JPS5472058A - Image adjustment correcting method of electrophotographic copiers - Google Patents
Image adjustment correcting method of electrophotographic copiersInfo
- 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
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
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)
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 |
-
1977
- 1977-11-21 JP JP13965477A patent/JPS5472058A/en active Granted
Cited By (6)
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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