US3886416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for adjusting corotron currents
Assignee: Xerox Corp
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Filing: 1973-12-07
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Granted: 1975-05-27
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Expires: 1993-12-07
Abstract
Abstract A corona generating apparatus for charging a photoconductive surface is disclosed. In order to adjust the corona current, the corona discharge apparatus is provided with a light for illumination of the photoconductive surface when corona current is to be tested or adjusted. The lamp is energized during test to put the photoconductor into the conductive state.
Inventors
- 👤 Jr Charles F Gallo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:34
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/02; G03G15/0291
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
117 words
An apparatus for applying electrostatic charge to a photoconductive surface, including: a corona generator, including a corona electrode operatively disposed within a corona shield, to emit corona current, a photoconductive surface disposed adjacent to said corona generator to receive said corona current and thus to acquire electrostatic charge when in an insulative condition, said apparatus including means to establish a steady corona current from said corona electrode to said photoconductive surface, said means including a lamp, integral with said corona shield, said lamp being operative to illuminate said photoconductive surface to render the same conductive for the establishment of said steady corona current, and said lamp being inoperative to allow said photoconductive surface to acquire electrostatic charge.
Claim 2
Independent Claim
117 words
An apparatus for applying electrostatic charge to a photoconductive surface, including: a corona generator, including a corona electrode operatively disposed within a corona shield, to emit corona current, a photoconductive surface disposed adjacent to said corona generator to receive said corona current and thus to acquire electrostatic charge when in an insulative condition, said apparatus including means to establish a steady corona current from said corona electrode to said photoconductive surface, said means including a lamp, integral with said corona shield, said lamp being operative to illuminate said photoconductive surface to render the same conductive for the establishment of said steady corona current, and said lamp being inoperative to allow said photoconductive surface to acquire electrostatic charge.
Claim 3
Independent Claim
132 words
An apparatus for applying electrostatic charge to a photoconductive surface, including: a corona generator, including a corona electrode operatively disposed within a corona shield, to emit corona current, a photoconductive surface disposed adjacent to said corona generator to receive said corona current and thus to acquire electrostatic charge when in an insulative condition, said apparatus including means to establish a steady corona current from said corona electrode to said photoconductive surface, said means including a lamp associated with and external to said corona shield, said corona shield being transparent between said lamp and said photoconductive surface, said lamp being operative to illuminate said photoconductive surface to render the same conductive for the establishment of said steady corona current, and said lamp being inoperative to allow said photoconductive surface to acquire electrostatic charge.
Claim 4
Independent Claim
132 words
An apparatus for applying electrostatic charge to a photoconductive surface, including: a corona generator, including a corona electrode operatively disposed within a corona shield, to emit corona current, a photoconductive surface disposed adjacent to said corona generator to receive said corona current and thus to acquire electrostatic charge when in an insulative condition, said apparatus including means to establish a steady corona current from said corona electrode to said photoconductive surface, said means including a lamp associated with and external to said corona shield, said corona shield being transparent between said lamp and said photoconductive surface, said lamp being operative to illuminate said photoconductive surface to render the same conductive for the establishment of said steady corona current, and said lamp being inoperative to allow said photoconductive surface to acquire electrostatic charge.
Claim 5
Independent Claim
68 words
A method of maintaining a steady corona current between a corona generator and a photoconductive surface in a xerographic apparatus for the testing and adjustment of said corona current, including the steps of: illuminating said photoconductive surface in situ to discharge said photoconductive surface and maintain said photoconductive surface in a conductive state, operating said corona generator to establish corona current between said generator and said photoconductive surface.
Claim 6
Independent Claim
68 words
A method of maintaining a steady corona current between a corona generator and a photoconductive surface in a xerographic apparatus for the testing and adjustment of said corona current, including the steps of: illuminating said photoconductive surface in situ to discharge said photoconductive surface and maintain said photoconductive surface in a conductive state, operating said corona generator to establish corona current between said generator and said photoconductive surface.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |