JPS642068A - Electrophotographic device - Google Patents
Electrophotographic deviceInfo
- Publication number
- JPS642068A JPS642068A JP62158241A JP15824187A JPS642068A JP S642068 A JPS642068 A JP S642068A JP 62158241 A JP62158241 A JP 62158241A JP 15824187 A JP15824187 A JP 15824187A JP S642068 A JPS642068 A JP S642068A
- Authority
- JP
- Japan
- Prior art keywords
- relay
- impressed
- turns
- electrifier
- turned
- 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
- Developing For Electrophotography (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE: To prevent a developing bias voltage from impressed on a photosensitive drum before impressing a voltage for electrification even if a fault occurs by making the output voltage from a power source for electrification transmitted to a developing bias impressing means by means of a delay switching device.
CONSTITUTION: When a switch S3 is turned on, gate circuits G1 and G4 are opened and G2 and G3 are closed. Then, a relay 3 directly turns on and a relay 5 turns on after a time set in a delay circuit T2 passes. Next, when the switch S3 is switched off, the circuits G1 and G4 are closed and the G2 and G3 are opened. And the relay 3 turns off after the time set in the delay circuit T1 and the relay 5 directly turns off. Namely, if the switch S3 is turned on after turning off, a high voltage is impressed on an electrifier 9 for developing bias, prescribed time after the high voltage is impressed on an electrifier 8. Even if the relay 5 turns on as soon as the switch S3 is turned off since the fault occurs in an action sequence control circuit 6, the high voltage is not impressed on the electrifier 9 if the high voltage is not impressed on the electrifier 8 since the relay 3 is turned on.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62158241A JP2604751B2 (en) | 1987-06-25 | 1987-06-25 | Electrophotographic equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62158241A JP2604751B2 (en) | 1987-06-25 | 1987-06-25 | Electrophotographic equipment |
Publications (3)
Publication Number | Publication Date |
---|---|
JPH012068A JPH012068A (en) | 1989-01-06 |
JPS642068A true JPS642068A (en) | 1989-01-06 |
JP2604751B2 JP2604751B2 (en) | 1997-04-30 |
Family
ID=15667348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62158241A Expired - Fee Related JP2604751B2 (en) | 1987-06-25 | 1987-06-25 | Electrophotographic equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2604751B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6078461A (en) * | 1983-10-05 | 1985-05-04 | Minolta Camera Co Ltd | Control device for copying system |
-
1987
- 1987-06-25 JP JP62158241A patent/JP2604751B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6078461A (en) * | 1983-10-05 | 1985-05-04 | Minolta Camera Co Ltd | Control device for copying system |
Also Published As
Publication number | Publication date |
---|---|
JP2604751B2 (en) | 1997-04-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |