JPS61189564A - Color electronic copying method - Google Patents

Color electronic copying method

Info

Publication number
JPS61189564A
JPS61189564A JP3108985A JP3108985A JPS61189564A JP S61189564 A JPS61189564 A JP S61189564A JP 3108985 A JP3108985 A JP 3108985A JP 3108985 A JP3108985 A JP 3108985A JP S61189564 A JPS61189564 A JP S61189564A
Authority
JP
Japan
Prior art keywords
color
latent image
pattern
halftone pattern
document
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
JP3108985A
Other languages
Japanese (ja)
Inventor
Toshio Sakai
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 JP3108985A priority Critical patent/JPS61189564A/en
Publication of JPS61189564A publication Critical patent/JPS61189564A/en
Granted 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
    • G03G15/0115Details of unit for exposing and forming a half-tone image

Abstract

PURPOSE:To reproduce document information in pure black and to reproduce pattern information with excellent gradations by turning on a light emitting diode in color B during the exposure of a halftone pattern and in color A during the erasure of a latent image part. CONSTITUTION:Light emitting diodes (LED) constituting an array uses LEDs which illuminate in different colors A and B and a filter has a transmission part of B-color light distributed according to a halftone pattern and allows A-color light to pass through its entire surface. When the halftone pattern is exposed, LEDs illuminate in the color B and when the latent image part is erased, the LEDs illuminate in the color A. There are a pattern part latent image and a document part latent image as color separation latent images formed firstly on a photosensitive body 22. Those electrostatic latent images are passed under a halftone pattern generator 28, but the document part latent image is erased at this time and the pattern part latent image is exposed to the halftone pattern. Transfer paper as a recording sheet, on the other hand, is held on the peripheral surface of a transfer drum at proper timing and sent to a transfer part, so that the image is transferred.
JP3108985A 1985-02-19 1985-02-19 Color electronic copying method Granted JPS61189564A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3108985A JPS61189564A (en) 1985-02-19 1985-02-19 Color electronic copying method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3108985A JPS61189564A (en) 1985-02-19 1985-02-19 Color electronic copying method

Publications (1)

Publication Number Publication Date
JPS61189564A true JPS61189564A (en) 1986-08-23

Family

ID=12321677

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3108985A Granted JPS61189564A (en) 1985-02-19 1985-02-19 Color electronic copying method

Country Status (1)

Country Link
JP (1) JPS61189564A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008032790A1 (en) 2008-07-11 2010-01-21 OCé PRINTING SYSTEMS GMBH Device for developing charge images by e.g. electrophotographic printing device, has potential element arranged before developing region, where electric field is produced by alternating voltage at element end that is turned towards region

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008032790A1 (en) 2008-07-11 2010-01-21 OCé PRINTING SYSTEMS GMBH Device for developing charge images by e.g. electrophotographic printing device, has potential element arranged before developing region, where electric field is produced by alternating voltage at element end that is turned towards region

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