JPS5496047A - Dry type electrophotographic copier - Google Patents

Dry type electrophotographic copier

Info

Publication number
JPS5496047A
JPS5496047A JP15382077A JP15382077A JPS5496047A JP S5496047 A JPS5496047 A JP S5496047A JP 15382077 A JP15382077 A JP 15382077A JP 15382077 A JP15382077 A JP 15382077A JP S5496047 A JPS5496047 A JP S5496047A
Authority
JP
Japan
Prior art keywords
toner
toner concentration
concentration
maintaining device
developer
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
JP15382077A
Other languages
Japanese (ja)
Other versions
JPS6356544B2 (en
Inventor
Kenji Kojima
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 JP15382077A priority Critical patent/JPS5496047A/en
Publication of JPS5496047A publication Critical patent/JPS5496047A/en
Publication of JPS6356544B2 publication Critical patent/JPS6356544B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To prevent the occurrence of toner shortage and uneven concentrations by letting a toner concentration maintaining device of two component developer actuate continually at the ending of copying when the toner concentration is insufficient and let the same stand by when the toner concentration has reached a specified value. CONSTITUTION:With the toner concentration maintaining device being put in a developing tank 1, the developer is stirred by its stirring screw and the toner concentration of the developer 4 circulating along the surface of a magnetic roll 2 and scraping-off plate 3 is detected with a toner sensor 5. When the toner concentration is insufficient, the toner in a toner tank 6 is replenished into the developing tank 1 by the toner replenisher which actuates according to the output of the toner sensor 5. This toner concentration maintaining device is actuated not only at the copying operation but at the standby as well until the toner concentration reaches the specified value. Namely, if toner replenishing is accomplished at intervals of a time shorter than the specified time at the ending of copying operation, the toner sensor and toner replenishing part are actuated continually unitl the specified time is reached.
JP15382077A 1977-12-21 1977-12-21 Dry type electrophotographic copier Granted JPS5496047A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15382077A JPS5496047A (en) 1977-12-21 1977-12-21 Dry type electrophotographic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15382077A JPS5496047A (en) 1977-12-21 1977-12-21 Dry type electrophotographic copier

Publications (2)

Publication Number Publication Date
JPS5496047A true JPS5496047A (en) 1979-07-30
JPS6356544B2 JPS6356544B2 (en) 1988-11-08

Family

ID=15570797

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15382077A Granted JPS5496047A (en) 1977-12-21 1977-12-21 Dry type electrophotographic copier

Country Status (1)

Country Link
JP (1) JPS5496047A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56104358A (en) * 1980-01-22 1981-08-20 Matsushita Electric Ind Co Ltd Electrophotographic copier
JPS56128656U (en) * 1980-03-03 1981-09-30
JPS58130366A (en) * 1982-01-29 1983-08-03 Canon Inc Developing device
JPS60263974A (en) * 1984-06-13 1985-12-27 Hitachi Ltd Toner supply controller
JPS62136676A (en) * 1985-12-11 1987-06-19 Canon Inc Recording device
JPS62136677A (en) * 1985-12-11 1987-06-19 Canon Inc Image recording device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5260629A (en) * 1975-11-14 1977-05-19 Fuji Xerox Co Ltd Method of replenishing toner for electronic copying machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5260629A (en) * 1975-11-14 1977-05-19 Fuji Xerox Co Ltd Method of replenishing toner for electronic copying machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56104358A (en) * 1980-01-22 1981-08-20 Matsushita Electric Ind Co Ltd Electrophotographic copier
JPS6318747B2 (en) * 1980-01-22 1988-04-20 Matsushita Electric Ind Co Ltd
JPS56128656U (en) * 1980-03-03 1981-09-30
JPS6312353Y2 (en) * 1980-03-03 1988-04-08
JPS58130366A (en) * 1982-01-29 1983-08-03 Canon Inc Developing device
JPH0415950B2 (en) * 1982-01-29 1992-03-19 Canon Kk
JPS60263974A (en) * 1984-06-13 1985-12-27 Hitachi Ltd Toner supply controller
JPS62136676A (en) * 1985-12-11 1987-06-19 Canon Inc Recording device
JPS62136677A (en) * 1985-12-11 1987-06-19 Canon Inc Image recording device

Also Published As

Publication number Publication date
JPS6356544B2 (en) 1988-11-08

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