JPS55140858A - Developing unit - Google Patents
Developing unitInfo
- 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
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.
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)
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)
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 |
-
1979
- 1979-04-20 JP JP4871879A patent/JPS55140858A/en active Granted
Patent Citations (3)
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)
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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