JPS5931969A - Two-color developing method - Google Patents

Two-color developing method

Info

Publication number
JPS5931969A
JPS5931969A JP57142349A JP14234982A JPS5931969A JP S5931969 A JPS5931969 A JP S5931969A JP 57142349 A JP57142349 A JP 57142349A JP 14234982 A JP14234982 A JP 14234982A JP S5931969 A JPS5931969 A JP S5931969A
Authority
JP
Japan
Prior art keywords
toner
potential
latent image
development
developing
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
JP57142349A
Other languages
Japanese (ja)
Other versions
JPH0374388B2 (en
Inventor
Kimio Nakahata
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 JP57142349A priority Critical patent/JPH0374388B2/ja
Publication of JPS5931969A publication Critical patent/JPS5931969A/en
Publication of JPH0374388B2 publication Critical patent/JPH0374388B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00Electrographic processes using a charge pattern
    • G03G13/01Electrographic processes using a charge pattern for multicoloured copies
    • G03G13/013Electrographic processes using a charge pattern for multicoloured copies characterised by the developing step, e.g. the properties of the colour developers

Abstract

PURPOSE:To prevent mixing of each color toner, by using a one-component type nonmagnetic developer made of a nonmagnetic toner for the first development, and a one-component type magnetic developer made of a magnetic toner for the second development, and carrying out jumping development for each development. CONSTITUTION:The first latent image to be printed with black color having positive potential with respect to an intermediate potential Vs, and the second latent image to be printed with red color having negative potential with respect to the potential Vs are formed on the surface of a photoreceptor 1. This is developed with a developing device 5 and then, with a developing device 6. The developing sleeves of the devices 5, 6 are subjected to a developing bias voltage corresponding to the potential Vs, and a negatively charged nonmagnetic black toner is used for the device 5 and a positively-charged red magnetic toner is used for the device 6. As a result on the surface of the photoreceptor, the black toner is attached to the first latent image with the device 5, and the red toner is attached to the second latent image with the device 6, and no toner is attached to the part having the intermediate potential Vs, thus forming a 2-color print on a transfer paper sheet 9.
JP57142349A 1982-08-17 1982-08-17 Expired - Lifetime JPH0374388B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57142349A JPH0374388B2 (en) 1982-08-17 1982-08-17

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57142349A JPH0374388B2 (en) 1982-08-17 1982-08-17

Publications (2)

Publication Number Publication Date
JPS5931969A true JPS5931969A (en) 1984-02-21
JPH0374388B2 JPH0374388B2 (en) 1991-11-26

Family

ID=15313296

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57142349A Expired - Lifetime JPH0374388B2 (en) 1982-08-17 1982-08-17

Country Status (1)

Country Link
JP (1) JPH0374388B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60159754A (en) * 1984-01-30 1985-08-21 Konishiroku Photo Ind Co Ltd Image forming method
JPS61100769A (en) * 1984-10-24 1986-05-19 Canon Inc Multi-color developing device
EP0331426A2 (en) * 1988-02-29 1989-09-06 Canon Kabushiki Kaisha Image forming method and image forming apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60159754A (en) * 1984-01-30 1985-08-21 Konishiroku Photo Ind Co Ltd Image forming method
JPS61100769A (en) * 1984-10-24 1986-05-19 Canon Inc Multi-color developing device
EP0331426A2 (en) * 1988-02-29 1989-09-06 Canon Kabushiki Kaisha Image forming method and image forming apparatus
US5009973A (en) * 1988-02-29 1991-04-23 Canon Kabushiki Kaisha Image forming method and image forming apparatus

Also Published As

Publication number Publication date
JPH0374388B2 (en) 1991-11-26

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