US3743830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for uniformly charging a non-planar electrophotographic plate
Assignee: Xerox Corp
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Filing: 1970-02-09
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Granted: 1973-07-03
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Expires: 1990-02-09
Abstract
Abstract Apparatus for uniformly charging the curved surface of an insulating member. In a first embodiment, a single corona discharge electrode is mechanically coupled to a follower member which is maintained in contact with the non-charging surface of the insulating member. The distance between the follower member and the discharge electrode is maintained at a constant value as the member moves relative to the discharge electrode, the charge being deposited uniformly over the charging surface of the insulating member. In a second embodiment, the follower member and discharge electrode are arranged to uniformly deposit charge on a selected portion of the insulating member.
Inventors
- 👤 I Takahashi
- 👤 M Sato
- 👤 S Honjo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:14
CPC Classifications
H; H01; H01T; H01T19/00; G; G03; G03G; G03G15/00; G03G15/02; G03G15/0291
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
Apparatus for uniformly charging a surface of a non-planar member having a substantially uniform thickness as said nonplanar member is moved in a predetermined direction, the apparatus comprising: a corona discharge electrode disposed adjacent said surface at one side of said non-planar member, a follower member maintained in contact with the opposite side of said non-planar member as said non-planar member moves along, means for rigidly coupling said follower member to said corona discharge electrode to maintain them in alignment in a plane transverse to the direction of movement of said non-planar member and to maintain a constant spacing between said discharge electrode and said surface, and a potential source for applying an electrical potential to said corona discharge electrode, whereby a substantially uniform charge is formed on said surface.
Claim 2
Dependent Claim
130 words
Apparatus for uniformly charging a surface of a non-planar member having a substantially uniform thickness as said nonplanar member is moved in a predetermined direction, the apparatus comprising: a corona discharge electrode disposed adjacent said surface at one side of said non-planar member, a follower member maintained in contact with the opposite side of said non-planar member as said non-planar member moves along, means for rigidly coupling said follower member to said corona discharge electrode to maintain them in alignment in a plane transverse to the direction of movement of said non-planar member and to maintain a constant spacing between said discharge electrode and said surface, and a potential source for applying an electrical potential to said corona discharge electrode, whereby a substantially uniform charge is formed on said surface.
Claim 3
Dependent Claim
43 words
The apparatus as set forth in claim 1, wherein said non-planar member comprises a conductive substrate and a photoconductive insulating layer overlying said conductive substrate to define said surface, and said follower member underlies and is maintained in contact with said conductive substrate.
Claim 4
Dependent Claim
60 words
The apparatus as set forth in claim 1, wherein said non-planar member has a corrugation-like deformity occurring along the direction of movement of said non-planar member, and said discharge electrode comprises a corona wire disposed transverse to the direction of movement of said non-planar member, said wire having a length at least equal to the width of said planar member.
Claim 5
Dependent Claim
37 words
The apparatus as set forth in claim 3, wherein said non-planar member has a predetermined minimum radius of curvature, and said follower member comprises an elongated roller having a radius which is less than said minimum radius.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |