JPS55133058A - Electrophotographic developing method - Google Patents

Electrophotographic developing method

Info

Publication number
JPS55133058A
JPS55133058A JP4053279A JP4053279A JPS55133058A JP S55133058 A JPS55133058 A JP S55133058A JP 4053279 A JP4053279 A JP 4053279A JP 4053279 A JP4053279 A JP 4053279A JP S55133058 A JPS55133058 A JP S55133058A
Authority
JP
Japan
Prior art keywords
toner
latent image
photosensitive drum
low
frequency
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
Application number
JP4053279A
Other languages
Japanese (ja)
Other versions
JPS6341062B2 (en
Inventor
Masaharu Okubo
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 JP4053279A priority Critical patent/JPS55133058A/en
Publication of JPS55133058A publication Critical patent/JPS55133058A/en
Publication of JPS6341062B2 publication Critical patent/JPS6341062B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Developing For Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE: To perform the two-component-base toner development processing by which the sharp image free from ground fog and of high gradation charactersitic may be obtained, by applying the low-frequency alternating electric fields changing according to original densities within the specified range between an electrostatic latent image holder and developing electrodes.
CONSTITUTION: The latent image of a photosensitive drum 21 being an electrostatic latent image holder is developed by way of the nonmagnetic rotating sleeves 36B, 36A for two-component-base toner scooping up/cleaning and magnetic brush forming which form developing electrodes. These sleeves 36B, 36A are being applied with the low-frequency AC bias voltage of the frequencies or levels changing according to original densities or latent image potentials and of the frequency f of the range satisfying the conditions of formula (I) by an AC power source 45 and the toner is vibrated and moved by the low-frequency alternating electric field between the sleeve 36A and drum 21 so that the toner corresponding to the densities deposits on the image part, and the deposition of the toner on the nonimage part is prevented. (V denotes the peripheral speed of the photosensitive drum and d the distance of the contact portion of the photosensitive drum and developer).
COPYRIGHT: (C)1980,JPO&Japio
JP4053279A 1979-04-04 1979-04-04 Electrophotographic developing method Granted JPS55133058A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4053279A JPS55133058A (en) 1979-04-04 1979-04-04 Electrophotographic developing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4053279A JPS55133058A (en) 1979-04-04 1979-04-04 Electrophotographic developing method

Publications (2)

Publication Number Publication Date
JPS55133058A true JPS55133058A (en) 1980-10-16
JPS6341062B2 JPS6341062B2 (en) 1988-08-15

Family

ID=12583068

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4053279A Granted JPS55133058A (en) 1979-04-04 1979-04-04 Electrophotographic developing method

Country Status (1)

Country Link
JP (1) JPS55133058A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6073647A (en) * 1983-09-30 1985-04-25 Canon Inc Image forming method
JPS60131575A (en) * 1983-12-20 1985-07-13 Konishiroku Photo Ind Co Ltd Adjusting method of toner density
JPS60179766A (en) * 1984-02-27 1985-09-13 Konishiroku Photo Ind Co Ltd Developing device
JPS61208062A (en) * 1985-03-11 1986-09-16 Konishiroku Photo Ind Co Ltd Multicolor image forming device
JPS63146065A (en) * 1986-12-10 1988-06-18 Canon Inc Developing device
JPH02157771A (en) * 1988-12-09 1990-06-18 Fuji Xerox Co Ltd Picture quality controller for picture forming device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50125738A (en) * 1974-03-20 1975-10-03
JPS519460A (en) * 1974-07-12 1976-01-26 Ricoh Kk
JPS533337A (en) * 1976-06-28 1978-01-13 Eastman Kodak Co Method of developing electrophotographic image by causing dielectric breakdown in developer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50125738A (en) * 1974-03-20 1975-10-03
JPS519460A (en) * 1974-07-12 1976-01-26 Ricoh Kk
JPS533337A (en) * 1976-06-28 1978-01-13 Eastman Kodak Co Method of developing electrophotographic image by causing dielectric breakdown in developer

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6073647A (en) * 1983-09-30 1985-04-25 Canon Inc Image forming method
JPH0568693B2 (en) * 1983-09-30 1993-09-29 Canon Kk
JPS60131575A (en) * 1983-12-20 1985-07-13 Konishiroku Photo Ind Co Ltd Adjusting method of toner density
JPH0462384B2 (en) * 1983-12-20 1992-10-06 Konishiroku Photo Ind
JPS60179766A (en) * 1984-02-27 1985-09-13 Konishiroku Photo Ind Co Ltd Developing device
JPH0444752B2 (en) * 1984-02-27 1992-07-22 Konishiroku Photo Ind
JPS61208062A (en) * 1985-03-11 1986-09-16 Konishiroku Photo Ind Co Ltd Multicolor image forming device
JPS63146065A (en) * 1986-12-10 1988-06-18 Canon Inc Developing device
JPH02157771A (en) * 1988-12-09 1990-06-18 Fuji Xerox Co Ltd Picture quality controller for picture forming device

Also Published As

Publication number Publication date
JPS6341062B2 (en) 1988-08-15

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