JPS5521027A - Detector of remaining amount of developer - Google Patents

Detector of remaining amount of developer

Info

Publication number
JPS5521027A
JPS5521027A JP9326078A JP9326078A JPS5521027A JP S5521027 A JPS5521027 A JP S5521027A JP 9326078 A JP9326078 A JP 9326078A JP 9326078 A JP9326078 A JP 9326078A JP S5521027 A JPS5521027 A JP S5521027A
Authority
JP
Japan
Prior art keywords
developer
signal
developing powder
warns
shortage
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
JP9326078A
Other languages
Japanese (ja)
Other versions
JPS5924420B2 (en
Inventor
Takashi Yano
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 JP53093260A priority Critical patent/JPS5924420B2/en
Publication of JPS5521027A publication Critical patent/JPS5521027A/en
Publication of JPS5924420B2 publication Critical patent/JPS5924420B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Dry Development In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To prevent the production of defective copies by detecting the remaining amount of the developer in an apparatus such as facsimile or the like and letting the first signal which warns the shortage of the developer and the second signal which warns the prohibition of use when the developer becomes further shorter. CONSTITUTION:When the developing powder 6 in a hopper is gradually consumed, the amounts of the developing powder existing in small chambers 7, 8 also decrease and the quantity of light reaching a photo detector 10 from a light emitting lement 9 increases, causing the first signal to be emitted. At this stage, still several tens sheets of copying is feasible. As the remained developing powder is further consumed, the developing density begins to gradually decrease, causing the second signal to be outputted. By making double warnigns of developer shortage in this way, the production of defective copies may be prevented, downtime minimized and the sure and rapid reproduction and transmission of information in information processing machines accomplished.
JP53093260A 1978-07-31 1978-07-31 Developer remaining amount detection device Expired JPS5924420B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53093260A JPS5924420B2 (en) 1978-07-31 1978-07-31 Developer remaining amount detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53093260A JPS5924420B2 (en) 1978-07-31 1978-07-31 Developer remaining amount detection device

Publications (2)

Publication Number Publication Date
JPS5521027A true JPS5521027A (en) 1980-02-14
JPS5924420B2 JPS5924420B2 (en) 1984-06-09

Family

ID=14077509

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53093260A Expired JPS5924420B2 (en) 1978-07-31 1978-07-31 Developer remaining amount detection device

Country Status (1)

Country Link
JP (1) JPS5924420B2 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5723973A (en) * 1980-07-18 1982-02-08 Hitachi Koki Co Ltd Toner empty detection circuit for laser printer
JPS5872174A (en) * 1981-10-23 1983-04-30 Minolta Camera Co Ltd Copying machine
JPS60193565U (en) * 1984-06-01 1985-12-23 富士ゼロックス株式会社 Copy machine toner full detection device
JPS6150162A (en) * 1985-08-01 1986-03-12 Minolta Camera Co Ltd Copying machine
JPS61153666A (en) * 1984-12-27 1986-07-12 Sharp Corp Device for stopping copying at the lack of toner
JPS62201026U (en) * 1986-06-13 1987-12-22
JPS6374082A (en) * 1986-09-18 1988-04-04 Sanyo Electric Co Ltd Image forming device
JPS6384139U (en) * 1986-11-21 1988-06-02
JPS63284582A (en) * 1987-05-15 1988-11-21 Sharp Corp Toner concentration controller
JPH01154180A (en) * 1987-12-11 1989-06-16 Konica Corp Image forming device
KR100423480B1 (en) * 2001-11-20 2004-03-18 삼성전자주식회사 Printer having plural toner density sensor and a supply of toner control method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0514216U (en) * 1991-08-05 1993-02-23 聖資 長場 Dust remover
JP2022047844A (en) 2020-09-14 2022-03-25 三菱電機株式会社 Semiconductor device and method for manufacturing semiconductor device

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5723973A (en) * 1980-07-18 1982-02-08 Hitachi Koki Co Ltd Toner empty detection circuit for laser printer
JPH0233156B2 (en) * 1981-10-23 1990-07-25 Minolta Camera Kk
JPS5872174A (en) * 1981-10-23 1983-04-30 Minolta Camera Co Ltd Copying machine
JPS60193565U (en) * 1984-06-01 1985-12-23 富士ゼロックス株式会社 Copy machine toner full detection device
JPH0322766Y2 (en) * 1984-06-01 1991-05-17
JPS61153666A (en) * 1984-12-27 1986-07-12 Sharp Corp Device for stopping copying at the lack of toner
JPS6150162A (en) * 1985-08-01 1986-03-12 Minolta Camera Co Ltd Copying machine
JPH0446429B2 (en) * 1985-08-01 1992-07-29 Minolta Camera Kk
JPS62201026U (en) * 1986-06-13 1987-12-22
JPS6374082A (en) * 1986-09-18 1988-04-04 Sanyo Electric Co Ltd Image forming device
JPS6384139U (en) * 1986-11-21 1988-06-02
JPS63284582A (en) * 1987-05-15 1988-11-21 Sharp Corp Toner concentration controller
JPH01154180A (en) * 1987-12-11 1989-06-16 Konica Corp Image forming device
KR100423480B1 (en) * 2001-11-20 2004-03-18 삼성전자주식회사 Printer having plural toner density sensor and a supply of toner control method thereof

Also Published As

Publication number Publication date
JPS5924420B2 (en) 1984-06-09

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