JPS57195256A - Controlling method for toner density - Google Patents

Controlling method for toner density

Info

Publication number
JPS57195256A
JPS57195256A JP56080390A JP8039081A JPS57195256A JP S57195256 A JPS57195256 A JP S57195256A JP 56080390 A JP56080390 A JP 56080390A JP 8039081 A JP8039081 A JP 8039081A JP S57195256 A JPS57195256 A JP S57195256A
Authority
JP
Japan
Prior art keywords
cpu29
photodetector
toner
held
ground surface
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.)
Pending
Application number
JP56080390A
Other languages
Japanese (ja)
Inventor
Koji Hirakura
Yoshihiro Abe
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 JP56080390A priority Critical patent/JPS57195256A/en
Publication of JPS57195256A publication Critical patent/JPS57195256A/en
Pending 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
    • G03G15/0855—Detection or control means for the developer concentration the concentration being measured by optical means
    • 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
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5033—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor
    • G03G15/5041—Detecting a toner image, e.g. density, toner coverage, using a test patch

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To make the stable controlling of toner density possible by detecting the reflected rays from the ground surface and standard concn. pattern of a latent image carrier respectively. CONSTITUTION:The non-image parts of a photosensitive drum 11, that is, the ground surface is irradiated with a light emitting element 25, and the reflected light thereof is detected with a photodetector 26. The detection signal thereof is held in a CPU29 after A/D conversion 28. The value thereof is defined as VG. The reflected light from the standard pattern 24 formed on the drum 11 is similarly detected with the element 25 and the photodetector 26, and the digital signal thereof is held in the CPU29. The value thereof is defined as VP. The CPU29 operates a driver 31 in such a way that the detection signals VG and VP attain a constant ratio, thereby replenishing a toner into a developing vessel 17. In this way, the change in the characteristics of the light emitting element and the photodetector is corrected and the density of the toner is controlled stably.
JP56080390A 1981-05-27 1981-05-27 Controlling method for toner density Pending JPS57195256A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56080390A JPS57195256A (en) 1981-05-27 1981-05-27 Controlling method for toner density

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56080390A JPS57195256A (en) 1981-05-27 1981-05-27 Controlling method for toner density

Publications (1)

Publication Number Publication Date
JPS57195256A true JPS57195256A (en) 1982-11-30

Family

ID=13716954

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56080390A Pending JPS57195256A (en) 1981-05-27 1981-05-27 Controlling method for toner density

Country Status (1)

Country Link
JP (1) JPS57195256A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58190966A (en) * 1982-05-01 1983-11-08 Minolta Camera Co Ltd Electrophotographic copying machine
JPS5981654A (en) * 1982-10-29 1984-05-11 Konishiroku Photo Ind Co Ltd Method for controlling electrostatic recording device
JPS63177175A (en) * 1987-01-19 1988-07-21 Canon Inc Image forming device
JPH0193754A (en) * 1987-10-06 1989-04-12 Ricoh Co Ltd Image density control method
JPH02189568A (en) * 1988-12-13 1990-07-25 Internatl Business Mach Corp <Ibm> Control of amount of developing toner for image former
JPH06294755A (en) * 1993-04-08 1994-10-21 Sharp Corp Method and circuit for automatic compensation of image quality

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55151669A (en) * 1979-05-11 1980-11-26 Xerox Corp Method and device for distributing toner and copier using same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55151669A (en) * 1979-05-11 1980-11-26 Xerox Corp Method and device for distributing toner and copier using same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58190966A (en) * 1982-05-01 1983-11-08 Minolta Camera Co Ltd Electrophotographic copying machine
JPS5981654A (en) * 1982-10-29 1984-05-11 Konishiroku Photo Ind Co Ltd Method for controlling electrostatic recording device
JPH047510B2 (en) * 1982-10-29 1992-02-12 Konishiroku Photo Ind
JPS63177175A (en) * 1987-01-19 1988-07-21 Canon Inc Image forming device
JPH0193754A (en) * 1987-10-06 1989-04-12 Ricoh Co Ltd Image density control method
JPH02189568A (en) * 1988-12-13 1990-07-25 Internatl Business Mach Corp <Ibm> Control of amount of developing toner for image former
JPH06294755A (en) * 1993-04-08 1994-10-21 Sharp Corp Method and circuit for automatic compensation of image quality

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