JPS5753757A - Copying method of emphasizing specific picture information part - Google Patents
Copying method of emphasizing specific picture information partInfo
- Publication number
- JPS5753757A JPS5753757A JP55128088A JP12808880A JPS5753757A JP S5753757 A JPS5753757 A JP S5753757A JP 55128088 A JP55128088 A JP 55128088A JP 12808880 A JP12808880 A JP 12808880A JP S5753757 A JPS5753757 A JP S5753757A
- Authority
- JP
- Japan
- Prior art keywords
- charging
- photoconductive layer
- photoreceptor
- polarity
- picture
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
- G03G15/045—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for charging or discharging distinct portions of the charge pattern on the recording material, e.g. for contrast enhancement or discharging non-image areas
Abstract
PURPOSE:To emphasize a specific picture part by providing the 2nd photoconductive layer on the 1st photoconductive layer on a conductive base directly or with an intermediate layer inbetween, and by forming electrostatic latent images with the opposite polarity by charging and exposing in an opposite direction each other and performing prescribed development in color copying process. CONSTITUTION:A photoreceptor 1 is formed by laminating the 2nd photoconductive layer 1C on the 1st photoconductive layer 1B on a conductive base 1A. The primary charging is performed by irradiating the photoreceptor with red light LR uniformly, and in darkness, the secondary charging is performed with the opposite polarity to the primary charging by a charger 3 for neutralization, thereby charging the photoconductive layers 1B and 1C in the opposite direction as shown by (II). In a stage (III), an original O image is projected on the photoreceptor 1 by an optical imaging system 4 for picture exposure as shown by (IV), and development is carried out with negative-polarity black toner TB to obtain a normal electrostatic latent image part LIB as shown by (V) and to visualize a negative-polarity latent image part LIR as an edge effect picture. Then, transfer (VI) and fixation (VII) are performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55128088A JPS5753757A (en) | 1980-09-16 | 1980-09-16 | Copying method of emphasizing specific picture information part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55128088A JPS5753757A (en) | 1980-09-16 | 1980-09-16 | Copying method of emphasizing specific picture information part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5753757A true JPS5753757A (en) | 1982-03-30 |
Family
ID=14976100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55128088A Pending JPS5753757A (en) | 1980-09-16 | 1980-09-16 | Copying method of emphasizing specific picture information part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5753757A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61117572A (en) * | 1984-11-13 | 1986-06-04 | Canon Inc | Electrophotographic device |
-
1980
- 1980-09-16 JP JP55128088A patent/JPS5753757A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61117572A (en) * | 1984-11-13 | 1986-06-04 | Canon Inc | Electrophotographic device |
| JPH0574823B2 (en) * | 1984-11-13 | 1993-10-19 | Canon Kk |
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