JPS6459366A - Image forming device provided with plural developing devices - Google Patents

Image forming device provided with plural developing devices

Info

Publication number
JPS6459366A
JPS6459366A JP62218242A JP21824287A JPS6459366A JP S6459366 A JPS6459366 A JP S6459366A JP 62218242 A JP62218242 A JP 62218242A JP 21824287 A JP21824287 A JP 21824287A JP S6459366 A JPS6459366 A JP S6459366A
Authority
JP
Japan
Prior art keywords
developing
developer
carrying body
magnetic particle
image
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
JP62218242A
Other languages
Japanese (ja)
Other versions
JP2556525B2 (en
Inventor
Masao Yoshikawa
Tatsuya Kobayashi
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 JP62218242A priority Critical patent/JP2556525B2/en
Publication of JPS6459366A publication Critical patent/JPS6459366A/en
Application granted granted Critical
Publication of JP2556525B2 publication Critical patent/JP2556525B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To prevent the deterioration of a developing characteristic of the second developing means in an image forming device provided with plural developing devices, by providing a magnetic field generating means for attracting a magnetic particle which has adhered onto a developer carrying body, in the vicinity of the developer carrying body of the developing means for using a one-component developer. CONSTITUTION:The second developing means for developing the second latent image is provided so as to be opposed to an image carrying body which has carried a developed image of the first latent image, and the second latent image. Also, the titled device is provided with a magnetic field generating means 65 which is opposed to the second developer carrying surface of a carrying means, and also, provided on the upstream side from the second developer containing part 64 of the second developing means 6 and on the downstream side of a developing part 1, with regard to the moving direction of the second developer, and forms the attracting surface for attracting a magnetic particle of the first developer which has adhered to the carrying means. The magnetic particle which has adhered onto a developer carrying body 61 is attracted and caught by a magnetic field generating means 65, and a magnetic brush of the magnetic particle is formed on the developer carrying body 61. In such a way, it can be prevented that the development which has been developed already is put into disorder, and mixing of a toner is generated.
JP62218242A 1987-08-31 1987-08-31 Image forming apparatus having a plurality of developing devices Expired - Lifetime JP2556525B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62218242A JP2556525B2 (en) 1987-08-31 1987-08-31 Image forming apparatus having a plurality of developing devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62218242A JP2556525B2 (en) 1987-08-31 1987-08-31 Image forming apparatus having a plurality of developing devices

Publications (2)

Publication Number Publication Date
JPS6459366A true JPS6459366A (en) 1989-03-07
JP2556525B2 JP2556525B2 (en) 1996-11-20

Family

ID=16716819

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62218242A Expired - Lifetime JP2556525B2 (en) 1987-08-31 1987-08-31 Image forming apparatus having a plurality of developing devices

Country Status (1)

Country Link
JP (1) JP2556525B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001356601A (en) * 2000-05-18 2001-12-26 Nexpress Solutions Llc Developing station for printing device
JP2010256600A (en) * 2009-04-24 2010-11-11 Kyocera Mita Corp Developing device and image forming apparatus including the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108557A (en) * 1981-12-22 1983-06-28 Fujitsu Ltd Two-color recording device
JPS6360472A (en) * 1986-08-30 1988-03-16 Canon Inc electrophotographic equipment
JPS6398555U (en) * 1986-12-16 1988-06-25
JPS63140544U (en) * 1987-03-06 1988-09-16

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108557A (en) * 1981-12-22 1983-06-28 Fujitsu Ltd Two-color recording device
JPS6360472A (en) * 1986-08-30 1988-03-16 Canon Inc electrophotographic equipment
JPS6398555U (en) * 1986-12-16 1988-06-25
JPS63140544U (en) * 1987-03-06 1988-09-16

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001356601A (en) * 2000-05-18 2001-12-26 Nexpress Solutions Llc Developing station for printing device
JP2010256600A (en) * 2009-04-24 2010-11-11 Kyocera Mita Corp Developing device and image forming apparatus including the same

Also Published As

Publication number Publication date
JP2556525B2 (en) 1996-11-20

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term