JPS55140858A - Developing unit - Google Patents

Developing unit

Info

Publication number
JPS55140858A
JPS55140858A JP4871879A JP4871879A JPS55140858A JP S55140858 A JPS55140858 A JP S55140858A JP 4871879 A JP4871879 A JP 4871879A JP 4871879 A JP4871879 A JP 4871879A JP S55140858 A JPS55140858 A JP S55140858A
Authority
JP
Japan
Prior art keywords
toner
peaks
support
height
latent 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
JP4871879A
Other languages
Japanese (ja)
Other versions
JPH0128382B2 (en
Inventor
Yasuyuki Tamura
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 JP4871879A priority Critical patent/JPS55140858A/en
Priority to US06/138,909 priority patent/US4377332A/en
Priority to DE19803014849 priority patent/DE3014849A1/en
Publication of JPS55140858A publication Critical patent/JPS55140858A/en
Publication of JPH0128382B2 publication Critical patent/JPH0128382B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To enable an even toner layer to be formed stably on a developer support, by roughening the surface of the developer support and specifying the height of peaks by rendering it 1/4-3 times as much as the mean particle diameter of the toner to be used or doing the like. CONSTITUTION:In a developing unit using a one-component type magnetic toner, coating the toner on a developer support having magnets in the inside, and developing a latent image by allowing the toner layer to face the latent image bearing material, peaks and valleys of about several mu are formed on the surface of developer support 2 to stabilize a toner layer, the height of the peaks is made 1/4-3 times as much as the mean diameter of the toner to be used, the intervals of the peaks are made larger than the height, and smaller than the distance between support 2 and the latent image bearing material, thus permitting the toner to be mechanically loosened by slide contact of the roughened surface of support 2 under blade 1 and uniform coating to be made.
JP4871879A 1979-04-20 1979-04-20 Developing unit Granted JPS55140858A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP4871879A JPS55140858A (en) 1979-04-20 1979-04-20 Developing unit
US06/138,909 US4377332A (en) 1979-04-20 1980-04-10 Developing device
DE19803014849 DE3014849A1 (en) 1979-04-20 1980-04-17 DEVELOPMENT DEVICE AND METHOD FOR PRODUCING THE SAME

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4871879A JPS55140858A (en) 1979-04-20 1979-04-20 Developing unit

Publications (2)

Publication Number Publication Date
JPS55140858A true JPS55140858A (en) 1980-11-04
JPH0128382B2 JPH0128382B2 (en) 1989-06-02

Family

ID=12811068

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4871879A Granted JPS55140858A (en) 1979-04-20 1979-04-20 Developing unit

Country Status (1)

Country Link
JP (1) JPS55140858A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5786869A (en) * 1980-11-20 1982-05-31 Canon Inc Developing device
JPS5789781A (en) * 1980-11-26 1982-06-04 Canon Inc Developing device
JPS57100455A (en) * 1980-12-15 1982-06-22 Canon Inc Developing device
JPS57158864A (en) * 1981-02-24 1982-09-30 Olivetti & Co Spa Electrophotographic copying machine
JPS58159546U (en) * 1982-04-19 1983-10-24 コニカ株式会社 Electrostatic image developing device
JPS592065A (en) * 1982-06-28 1984-01-07 Canon Inc Developing device
JPS593459A (en) * 1982-06-29 1984-01-10 Canon Inc Developing device
JPS59189374A (en) * 1983-04-12 1984-10-26 Canon Inc Developing method
JPS61250200A (en) * 1985-04-26 1986-11-07 Matsushita Electric Ind Co Ltd Production of developer holding member
JPH0336562A (en) * 1989-07-03 1991-02-18 Canon Inc Developing device
JPH0336563A (en) * 1989-07-03 1991-02-18 Canon Inc Developing device
JPH0336564A (en) * 1989-07-03 1991-02-18 Canon Inc Developing device
JP2006139075A (en) * 2004-11-12 2006-06-01 Ricoh Co Ltd Developer carrier, and developing device, process cartridge and image forming apparatus using the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5443037A (en) * 1977-09-10 1979-04-05 Canon Inc Electrostatic image developing device
JPS5443038A (en) * 1977-09-10 1979-04-05 Canon Inc Electrostatic image developing device
JPS5449141A (en) * 1977-09-27 1979-04-18 Ricoh Co Ltd Non-impact recording method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5443037A (en) * 1977-09-10 1979-04-05 Canon Inc Electrostatic image developing device
JPS5443038A (en) * 1977-09-10 1979-04-05 Canon Inc Electrostatic image developing device
JPS5449141A (en) * 1977-09-27 1979-04-18 Ricoh Co Ltd Non-impact recording method

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5786869A (en) * 1980-11-20 1982-05-31 Canon Inc Developing device
JPH0335664B2 (en) * 1980-11-20 1991-05-29 Canon Kk
JPS5789781A (en) * 1980-11-26 1982-06-04 Canon Inc Developing device
JPS57100455A (en) * 1980-12-15 1982-06-22 Canon Inc Developing device
JPH0132982B2 (en) * 1980-12-15 1989-07-11 Canon Kk
JPS57158864A (en) * 1981-02-24 1982-09-30 Olivetti & Co Spa Electrophotographic copying machine
JPH0322995B2 (en) * 1981-02-24 1991-03-28 Ingu* Chii Oribetsutei E Co Spa
JPS58159546U (en) * 1982-04-19 1983-10-24 コニカ株式会社 Electrostatic image developing device
JPH0452753Y2 (en) * 1982-04-19 1992-12-11
JPS592065A (en) * 1982-06-28 1984-01-07 Canon Inc Developing device
JPH0377512B2 (en) * 1982-06-28 1991-12-10 Canon Kk
JPS593459A (en) * 1982-06-29 1984-01-10 Canon Inc Developing device
JPS59189374A (en) * 1983-04-12 1984-10-26 Canon Inc Developing method
JPS61250200A (en) * 1985-04-26 1986-11-07 Matsushita Electric Ind Co Ltd Production of developer holding member
JPH0336564A (en) * 1989-07-03 1991-02-18 Canon Inc Developing device
JPH0336563A (en) * 1989-07-03 1991-02-18 Canon Inc Developing device
JPH0336562A (en) * 1989-07-03 1991-02-18 Canon Inc Developing device
JP2006139075A (en) * 2004-11-12 2006-06-01 Ricoh Co Ltd Developer carrier, and developing device, process cartridge and image forming apparatus using the same

Also Published As

Publication number Publication date
JPH0128382B2 (en) 1989-06-02

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