JPS5622436A - Two color multisheet electrophotographic copying method - Google Patents
Two color multisheet electrophotographic copying methodInfo
- Publication number
- JPS5622436A JPS5622436A JP9823179A JP9823179A JPS5622436A JP S5622436 A JPS5622436 A JP S5622436A JP 9823179 A JP9823179 A JP 9823179A JP 9823179 A JP9823179 A JP 9823179A JP S5622436 A JPS5622436 A JP S5622436A
- Authority
- JP
- Japan
- Prior art keywords
- region
- blue light
- red
- multisheet
- layer
- 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
Landscapes
- Light Receiving Elements (AREA)
- Photoreceptors In Electrophotography (AREA)
Abstract
PURPOSE: To enable multisheet successive copying, by uniformly exposing a photoreceptor to blue light in a step subsequent to red development, and raising the surface potential of a region corresponding to black without lowering that of a region corresponding to red.
CONSTITUTION: Charging and exposure are conducted in steps 1, 2, 3, and region Pb is developed with red toner 7 in step 4, and then, the photoreceptor surface is uniformly exposed to blue light through blue filter 7 in step 5. As a result, photoconductive layer 3 has no sensitivity to blue light and transmits it, photoconductive layer 2 has sensitivity to blue light, and charge of layer 2 of black corresponding region Pa is discharged, the photoreceptor surface potential of region Pa becomes negatively high affected by all the charge potential of layer 3. On the other hand, in red corresponding region Pb, since the layer of toner 7 is present, the photoreceptor surface potential does not drop, but remains positively high, thus permitting multisheet successive copying to be effected by keeping the photoreceptor surface potential sufficiently high.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9823179A JPS5622436A (en) | 1979-07-31 | 1979-07-31 | Two color multisheet electrophotographic copying method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9823179A JPS5622436A (en) | 1979-07-31 | 1979-07-31 | Two color multisheet electrophotographic copying method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5622436A true JPS5622436A (en) | 1981-03-03 |
Family
ID=14214180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9823179A Pending JPS5622436A (en) | 1979-07-31 | 1979-07-31 | Two color multisheet electrophotographic copying method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5622436A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4594302A (en) * | 1984-05-31 | 1986-06-10 | Mita Industrial Co., Ltd. | Developing process for two-colored electrophotography |
-
1979
- 1979-07-31 JP JP9823179A patent/JPS5622436A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4594302A (en) * | 1984-05-31 | 1986-06-10 | Mita Industrial Co., Ltd. | Developing process for two-colored electrophotography |
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