JPS6410281A - Copying machine - Google Patents

Copying machine

Info

Publication number
JPS6410281A
JPS6410281A JP62167579A JP16757987A JPS6410281A JP S6410281 A JPS6410281 A JP S6410281A JP 62167579 A JP62167579 A JP 62167579A JP 16757987 A JP16757987 A JP 16757987A JP S6410281 A JPS6410281 A JP S6410281A
Authority
JP
Japan
Prior art keywords
mode
toner
developing sleeve
potential difference
supplying roller
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
JP62167579A
Other languages
Japanese (ja)
Inventor
Kenju Oka
Naoki Toyokichi
Tomoaki Yokoyama
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP62167579A priority Critical patent/JPS6410281A/en
Priority to US07/214,644 priority patent/US4912513A/en
Priority to DE3822591A priority patent/DE3822591A1/en
Publication of JPS6410281A publication Critical patent/JPS6410281A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Brush Developing In Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To obtain the copied images having different image reproducibility which is excellent in answering by providing a mode where potential difference between a developing sleeve and a toner supplying roller is relatively large and a mode where said difference is relatively small and making it possible to select both modes. CONSTITUTION:The mode where the potential difference between the developing sleeve 4 and the toner supplying roller 9 is relatively large and the mode where said difference is relatively small are provided and both modes can be selected according to original images. When the mode where the potential difference is large is selected, the quantity of recovered toner from the developing sleeve 4 to the toner supplying roller 9 becomes larger than the quantity of supplying toner from the toner supplying roller 9 to the developing sleeve 4 and the toner concentration of a developer on the developing sleeve is reduced. When the mode where the potential difference is small is selected, the other concentration is increased, so that the image reproducibility changes. Thus, the image reproducibility of the gradation, etc. of the copied images can be instantly changed with a simple constitution.
JP62167579A 1987-07-02 1987-07-02 Copying machine Pending JPS6410281A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP62167579A JPS6410281A (en) 1987-07-02 1987-07-02 Copying machine
US07/214,644 US4912513A (en) 1987-07-02 1988-07-01 Developing apparatus with variable developing bias voltage
DE3822591A DE3822591A1 (en) 1987-07-02 1988-07-04 COPIER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62167579A JPS6410281A (en) 1987-07-02 1987-07-02 Copying machine

Publications (1)

Publication Number Publication Date
JPS6410281A true JPS6410281A (en) 1989-01-13

Family

ID=15852364

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62167579A Pending JPS6410281A (en) 1987-07-02 1987-07-02 Copying machine

Country Status (1)

Country Link
JP (1) JPS6410281A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8346109B2 (en) * 2008-08-29 2013-01-01 Oki Data Corporation Image forming apparatus with reset operation processing unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8346109B2 (en) * 2008-08-29 2013-01-01 Oki Data Corporation Image forming apparatus with reset operation processing unit

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