US4571059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for transferring images of conductive toner powder
Assignee: 3M Co
•
Filing: 1983-10-17
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Granted: 1986-02-18
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Expires: 2003-10-17
Abstract
Abstract Apparatus for transferring images of conductive toner powder from a layer carried by a rotatable, electrically conductive member to a dielectric material carried by a rotatable, electrically conductive, cylindrical member. A d.c. voltage supply is connected between the two conductive members and the two members are positioned so the layer on the one and the dielectric material on the other are separated by a slight air space.
Inventors
- 👤 Charles P. Huss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:47
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1605
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
160 words
Toner powder image transfer apparatus for transferring images of electronically conductive toner powder from the surface of a layer carried on the outer surface of a first movable, electrically conductive, cylindrical member including: a second movable, electrically conductive, cylindrical member having a dielectric material at its outer surface for receiving the transferred toner image, said second member positioned from the first member to provide an air space that is at least as great as the extreme dimension of the largest toner powder particles with the first member positioned so the layer carried by the first member is parallel to said outer surface of said second member at said air space, and means for applying a d.c. voltage continuously between said first member and said second member for transferring toner powder from the first member at said air space to said dielectric material at the outer surface of said second member during movement of the first member and said second member.
Claim 2
Dependent Claim
160 words
Toner powder image transfer apparatus for transferring images of electronically conductive toner powder from the surface of a layer carried on the outer surface of a first movable, electrically conductive, cylindrical member including: a second movable, electrically conductive, cylindrical member having a dielectric material at its outer surface for receiving the transferred toner image, said second member positioned from the first member to provide an air space that is at least as great as the extreme dimension of the largest toner powder particles with the first member positioned so the layer carried by the first member is parallel to said outer surface of said second member at said air space, and means for applying a d.c. voltage continuously between said first member and said second member for transferring toner powder from the first member at said air space to said dielectric material at the outer surface of said second member during movement of the first member and said second member.
Claim 3
Dependent Claim
18 words
A toner powder image transfer apparatus according to claim 1 wherein said second member is a heated member.
References Cited (Backward Citations)
US3932035A
Cited
US4175265A
Cited
US4187774A
Cited
US4207101A
Cited
US4348098A
Cited
US4338017A
Cited
US4373016A
Cited
US4401383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-17 | 1989-08-19 | 1990-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-17 | 1993-08-19 | 1994-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-17 | 1997-08-19 | 1998-02-18 | $7700.00 | Window Closed / Lapsed |