JPS55151671A - Developing device - Google Patents

Developing device

Info

Publication number
JPS55151671A
JPS55151671A JP6078179A JP6078179A JPS55151671A JP S55151671 A JPS55151671 A JP S55151671A JP 6078179 A JP6078179 A JP 6078179A JP 6078179 A JP6078179 A JP 6078179A JP S55151671 A JPS55151671 A JP S55151671A
Authority
JP
Japan
Prior art keywords
magnetic
doctor blade
toners
developer
supporting means
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
JP6078179A
Other languages
Japanese (ja)
Inventor
Kozo Arao
Junichiro Kanbe
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 JP6078179A priority Critical patent/JPS55151671A/en
Priority to DE19803008862 priority patent/DE3008862A1/en
Publication of JPS55151671A publication Critical patent/JPS55151671A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE: To obtain the good-quality sensible images of high image sharpness by making the surface magnetic flux density on the developer carrier surface of the magnetic poles opposing to a thickness defining member 750 gauss or more by the use of the specific magnetic developer.
CONSTITUTION: A developer supporting means 11 is provided in opposition to a photosensitive drum 4 and a stationary magnet 12 is provided therein. The thickness of the magnetic toners 15 which contain 15W50wt% of magnetic material and are 5μ or more in mean grain size is defined by a doctor blade 13 and the magnetic toners 15 become continuous in yarn-form along the magnetic lines of force in the magnetic field, the density whereof is considerably lower than that in an ordinary state. If in this way they are defined by the doctor blade 13 in the place where the magnetic field acts, they may be made considerably thin. Since there is no need for making the spacing between the doctor blade 13 and toner supporting means 11 extremely small, the clogging of the toners is prevented.
COPYRIGHT: (C)1980,JPO&Japio
JP6078179A 1979-03-09 1979-05-17 Developing device Pending JPS55151671A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP6078179A JPS55151671A (en) 1979-05-17 1979-05-17 Developing device
DE19803008862 DE3008862A1 (en) 1979-03-09 1980-03-07 Toner developer for photocopier - has magnetic pick=up and magnetic scraper to limit thickness of layer applied to carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6078179A JPS55151671A (en) 1979-05-17 1979-05-17 Developing device

Publications (1)

Publication Number Publication Date
JPS55151671A true JPS55151671A (en) 1980-11-26

Family

ID=13152167

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6078179A Pending JPS55151671A (en) 1979-03-09 1979-05-17 Developing device

Country Status (1)

Country Link
JP (1) JPS55151671A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6073659A (en) * 1983-09-30 1985-04-25 Ricoh Co Ltd Controller for layer thickness of magnetic particle
JPS61189583A (en) * 1985-02-19 1986-08-23 Kyocera Corp Forming device for toner layer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6073659A (en) * 1983-09-30 1985-04-25 Ricoh Co Ltd Controller for layer thickness of magnetic particle
JPH0535430B2 (en) * 1983-09-30 1993-05-26 Ricoh Kk
JPS61189583A (en) * 1985-02-19 1986-08-23 Kyocera Corp Forming device for toner layer

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