JPS54115235A - Electrostatic image developing method - Google Patents

Electrostatic image developing method

Info

Publication number
JPS54115235A
JPS54115235A JP2304678A JP2304678A JPS54115235A JP S54115235 A JPS54115235 A JP S54115235A JP 2304678 A JP2304678 A JP 2304678A JP 2304678 A JP2304678 A JP 2304678A JP S54115235 A JPS54115235 A JP S54115235A
Authority
JP
Japan
Prior art keywords
developer
layer
carrier
images
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.)
Pending
Application number
JP2304678A
Other languages
Japanese (ja)
Inventor
Yasuyuki Tamura
Junichiro Kanbe
Toshiharu Nakamura
Tsutomu Toyono
Toru Takahashi
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 JP2304678A priority Critical patent/JPS54115235A/en
Publication of JPS54115235A publication Critical patent/JPS54115235A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE: To enable developed images which are even in image density, are free from fog and do not cause out-of-focus at the circumferential edge parts of the images at all times to be obtained by disposing a developer layer whose volume resistivity is dependent of electric fields in proximity at a suitable distance from the surface of an image carrier.
CONSTITUTION: The developer D in a developer vessel 1 forms a developer layer D1 by passing through the opening 11 between a non-magnetic material cylindrical sleeve 2 which is fixedly disposed with a magnet roller 3 therein and rotates in the arrow (a) direction and the protruding part 4 of a holder 4. The layer D1 is defined to the developer layer D2 of about 100μ in thickness by a developer layer thickness defining plate 5. The image carrier 6 carrying electrostatic charged images rotates in the arrow (b) direction and the spacing between the carrier 6 and the sleeve 2 is maintained at 102 to 1100μ. As the layer D2 enters the field acting region based on the electrostatic charges of the surface of the carrier 6 or approaches thereto, the field intensity increases and therefore the volume resistivity of the developer D decreases and the developer particles bristle in ear form toward the image region and the extension development in which the ends of the ears contact is well accomplished.
COPYRIGHT: (C)1979,JPO&Japio
JP2304678A 1978-02-28 1978-02-28 Electrostatic image developing method Pending JPS54115235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2304678A JPS54115235A (en) 1978-02-28 1978-02-28 Electrostatic image developing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2304678A JPS54115235A (en) 1978-02-28 1978-02-28 Electrostatic image developing method

Publications (1)

Publication Number Publication Date
JPS54115235A true JPS54115235A (en) 1979-09-07

Family

ID=12099499

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2304678A Pending JPS54115235A (en) 1978-02-28 1978-02-28 Electrostatic image developing method

Country Status (1)

Country Link
JP (1) JPS54115235A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02167560A (en) * 1989-09-11 1990-06-27 Canon Inc Insulative magnetic toner

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS495035A (en) * 1972-03-16 1974-01-17
JPS5092137A (en) * 1973-12-14 1975-07-23
JPS50117432A (en) * 1974-02-16 1975-09-13

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS495035A (en) * 1972-03-16 1974-01-17
JPS5092137A (en) * 1973-12-14 1975-07-23
JPS50117432A (en) * 1974-02-16 1975-09-13

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02167560A (en) * 1989-09-11 1990-06-27 Canon Inc Insulative magnetic toner

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