JPS5776573A - Toner concentration detecting device - Google Patents

Toner concentration detecting device

Info

Publication number
JPS5776573A
JPS5776573A JP15321380A JP15321380A JPS5776573A JP S5776573 A JPS5776573 A JP S5776573A JP 15321380 A JP15321380 A JP 15321380A JP 15321380 A JP15321380 A JP 15321380A JP S5776573 A JPS5776573 A JP S5776573A
Authority
JP
Japan
Prior art keywords
toner
cover
concentration
discharge port
detecting apparatus
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
JP15321380A
Other languages
Japanese (ja)
Inventor
Mitsuo Yamashita
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15321380A priority Critical patent/JPS5776573A/en
Publication of JPS5776573A publication Critical patent/JPS5776573A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To prevent dirt of the detecting surface of a detecting apparatus and to detect the concentration of a toner exactly over a long period of time, by providing a discharge port on a probe cover, and discharging a floating toner which has entered the side of an optical detecting apparatus. CONSTITUTION:A rotary probe 8 and a probe cover 11 are provided on the upper part of a magnet roll 2, an optical detecting apparatus 9 consisting of a light emission element 13 and a photodetecting element 12 is installed to the cover 11, and the concentration is detected by variation of reflected rays of a toner. Also, on the cover 11, a discharge port 13 for a floating toner is provided, and is connected to a chamber 14. According to this constitution, even if the floating toner enters the cover 11, it is discharged into the chamber 14 through the discharge port 13, therefore, dirt by a toner on the detecting surface is prvented, and the concentration of a toner is detected exactly over a long period of time.
JP15321380A 1980-10-31 1980-10-31 Toner concentration detecting device Pending JPS5776573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15321380A JPS5776573A (en) 1980-10-31 1980-10-31 Toner concentration detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15321380A JPS5776573A (en) 1980-10-31 1980-10-31 Toner concentration detecting device

Publications (1)

Publication Number Publication Date
JPS5776573A true JPS5776573A (en) 1982-05-13

Family

ID=15557513

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15321380A Pending JPS5776573A (en) 1980-10-31 1980-10-31 Toner concentration detecting device

Country Status (1)

Country Link
JP (1) JPS5776573A (en)

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