JPS61212857A - Two-color development copying machine - Google Patents

Two-color development copying machine

Info

Publication number
JPS61212857A
JPS61212857A JP5242385A JP5242385A JPS61212857A JP S61212857 A JPS61212857 A JP S61212857A JP 5242385 A JP5242385 A JP 5242385A JP 5242385 A JP5242385 A JP 5242385A JP S61212857 A JPS61212857 A JP S61212857A
Authority
JP
Japan
Prior art keywords
photosensitive
image
blue
black
exposure
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
JP5242385A
Other languages
Japanese (ja)
Inventor
Makoto Kobu
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP5242385A priority Critical patent/JPS61212857A/en
Publication of JPS61212857A publication Critical patent/JPS61212857A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/01Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0105Details of unit
    • G03G15/011Details of unit for exposing

Abstract

PURPOSE:To perform two-color development with a normal photosensitive body by using a positive light image obtained by an image processing element to write a black pattern and a negative light image by said element to write a blue light image, and aligning both light images with each other on the photosensitive body. CONSTITUTION:Two developing devices 28 and 29 of blue and black are provided along the photosensitive body 27 and toner images of two colors formed on the photosensitive body 27 are transferred to the same transfer paper 31 one over the other. In this copying machine, a BSO element 1 is positioned where original luminous flux from an image forming lens 5 forms an image and a light image read out of the element 1 travels to an exposure position on the photosensitive body 27. Then, when a two-color copy of blue and black is taken, the black part of an original is recorded and then the light image is written on the photosensitive body to form a toner image; and the blue part is written on the photosensitive body by irradiating both light images so that the negative image from the element 1 is aligned with each other on the photosensitive body 27. When the back part is written on the element 1, an exposure lamp 21 is turned on and an exposure optical system is moved for scanning. When the blue part toner image is formed, the exposure optical system is moved for scanning and when the black part toner image is formed, the exposure lamp is turned off and a scan for exposure is not made.
JP5242385A 1985-03-18 1985-03-18 Two-color development copying machine Pending JPS61212857A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5242385A JPS61212857A (en) 1985-03-18 1985-03-18 Two-color development copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5242385A JPS61212857A (en) 1985-03-18 1985-03-18 Two-color development copying machine

Publications (1)

Publication Number Publication Date
JPS61212857A true JPS61212857A (en) 1986-09-20

Family

ID=12914369

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5242385A Pending JPS61212857A (en) 1985-03-18 1985-03-18 Two-color development copying machine

Country Status (1)

Country Link
JP (1) JPS61212857A (en)

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