JPS5633661A - Copying machine - Google Patents

Copying machine

Info

Publication number
JPS5633661A
JPS5633661A JP11005679A JP11005679A JPS5633661A JP S5633661 A JPS5633661 A JP S5633661A JP 11005679 A JP11005679 A JP 11005679A JP 11005679 A JP11005679 A JP 11005679A JP S5633661 A JPS5633661 A JP S5633661A
Authority
JP
Japan
Prior art keywords
latent image
image corresponding
electrostatic latent
copied
photoreceptor
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
JP11005679A
Other languages
Japanese (ja)
Other versions
JPS6360389B2 (en
Inventor
Tsuneo Saito
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11005679A priority Critical patent/JPS5633661A/en
Publication of JPS5633661A publication Critical patent/JPS5633661A/en
Publication of JPS6360389B2 publication Critical patent/JPS6360389B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Developing For Electrophotography (AREA)
  • Wet Developing In Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To render image density uniform by forming an electrostatic latent image corresponding to a specified pattern of constant density on a photoreceptor at the same time as an electrostatic latent image corresponding to the image to be copied is formed. CONSTITUTION:Exposure-scanning photoreceptor 8 in accordance with the image to be copied forms on photoreceptor 8 an electrostatic latent image corresponding to the image to be copied, and this latent image is developed in developing unit 10 with a bias voltage applied in the title copying machine. In forming the latent image corresponding to the image to be copied, an electrostatic latent image corresponding to specified pattern 3 of constant density is simultaneously formed on photoreceptor 8, and the developed density of the electrostatic latent image corresponding to this specified pattern is detected with detector 22. The title machine is provided with a bias voltage control circuit for variably controlling development bias voltage in accordance with the results obtained by judging the developed density of pattern 3 on the basis of output signal of detector 22.
JP11005679A 1979-08-29 1979-08-29 Copying machine Granted JPS5633661A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11005679A JPS5633661A (en) 1979-08-29 1979-08-29 Copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11005679A JPS5633661A (en) 1979-08-29 1979-08-29 Copying machine

Publications (2)

Publication Number Publication Date
JPS5633661A true JPS5633661A (en) 1981-04-04
JPS6360389B2 JPS6360389B2 (en) 1988-11-24

Family

ID=14525962

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11005679A Granted JPS5633661A (en) 1979-08-29 1979-08-29 Copying machine

Country Status (1)

Country Link
JP (1) JPS5633661A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6049365A (en) * 1983-08-29 1985-03-18 Canon Inc Development bias voltage controller of electrophotographic device
JPS6073645A (en) * 1983-09-30 1985-04-25 Fujitsu Ltd Polychromatic printer
JPH0392874A (en) * 1989-09-05 1991-04-18 Minolta Camera Co Ltd Image forming device

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956487A (en) * 1955-03-23 1960-10-18 Rca Corp Electrostatic printing
JPS5363020A (en) * 1976-11-18 1978-06-06 Ricoh Co Ltd Image control method
JPS5393030A (en) * 1977-01-27 1978-08-15 Ricoh Co Ltd Copying process control method of electrophotographic copying machine
JPS53103736A (en) * 1977-02-23 1978-09-09 Ricoh Co Ltd Auto-bias development for xerographic copying machine
JPS5410743A (en) * 1977-06-27 1979-01-26 Canon Inc Image forming apparatus
JPS5461938A (en) * 1977-10-27 1979-05-18 Konishiroku Photo Ind Co Ltd Copy concentration controller/paper clogging detector
JPS5472058A (en) * 1977-11-21 1979-06-09 Ricoh Co Ltd Image adjustment correcting method of electrophotographic copiers
JPS5497044A (en) * 1978-01-17 1979-07-31 Konishiroku Photo Ind Co Ltd Toner concentration controller for zerographic copier
JPS5497038A (en) * 1978-01-17 1979-07-31 Konishiroku Photo Ind Co Ltd Image density controller for zerographic copier
JPS55127573A (en) * 1979-03-26 1980-10-02 Fuji Xerox Co Ltd Gain adjusting method of toner image detector in electrophotographic copier
JPS55127571A (en) * 1979-03-26 1980-10-02 Fuji Xerox Co Ltd Control method of electrophotographic copier

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956487A (en) * 1955-03-23 1960-10-18 Rca Corp Electrostatic printing
JPS5363020A (en) * 1976-11-18 1978-06-06 Ricoh Co Ltd Image control method
JPS5393030A (en) * 1977-01-27 1978-08-15 Ricoh Co Ltd Copying process control method of electrophotographic copying machine
JPS53103736A (en) * 1977-02-23 1978-09-09 Ricoh Co Ltd Auto-bias development for xerographic copying machine
JPS5410743A (en) * 1977-06-27 1979-01-26 Canon Inc Image forming apparatus
JPS5461938A (en) * 1977-10-27 1979-05-18 Konishiroku Photo Ind Co Ltd Copy concentration controller/paper clogging detector
JPS5472058A (en) * 1977-11-21 1979-06-09 Ricoh Co Ltd Image adjustment correcting method of electrophotographic copiers
JPS5497044A (en) * 1978-01-17 1979-07-31 Konishiroku Photo Ind Co Ltd Toner concentration controller for zerographic copier
JPS5497038A (en) * 1978-01-17 1979-07-31 Konishiroku Photo Ind Co Ltd Image density controller for zerographic copier
JPS55127573A (en) * 1979-03-26 1980-10-02 Fuji Xerox Co Ltd Gain adjusting method of toner image detector in electrophotographic copier
JPS55127571A (en) * 1979-03-26 1980-10-02 Fuji Xerox Co Ltd Control method of electrophotographic copier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6049365A (en) * 1983-08-29 1985-03-18 Canon Inc Development bias voltage controller of electrophotographic device
JPS6073645A (en) * 1983-09-30 1985-04-25 Fujitsu Ltd Polychromatic printer
JPH0392874A (en) * 1989-09-05 1991-04-18 Minolta Camera Co Ltd Image forming device

Also Published As

Publication number Publication date
JPS6360389B2 (en) 1988-11-24

Similar Documents

Publication Publication Date Title
JPS5436725A (en) Zerographic copying method
JPS5497038A (en) Image density controller for zerographic copier
JPS5560967A (en) Electrophotographic apparatus
JPS55118048A (en) Method and apparatus for developing
JPS57200054A (en) Picture forming device
JPS5611466A (en) Electrophotographic copier using belt photoreceptor
JPS5633661A (en) Copying machine
DE3463859D1 (en) Automatic developing bias control device
JPS53110840A (en) Electrophotographic copier
JPS5393835A (en) Copy picture quality controller of electrostatic copying machine
JPS5515185A (en) Image density control method
JPS5499632A (en) Image adjusting method of copying machines
JPS5785070A (en) Control device for copying density of electrophotographic copier
JPS5497034A (en) Image quality controller for electrostatic copier
JPS5642242A (en) Electrophotographic method
JPS55127572A (en) Control unit of electrophotographic copier
JPS5776564A (en) Control system of copy surface image
JPS57181568A (en) Electrophotographic copying machine
JPS5389432A (en) Electrophotography
JPS57164739A (en) Copying apparatus
JPS56128976A (en) Picture density controller of copying machine
JPS56128961A (en) Copying machine
JPS5557858A (en) Transfer bias control method of electrophotographic copier
JPS5799665A (en) Controller for original image exposure of electronic copying machine
JPS5672467A (en) Development bias control method