JPS5654452A - Image processing method - Google Patents
Image processing methodInfo
- Publication number
- JPS5654452A JPS5654452A JP13026779A JP13026779A JPS5654452A JP S5654452 A JPS5654452 A JP S5654452A JP 13026779 A JP13026779 A JP 13026779A JP 13026779 A JP13026779 A JP 13026779A JP S5654452 A JPS5654452 A JP S5654452A
- Authority
- JP
- Japan
- Prior art keywords
- polarity
- grating
- photoreceptor
- discharger
- image
- 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
- 238000003672 processing method Methods 0.000 title 1
- 108091008695 photoreceptors Proteins 0.000 abstract 3
- 230000005684 electric field Effects 0.000 abstract 2
- 150000002500 ions Chemical class 0.000 abstract 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
Landscapes
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE: To enable only image areas of density up to an optional intermediate density to be reproduced, by applying bias voltage to a controlling grating, and transferring an image with a transferring device reverse in polarity to charge of a latent image.
CONSTITUTION: Discharge electrode 4 of corona discharger 3 preceding transfer shielded with discharger shield 5 is connected to high voltage source 8 reverse in polarity to toner. Controlling grating 6 with tungsten wires stretched e.g., at intervals of 0.5W2mm is provided in the shield opening on the side of photoreceptor 1. A voltage between the potential of the light area of a photosensitive plate and that of the dark area is applied to grating 6 from bias voltage source 7. An electric field for accelerating corona ions and an electric field for restricting corona ions are formed between the surface potential of photoreceptor 1 and grating 6 using discharger 3 in such a structure, in order to convert the polarity of part of the toner on photoreceptor 1 into the reverse polarity and to reproduce part of the image selectively.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13026779A JPS5654452A (en) | 1979-10-09 | 1979-10-09 | Image processing method |
| US06/191,030 US4402591A (en) | 1979-09-29 | 1980-09-26 | Electrophotographic apparatus |
| DE19803036731 DE3036731A1 (en) | 1979-09-29 | 1980-09-29 | ELECTROPHOTOGRAPHIC DEVICE |
| GB8031336A GB2062548B (en) | 1979-09-29 | 1980-09-29 | Electrophotographic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13026779A JPS5654452A (en) | 1979-10-09 | 1979-10-09 | Image processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5654452A true JPS5654452A (en) | 1981-05-14 |
Family
ID=15030190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13026779A Pending JPS5654452A (en) | 1979-09-29 | 1979-10-09 | Image processing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5654452A (en) |
-
1979
- 1979-10-09 JP JP13026779A patent/JPS5654452A/en active Pending
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