JPS5543512A - Reversal copying method - Google Patents
Reversal copying methodInfo
- Publication number
- JPS5543512A JPS5543512A JP11512578A JP11512578A JPS5543512A JP S5543512 A JPS5543512 A JP S5543512A JP 11512578 A JP11512578 A JP 11512578A JP 11512578 A JP11512578 A JP 11512578A JP S5543512 A JPS5543512 A JP S5543512A
- Authority
- JP
- Japan
- Prior art keywords
- positive
- images
- charger
- toner
- exposure device
- 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
- 238000007599 discharging Methods 0.000 abstract 1
- 230000005684 electric field Effects 0.000 abstract 1
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Developing For Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
- Combination Of More Than One Step In Electrophotography (AREA)
Abstract
PURPOSE: To enable positive-positive images and negative-positive images to be readily obtained by applying the bias voltage of the same polarity as that of latent images to toner carrier and applying the transfer electric field of the polarity opposite from that of electrostatic latent images.
CONSTITUTION: A first charger 2 and second charger 4 and a flood exposure device 3, an exposure device 5 and a developing roll 6 are disposed to a photosensitive material 1. With the photoconductive layer using Se being, e.g., a P-type photosensitive material, a negative voltage is applied to the first charger 2. Next, it is turned conductive by a flood exposure device 3 and undergoes positive charge discharging with the second charger 4, whereby the positive-positive images are obtained. Since the charges exist internally, there is no direct contact with the conductive toner, hence the decrease in image density owing to the leakage of the latent image charges and the image disturbance at the transfer owing to reciprocating motion of the toner do not occur. To obtain negative-positive images, a bias voltage is applied to the developing roll 6 without grounding this and this causes the toner to deposit on the non-image part, thereby enabling the reversal images to be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11512578A JPS5543512A (en) | 1978-09-21 | 1978-09-21 | Reversal copying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11512578A JPS5543512A (en) | 1978-09-21 | 1978-09-21 | Reversal copying method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5543512A true JPS5543512A (en) | 1980-03-27 |
Family
ID=14654875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11512578A Pending JPS5543512A (en) | 1978-09-21 | 1978-09-21 | Reversal copying method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5543512A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5877348U (en) * | 1981-11-16 | 1983-05-25 | 日立金属株式会社 | Development device for magnetic toner |
| JPS58123571A (en) * | 1982-01-11 | 1983-07-22 | ピツトネイ・ボウズ・インコ−ポレ−テツド | Self cleaning zerograph apparatus |
| EP1099985A3 (en) * | 1999-11-10 | 2002-04-24 | Xerox Corporation | A method for applying a uniform gloss |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52146243A (en) * | 1976-05-31 | 1977-12-05 | Hitachi Ltd | Developing device for electric charge latent image |
| JPS53131842A (en) * | 1977-04-22 | 1978-11-17 | Hitachi Ltd | Reversal image forming method |
-
1978
- 1978-09-21 JP JP11512578A patent/JPS5543512A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52146243A (en) * | 1976-05-31 | 1977-12-05 | Hitachi Ltd | Developing device for electric charge latent image |
| JPS53131842A (en) * | 1977-04-22 | 1978-11-17 | Hitachi Ltd | Reversal image forming method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5877348U (en) * | 1981-11-16 | 1983-05-25 | 日立金属株式会社 | Development device for magnetic toner |
| JPS58123571A (en) * | 1982-01-11 | 1983-07-22 | ピツトネイ・ボウズ・インコ−ポレ−テツド | Self cleaning zerograph apparatus |
| EP1099985A3 (en) * | 1999-11-10 | 2002-04-24 | Xerox Corporation | A method for applying a uniform gloss |
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