JPS5565976A - Toner concentration control unit of recorder - Google Patents

Toner concentration control unit of recorder

Info

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
Application number
JP13918778A
Other languages
Japanese (ja)
Inventor
Hiroaki Ueno
Onori Abe
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 JP13918778A priority Critical patent/JPS5565976A/en
Publication of JPS5565976A publication Critical patent/JPS5565976A/en
Pending legal-status Critical Current

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  • 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.
JP13918778A 1978-11-11 1978-11-11 Toner concentration control unit of recorder Pending JPS5565976A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6373769U (en) * 1986-10-29 1988-05-17
JPS6374656U (en) * 1986-11-05 1988-05-18

Cited By (2)

* Cited by examiner, † Cited by third party
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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