Nothing Special   »   [go: up one dir, main page]

JPS55127571A - Control method of electrophotographic copier - Google Patents

Control method of electrophotographic copier

Info

Publication number
JPS55127571A
JPS55127571A JP3423179A JP3423179A JPS55127571A JP S55127571 A JPS55127571 A JP S55127571A JP 3423179 A JP3423179 A JP 3423179A JP 3423179 A JP3423179 A JP 3423179A JP S55127571 A JPS55127571 A JP S55127571A
Authority
JP
Japan
Prior art keywords
circuit
comparator
control
control circuit
detector
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
JP3423179A
Other languages
Japanese (ja)
Other versions
JPH0313585B2 (en
Inventor
Masaaki 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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP3423179A priority Critical patent/JPS55127571A/en
Priority to PH23788A priority patent/PH21237A/en
Publication of JPS55127571A publication Critical patent/JPS55127571A/en
Publication of JPH0313585B2 publication Critical patent/JPH0313585B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To obtain always stable copied images by specifying control signals such as toner feed amount, bias voltage, etc.
CONSTITUTION: A sample holding circuit 15, comparator 16, central control circuit 20, etc. are provided between a detector 10 which detects the density of the toner image of the reference target formed on a photoreceptor and various control circuits 22. As a result of this, the output of the detector 10 is subjected to drift compensation and gain adjustment by a drift compensating circuit 13 and gain adjusting circuit 14 and is inputted via sample holding circuit 15 to a comparator 16, by which the comparison with the reference density signal from a reference circuit 19 and the correction by a bias correcting circuit 18 are done. The output of the comparator 16 causes the central control circuit 20 to control a developing bias control circuit 22a, toner feed amount control circuit 22c, etc with the specified control mode . Hence, the correct controlling is accomplished irrespective of the aging of each part of the copying machine.
COPYRIGHT: (C)1980,JPO&Japio
JP3423179A 1979-03-26 1979-03-26 Control method of electrophotographic copier Granted JPS55127571A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP3423179A JPS55127571A (en) 1979-03-26 1979-03-26 Control method of electrophotographic copier
PH23788A PH21237A (en) 1979-03-26 1980-03-20 Copy condition control method for electrophotographic copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3423179A JPS55127571A (en) 1979-03-26 1979-03-26 Control method of electrophotographic copier

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP63285788A Division JPH026970A (en) 1988-11-14 1988-11-14 Control method for electronic copying machine

Publications (2)

Publication Number Publication Date
JPS55127571A true JPS55127571A (en) 1980-10-02
JPH0313585B2 JPH0313585B2 (en) 1991-02-22

Family

ID=12408364

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3423179A Granted JPS55127571A (en) 1979-03-26 1979-03-26 Control method of electrophotographic copier

Country Status (2)

Country Link
JP (1) JPS55127571A (en)
PH (1) PH21237A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5633661A (en) * 1979-08-29 1981-04-04 Toshiba Corp Copying machine
JPS57181568A (en) * 1981-05-02 1982-11-09 Minolta Camera Co Ltd Electrophotographic copying machine
JPS5827154A (en) * 1981-08-07 1983-02-17 インタ−ナシヨナル・ビジネス・マシ−ンズ・コ−ポレ−シヨン Monitoring for action of copying machine
JPS58182650A (en) * 1982-04-20 1983-10-25 Ricoh Co Ltd Method for adjusting control device for image density of electrophotographic copying machine
JPS58190966A (en) * 1982-05-01 1983-11-08 Minolta Camera Co Ltd Electrophotographic copying machine
JPS5974570A (en) * 1982-10-20 1984-04-27 Ricoh Co Ltd Picture quality controlling method of electrostatic recording system
JPS59174862A (en) * 1983-03-24 1984-10-03 Ricoh Co Ltd Stabilizing method of density of copy image
JPH026970A (en) * 1988-11-14 1990-01-11 Fuji Xerox Co Ltd Control method for electronic copying machine
US5946524A (en) * 1997-12-04 1999-08-31 Minolta Co., Ltd. Image forming apparatus and image density regulating method
US7215897B2 (en) 2002-09-30 2007-05-08 Canon Kabushiki Kaisha Image forming apparatus and program for controlling image forming apparatus
US7526219B2 (en) 2003-03-14 2009-04-28 Ricoh Company, Ltd. Image forming apparatus and method of calculating an amount of toner transfer by converting regular reflection output into a normalized value

