JPS5640852A - Electrophotographic device - Google Patents

Electrophotographic device

Info

Publication number
JPS5640852A
JPS5640852A JP11749879A JP11749879A JPS5640852A JP S5640852 A JPS5640852 A JP S5640852A JP 11749879 A JP11749879 A JP 11749879A JP 11749879 A JP11749879 A JP 11749879A JP S5640852 A JPS5640852 A JP S5640852A
Authority
JP
Japan
Prior art keywords
speed
pressure
drum
photoreceptor
supporting component
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
Application number
JP11749879A
Other languages
Japanese (ja)
Inventor
Tsutomu Toyono
Masaki Nakaoka
Kyo Tanaka
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP11749879A priority Critical patent/JPS5640852A/en
Publication of JPS5640852A publication Critical patent/JPS5640852A/en
Pending legal-status Critical Current

Links

Landscapes

  • Fixing For Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To prevent the deterioration of the photoreceptor, by detecting whether the rotational speed of the pressure fixing roller which gives the pressure to the toner image supporting component is slower than the fixed speed or zero. CONSTITUTION:The pressure fixing roller pairs 8 and 9 are provided, and furthermore this roller pair and the photosensitive drum 1 are driven by the same motor 2. And the detecting means consisting of the light source 13 and the photodetector 14 detects whether the roller pairs 8 and 9 which give the pressure to the toner supporting component have the rolational speed higher than the fixed speed or the zero speed. Then based on the detection signal, the corona discharge given from the corona discharger 6 to be supplied to the drum 1 is stopped by the command to be given to the high-voltage generating device 7 via the counter 15 and the comparator 17. As a result, the surface potential of the drum 1 can be prevented from becoming extraordinarily high or low or affecting negatively the photoreceptor.
JP11749879A 1979-09-12 1979-09-12 Electrophotographic device Pending JPS5640852A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11749879A JPS5640852A (en) 1979-09-12 1979-09-12 Electrophotographic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11749879A JPS5640852A (en) 1979-09-12 1979-09-12 Electrophotographic device

Publications (1)

Publication Number Publication Date
JPS5640852A true JPS5640852A (en) 1981-04-17

Family

ID=14713217

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11749879A Pending JPS5640852A (en) 1979-09-12 1979-09-12 Electrophotographic device

Country Status (1)

Country Link
JP (1) JPS5640852A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6255590A (en) * 1985-08-30 1987-03-11 サントル・スイス・デレクトロニク・エ・ド・ミクロテクニク・ソシエテ・アノニム Precision positioning device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6255590A (en) * 1985-08-30 1987-03-11 サントル・スイス・デレクトロニク・エ・ド・ミクロテクニク・ソシエテ・アノニム Precision positioning device

Similar Documents

Publication Publication Date Title
JPS5451846A (en) Electrostatic latent image developing device
GB1437991A (en) Electrophotographic device
GB1454963A (en) Method of developing an electrostatic latent image and an apparat us for use therein
EP0531161B1 (en) Electrostatic voltmeter (ESV) zero offset adjustment
JPS5640852A (en) Electrophotographic device
JPS5677858A (en) Corona discharger
JPS5393835A (en) Copy picture quality controller of electrostatic copying machine
US3650619A (en) Switching detector
JPS5654473A (en) Electrophotographic copier
US3650617A (en) Switching detector
JPS54107739A (en) Electrophotographic apparatus
JPS5565964A (en) Transfer method of copying machine
KR920001257A (en) Photosensitive drum power supply method in electrophotographic equipment
JPS57104159A (en) Toner density detecting method
JPS5722275A (en) Electrophotographic device
JPS53110832A (en) Developing process for electrophotographic copier
JPS5322420A (en) Cleaner for pin electrode of electrostatic r ecording device
JPS5624382A (en) Copying machine
KR920007309B1 (en) Transcription dividing apparatus for electro-graphy processor
JPS5377635A (en) Cleaning mechanism
JPS5577766A (en) Developing capacity detector in electrophotographic copier
JPS5664365A (en) Developing device
JPS5529881A (en) Latent image potential correcting method
JPS561074A (en) Flash fixing device of electrophotographic copier
JPS5584961A (en) Developing device for magnetic toner

Legal Events

Date Code Title Description
A521 Written amendment

Effective date: 20050303

Free format text: JAPANESE INTERMEDIATE CODE: A523

A621 Written request for application examination

Effective date: 20050303

Free format text: JAPANESE INTERMEDIATE CODE: A621

A131 Notification of reasons for refusal

Effective date: 20080226

Free format text: JAPANESE INTERMEDIATE CODE: A131

A72 Notification of change in name of applicant

Effective date: 20080312

Free format text: JAPANESE INTERMEDIATE CODE: A721

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20080312

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20080325

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080523

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080708

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080806

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 3

Free format text: PAYMENT UNTIL: 20110815

R150 Certificate of patent (=grant) or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees