JPS6478267A - Copying device - Google Patents

Copying device

Info

Publication number
JPS6478267A
JPS6478267A JP62235989A JP23598987A JPS6478267A JP S6478267 A JPS6478267 A JP S6478267A JP 62235989 A JP62235989 A JP 62235989A JP 23598987 A JP23598987 A JP 23598987A JP S6478267 A JPS6478267 A JP S6478267A
Authority
JP
Japan
Prior art keywords
photosensitive drum
copying
speed
developing devices
developing
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
JP62235989A
Other languages
Japanese (ja)
Inventor
Noriya Nishimura
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP62235989A priority Critical patent/JPS6478267A/en
Publication of JPS6478267A publication Critical patent/JPS6478267A/en
Pending legal-status Critical Current

Links

Landscapes

  • Photoreceptors In Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)
  • Color Electrophotography (AREA)

Abstract

PURPOSE:To use a photosensitive body in a copying device provided with plural developing devices without lowering a copying efficiency by changing the relative speed of the photosensitive body and the developing device which is used for development according to the developing device which is used for development. CONSTITUTION:In order to obtain the potential of the surface of the photosensitive drum 1 corresponding to all white of an original in the positions of the developing devices 31 and 32, it is necessary to lower the rotary speed of the photosensitive drum 1-150mm/s, especially, in the 1st developing device 31 since the electric potential is not fully lowered by the time exposing position attains the developing devices 31 and 32 if the rotary speed of the photosensitive drum 1 is comparatively large. Thus, the titled device uses a carrier-life type one which can perform high speed copying as the photosensitive drum and provides plural developing devices, then it changes the rotating speed of the photosensitive drum according as which developing device is used. Therefore, in case of using black toner whose use frequency is high, copying can be performed at high speed and also color toner can be used by lowering the rotating speed of the photosensitive drum.
JP62235989A 1987-09-19 1987-09-19 Copying device Pending JPS6478267A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62235989A JPS6478267A (en) 1987-09-19 1987-09-19 Copying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62235989A JPS6478267A (en) 1987-09-19 1987-09-19 Copying device

Publications (1)

Publication Number Publication Date
JPS6478267A true JPS6478267A (en) 1989-03-23

Family

ID=16994163

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62235989A Pending JPS6478267A (en) 1987-09-19 1987-09-19 Copying device

Country Status (1)

Country Link
JP (1) JPS6478267A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0602853A2 (en) * 1992-12-18 1994-06-22 Xerox Corporation System and method for operating a multitone imaging apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0602853A2 (en) * 1992-12-18 1994-06-22 Xerox Corporation System and method for operating a multitone imaging apparatus
EP0602853A3 (en) * 1992-12-18 1995-09-13 Xerox Corp System and method for operating a multitone imaging apparatus.

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