JPS57154268A - Detector for remaining amount of developer - Google Patents

Detector for remaining amount of developer

Info

Publication number
JPS57154268A
JPS57154268A JP3877081A JP3877081A JPS57154268A JP S57154268 A JPS57154268 A JP S57154268A JP 3877081 A JP3877081 A JP 3877081A JP 3877081 A JP3877081 A JP 3877081A JP S57154268 A JPS57154268 A JP S57154268A
Authority
JP
Japan
Prior art keywords
toner
electrodes
remaining
amt
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.)
Pending
Application number
JP3877081A
Other languages
Japanese (ja)
Inventor
Shuji Watanabe
Kazunori Kushima
Yasuhisa Ikeda
Hiroyuki Hoshino
Yukio Tokunaga
Hiroyuki Miyata
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.)
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Oki Electric Industry 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 Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP3877081A priority Critical patent/JPS57154268A/en
Publication of JPS57154268A publication Critical patent/JPS57154268A/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

Abstract

PURPOSE:To make the remaining amt. of a developer detectable surely by detecting the change in electrostatic capacity owing to the remaining amt. of the toner between a pair of electrodes. CONSTITUTION:When a toner 3 exists sufficiently in a developing device 2, and a pair of electrodes 7a, 7b are in the toner 3, a monostable multi 9 does not output any signal. When the toner 3 decreases to expose the electrodes 7a, 7b, an output signal is obtained in the multi 9 and is applied via an LPF 10 to a comparator 11, by the compared output whereof it is detected that the amt. of the toner remaining in the developing device is small.
JP3877081A 1981-03-19 1981-03-19 Detector for remaining amount of developer Pending JPS57154268A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3877081A JPS57154268A (en) 1981-03-19 1981-03-19 Detector for remaining amount of developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3877081A JPS57154268A (en) 1981-03-19 1981-03-19 Detector for remaining amount of developer

Publications (1)

Publication Number Publication Date
JPS57154268A true JPS57154268A (en) 1982-09-24

Family

ID=12534523

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3877081A Pending JPS57154268A (en) 1981-03-19 1981-03-19 Detector for remaining amount of developer

Country Status (1)

Country Link
JP (1) JPS57154268A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6415112B1 (en) 1998-11-13 2002-07-02 Canon Kabushiki Kaisha Toner remaining amount detecting device, toner remaining amount detecting method, process cartridge and electrophotographic image forming apparatus
KR100425895B1 (en) * 2000-04-06 2004-04-03 캐논 가부시끼가이샤 Developing device, process cartridge and image forming apparatus
US6859627B2 (en) * 1998-12-28 2005-02-22 Canon Kabushiki Kaisha Image developing apparatus, process cartridge, electrophotographic image forming apparatus, and developing unit frame

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5274346A (en) * 1975-12-18 1977-06-22 Toshiba Corp Detector for toner residue
JPS5448250A (en) * 1977-09-24 1979-04-16 Nec Corp Detecting mechanism of remaining quantity of toner of magnedry developing device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5274346A (en) * 1975-12-18 1977-06-22 Toshiba Corp Detector for toner residue
JPS5448250A (en) * 1977-09-24 1979-04-16 Nec Corp Detecting mechanism of remaining quantity of toner of magnedry developing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6415112B1 (en) 1998-11-13 2002-07-02 Canon Kabushiki Kaisha Toner remaining amount detecting device, toner remaining amount detecting method, process cartridge and electrophotographic image forming apparatus
US6859627B2 (en) * 1998-12-28 2005-02-22 Canon Kabushiki Kaisha Image developing apparatus, process cartridge, electrophotographic image forming apparatus, and developing unit frame
US7095967B2 (en) 1998-12-28 2006-08-22 Canon Kabushiki Kaisha Image developing apparatus, process cartridge, electrophotographic image forming apparatus, and developing unit frame
KR100425895B1 (en) * 2000-04-06 2004-04-03 캐논 가부시끼가이샤 Developing device, process cartridge and image forming apparatus

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