JPS5476236A - Developing device - Google Patents

Developing device

Info

Publication number
JPS5476236A
JPS5476236A JP14357377A JP14357377A JPS5476236A JP S5476236 A JPS5476236 A JP S5476236A JP 14357377 A JP14357377 A JP 14357377A JP 14357377 A JP14357377 A JP 14357377A JP S5476236 A JPS5476236 A JP S5476236A
Authority
JP
Japan
Prior art keywords
sleeve
development
poles
magnetic
carrier
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
JP14357377A
Other languages
Japanese (ja)
Inventor
Shuji Murakawa
Toshiro Kasamura
Yujiro Ando
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 JP14357377A priority Critical patent/JPS5476236A/en
Publication of JPS5476236A publication Critical patent/JPS5476236A/en
Pending legal-status Critical Current

Links

Landscapes

  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To form a sharp image of rich gradation in high speed, by using 2 sets of devices in the magnetic brush developer of a static latent image and conducting usual sleeve development in the first set and powder clound development in the second set. CONSTITUTION:Two nonmagnetic rotary sleeves 22A, 22B are arranged a little apart from each other in the developing station of static image carrier 1 so as to ratate in the arrow direction. Magentic means for sleeve 22A are formed as a magnetic roller and magnetized poles N2, S2, N2 are arranged each separated at an equal angle near the surface of the roller and most adjacent to the surface of carrier 1. Magnetic means for sleeve 22B are formed as a 4 pole magnetized magnetic roller and poles N2 and S1 are used for scooping and carrying developing powder and poles S3 and S4 are arranged each separated at a predetermined angle theta in the direction reverse to each other from the point most adjacent to the surface of carrier 1 from the magnetic roller. The conventional sleeve development is made in the first development station consisting of sleeve 22a and means 23A and powder cloud development is made in the second development station consisting of sleeve 22B and means 23B.
JP14357377A 1977-11-30 1977-11-30 Developing device Pending JPS5476236A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14357377A JPS5476236A (en) 1977-11-30 1977-11-30 Developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14357377A JPS5476236A (en) 1977-11-30 1977-11-30 Developing device

Publications (1)

Publication Number Publication Date
JPS5476236A true JPS5476236A (en) 1979-06-18

Family

ID=15341878

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14357377A Pending JPS5476236A (en) 1977-11-30 1977-11-30 Developing device

Country Status (1)

Country Link
JP (1) JPS5476236A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01319070A (en) * 1988-06-17 1989-12-25 Minolta Camera Co Ltd Developing device
JPH01321459A (en) * 1988-06-23 1989-12-27 Minolta Camera Co Ltd Developing device
JPH02105185A (en) * 1988-10-14 1990-04-17 Ricoh Co Ltd Multi-stage developing device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01319070A (en) * 1988-06-17 1989-12-25 Minolta Camera Co Ltd Developing device
JPH01321459A (en) * 1988-06-23 1989-12-27 Minolta Camera Co Ltd Developing device
JPH02105185A (en) * 1988-10-14 1990-04-17 Ricoh Co Ltd Multi-stage developing device

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