JPS55140852A - Controller of electrophotographic copying machine - Google Patents
Controller of electrophotographic copying machineInfo
- Publication number
- JPS55140852A JPS55140852A JP4877179A JP4877179A JPS55140852A JP S55140852 A JPS55140852 A JP S55140852A JP 4877179 A JP4877179 A JP 4877179A JP 4877179 A JP4877179 A JP 4877179A JP S55140852 A JPS55140852 A JP S55140852A
- Authority
- JP
- Japan
- Prior art keywords
- detector
- controller
- defect
- copying machine
- latent 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.)
- Granted
Links
Landscapes
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE:To extend an available photoreceptor life expressed as copy number and to enhance operation ratio of a copying machine, by using the photoreceptor surface for formation of a latent image avoiding its defective part when a defect occurs on the photoreceptor surface. CONSTITUTION:Defective position indicator 11 capable of indicating the position of defect 5 on surface 2 of photosensitive drum 1 of a copying machine when it occurs, and indicating plate detector 12 for detecting indication of plate 11 are installed. The relative position signal on drum 1 of defect 5 detected with plate 11 and detector 12 is sent to controller 15. Further, slit disc 13 and slit detector 14 as shown in the figure are also installed as a detector for detecting the rotary angle of drum 1, and the signal detected with detector 14 is fed to controller 15. In controller 15 device 16 for forming a latent image is controlled so as to enable the latent image to be formed on the position avoiding defect 5 by the above 2 signals.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4877179A JPS55140852A (en) | 1979-04-20 | 1979-04-20 | Controller of electrophotographic copying machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4877179A JPS55140852A (en) | 1979-04-20 | 1979-04-20 | Controller of electrophotographic copying machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55140852A true JPS55140852A (en) | 1980-11-04 |
JPS5758654B2 JPS5758654B2 (en) | 1982-12-10 |
Family
ID=12812533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4877179A Granted JPS55140852A (en) | 1979-04-20 | 1979-04-20 | Controller of electrophotographic copying machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55140852A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63212958A (en) * | 1987-02-28 | 1988-09-05 | Ricoh Co Ltd | Copying controller |
-
1979
- 1979-04-20 JP JP4877179A patent/JPS55140852A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63212958A (en) * | 1987-02-28 | 1988-09-05 | Ricoh Co Ltd | Copying controller |
Also Published As
Publication number | Publication date |
---|---|
JPS5758654B2 (en) | 1982-12-10 |
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