[go: up one dir, main page]

JPS54112634A - Electrophotographic process and device - Google Patents

Electrophotographic process and device

Info

Publication number
JPS54112634A
JPS54112634A JP1905478A JP1905478A JPS54112634A JP S54112634 A JPS54112634 A JP S54112634A JP 1905478 A JP1905478 A JP 1905478A JP 1905478 A JP1905478 A JP 1905478A JP S54112634 A JPS54112634 A JP S54112634A
Authority
JP
Japan
Prior art keywords
red
charger
light
transfer
slit
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
JP1905478A
Other languages
Japanese (ja)
Inventor
Fuyuhiko Matsumoto
Kunihiko Ikeda
Shuichi Karasawa
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 JP1905478A priority Critical patent/JPS54112634A/en
Publication of JPS54112634A publication Critical patent/JPS54112634A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To carry out 2-color development in one simplified process by using a specified photoreceptor made by laminating 2 photoconductive layers on a transparent conductive substrate.
CONSTITUTION: A laminated photoreceptor made by overlaying first photoconductive layer 1 having white light sensitivity and second photoconductive layer 2 having sensitivity to light of colors excluding red on transparent conductive substrate 3 is exposed to red light through red filter 23 and first slit 21 from light source lamp 1 in hollow shaft 16, and at the same time, undergoes primary charging with primary charger 4 followed by secondary charging with secondary charger 5 of reverse polarity. Then, it is imagewise exposed 6 by a 2-color original II, resulting in forming -, about 0, and + static latent images in surface voltage in the red, white, and black regions, respectively. These latent images are developed with positively charged red toner in first developing device 7 and with negatively charged black toner in second developing device 8. The toners are uniformly negatively charged with charger 9 prior to transfer, then irradiated by white light through second slit 22, and at the same time, transferred to transfer paper 10 with transfer charger 11.
COPYRIGHT: (C)1979,JPO&Japio
JP1905478A 1978-02-23 1978-02-23 Electrophotographic process and device Pending JPS54112634A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1905478A JPS54112634A (en) 1978-02-23 1978-02-23 Electrophotographic process and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1905478A JPS54112634A (en) 1978-02-23 1978-02-23 Electrophotographic process and device

Publications (1)

Publication Number Publication Date
JPS54112634A true JPS54112634A (en) 1979-09-03

Family

ID=11988707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1905478A Pending JPS54112634A (en) 1978-02-23 1978-02-23 Electrophotographic process and device

Country Status (1)

Country Link
JP (1) JPS54112634A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59228683A (en) * 1983-06-10 1984-12-22 Fuji Xerox Co Ltd Electrophotographic copying machine
JPS60237467A (en) * 1984-05-09 1985-11-26 Canon Inc Image formation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59228683A (en) * 1983-06-10 1984-12-22 Fuji Xerox Co Ltd Electrophotographic copying machine
JPS60237467A (en) * 1984-05-09 1985-11-26 Canon Inc Image formation

Similar Documents

Publication Publication Date Title
JPS57147655A (en) Bicolor developing method
JPS5532050A (en) Composite-copying method of information image
JPS5612650A (en) Two-color electrophotographic developing method and its printing method
JPS6011854A (en) Two color image forming method
JPS559557A (en) Photoreceptor for electrophotography
JPS5782848A (en) Electrophotographing method
JPS54112634A (en) Electrophotographic process and device
JPS5782850A (en) Electrophotographic method
JPS5576360A (en) Dry development system
JPS5687058A (en) Two-color electrophotographic recorder
JPS54137345A (en) Development for dichronic zerography
JPS5782849A (en) Electrophotographing method
JPS5622440A (en) Electrophotographic composite photoreceptor
JPS5529845A (en) Photoreceptor for electrophotography
JPS5412739A (en) Two color electrophotographic copying method
JPS5565960A (en) Electrophotographic receptor
JPS54141129A (en) Two-color electrophotographic copying method
JPS55111952A (en) Electrophotographic method
JPS5476160A (en) Photoreceptor for electrophotography
JPS5573062A (en) Two color electrophotographic copying method
JPS5774766A (en) Electrophotographic device
JPS54155047A (en) Electrophotographic photoreceptor
JPS55117155A (en) Copying method
JPS54143139A (en) Copying method for dichroic zerography
JPS5515151A (en) Electrophotographic method