JPS5574564A - Bias device of variable-power copying machine - Google Patents

Bias device of variable-power copying machine

Info

Publication number
JPS5574564A
JPS5574564A JP14832078A JP14832078A JPS5574564A JP S5574564 A JPS5574564 A JP S5574564A JP 14832078 A JP14832078 A JP 14832078A JP 14832078 A JP14832078 A JP 14832078A JP S5574564 A JPS5574564 A JP S5574564A
Authority
JP
Japan
Prior art keywords
developing
copying
magnifications
sensors
differences
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
JP14832078A
Other languages
Japanese (ja)
Other versions
JPS633307B2 (en
Inventor
Yuichi Kobayashi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP14832078A priority Critical patent/JPS5574564A/en
Publication of JPS5574564A publication Critical patent/JPS5574564A/en
Publication of JPS633307B2 publication Critical patent/JPS633307B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To obtain copies of the same quality from the same original irrespective of differences in copying magnifications by changing the size of the detecting part of the sensors detecting the surface potentials of a photoreceptor at the time of varying copying magnifications.
CONSTITUTION: A developing device performs developing by sending developing solution between a photoreceptor drum 1 and developing tray 3 through its solution discharge port 8. The developing tray 3 also serves as a developing electrode and is applied with bias voltage. Behind the discharge port 8 are disposed sensors 9 and the surface potentials of the photosensitive drum 1 are detected by these sensors 9. The sensor electrodes 10W12 are connected to terminal 17 by the combinations corresponding to copying magnifications by switches 14W16. Since the sensor electrodes 10W12 are so constituted that their overall length may be changed according to copying magnifications, the copies of always the same quality may be obtained irrespective of the differences in magnification at the time of copying the same original at varying magnifications.
COPYRIGHT: (C)1980,JPO&Japio
JP14832078A 1978-11-30 1978-11-30 Bias device of variable-power copying machine Granted JPS5574564A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14832078A JPS5574564A (en) 1978-11-30 1978-11-30 Bias device of variable-power copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14832078A JPS5574564A (en) 1978-11-30 1978-11-30 Bias device of variable-power copying machine

Publications (2)

Publication Number Publication Date
JPS5574564A true JPS5574564A (en) 1980-06-05
JPS633307B2 JPS633307B2 (en) 1988-01-22

Family

ID=15450141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14832078A Granted JPS5574564A (en) 1978-11-30 1978-11-30 Bias device of variable-power copying machine

Country Status (1)

Country Link
JP (1) JPS5574564A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58217956A (en) * 1982-06-12 1983-12-19 Fuji Xerox Co Ltd Automatic adjusting device for copying position
JPS5912456A (en) * 1982-07-13 1984-01-23 Canon Inc Picture forming device
JPS59136728A (en) * 1983-01-26 1984-08-06 Canon Inc Image forming device
JPS59159153A (en) * 1983-02-28 1984-09-08 Canon Inc Reproducing and outputting device of image
JPS6010268A (en) * 1983-06-30 1985-01-19 Canon Inc Image processor
JPS6010269A (en) * 1983-06-30 1985-01-19 Canon Inc Image processor
JPS6010267A (en) * 1983-06-30 1985-01-19 Canon Inc Image processor
JPS6035751A (en) * 1983-08-06 1985-02-23 Canon Inc Image control device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58217956A (en) * 1982-06-12 1983-12-19 Fuji Xerox Co Ltd Automatic adjusting device for copying position
JPS5912456A (en) * 1982-07-13 1984-01-23 Canon Inc Picture forming device
JPH0541993B2 (en) * 1983-01-26 1993-06-25 Canon Kk
JPS59136728A (en) * 1983-01-26 1984-08-06 Canon Inc Image forming device
JPS59159153A (en) * 1983-02-28 1984-09-08 Canon Inc Reproducing and outputting device of image
JPS6010269A (en) * 1983-06-30 1985-01-19 Canon Inc Image processor
JPS6010267A (en) * 1983-06-30 1985-01-19 Canon Inc Image processor
JPH0532748B2 (en) * 1983-06-30 1993-05-17 Canon Kk
JPS6010268A (en) * 1983-06-30 1985-01-19 Canon Inc Image processor
JPH0555868B2 (en) * 1983-06-30 1993-08-18 Canon Kk
JPH0555867B2 (en) * 1983-06-30 1993-08-18 Canon Kk
JPS6035751A (en) * 1983-08-06 1985-02-23 Canon Inc Image control device
JPH0555872B2 (en) * 1983-08-06 1993-08-18 Canon Kk

Also Published As

Publication number Publication date
JPS633307B2 (en) 1988-01-22

Similar Documents

Publication Publication Date Title
JPS5574564A (en) Bias device of variable-power copying machine
JPS5689174A (en) Solid image pickup device
JPS53110532A (en) Automatic controller of developer concentrations of wet type diazo copiers
JPS5282241A (en) Color copying machine
JPS5370567A (en) Water level sensing circuit for washing machine
JPS55120058A (en) Developing roller
JPS5396836A (en) Rormation of many trasfrred copies from one latent image
JPS55106478A (en) Electrostatic latent image developing unit
JPS5298534A (en) Copying machine
JPS5670579A (en) Liquid developing device of electrophotographic copier
JPS53101435A (en) Liquid developing processor for electrophotography
JPS5382354A (en) Optica device fdr electrophotographic copier
JPS5424638A (en) Magnetic brush developing device
JPS5536856A (en) High voltage power source device for electrophotographic copier
JPS5215327A (en) Treating system for the electro-record image
JPS52146638A (en) Developing device for electrostatic image
JPS53101434A (en) Liquid developing processor for electrophotography
JPS5559475A (en) Developing electrostatic field control unit of wet type electrophotography
JPS55120061A (en) Transfer device
JPS52116244A (en) Both cleaning and developing means for electro-photographic copier
JPS55151665A (en) Electrode cleaning device of copying machine
JPS5245342A (en) Charging device by the double corona discharge
JPS5761376A (en) Image synthetic facsimile device
JPS55138770A (en) Developing electrode cleaning device of copying machine
JPS5256940A (en) Development device for dry type electrophotographic copying machine