JPS5574559A - Color reversible 2-color electrophotographic copying method - Google Patents
Color reversible 2-color electrophotographic copying methodInfo
- Publication number
- JPS5574559A JPS5574559A JP14831678A JP14831678A JPS5574559A JP S5574559 A JPS5574559 A JP S5574559A JP 14831678 A JP14831678 A JP 14831678A JP 14831678 A JP14831678 A JP 14831678A JP S5574559 A JPS5574559 A JP S5574559A
- Authority
- JP
- Japan
- Prior art keywords
- color
- photoconductive layer
- charging
- insensitive
- sensitive
- 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.)
- Granted
Links
Abstract
PURPOSE: To make possible the color reversion of the 2-color electrophotographic copying method by combining a both polarity photoconductive layer sensitive to A color and insensitive to B color and a photoconductive layer having the characteristics opposite thereof and charging these by the specific method.
CONSTITUTION: The photoreceptor 1 comprising forming a photoconductive layer 11 (sensitive to B color and insensitive to A color) and a photoconductive layer 12 (sensitive to A color and insensitive to B color) on a conductive substrate 1 is used. In case color reversion is not goin to be performed, the photoreceptor 1 is primary-charged to positive polarity while being radiated with A-color light, thence it is subjected to the secondary charging of negative polarity weaker than the primary charging in the dark to form the polarizations of mutually opposite directions on each of the photoconductive layers 11, 12, after which the light images of the original C having A- color image OA and B-color image OB on the white ground are radiated to make the surface of the photoreceptor corresponding to the white ground part, A-color image and B-color image respectively zero potential, positive polarity and negative polarity, thence the images are developed by the negatively charged A-color toner and positively charged B-color toner. In the case of performing color reversion, the polarities of the abovementioned primary charging and secondary charging are reversed and the similar operations are done.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14831678A JPS5574559A (en) | 1978-11-30 | 1978-11-30 | Color reversible 2-color electrophotographic copying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14831678A JPS5574559A (en) | 1978-11-30 | 1978-11-30 | Color reversible 2-color electrophotographic copying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5574559A true JPS5574559A (en) | 1980-06-05 |
| JPS6330625B2 JPS6330625B2 (en) | 1988-06-20 |
Family
ID=15450056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14831678A Granted JPS5574559A (en) | 1978-11-30 | 1978-11-30 | Color reversible 2-color electrophotographic copying method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5574559A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54141129A (en) * | 1978-04-25 | 1979-11-02 | Ricoh Co Ltd | Two-color electrophotographic copying method |
-
1978
- 1978-11-30 JP JP14831678A patent/JPS5574559A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54141129A (en) * | 1978-04-25 | 1979-11-02 | Ricoh Co Ltd | Two-color electrophotographic copying method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6330625B2 (en) | 1988-06-20 |
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