Patent US3842800A successfully refreshed from Google Patents.
US3842800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer roller assembly
Assignee: Xerox Corp
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Filing: 1971-12-30
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Granted: 1974-10-22
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Expires: 1991-12-30
Abstract
Abstract A transfer roller assembly including a transfer roller for an electrostatographic machine. The transfer roller assembly is rotated about a support shaft in response to spring tension to place the transfer roller in pressure contact with the photoconductive surface during the image transfer mode therefore. The transfer roller assembly is rotated in the opposite direction by removal of such spring tension for diverse reasons, for example to facilitate replacement of the photoconduct member.
Inventors
- 👤 D Hoffman
- 👤 T Meagher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:03
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1665; G03G15/167
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
207 words
An improved electrostatographic machine having a photoconductive member, the improvement comprising: a transfer roller assembly mounted for rotation within said machine, said assembly including end members each having groove means formed therein, a transfer roller rotatably mounted to said end members, a mounting shaft parallel to said transfer roller and rotatably mounted to said end members, bearing means for mounting said mounting shaft within said machine, said assembly being adapted to rotate about the axis of said mounting shaft, said transfer roller being disposed adjacent said photoconductive member, means for placing said transfer roller in pressure contact with said photoconductive surface, said placing means including a locking shaft rotatably mounted parallel to said transfer roller, a handle connected to said locking shaft for rotating the same, an arm mounted on each side of said handle, each of said arms being mounted to rotate with respect to said locking shaft and having means for engaging one of said groove means, and a spring mounted on each side of said handle, each of said springs being disposed around said locking shaft and having one end fixed so as to rotate with said locking shaft when the latter rotates while the other end is affixed to one of said arms.
Claim 2
Dependent Claim
207 words
An improved electrostatographic machine having a photoconductive member, the improvement comprising: a transfer roller assembly mounted for rotation within said machine, said assembly including end members each having groove means formed therein, a transfer roller rotatably mounted to said end members, a mounting shaft parallel to said transfer roller and rotatably mounted to said end members, bearing means for mounting said mounting shaft within said machine, said assembly being adapted to rotate about the axis of said mounting shaft, said transfer roller being disposed adjacent said photoconductive member, means for placing said transfer roller in pressure contact with said photoconductive surface, said placing means including a locking shaft rotatably mounted parallel to said transfer roller, a handle connected to said locking shaft for rotating the same, an arm mounted on each side of said handle, each of said arms being mounted to rotate with respect to said locking shaft and having means for engaging one of said groove means, and a spring mounted on each side of said handle, each of said springs being disposed around said locking shaft and having one end fixed so as to rotate with said locking shaft when the latter rotates while the other end is affixed to one of said arms.
Claim 3
Dependent Claim
57 words
An improved electrostatographic machine according to claim 1, and further including a locking plate having a generally U-shaped opening, and wherein said handle is positioned within said opening, and wherein one leg of said opening is adapted to engage said handle in locking attitude for maintaining the pressure contact between said photoconductive member and said transfer roller.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |