JPS54141644A - Toner recovery system of electrophotographic copier - Google Patents
Toner recovery system of electrophotographic copierInfo
- Publication number
- JPS54141644A JPS54141644A JP4921278A JP4921278A JPS54141644A JP S54141644 A JPS54141644 A JP S54141644A JP 4921278 A JP4921278 A JP 4921278A JP 4921278 A JP4921278 A JP 4921278A JP S54141644 A JPS54141644 A JP S54141644A
- Authority
- JP
- Japan
- Prior art keywords
- charging
- rotation
- black developing
- magnetic brush
- monochrome
- 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
Abstract
PURPOSE: To achieve the stabilization of the picture quality of monochromatic or 2 color images by removing the residual toner with a magnetic brush in the second rotation of a photosensitive drum in monochrome copying with a two color electrophotographic copier having a magnetic brush type black developing means.
CONSTITUTION: In performing two color copying, the charging, exposing, black developing, red developing, charging before transfer, transferring and destaticizing are accomplished in one rotation of a drum 1. The toners mixed with two colors are scraped off with a cleaning device 16 and are stored in a containing chamber 19. Next, in performing monochrome copying, the charging, exposing, black developing, tranferring and destaticizing are accomplished in the first rotation of the drum. At this time, the red developing, second charging and charging before the transfer which do not contribute to the monochrome copying are disabled and the cleaning device 16 is also stopped. Hence, the photosensitive drum 1 is removed of the residual toner by the magnetic brush 9 of the black developing device 8 in the second rotation, after which the next operation is started. In this way, the monochrome or two color images may be maintained at high quality without adding any device.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4921278A JPS54141644A (en) | 1978-04-27 | 1978-04-27 | Toner recovery system of electrophotographic copier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4921278A JPS54141644A (en) | 1978-04-27 | 1978-04-27 | Toner recovery system of electrophotographic copier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54141644A true JPS54141644A (en) | 1979-11-05 |
Family
ID=12824661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4921278A Pending JPS54141644A (en) | 1978-04-27 | 1978-04-27 | Toner recovery system of electrophotographic copier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54141644A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56159666A (en) * | 1980-05-13 | 1981-12-09 | Ricoh Co Ltd | Electrophotographic color copier |
| JPH03110580A (en) * | 1989-09-26 | 1991-05-10 | Matsushita Electric Ind Co Ltd | Cleaning method and toner used therefor |
-
1978
- 1978-04-27 JP JP4921278A patent/JPS54141644A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56159666A (en) * | 1980-05-13 | 1981-12-09 | Ricoh Co Ltd | Electrophotographic color copier |
| JPH03110580A (en) * | 1989-09-26 | 1991-05-10 | Matsushita Electric Ind Co Ltd | Cleaning method and toner used therefor |
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