JPS5565976A - Toner concentration control unit of recorder - Google Patents
Toner concentration control unit of recorderInfo
- Publication number
- JPS5565976A JPS5565976A JP13918778A JP13918778A JPS5565976A JP S5565976 A JPS5565976 A JP S5565976A JP 13918778 A JP13918778 A JP 13918778A JP 13918778 A JP13918778 A JP 13918778A JP S5565976 A JPS5565976 A JP S5565976A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- toner concentration
- voltage
- output voltage
- toner
- 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
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
PURPOSE:To hold toner concentration always at the preset reference value by adding compensation to toner concentration controlling based on the stains of toner concentrating detecting pars. CONSTITUTION:The output voltage of an electric circuit 4 which amplifies the difference of the holding voltage of a sample holding circuit 3 and preset voltage and applies the same to a light emitting element 1b is applied to the base of the FET18 which is interposed between a photoelectric transducer 1a and resistance R1 and connects resistance R18 in a toner concentration detecting circuit 1. As a result, when the stains of the toner concentration detecting parts 1a, 1b increase, the output voltage level of the circuit 4 lowers and the conductivity of the FET18 increases, resulting in the decreased output voltage A of the circuit A and therefore the compensation for the stained components is applied to the output of the circuit 1 from the circuit 2 according to the reference voltage of the electric circuit 2. Thereby, the toner concentration may be held at the preset reference value.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13918778A JPS5565976A (en) | 1978-11-11 | 1978-11-11 | Toner concentration control unit of recorder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13918778A JPS5565976A (en) | 1978-11-11 | 1978-11-11 | Toner concentration control unit of recorder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5565976A true JPS5565976A (en) | 1980-05-17 |
Family
ID=15239573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13918778A Pending JPS5565976A (en) | 1978-11-11 | 1978-11-11 | Toner concentration control unit of recorder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5565976A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6373769U (en) * | 1986-10-29 | 1988-05-17 | ||
JPS6374656U (en) * | 1986-11-05 | 1988-05-18 |
-
1978
- 1978-11-11 JP JP13918778A patent/JPS5565976A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6373769U (en) * | 1986-10-29 | 1988-05-17 | ||
JPS6374656U (en) * | 1986-11-05 | 1988-05-18 |
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