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JPS56158356A - Density control method for developer - Google Patents

Density control method for developer

Info

Publication number
JPS56158356A
JPS56158356A JP6250880A JP6250880A JPS56158356A JP S56158356 A JPS56158356 A JP S56158356A JP 6250880 A JP6250880 A JP 6250880A JP 6250880 A JP6250880 A JP 6250880A JP S56158356 A JPS56158356 A JP S56158356A
Authority
JP
Japan
Prior art keywords
supplied
value
amount
density
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
JP6250880A
Other languages
Japanese (ja)
Other versions
JPS645298B2 (en
Inventor
Takahiro Inoue
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 Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP6250880A priority Critical patent/JPS56158356A/en
Publication of JPS56158356A publication Critical patent/JPS56158356A/en
Publication of JPS645298B2 publication Critical patent/JPS645298B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0849—Detection or control means for the developer concentration
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0849—Detection or control means for the developer concentration
    • G03G15/0855—Detection or control means for the developer concentration the concentration being measured by optical means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To keep the density of a developer at a constant level with high accuracy, by integrating the amount of the developer that is supplied during a copying of a specified number of sheets and computing and compensating the reference density value based on the integrated amount. CONSTITUTION:The output signal of a reflection density detector 5 is amplified by an amplifier 13 and then converted into a digital signal by an A/D converter 14 to be supplied to a microcomputer 15. The copying signal is also supplied to the computer 15 from the main body 16 of a copying machine. The digitlized detected density value is compared with the reference density value stored previously in the computer 15. In case the detected density value is smaller then the reference value, the toner is supplied by an amount equivalent to the difference between the reference value and the detected value. This supplied amount of toner is added to a memory. When the number of copy sheets reaches the prescribed value, an arithmetic process is carried out based on the supplied amount of toner that is added to the memory to give an arithmetic compensation to the reference density.
JP6250880A 1980-05-12 1980-05-12 Density control method for developer Granted JPS56158356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6250880A JPS56158356A (en) 1980-05-12 1980-05-12 Density control method for developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6250880A JPS56158356A (en) 1980-05-12 1980-05-12 Density control method for developer

Publications (2)

Publication Number Publication Date
JPS56158356A true JPS56158356A (en) 1981-12-07
JPS645298B2 JPS645298B2 (en) 1989-01-30

Family

ID=13202179

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6250880A Granted JPS56158356A (en) 1980-05-12 1980-05-12 Density control method for developer

Country Status (1)

Country Link
JP (1) JPS56158356A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58176659A (en) * 1982-04-12 1983-10-17 Konishiroku Photo Ind Co Ltd Control device for replenishing of toner
JPS6045278A (en) * 1983-08-22 1985-03-11 Ricoh Co Ltd Toner concentration control device
JPS6084558A (en) * 1983-10-15 1985-05-13 Fuji Xerox Co Ltd Automatic toner concentration controller
JPS6084557A (en) * 1983-10-15 1985-05-13 Fuji Xerox Co Ltd Automatic toner concentration controller
JPS6147973A (en) * 1984-08-16 1986-03-08 Ricoh Co Ltd Toner concentration controlling method
JPS6146565U (en) * 1984-08-30 1986-03-28 富士ゼロックス株式会社 Automatic toner density control device
JPS63177173A (en) * 1987-01-19 1988-07-21 Canon Inc Developing device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5484741A (en) * 1977-12-19 1979-07-05 Ricoh Co Ltd Toner density controlling method and device for copier

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5484741A (en) * 1977-12-19 1979-07-05 Ricoh Co Ltd Toner density controlling method and device for copier

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58176659A (en) * 1982-04-12 1983-10-17 Konishiroku Photo Ind Co Ltd Control device for replenishing of toner
JPS6045278A (en) * 1983-08-22 1985-03-11 Ricoh Co Ltd Toner concentration control device
JPS6084558A (en) * 1983-10-15 1985-05-13 Fuji Xerox Co Ltd Automatic toner concentration controller
JPS6084557A (en) * 1983-10-15 1985-05-13 Fuji Xerox Co Ltd Automatic toner concentration controller
JPS6147973A (en) * 1984-08-16 1986-03-08 Ricoh Co Ltd Toner concentration controlling method
JPS6146565U (en) * 1984-08-30 1986-03-28 富士ゼロックス株式会社 Automatic toner density control device
JPS63177173A (en) * 1987-01-19 1988-07-21 Canon Inc Developing device

Also Published As

Publication number Publication date
JPS645298B2 (en) 1989-01-30

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