US3918403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corona transfer mechanism
Assignee: Xerox Corp
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Filing: 1973-11-23
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Granted: 1975-11-11
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Expires: 1993-11-23
Abstract
Abstract An electrostatic reproduction machine has an improved transfer mechanism for effecting transfer of a developed image from a photoconductive surface of the machine to a sheet of paper, the mechanism having a plurality of point discharge needles disposed adjacent the photoconductive surface, and a plurality of rotatably mounted rollers located among the needles and which are in contact with the paper during transfer so as to maintain contact between the latter and photoconductive surface.
Inventors
- 👤 Richard C Vock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:41
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; G03G15/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
86 words
An improved apparatus for effecting transfer of a developed electrostatic image from a first support member to a second support member, the apparatus comprising a plurality of spaced point discharge needles disposed adjacent to the first support member, and a plurality of rollers disposed among the needles, the rollers being mounted in contact with the first support member and mounted for rotation around a common axis whereby the rollers keep the first support member and the second support member in contact with each other during transfer.
Claim 2
Dependent Claim
86 words
An improved apparatus for effecting transfer of a developed electrostatic image from a first support member to a second support member, the apparatus comprising a plurality of spaced point discharge needles disposed adjacent to the first support member, and a plurality of rollers disposed among the needles, the rollers being mounted in contact with the first support member and mounted for rotation around a common axis whereby the rollers keep the first support member and the second support member in contact with each other during transfer.
Claim 3
Dependent Claim
25 words
An improved apparatus as set forth in claim 1, wherein each of said rollers comprises a metallic hub and a rubber wheel surrounding said hub.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |