JPS5720745A - Method for partially magnetized electrophotography - Google Patents

Method for partially magnetized electrophotography

Info

Publication number
JPS5720745A
JPS5720745A JP9599780A JP9599780A JPS5720745A JP S5720745 A JPS5720745 A JP S5720745A JP 9599780 A JP9599780 A JP 9599780A JP 9599780 A JP9599780 A JP 9599780A JP S5720745 A JPS5720745 A JP S5720745A
Authority
JP
Japan
Prior art keywords
tonor
magnetic
picture
sensitive
image
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
JP9599780A
Other languages
Japanese (ja)
Inventor
Toshio Sakai
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.)
Ricoh Co Ltd
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 JP9599780A priority Critical patent/JPS5720745A/en
Publication of JPS5720745A publication Critical patent/JPS5720745A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/01—Electrographic processes using a charge pattern for multicoloured copies

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To utilize a part of monochromic visible image for the discrimination of truth/untruth by using a sensitive element with 2 photoconductive layers whose spectral sensitivity is different each other, developing a part of positive and negative electrostatic latent images with a magnetic tonor and magnetizing the image permanently after fixing. CONSTITUTION:While irradiating light of blue LB to a sensitive element 1 with a photoconductive layer 1B sensitive, for example, to blue light and a photoconductive layer 1C sensitive to red light, negative electricity is charged to a conductive base element 1A. Then the layers 1B and 1C are reversely charged each other by charging positive electricity in a dark room. After exposing an original with a black picture A and a red picture B, a part corresponding to the image A of the sensitive element is developed with black non-magnetic tonor Tn with positive charging and then developed with the black non-magnetic tonor Tm with negative charging. After transferring the tonor image to a recording element So and fixing it, the recording element So with a non-magnetic picture part InA and magnetic tonor picture part ImB is magnetized with magnets Mg1 and Mg2 to magnetize the picture ImB permanently.
JP9599780A 1980-07-14 1980-07-14 Method for partially magnetized electrophotography Pending JPS5720745A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9599780A JPS5720745A (en) 1980-07-14 1980-07-14 Method for partially magnetized electrophotography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9599780A JPS5720745A (en) 1980-07-14 1980-07-14 Method for partially magnetized electrophotography

Publications (1)

Publication Number Publication Date
JPS5720745A true JPS5720745A (en) 1982-02-03

Family

ID=14152736

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9599780A Pending JPS5720745A (en) 1980-07-14 1980-07-14 Method for partially magnetized electrophotography

Country Status (1)

Country Link
JP (1) JPS5720745A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05219511A (en) * 1984-07-31 1993-08-27 Rca Corp Camera device using color coding filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05219511A (en) * 1984-07-31 1993-08-27 Rca Corp Camera device using color coding filter
JP2706747B2 (en) * 1984-07-31 1998-01-28 アールシーエー コーポレーシヨン Camera device using color coding filter

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