JPS5590982A - Magnetic brush developing device - Google Patents

Magnetic brush developing device

Info

Publication number
JPS5590982A
JPS5590982A JP16527178A JP16527178A JPS5590982A JP S5590982 A JPS5590982 A JP S5590982A JP 16527178 A JP16527178 A JP 16527178A JP 16527178 A JP16527178 A JP 16527178A JP S5590982 A JPS5590982 A JP S5590982A
Authority
JP
Japan
Prior art keywords
grooves
magnet
arc
magnetic
toner
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
JP16527178A
Other languages
Japanese (ja)
Inventor
Shigekazu Enoki
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP16527178A priority Critical patent/JPS5590982A/en
Publication of JPS5590982A publication Critical patent/JPS5590982A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE: To enhance image density and obviate the occurrence of uneven development by providing notches to the magnetic pole portion of the magnet disposed in the developing position diagonally to its lengtwise direction and letting toner pass at least once through the notches.
CONSTITUTION: The surface 11 of a magnet 10 opposing to the developing part is formed to the arc form having the curvature equal to the arc of a sleeve-form non-magnetic carrier and streak grooves 12 being multiple notch parts are pierced on this surface 11, parallel by leaving a fixed spacing, diagonally to the lengthwise direction of said magnet body. The streak grooves 12 are pierced to a fixed depth, hence the bottom parts 11a of the grooves assume arc parallel to the surface 11. The toner moves in the X-X line direction with respect to the magnet and in said direction there are protrusions 13 on both sides of the grooves 12 and therefore this turns out that two magnetic poles are provided, thus the occurrence of blocking phenomenon in the toner is obviated by the wide contact width of the magnetic brush with the latent image carrier and the grooves running in the diagonal direction.
COPYRIGHT: (C)1980,JPO&Japio
JP16527178A 1978-12-29 1978-12-29 Magnetic brush developing device Pending JPS5590982A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16527178A JPS5590982A (en) 1978-12-29 1978-12-29 Magnetic brush developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16527178A JPS5590982A (en) 1978-12-29 1978-12-29 Magnetic brush developing device

Publications (1)

Publication Number Publication Date
JPS5590982A true JPS5590982A (en) 1980-07-10

Family

ID=15809152

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16527178A Pending JPS5590982A (en) 1978-12-29 1978-12-29 Magnetic brush developing device

Country Status (1)

Country Link
JP (1) JPS5590982A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5724972A (en) * 1980-07-22 1982-02-09 Fuji Xerox Co Ltd Magnetic roll for electronic copying machine
JPS57142666A (en) * 1981-02-27 1982-09-03 Hitachi Metals Ltd Magnet roll
JPS6123180A (en) * 1984-07-12 1986-01-31 Fuji Xerox Co Ltd Developing device of electrophotographic copying machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5724972A (en) * 1980-07-22 1982-02-09 Fuji Xerox Co Ltd Magnetic roll for electronic copying machine
JPS57142666A (en) * 1981-02-27 1982-09-03 Hitachi Metals Ltd Magnet roll
JPS6123180A (en) * 1984-07-12 1986-01-31 Fuji Xerox Co Ltd Developing device of electrophotographic copying machine

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