JPS565562A - Toner concentration control method - Google Patents
Toner concentration control methodInfo
- Publication number
- JPS565562A JPS565562A JP8109179A JP8109179A JPS565562A JP S565562 A JPS565562 A JP S565562A JP 8109179 A JP8109179 A JP 8109179A JP 8109179 A JP8109179 A JP 8109179A JP S565562 A JPS565562 A JP S565562A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- toner concentration
- output
- circuit consisting
- peak
- 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.)
- Pending
Links
Abstract
PURPOSE:To accurately perform toner concentration controlling by performing correction for the fluctuating factors of exposure process and developing process in the toner concentration control method of performing toner concentration detection on the drum of an electrophotographic apparatus. CONSTITUTION:The photosensitive stripes on the drum are irradiated by the light of a light emitting diode 1 which is let to emit light by the voltage divided from a power source E1 by resistances R1, R2 and the reflected light thereof is detected with a photodiode 2. The output thereof is amplified by an amplifier A1 and is inverted by the inversion circuit consisting of an amplifier A2, and resistance R4, R5. Thence, the set voltage by a variable resistance VR1 is added by the addition circuit consisting of the amplifier A3 and resistances R6-R10. The output thereof is detected and held of its peak by the peak holding circuit consisting of a peak detecting amplifier A4, holding amplifier A5, etc. and the output thereof causes a toner replenishing part to actuate, thereby controlling the toner concentration so that it becomes constant.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8109179A JPS565562A (en) | 1979-06-27 | 1979-06-27 | Toner concentration control method |
US06/103,825 US4279498A (en) | 1978-12-28 | 1979-12-14 | Electrostatographic copying apparatus with automatic toner density control |
DE2952672A DE2952672C2 (en) | 1978-12-28 | 1979-12-28 | Electrophotographic copier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8109179A JPS565562A (en) | 1979-06-27 | 1979-06-27 | Toner concentration control method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS565562A true JPS565562A (en) | 1981-01-21 |
Family
ID=13736709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8109179A Pending JPS565562A (en) | 1978-12-28 | 1979-06-27 | Toner concentration control method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS565562A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56164354A (en) * | 1980-05-22 | 1981-12-17 | Fuji Xerox Co Ltd | Image density detector of electrophotographic copying machine |
JPH01218608A (en) * | 1988-02-29 | 1989-08-31 | Nikka Chem Co Ltd | Antifoaming agent |
JP2007236906A (en) * | 2006-03-03 | 2007-09-20 | Tadashi Kawada | Punch presuming apparatus |
-
1979
- 1979-06-27 JP JP8109179A patent/JPS565562A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56164354A (en) * | 1980-05-22 | 1981-12-17 | Fuji Xerox Co Ltd | Image density detector of electrophotographic copying machine |
JPH01218608A (en) * | 1988-02-29 | 1989-08-31 | Nikka Chem Co Ltd | Antifoaming agent |
JPH0374122B2 (en) * | 1988-02-29 | 1991-11-26 | ||
JP2007236906A (en) * | 2006-03-03 | 2007-09-20 | Tadashi Kawada | Punch presuming apparatus |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5497038A (en) | Image density controller for zerographic copier | |
JPS5337025A (en) | Stabilizing method for electrostatic latent | |
JPS5823043A (en) | Automatic density controlling method of copying machine | |
JPS5518667A (en) | Stabilization method of image density | |
JPS57200054A (en) | Picture forming device | |
JPS565562A (en) | Toner concentration control method | |
TW253035B (en) | Method of controlling image density | |
JPS5784463A (en) | Image former | |
JPS5393835A (en) | Copy picture quality controller of electrostatic copying machine | |
GB1496855A (en) | Electrophotographic copying device | |
JPS56161555A (en) | Controller of electrophotographic copying machine | |
JPS5740279A (en) | Image stabilization method | |
JPS55127573A (en) | Gain adjusting method of toner image detector in electrophotographic copier | |
JPS5555349A (en) | Control unit of electrophotographic copier | |
JPS54126552A (en) | Toner replenishing device for developing of copying machines and others | |
JPS5589885A (en) | Photoreceptor replacing method | |
JPS53102745A (en) | Correcting method of degrees of fatigue of photosensitive body of electrophotographic copying machine | |
JPS5723972A (en) | Control method for development bias | |
JPS5472062A (en) | Heat sensitive recording method | |
JPS5678857A (en) | Toner density detecting device | |
JPS5688142A (en) | Image density control device | |
JPS57164739A (en) | Copying apparatus | |
JPS5776564A (en) | Control system of copy surface image | |
JPS5729061A (en) | Detector for remaining amount of toner of electrophotographic copier | |
SU815707A1 (en) | Device for exposure to electrographic apparatus |