JPS5716470A - Detecting mechanism for remaining quantity of tonor in magnet dry developer - Google Patents

Detecting mechanism for remaining quantity of tonor in magnet dry developer

Info

Publication number
JPS5716470A
JPS5716470A JP9091480A JP9091480A JPS5716470A JP S5716470 A JPS5716470 A JP S5716470A JP 9091480 A JP9091480 A JP 9091480A JP 9091480 A JP9091480 A JP 9091480A JP S5716470 A JPS5716470 A JP S5716470A
Authority
JP
Japan
Prior art keywords
tonor
resistance value
voltage
resistor
remaining quantity
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
JP9091480A
Other languages
Japanese (ja)
Inventor
Toshiya Takeuchi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP9091480A priority Critical patent/JPS5716470A/en
Publication of JPS5716470A publication Critical patent/JPS5716470A/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
    • G03G15/0856—Detection or control means for the developer level
    • 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
    • G03G15/0856—Detection or control means for the developer level
    • G03G15/086—Detection or control means for the developer level the level being measured by electro-magnetic means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)
  • Fax Reproducing Arrangements (AREA)

Abstract

PURPOSE:To display the remaining quantity of tonor in stages or continuously by arranging a resistor inside a tonor tank, converting the change of the resistance value of the resistor into voltage and current and comparing the resistance value with the standard value. CONSTITUTION:A U-shaped or V-shaped transistor 11 i inserted vertically into the tonor tank 17 of a magnet dry developer from an insulated blacket 12. Both ends of the resistor 11 are connected to the external electric circuit through a lead line 14. Since the resistance of the tonor itself is low, about 3X10<3>OMEGAcm-3X10<4>OMEGAcm, the resistance value measured on the basis of the quantity of tonor is changed. The change of the resistance value is converted into voltage, current by a resistance value-voltage current converting circuit, the output is compared with the standard value in a comparator and the compared result is displayed through a display circuit.
JP9091480A 1980-07-03 1980-07-03 Detecting mechanism for remaining quantity of tonor in magnet dry developer Pending JPS5716470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9091480A JPS5716470A (en) 1980-07-03 1980-07-03 Detecting mechanism for remaining quantity of tonor in magnet dry developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9091480A JPS5716470A (en) 1980-07-03 1980-07-03 Detecting mechanism for remaining quantity of tonor in magnet dry developer

Publications (1)

Publication Number Publication Date
JPS5716470A true JPS5716470A (en) 1982-01-27

Family

ID=14011674

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9091480A Pending JPS5716470A (en) 1980-07-03 1980-07-03 Detecting mechanism for remaining quantity of tonor in magnet dry developer

Country Status (1)

Country Link
JP (1) JPS5716470A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4951602A (en) * 1972-06-22 1974-05-20
JPS5410476U (en) * 1977-06-24 1979-01-23

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4951602A (en) * 1972-06-22 1974-05-20
JPS5410476U (en) * 1977-06-24 1979-01-23

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