising: means supporting said fuser roll for manual shifting movement along the roll axis relative to said copy material predetermined path whereby to enable the wear effects of said copy material against said fuser roll coating to be offset.
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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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |