JPS56151967A - Developing device - Google Patents

Developing device

Info

Publication number
JPS56151967A
JPS56151967A JP5571280A JP5571280A JPS56151967A JP S56151967 A JPS56151967 A JP S56151967A JP 5571280 A JP5571280 A JP 5571280A JP 5571280 A JP5571280 A JP 5571280A JP S56151967 A JPS56151967 A JP S56151967A
Authority
JP
Japan
Prior art keywords
developer
charging quantity
recesses
long term
proper value
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
JP5571280A
Other languages
Japanese (ja)
Other versions
JPS647666B2 (en
Inventor
Kimio Nakahata
Masaaki Sakurai
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP5571280A priority Critical patent/JPS56151967A/en
Publication of JPS56151967A publication Critical patent/JPS56151967A/en
Publication of JPS647666B2 publication Critical patent/JPS647666B2/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
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
    • G03G15/0921—Details concerning the magnetic brush roller structure, e.g. magnet configuration
    • G03G15/0928—Details concerning the magnetic brush roller structure, e.g. magnet configuration relating to the shell, e.g. structure, composition

Landscapes

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

Abstract

PURPOSE:To obtain stable images over a long term by forming many recesses and small holes on the surface of a developer support and embedding a substance increasing the triboelectric charging quantity of a developer in the recesses, etc. CONSTITUTION:To increase the triboelectric charging quantity of a one-component developer to a proper value, a charge controller is added to the developer, yet when the controller is used over a long term, developer support 9 is coated. As a result, the charging quantity is not increased to the proper value to cause a reduction in the image density. In order to prevent the coating, many recesses and small holes 11 are formed in alumite sleeve 10 of support 9, and nylon 66 is embedded in recesses and holes 11. When copy is repeated 30,000 times using the resulting sleeve, no reduction in the image density is caused since the nylon 66 increases the charging quantity to the proper value. Thus, stable images are obtd. over a long term.
JP5571280A 1980-04-26 1980-04-26 Developing device Granted JPS56151967A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5571280A JPS56151967A (en) 1980-04-26 1980-04-26 Developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5571280A JPS56151967A (en) 1980-04-26 1980-04-26 Developing device

Publications (2)

Publication Number Publication Date
JPS56151967A true JPS56151967A (en) 1981-11-25
JPS647666B2 JPS647666B2 (en) 1989-02-09

Family

ID=13006482

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5571280A Granted JPS56151967A (en) 1980-04-26 1980-04-26 Developing device

Country Status (1)

Country Link
JP (1) JPS56151967A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5770573A (en) * 1980-10-20 1982-05-01 Hitachi Metals Ltd Image formation
EP0497601A2 (en) * 1991-01-31 1992-08-05 Canon Kabushiki Kaisha Developing apparatus and developer carrying member therefor
EP0516419A2 (en) * 1991-05-29 1992-12-02 Canon Kabushiki Kaisha Developing apparatus and developer carrying member therefor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49115549A (en) * 1973-03-08 1974-11-05
JPS5030537A (en) * 1973-02-15 1975-03-26
JPS5045639A (en) * 1973-08-27 1975-04-23
US3893418A (en) * 1974-05-30 1975-07-08 Xerox Corp Xerographic developing apparatus
JPS53129041A (en) * 1977-04-16 1978-11-10 Ricoh Co Ltd Carrier for electrophotographic dry type developing agent
JPS542133A (en) * 1977-06-02 1979-01-09 Xerox Corp Carrier material comprising insulator particle and conductive particle
JPS5511299A (en) * 1979-07-09 1980-01-26 Konishiroku Photo Ind Co Ltd Image forming method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5030537A (en) * 1973-02-15 1975-03-26
JPS49115549A (en) * 1973-03-08 1974-11-05
JPS5045639A (en) * 1973-08-27 1975-04-23
US3893418A (en) * 1974-05-30 1975-07-08 Xerox Corp Xerographic developing apparatus
JPS53129041A (en) * 1977-04-16 1978-11-10 Ricoh Co Ltd Carrier for electrophotographic dry type developing agent
JPS542133A (en) * 1977-06-02 1979-01-09 Xerox Corp Carrier material comprising insulator particle and conductive particle
JPS5511299A (en) * 1979-07-09 1980-01-26 Konishiroku Photo Ind Co Ltd Image forming method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5770573A (en) * 1980-10-20 1982-05-01 Hitachi Metals Ltd Image formation
EP0497601A2 (en) * 1991-01-31 1992-08-05 Canon Kabushiki Kaisha Developing apparatus and developer carrying member therefor
EP0516419A2 (en) * 1991-05-29 1992-12-02 Canon Kabushiki Kaisha Developing apparatus and developer carrying member therefor

Also Published As

Publication number Publication date
JPS647666B2 (en) 1989-02-09

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