JPS642068A - Electrophotographic device - Google Patents

Electrophotographic device

Info

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
Application number
JP62158241A
Other languages
Japanese (ja)
Other versions
JPH012068A (en
JP2604751B2 (en
Inventor
Suguru Fujiki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62158241A priority Critical patent/JP2604751B2/en
Publication of JPH012068A publication Critical patent/JPH012068A/en
Publication of JPS642068A publication Critical patent/JPS642068A/en
Application granted granted Critical
Publication of JP2604751B2 publication Critical patent/JP2604751B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
JP62158241A 1987-06-25 1987-06-25 Electrophotographic equipment Expired - Fee Related JP2604751B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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