JPS53110848A - Detector of residual amount of developer - Google Patents

Detector of residual amount of developer

Info

Publication number
JPS53110848A
JPS53110848A JP2540777A JP2540777A JPS53110848A JP S53110848 A JPS53110848 A JP S53110848A JP 2540777 A JP2540777 A JP 2540777A JP 2540777 A JP2540777 A JP 2540777A JP S53110848 A JPS53110848 A JP S53110848A
Authority
JP
Japan
Prior art keywords
residual amount
developer
detector
electrophotography
coil
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
JP2540777A
Other languages
Japanese (ja)
Other versions
JPS6034750B2 (en
Inventor
Koichi Noguchi
Kunio Hibi
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 JP2540777A priority Critical patent/JPS6034750B2/en
Priority to GB823878A priority patent/GB1597753A/en
Priority to US05/884,532 priority patent/US4186341A/en
Priority to DE19782810502 priority patent/DE2810502C2/en
Publication of JPS53110848A publication Critical patent/JPS53110848A/en
Publication of JPS6034750B2 publication Critical patent/JPS6034750B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE:To automatically and correctly detect residual amount by magnetically detecting the residual amount of a developer through the change in the frequency produced in a coil in a dry type developing device, etc. of electrophotography.
JP2540777A 1977-03-10 1977-03-10 Developer remaining amount detection device Expired JPS6034750B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2540777A JPS6034750B2 (en) 1977-03-10 1977-03-10 Developer remaining amount detection device
GB823878A GB1597753A (en) 1977-03-10 1978-03-02 Apparatus and methods of detecting a residual amount of magnetic developer in a nonmagnetic container
US05/884,532 US4186341A (en) 1977-03-10 1978-03-08 Magnetic developing agent level detection apparatus using an oscillator whose frequency is controlled by the level
DE19782810502 DE2810502C2 (en) 1977-03-10 1978-03-10 Device for determining the amount of a magnetic developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2540777A JPS6034750B2 (en) 1977-03-10 1977-03-10 Developer remaining amount detection device

Publications (2)

Publication Number Publication Date
JPS53110848A true JPS53110848A (en) 1978-09-27
JPS6034750B2 JPS6034750B2 (en) 1985-08-10

Family

ID=12165050

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2540777A Expired JPS6034750B2 (en) 1977-03-10 1977-03-10 Developer remaining amount detection device

Country Status (1)

Country Link
JP (1) JPS6034750B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55135874A (en) * 1979-04-12 1980-10-23 Ricoh Co Ltd Remaining developer amount detector
US4682895A (en) * 1985-08-06 1987-07-28 Texas A&M University Fiber optic probe for quantification of colorimetric reactions
US5397411A (en) * 1990-05-22 1995-03-14 Optex Biomedical, Inc. Method for making optical probe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH058780Y2 (en) * 1985-04-15 1993-03-04

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55135874A (en) * 1979-04-12 1980-10-23 Ricoh Co Ltd Remaining developer amount detector
JPS6316743B2 (en) * 1979-04-12 1988-04-11 Ricoh Kk
US4682895A (en) * 1985-08-06 1987-07-28 Texas A&M University Fiber optic probe for quantification of colorimetric reactions
US5397411A (en) * 1990-05-22 1995-03-14 Optex Biomedical, Inc. Method for making optical probe

Also Published As

Publication number Publication date
JPS6034750B2 (en) 1985-08-10

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