JPS5587167A - Method and apparatus for electrophotography - Google Patents
Method and apparatus for electrophotographyInfo
- Publication number
- JPS5587167A JPS5587167A JP16140278A JP16140278A JPS5587167A JP S5587167 A JPS5587167 A JP S5587167A JP 16140278 A JP16140278 A JP 16140278A JP 16140278 A JP16140278 A JP 16140278A JP S5587167 A JPS5587167 A JP S5587167A
- Authority
- JP
- Japan
- Prior art keywords
- positive
- negative
- charge
- layer
- printing
- 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
Landscapes
- Electrophotography Using Other Than Carlson'S Method (AREA)
Abstract
PURPOSE: To realize positive-positive printing and negative-positive printing in one machine simultaneously, by uniformly charging the photosensitive plate, applying first image forming radiation, and applying second image forming radiation and AC destaticizing, then exposing the entire surface.
CONSTITUTION: A photosensitive plate A having photoconductive layer 2 and insulating layer 3 on a conductive supporting body 1 is, for example, negatively charged by a corona discharger 4 in dark place, and first optical image is radiated, then a positive charge 32 remains in the boundary of the layer 3 in the bright part and is unchanged in the dark part. Then, when second optical image radiation and AC destaticizing by a corona discharger 8 are applied simultaneously, negative charges 31 in parts I and II are discharged. Next, when the layer 3 is fuly exposed, the parts I, II, IV drop nearly to zero potential, while in part III, the positive charge 33 is extinguished, leaving the charge equivalent to the charged negative charge 31. Thus, positive-positive printing and negative-positive printing may be realized simultaneously in one machine.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16140278A JPS6051104B2 (en) | 1978-12-26 | 1978-12-26 | electrophotographic equipment |
| DE19792952471 DE2952471A1 (en) | 1978-12-26 | 1979-12-27 | ELECTROPHOTOGRAPHIC METHOD AND DEVICE FOR IMPLEMENTING IT |
| US06/383,098 US4486088A (en) | 1978-12-26 | 1982-05-28 | Method and apparatus for electrophotography capable of changing over images from positive to negative and vice versa |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16140278A JPS6051104B2 (en) | 1978-12-26 | 1978-12-26 | electrophotographic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5587167A true JPS5587167A (en) | 1980-07-01 |
| JPS6051104B2 JPS6051104B2 (en) | 1985-11-12 |
Family
ID=15734400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16140278A Expired JPS6051104B2 (en) | 1978-12-26 | 1978-12-26 | electrophotographic equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6051104B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55138760A (en) * | 1979-04-18 | 1980-10-29 | Fujitsu Ltd | Copying apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6425908U (en) * | 1987-08-07 | 1989-02-14 |
-
1978
- 1978-12-26 JP JP16140278A patent/JPS6051104B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55138760A (en) * | 1979-04-18 | 1980-10-29 | Fujitsu Ltd | Copying apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6051104B2 (en) | 1985-11-12 |
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