JPS5472058A - Image adjustment correcting method of electrophotographic copiers - Google Patents

Image adjustment correcting method of electrophotographic copiers

Info

Publication number
JPS5472058A
JPS5472058A JP13965477A JP13965477A JPS5472058A JP S5472058 A JPS5472058 A JP S5472058A JP 13965477 A JP13965477 A JP 13965477A JP 13965477 A JP13965477 A JP 13965477A JP S5472058 A JPS5472058 A JP S5472058A
Authority
JP
Japan
Prior art keywords
image adjustment
change
exposure
conditions
developing bias
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
JP13965477A
Other languages
Japanese (ja)
Other versions
JPS6140988B2 (en
Inventor
Susumu Tatsumi
Tadahiro Eda
Tsutomu Imai
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 JP13965477A priority Critical patent/JPS5472058A/en
Publication of JPS5472058A publication Critical patent/JPS5472058A/en
Publication of JPS6140988B2 publication Critical patent/JPS6140988B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To enable image adjustment correction to be performed with high reliability by adjusting exposure or developing bias potential with respect to the change of the quantity of light with time or the change of characteristics of photoreceptor with time.
CONSTITUTION: The copier has beforehand been set in the inital conditions so that the developing bias current becomes zero in the position for general originals by using the original 1 for correction of image adjustment conditions. When the copier has been used for a certain period in this state, a change in exposure with time or a change in the characteristics of a photoreceptor 1 occurs owing to the degradation of a light source 11, contamination of a mirror 12, etc., resulting in the deviated balance of the process conditions. In such a case, therefore, the exposure is changed by changing the position of a slit 14 by turning an image adjustment correcting dial 16. Namely, by changing the exposure slit opening width from the position of DS to the position of DT, the developing bias current is made zero and may be set at the initial conditions.
COPYRIGHT: (C)1979,JPO&Japio
JP13965477A 1977-11-21 1977-11-21 Image adjustment correcting method of electrophotographic copiers Granted JPS5472058A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13965477A JPS5472058A (en) 1977-11-21 1977-11-21 Image adjustment correcting method of electrophotographic copiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13965477A JPS5472058A (en) 1977-11-21 1977-11-21 Image adjustment correcting method of electrophotographic copiers

Publications (2)

Publication Number Publication Date
JPS5472058A true JPS5472058A (en) 1979-06-09
JPS6140988B2 JPS6140988B2 (en) 1986-09-12

Family

ID=15250296

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13965477A Granted JPS5472058A (en) 1977-11-21 1977-11-21 Image adjustment correcting method of electrophotographic copiers

Country Status (1)

Country Link
JP (1) JPS5472058A (en)

Cited By (5)

* 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
JPS5688142A (en) * 1979-12-20 1981-07-17 Toshiba Corp Image density control device
JPS58158664A (en) * 1982-03-16 1983-09-20 Konishiroku Photo Ind Co Ltd Controlling method of bias voltage of developing device
JPS59137962A (en) * 1983-01-27 1984-08-08 Sharp Corp Method for measuring surface potential of photosensitive body
JPS59210455A (en) * 1983-05-02 1984-11-29 ゼロツクス・コ−ポレ−シヨン Control system for electrophotographic printer

Cited By (6)

* 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
JPS6360389B2 (en) * 1979-08-29 1988-11-24
JPS5688142A (en) * 1979-12-20 1981-07-17 Toshiba Corp Image density control device
JPS58158664A (en) * 1982-03-16 1983-09-20 Konishiroku Photo Ind Co Ltd Controlling method of bias voltage of developing device
JPS59137962A (en) * 1983-01-27 1984-08-08 Sharp Corp Method for measuring surface potential of photosensitive body
JPS59210455A (en) * 1983-05-02 1984-11-29 ゼロツクス・コ−ポレ−シヨン Control system for electrophotographic printer

Also Published As

Publication number Publication date
JPS6140988B2 (en) 1986-09-12

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