JPS56107273A - Detector for residual amount of toner of electrophotographic dry type developing device - Google Patents

Detector for residual amount of toner of electrophotographic dry type developing device

Info

Publication number
JPS56107273A
JPS56107273A JP18843280A JP18843280A JPS56107273A JP S56107273 A JPS56107273 A JP S56107273A JP 18843280 A JP18843280 A JP 18843280A JP 18843280 A JP18843280 A JP 18843280A JP S56107273 A JPS56107273 A JP S56107273A
Authority
JP
Japan
Prior art keywords
toner
residual amount
detector
developing device
dry type
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
JP18843280A
Other languages
Japanese (ja)
Inventor
Toyoo Okamoto
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 JP18843280A priority Critical patent/JPS56107273A/en
Publication of JPS56107273A publication Critical patent/JPS56107273A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Brush Developing In Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To automatically detect the residual amount of a toner by providing an optical detecting means consisting of a light emitting element and a photodetector, and capturing the light falling to a developing roller and reflected therefrom. CONSTITUTION:A detecting part 9 provided with a light source 11 and a photosemiconductor element 12 is disposed in proximity to a developing roller 4, and is mounted to a stationary bracket 10. The element 12 constitutes one side of a bridge circuit, and with a change in the resistance value of this element 12, a potential difference is generated in the bridge, by which a detecting lamp 15 is lighted or other alarm device is operated. In this way, the residual amount of the toner is detected automatically with a slight expense; nevertheless, the device for this purpose is mounted to the machine frame irrespective of the mounting and dismounting of a toner receiving hopper and separately from the developing part.
JP18843280A 1980-12-27 1980-12-27 Detector for residual amount of toner of electrophotographic dry type developing device Pending JPS56107273A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18843280A JPS56107273A (en) 1980-12-27 1980-12-27 Detector for residual amount of toner of electrophotographic dry type developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18843280A JPS56107273A (en) 1980-12-27 1980-12-27 Detector for residual amount of toner of electrophotographic dry type developing device

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP48083612A Division JPS5925220B2 (en) 1973-07-26 1973-07-26 Toner remaining amount detection device for electrophotographic dry developing device

Publications (1)

Publication Number Publication Date
JPS56107273A true JPS56107273A (en) 1981-08-26

Family

ID=16223563

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18843280A Pending JPS56107273A (en) 1980-12-27 1980-12-27 Detector for residual amount of toner of electrophotographic dry type developing device

Country Status (1)

Country Link
JP (1) JPS56107273A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5034243A (en) * 1973-07-26 1975-04-02

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5034243A (en) * 1973-07-26 1975-04-02

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