US3557367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for increasing the efficiency of corona charging of a photoconductor
Assignee: Xerox Corp
•
Filing: 1967-09-01
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Granted: 1971-01-19
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Expires: 1987-09-01
Abstract
Abstract A method and apparatus for increasing the efficiency of corona charging of a photoconductive plate are disclosed in the present application. The method comprises reducing the electromagnetic radiation received by the photoconductive plate by the use of an optical mask between the charging corona wires and the photoconductive plate. In one embodiment, the ions produced by the corona wire are directed to the photoconductive plate by the use of a combination of electrostatic ion deflection techniques and/or the use of a gas flow to carry the ions around an optical mask. In another embodiment, the efficiency of corona charging is increased by charging an intermediate insulating material such as insulating beads or an insulating belt which may then be brought into contact with an optically shielded photoconductor or other material to be charged.
Inventors
- 👤 Walter Roth
- 👤 Charles F Gallo
- 👤 Algrid G Leiga
- 👤 John A Mcinally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:11
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/02; G03G15/0291
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
12 words
A CORONA WIRE FOR PRODUCING IONS WHEN A POTENTIAL IS APPLIED THERETO;
Claim 2
Dependent Claim
12 words
A CORONA WIRE FOR PRODUCING IONS WHEN A POTENTIAL IS APPLIED THERETO;
Claim 3
Dependent Claim
9 words
MEANS FOR APPLYING A POTENTIAL TO SAID CORONA WIRE;
Claim 4
Dependent Claim
9 words
MEANS FOR APPLYING A POTENTIAL TO SAID CORONA WIRE;
Claim 5
Dependent Claim
23 words
OPTICAL MASK MEANS FOR PREVENTING THE DIRECT ILLUMINATION OF A PHOTOCONDUCTOR ADJACENT SAID CORONA WIRE FROM ELECTROMAGNETIC RADIATION PRODUCED BY SAID CORONA WIRE;
Claim 6
Dependent Claim
23 words
OPTICAL MASK MEANS FOR PREVENTING THE DIRECT ILLUMINATION OF A PHOTOCONDUCTOR ADJACENT SAID CORONA WIRE FROM ELECTROMAGNETIC RADIATION PRODUCED BY SAID CORONA WIRE;
Claim 7
Dependent Claim
11 words
MEANS FOR CHARGING AN INTERMEDIATE INSULATING MATERIAL WITH SAID IONS; AND
Claim 8
Dependent Claim
11 words
MEANS FOR CHARGING AN INTERMEDIATE INSULATING MATERIAL WITH SAID IONS; AND
Claim 9
Dependent Claim
16 words
MEANS FOR BRINGING SAID INTERMEDIATE INSULATING MATERIAL INTO CONTACT WITH SAID PHOTOCONDUCTOR, THEREBY CHARGING SAID PHOTOCONDUCTOR.
Claim 10
Dependent Claim
16 words
MEANS FOR BRINGING SAID INTERMEDIATE INSULATING MATERIAL INTO CONTACT WITH SAID PHOTOCONDUCTOR, THEREBY CHARGING SAID PHOTOCONDUCTOR.
Claim 11
Dependent Claim
18 words
shielding a photoconductor adjacent said charging wire from the electromagnetic radiation produced by said corona by optical masking;
Claim 12
Dependent Claim
18 words
shielding a photoconductor adjacent said charging wire from the electromagnetic radiation produced by said corona by optical masking;
Claim 13
Independent Claim
18 words
The method of claim l wherein said intermediate insulating material comprises a large number of small insulating beads.
Claim 14
Dependent Claim
9 words
means for applying a potential to said corona wire;
Claim 15
Dependent Claim
9 words
means for applying a potential to said corona wire;
Claim 16
Dependent Claim
23 words
optical mask means for preventing the direct illumination of a photoconductor adjacent said corona wire from electromagnetic radiation produced by said corona wire;
Claim 17
Dependent Claim
23 words
optical mask means for preventing the direct illumination of a photoconductor adjacent said corona wire from electromagnetic radiation produced by said corona wire;
Claim 18
Independent Claim
14 words
The method of claim l wherein said intermediate insulating material comprises an insulating belt.
Claim 19
Dependent Claim
14 words
charging an intermediate insulating material with ions produced by said corona charging wire; and
Claim 20
Dependent Claim
14 words
charging an intermediate insulating material with ions produced by said corona charging wire; and
Claim 21
Dependent Claim
14 words
bringing said intermediate insulating material into contact with said photoconductor, thereby charging said photoconductor.
Claim 22
Dependent Claim
14 words
bringing said intermediate insulating material into contact with said photoconductor, thereby charging said photoconductor.
Claim 23
Dependent Claim
5 words
A corona charging device comprising:
Claim 24
Dependent Claim
5 words
A corona charging device comprising:
Claim 25
Dependent Claim
11 words
means for charging an intermediate insulating material with said ions; and
Claim 26
Dependent Claim
11 words
means for charging an intermediate insulating material with said ions; and
Claim 27
Dependent Claim
16 words
means for bringing said intermediate insulating material into contact with said photoconductor, thereby charging said photoconductor.
Claim 28
Dependent Claim
16 words
means for bringing said intermediate insulating material into contact with said photoconductor, thereby charging said photoconductor.
Claim 29
Dependent Claim
18 words
The apparatus of claim 4 wherein said intermediate insulating material comprises a large number of small insulating beads.
Claim 30
Dependent Claim
14 words
The apparatus of claim 4 wherein said intermediate insulating material comprises an insulating belt.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |