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JPS5517104A - Toner remainder detector of electrophotographic copier - Google Patents

Toner remainder detector of electrophotographic copier

Info

Publication number
JPS5517104A
JPS5517104A JP8827078A JP8827078A JPS5517104A JP S5517104 A JPS5517104 A JP S5517104A JP 8827078 A JP8827078 A JP 8827078A JP 8827078 A JP8827078 A JP 8827078A JP S5517104 A JPS5517104 A JP S5517104A
Authority
JP
Japan
Prior art keywords
drive motor
current
toner
toner remainder
voltage
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.)
Granted
Application number
JP8827078A
Other languages
Japanese (ja)
Other versions
JPS6315582B2 (en
Inventor
Koji Maruyama
Mitsuo Hayashi
Takao Yorifuji
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.)
Canon Finetech Nisca Inc
Original Assignee
Copyer 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 Copyer Co Ltd filed Critical Copyer Co Ltd
Priority to JP8827078A priority Critical patent/JPS5517104A/en
Publication of JPS5517104A publication Critical patent/JPS5517104A/en
Publication of JPS6315582B2 publication Critical patent/JPS6315582B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To exactly detect the amount of toner remainder, by electrically catching decrease of torque in the drive motor of a developing unit. CONSTITUTION:Drop of development torque can be caught as drop of the current of a drive motor circuit. The current value of drive motor 7 of a developing vessel can be caught by resistance 9 as voltage change. This voltage is rectified and amplified and sent to comparator 12, where a reference voltage is set to the voltage level corresponding to current Ci at the limit point of developing ability due to consumption of the toner, and the above detected value is compared with this set value. When the detected value exceeds the set value, comparator 12 provides a signal to indicate this state in display device 13, permitting the toner remainder limit to be exactly detected.
JP8827078A 1978-07-21 1978-07-21 Toner remainder detector of electrophotographic copier Granted JPS5517104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8827078A JPS5517104A (en) 1978-07-21 1978-07-21 Toner remainder detector of electrophotographic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8827078A JPS5517104A (en) 1978-07-21 1978-07-21 Toner remainder detector of electrophotographic copier

Publications (2)

Publication Number Publication Date
JPS5517104A true JPS5517104A (en) 1980-02-06
JPS6315582B2 JPS6315582B2 (en) 1988-04-05

Family

ID=13938193

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8827078A Granted JPS5517104A (en) 1978-07-21 1978-07-21 Toner remainder detector of electrophotographic copier

Country Status (1)

Country Link
JP (1) JPS5517104A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61261760A (en) * 1985-05-15 1986-11-19 Konishiroku Photo Ind Co Ltd Developing device
US4702941A (en) * 1984-03-27 1987-10-27 Motorola Inc. Gold metallization process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4702941A (en) * 1984-03-27 1987-10-27 Motorola Inc. Gold metallization process
JPS61261760A (en) * 1985-05-15 1986-11-19 Konishiroku Photo Ind Co Ltd Developing device
JPH0570820B2 (en) * 1985-05-15 1993-10-05 Konishiroku Photo Ind

Also Published As

Publication number Publication date
JPS6315582B2 (en) 1988-04-05

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