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5393030A (en) * 1977-01-27 1978-08-15 Ricoh Co Ltd Copying process control method of electrophotographic copying machine
JPS546561A (en) * 1977-06-16 1979-01-18 Toshiba Corp Developer concentration controller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5393030A (en) * 1977-01-27 1978-08-15 Ricoh Co Ltd Copying process control method of electrophotographic copying machine
JPS546561A (en) * 1977-06-16 1979-01-18 Toshiba Corp Developer concentration controller

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6360389B2 (en) * 1979-08-29 1988-11-24
JPS5633661A (en) * 1979-08-29 1981-04-04 Toshiba Corp Copying machine
JPS57181568A (en) * 1981-05-02 1982-11-09 Minolta Camera Co Ltd Electrophotographic copying machine
JPH031664B2 (en) * 1981-05-02 1991-01-11 Minolta Camera Kk
JPS5827154A (en) * 1981-08-07 1983-02-17 インタ−ナシヨナル・ビジネス・マシ−ンズ・コ−ポレ−シヨン Monitoring for action of copying machine
JPS58182650A (en) * 1982-04-20 1983-10-25 Ricoh Co Ltd Method for adjusting control device for image density of electrophotographic copying machine
JPS58190966A (en) * 1982-05-01 1983-11-08 Minolta Camera Co Ltd Electrophotographic copying machine
JPH0445825B2 (en) * 1982-10-20 1992-07-28 Ricoh Kk
JPS5974570A (en) * 1982-10-20 1984-04-27 Ricoh Co Ltd Picture quality controlling method of electrostatic recording system
JPS59174862A (en) * 1983-03-24 1984-10-03 Ricoh Co Ltd Stabilizing method of density of copy image
JPH026970A (en) * 1988-11-14 1990-01-11 Fuji Xerox Co Ltd Control method for electronic copying machine
JPH0529908B2 (en) * 1988-11-14 1993-05-06 Fuji Xerox Co Ltd
US5946524A (en) * 1997-12-04 1999-08-31 Minolta Co., Ltd. Image forming apparatus and image density regulating method
US7215897B2 (en) 2002-09-30 2007-05-08 Canon Kabushiki Kaisha Image forming apparatus and program for controlling image forming apparatus
US7526219B2 (en) 2003-03-14 2009-04-28 Ricoh Company, Ltd. Image forming apparatus and method of calculating an amount of toner transfer by converting regular reflection output into a normalized value
US7546046B2 (en) 2003-03-14 2009-06-09 Ricoh Company, Ltd. Method and apparatus for controlling an image density
US7773899B2 (en) 2003-03-14 2010-08-10 Ricoh Company, Ltd. Image forming apparatus and method of calculating an amount of toner transfer by converting diffuse reflection output into a conversion value

Also Published As

Publication number Publication date
PH21237A (en) 1987-08-21
JPH0313585B2 (en) 1991-02-22

Similar Documents

Publication Publication Date Title
US4724461A (en) Dynamic process control for electrostatographic machines
JPS55127571A (en) Control method of electrophotographic copier
US5754918A (en) Electrostatic control with compensation for coupling effects
JPS5560967A (en) Electrophotographic apparatus
JP3715758B2 (en) Image forming apparatus
JPS57200054A (en) Picture forming device
CA2076770C (en) Electrostatic voltermeter (esv) zero offset adjustment
US4619520A (en) Variable magnification electrophotographic copying apparatus
JPS5486347A (en) Development stabilizing system
JP2007286524A (en) Image forming apparatus
WO1988003670A1 (en) Dynamic feedforward process control for electrographic machines
US5339135A (en) Charged area (CAD) image loss control in a tri-level imaging apparatus
US5946524A (en) Image forming apparatus and image density regulating method
JP3076614B2 (en) Color image forming equipment
JPS55127572A (en) Control unit of electrophotographic copier
JPS5472058A (en) Image adjustment correcting method of electrophotographic copiers
JPS5785070A (en) Control device for copying density of electrophotographic copier
JPS55127573A (en) Gain adjusting method of toner image detector in electrophotographic copier
JPS55101959A (en) Image forming device
JPS55127575A (en) Control method of electrophotographic copier
JPS56150762A (en) Control method for surface potential of photoreceptor of electrophotographic copier
JP2698094B2 (en) Color balance control method for multicolor image forming apparatus
JPH05306999A (en) Correcting device for sensor for density detection
JPS5770551A (en) Copy image adjustment method
JPS56151946A (en) Electrophotographic copier