JPS55100576A - Magnetic brush developing device in electronic copier - Google Patents

Magnetic brush developing device in electronic copier

Info

Publication number
JPS55100576A
JPS55100576A JP790879A JP790879A JPS55100576A JP S55100576 A JPS55100576 A JP S55100576A JP 790879 A JP790879 A JP 790879A JP 790879 A JP790879 A JP 790879A JP S55100576 A JPS55100576 A JP S55100576A
Authority
JP
Japan
Prior art keywords
magnetic field
nonmagnetic body
magnetic
powder developer
magnet
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
JP790879A
Other languages
Japanese (ja)
Inventor
Tsutomu Imai
Susumu Tatsumi
Yoshihiro Ogata
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 JP790879A priority Critical patent/JPS55100576A/en
Publication of JPS55100576A publication Critical patent/JPS55100576A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE: To intensify the magnetic field in the developing position and reduce in the eliminating position, and extend the life of powder developer, by fitting ferro- magnetic bodies to the magnets provided by the specified quantity on the nonmagnetic body sleeve.
CONSTITUTION: A ferro-magnetic body plate 12 is affixed to the right side face of a magnet M7 disposed in a rotatable nonmagnetic body sleeve 4a constituting a developing roller 4. In this constitution, a powder developer 1 is carried up to a magnet M6 located in the developing position while being attracted by the magnetic field of magnets M1WM7 to nonmagnetic body sleeves 3a, 4a, and forms a magnetic brush, and develops the electrostatic latent image on a photosensitive drum 5. At this time, the magnetic field on the right side of the magnet M7 is short-circuited, and the magnetic field on the nonmagnetic body sleeve 4a thereon becomes about zero, so that the powder developer 1 attracted and conveyed to this part drops and is separated by its own gravity and centrifugal force. Therefore, the powder developer 1 is easily separated from the nonmagnetic body sleeve 4a, without requiring strong force applied, and unreasonable force is not needed, so that the service life may be extended.
COPYRIGHT: (C)1980,JPO&Japio
JP790879A 1979-01-26 1979-01-26 Magnetic brush developing device in electronic copier Pending JPS55100576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP790879A JPS55100576A (en) 1979-01-26 1979-01-26 Magnetic brush developing device in electronic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP790879A JPS55100576A (en) 1979-01-26 1979-01-26 Magnetic brush developing device in electronic copier

Publications (1)

Publication Number Publication Date
JPS55100576A true JPS55100576A (en) 1980-07-31

Family

ID=11678642

Family Applications (1)

Application Number Title Priority Date Filing Date
JP790879A Pending JPS55100576A (en) 1979-01-26 1979-01-26 Magnetic brush developing device in electronic copier

Country Status (1)

Country Link
JP (1) JPS55100576A (en)

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