JPS6440965A - Toner concentration controller - Google Patents

Toner concentration controller

Info

Publication number
JPS6440965A
JPS6440965A JP19744887A JP19744887A JPS6440965A JP S6440965 A JPS6440965 A JP S6440965A JP 19744887 A JP19744887 A JP 19744887A JP 19744887 A JP19744887 A JP 19744887A JP S6440965 A JPS6440965 A JP S6440965A
Authority
JP
Japan
Prior art keywords
developer
toner
end part
surface part
toner concentration
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
JP19744887A
Other languages
Japanese (ja)
Inventor
Masao Hayashi
Kenichi Tokieda
Katsuhide Sano
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.)
Toshiba Corp
Toshiba Intelligent Technology Co Ltd
Original Assignee
Toshiba Corp
Toshiba Intelligent Technology 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 Toshiba Corp, Toshiba Intelligent Technology Co Ltd filed Critical Toshiba Corp
Priority to JP19744887A priority Critical patent/JPS6440965A/en
Publication of JPS6440965A publication Critical patent/JPS6440965A/en
Pending legal-status Critical Current

Links

Landscapes

  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To improve the reliability of the titled toner concentration controller and to make its constitution compact by providing the function of a toner concentration detection probe to the outer peripherals surface part of an end part of a developer support body which conveys a developer, and performing optical detection. CONSTITUTION:A developing roller 31 which conveys the developer is so constituted not to convey the developer at the outer peripheral surface part of its end part 31a, but to stick and convey only toner in the developer. Namely, magnetic pole parts 42-44 for developer conveyance in the outer peripheral surface part of the end part 31a of the developing roller 31 are removed and one magnetic pole part is arranged as a developer holding pole 51 opposite a doctor blade 34 to stick only the toner on the outer peripheral surface part of the end part 31a of the developing roller 31 by trioelectrification or mechanically, thereby conveying the toner. Then a reflection type optical sensor 54 detects variation in the quantity of the stuck toner optical to measure the toner concentration in the developer and the toner is supplied to a developing device 5 according to the measurement result. Consequently, the reliability is improved and the constitution is made compact.
JP19744887A 1987-08-07 1987-08-07 Toner concentration controller Pending JPS6440965A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19744887A JPS6440965A (en) 1987-08-07 1987-08-07 Toner concentration controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19744887A JPS6440965A (en) 1987-08-07 1987-08-07 Toner concentration controller

Publications (1)

Publication Number Publication Date
JPS6440965A true JPS6440965A (en) 1989-02-13

Family

ID=16374675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19744887A Pending JPS6440965A (en) 1987-08-07 1987-08-07 Toner concentration controller

Country Status (1)

Country Link
JP (1) JPS6440965A (en)

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