JPS5564270A - Electrostatic latent image former - Google Patents
Electrostatic latent image formerInfo
- Publication number
- JPS5564270A JPS5564270A JP13762278A JP13762278A JPS5564270A JP S5564270 A JPS5564270 A JP S5564270A JP 13762278 A JP13762278 A JP 13762278A JP 13762278 A JP13762278 A JP 13762278A JP S5564270 A JPS5564270 A JP S5564270A
- Authority
- JP
- Japan
- Prior art keywords
- charging
- electrode
- photoconductor layer
- dark parts
- control electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To prevent the charging potentials of the portions corresponding to dark parts at the time of both the first and second and subsequent exposures from becoming excessive by performing controlling of the charging to be done sumultaneously with the second and subsequent exposures through provision of a control electrode in the specified position and application of voltage of the specified value.
CONSTITUTION: A corona discharging electrode 22 is provided within a grounded guard electrode 21 opposing to the photoconductor layer 2 on a drum conductor 1 and high voltage is applied. The light for the second image exposure is radiated onto the photoconductor layer 2 through the spacing between this corona discharge electrode 22. The above are the constitution of a simultaneously charging Corotron but a control electrode 23 is provided between the corona discharge electrode 22 of the simultaneously charging Corotron and the photoconductor layer 2 and if the potential of this control electrode is set slightly higher than the normal potential V0 of the dark parts, the charging potentials may be suppressed to about V0 even in the portions corresponding to the dark parts in both the first and second image exposures. Hence, the foregoing charging potentials are prevented from becoming excessive.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13762278A JPS5564270A (en) | 1978-11-08 | 1978-11-08 | Electrostatic latent image former |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13762278A JPS5564270A (en) | 1978-11-08 | 1978-11-08 | Electrostatic latent image former |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5564270A true JPS5564270A (en) | 1980-05-14 |
Family
ID=15202965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13762278A Pending JPS5564270A (en) | 1978-11-08 | 1978-11-08 | Electrostatic latent image former |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5564270A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS578551A (en) * | 1980-06-19 | 1982-01-16 | Matsushita Electric Ind Co Ltd | Image overlay method in copying machine |
JPS6057354A (en) * | 1983-06-13 | 1985-04-03 | Matsushita Electric Ind Co Ltd | Copying device |
-
1978
- 1978-11-08 JP JP13762278A patent/JPS5564270A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS578551A (en) * | 1980-06-19 | 1982-01-16 | Matsushita Electric Ind Co Ltd | Image overlay method in copying machine |
JPS6057354A (en) * | 1983-06-13 | 1985-04-03 | Matsushita Electric Ind Co Ltd | Copying device |
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