JPS57173865A - Picture density controller of electronic copier - Google Patents

Picture density controller of electronic copier

Info

Publication number
JPS57173865A
JPS57173865A JP56059138A JP5913881A JPS57173865A JP S57173865 A JPS57173865 A JP S57173865A JP 56059138 A JP56059138 A JP 56059138A JP 5913881 A JP5913881 A JP 5913881A JP S57173865 A JPS57173865 A JP S57173865A
Authority
JP
Japan
Prior art keywords
density
picture
toner
image
comparator
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
JP56059138A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0241752B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
Inventor
Mitsuji Nakaguchi
Harumitsu Mizuishi
Hidekazu Yumoto
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP56059138A priority Critical patent/JPS57173865A/ja
Publication of JPS57173865A publication Critical patent/JPS57173865A/ja
Publication of JPH0241752B2 publication Critical patent/JPH0241752B2/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
    • 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)
JP56059138A 1981-04-21 1981-04-21 Picture density controller of electronic copier Granted JPS57173865A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56059138A JPS57173865A (en) 1981-04-21 1981-04-21 Picture density controller of electronic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56059138A JPS57173865A (en) 1981-04-21 1981-04-21 Picture density controller of electronic copier

Publications (2)

Publication Number Publication Date
JPS57173865A true JPS57173865A (en) 1982-10-26
JPH0241752B2 JPH0241752B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1990-09-19

Family

ID=13104652

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56059138A Granted JPS57173865A (en) 1981-04-21 1981-04-21 Picture density controller of electronic copier

Country Status (1)

Country Link
JP (1) JPS57173865A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5390940A (en) * 1977-01-20 1978-08-10 Ricoh Co Ltd Method and device for detecting toner amount on photo-sensitive body
JPS54103359A (en) * 1978-01-31 1979-08-14 Sharp Corp Toner density controller
JPS5629251A (en) * 1979-08-15 1981-03-24 Ricoh Co Ltd Method for detecting density and controlling density

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5390940A (en) * 1977-01-20 1978-08-10 Ricoh Co Ltd Method and device for detecting toner amount on photo-sensitive body
JPS54103359A (en) * 1978-01-31 1979-08-14 Sharp Corp Toner density controller
JPS5629251A (en) * 1979-08-15 1981-03-24 Ricoh Co Ltd Method for detecting density and controlling density

Also Published As

Publication number Publication date
JPH0241752B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1990-09-19

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