JPS5720744A - Method for dichromic electrophotography - Google Patents
Method for dichromic electrophotographyInfo
- Publication number
- JPS5720744A JPS5720744A JP9573880A JP9573880A JPS5720744A JP S5720744 A JPS5720744 A JP S5720744A JP 9573880 A JP9573880 A JP 9573880A JP 9573880 A JP9573880 A JP 9573880A JP S5720744 A JPS5720744 A JP S5720744A
- Authority
- JP
- Japan
- Prior art keywords
- tonor
- latent image
- charging
- reversely
- electrostatic latent
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G13/00—Electrographic processes using a charge pattern
- G03G13/01—Electrographic processes using a charge pattern for multicoloured copies
- G03G13/013—Electrographic processes using a charge pattern for multicoloured copies characterised by the developing step, e.g. the properties of the colour developers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Abstract
PURPOSE:To prevent the mixing of colors caused by the attachment of the 2nd tonor to a picture colored by the 1st tonor when an electrostatic latent image on a recording element is reversely developed with tonors having different colors in the 1st and 2nd developing vessels by increasing the quantity of charging of the 2nd tonor more than that of the 1st tonor. CONSTITUTION:After charging, for example, with positive electricity and irradiating the 1st ray of light 3, the 1st electrostatic latent image is formed on a recording element 1 having a light conductive element 1b on its base plate 1a to develope the latent image reversely by using positively charged black tonor 5 whose charging quantity is about 10muc/g. Then the 2nd ray of light is irradiated to form an electrostatic latent image, which is developed reversely, for example, by the positively charged red tonor 8 whose charging quantity is 15-30muc/g in the 2nd developing vessel 7. The image colored by both the red and black tonors is transferred on a recording paper 9 by a charging equipment 10. The 2nd tonor 8 is not adhered to the portion colored by the 1st tonor 5 because of large repulsion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9573880A JPS5720744A (en) | 1980-07-15 | 1980-07-15 | Method for dichromic electrophotography |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9573880A JPS5720744A (en) | 1980-07-15 | 1980-07-15 | Method for dichromic electrophotography |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5720744A true JPS5720744A (en) | 1982-02-03 |
JPS6354184B2 JPS6354184B2 (en) | 1988-10-27 |
Family
ID=14145820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9573880A Granted JPS5720744A (en) | 1980-07-15 | 1980-07-15 | Method for dichromic electrophotography |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5720744A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58159551A (en) * | 1982-03-17 | 1983-09-21 | Fujitsu Ltd | Multicolor recording device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52106743A (en) * | 1976-03-04 | 1977-09-07 | Fujitsu Ltd | High-speed multi-color printing |
JPS5538538A (en) * | 1978-09-11 | 1980-03-18 | Ricoh Co Ltd | Developing method in two color electrophotographic copying system |
JPS5557864A (en) * | 1978-10-23 | 1980-04-30 | Ricoh Co Ltd | Developing method of electrophotography |
JPS5576360A (en) * | 1978-12-05 | 1980-06-09 | Ricoh Co Ltd | Dry development system |
-
1980
- 1980-07-15 JP JP9573880A patent/JPS5720744A/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52106743A (en) * | 1976-03-04 | 1977-09-07 | Fujitsu Ltd | High-speed multi-color printing |
JPS5538538A (en) * | 1978-09-11 | 1980-03-18 | Ricoh Co Ltd | Developing method in two color electrophotographic copying system |
JPS5557864A (en) * | 1978-10-23 | 1980-04-30 | Ricoh Co Ltd | Developing method of electrophotography |
JPS5576360A (en) * | 1978-12-05 | 1980-06-09 | Ricoh Co Ltd | Dry development system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58159551A (en) * | 1982-03-17 | 1983-09-21 | Fujitsu Ltd | Multicolor recording device |
Also Published As
Publication number | Publication date |
---|---|
JPS6354184B2 (en) | 1988-10-27 |
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