JPS55137547A - Method and apparatus for forming color image - Google Patents

Method and apparatus for forming color image

Info

Publication number
JPS55137547A
JPS55137547A JP4620779A JP4620779A JPS55137547A JP S55137547 A JPS55137547 A JP S55137547A JP 4620779 A JP4620779 A JP 4620779A JP 4620779 A JP4620779 A JP 4620779A JP S55137547 A JPS55137547 A JP S55137547A
Authority
JP
Japan
Prior art keywords
alternating voltage
images
alternating
developing
supports
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
JP4620779A
Other languages
Japanese (ja)
Other versions
JPS6256505B2 (en
Inventor
Takao Aoki
Hidejiro Kadowaki
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 JP4620779A priority Critical patent/JPS55137547A/en
Publication of JPS55137547A publication Critical patent/JPS55137547A/en
Publication of JPS6256505B2 publication Critical patent/JPS6256505B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE: To improve the sharpness and gradation characteristic of the color images and simplify the apparatus by opposing developer supports and electrostatic image holder by maintaining a specified spacing and applying the alternating voltage of the specified frequency or less to the supports and developing the images.
CONSTITUTION: Electrostatic latent images are formed on the surface of a photosensitive drum 1 and the development is performed by the plural developing devices 16 which are maintained in a noncontact state of a fixed spacing from the drum 1 surface and supply respective color developers. Alternating voltage is applied to the sleeve 1612 of, e.g., yellow developing device 161 of the developing devices 16 by an alternating voltage source 28 and the DC voltage for performing selective development is applied by a Dc voltage source 31. The controlling of the alternating and direct current voltages to be applied is accomplished by a control circuit 26 and drive circuit 27.
COPYRIGHT: (C)1980,JPO&Japio
JP4620779A 1979-04-16 1979-04-16 Method and apparatus for forming color image Granted JPS55137547A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4620779A JPS55137547A (en) 1979-04-16 1979-04-16 Method and apparatus for forming color image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4620779A JPS55137547A (en) 1979-04-16 1979-04-16 Method and apparatus for forming color image

Publications (2)

Publication Number Publication Date
JPS55137547A true JPS55137547A (en) 1980-10-27
JPS6256505B2 JPS6256505B2 (en) 1987-11-26

Family

ID=12740630

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4620779A Granted JPS55137547A (en) 1979-04-16 1979-04-16 Method and apparatus for forming color image

Country Status (1)

Country Link
JP (1) JPS55137547A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60159768A (en) * 1984-01-30 1985-08-21 Konishiroku Photo Ind Co Ltd Image forming method
JPS60172062A (en) * 1984-02-17 1985-09-05 Japan Steel Works Ltd:The Electrophotographic device
JPS6126064A (en) * 1984-07-17 1986-02-05 Konishiroku Photo Ind Co Ltd Image forming device
JPS6165262A (en) * 1984-09-06 1986-04-03 Konishiroku Photo Ind Co Ltd Image forming method
JPS61183669A (en) * 1985-02-08 1986-08-16 Konishiroku Photo Ind Co Ltd Image forming device
JPH02167577A (en) * 1989-11-13 1990-06-27 Konica Corp Color image forming method
KR100423459B1 (en) * 2002-07-02 2004-03-18 삼성전자주식회사 color image forming apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893418A (en) * 1974-05-30 1975-07-08 Xerox Corp Xerographic developing apparatus
JPS50122240A (en) * 1973-12-28 1975-09-25
JPS5297745A (en) * 1976-02-12 1977-08-16 Canon Inc Forming means for color image
JPS5360230A (en) * 1976-11-10 1978-05-30 Fujitsu Ltd Multi-color print type electrostatic recorder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50122240A (en) * 1973-12-28 1975-09-25
US3893418A (en) * 1974-05-30 1975-07-08 Xerox Corp Xerographic developing apparatus
JPS5297745A (en) * 1976-02-12 1977-08-16 Canon Inc Forming means for color image
JPS5360230A (en) * 1976-11-10 1978-05-30 Fujitsu Ltd Multi-color print type electrostatic recorder

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60159768A (en) * 1984-01-30 1985-08-21 Konishiroku Photo Ind Co Ltd Image forming method
JPS60172062A (en) * 1984-02-17 1985-09-05 Japan Steel Works Ltd:The Electrophotographic device
JPS6126064A (en) * 1984-07-17 1986-02-05 Konishiroku Photo Ind Co Ltd Image forming device
JPH0464064B2 (en) * 1984-07-17 1992-10-13 Konishiroku Photo Ind
JPS6165262A (en) * 1984-09-06 1986-04-03 Konishiroku Photo Ind Co Ltd Image forming method
JPS61183669A (en) * 1985-02-08 1986-08-16 Konishiroku Photo Ind Co Ltd Image forming device
JPH0519704B2 (en) * 1985-02-08 1993-03-17 Konishiroku Photo Ind
JPH02167577A (en) * 1989-11-13 1990-06-27 Konica Corp Color image forming method
JPH0468630B2 (en) * 1989-11-13 1992-11-02 Konishiroku Photo Ind
KR100423459B1 (en) * 2002-07-02 2004-03-18 삼성전자주식회사 color image forming apparatus

Also Published As

Publication number Publication date
JPS6256505B2 (en) 1987-11-26

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