JPS54131939A - Electrophotography - Google Patents

Electrophotography

Info

Publication number
JPS54131939A
JPS54131939A JP7015678A JP7015678A JPS54131939A JP S54131939 A JPS54131939 A JP S54131939A JP 7015678 A JP7015678 A JP 7015678A JP 7015678 A JP7015678 A JP 7015678A JP S54131939 A JPS54131939 A JP S54131939A
Authority
JP
Japan
Prior art keywords
positive
layer
corona
image
negative
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
JP7015678A
Other languages
Japanese (ja)
Other versions
JPS5719786B2 (en
Inventor
Katsunobu Ohara
Keiji Tanaka
Yujiro Ando
Inao Moriyama
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.)
Canon Inc
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 JP7015678A priority Critical patent/JPS54131939A/en
Publication of JPS54131939A publication Critical patent/JPS54131939A/en
Publication of JPS5719786B2 publication Critical patent/JPS5719786B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Electrophotography Using Other Than Carlson'S Method (AREA)

Abstract

PURPOSE:To facilitate setting of formation of a positive image similar to an original or a negative image, by forming a static latent image consisting of positive and negative surface voltages and by applying positive or negative corona discharges for modulation to this image. CONSTITUTION:Photosensitive screen 4 having photoconductive layer 2 and insulating layer 3 on conductive screen 1 is charged uniformly and negatively on layer 3 by pre-charging. Subsequent exposure to light 12 from original 11 and AC corona discharge render positive the surface voltage of light area L of layer 3. Following uniform whole surface exposure forms a static latent image with changed voltage on dark area D of layer 3. Succeeding application of modulation corona discharge across corona wire 8 and conductive substrate 5 of recording material 7 through voltage sources 9 and 10 connected to screen 1 hinders passing of positive corona ions in virtue of an electric field shown by full lines alpha on light area L. On the other hand, on dark area D, the electric field shown by full lines beta permits the corona ions to effectively arrive at insulating layer 6 of material 7 in a state of the latent image slightly erased.
JP7015678A 1978-06-09 1978-06-09 Electrophotography Granted JPS54131939A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7015678A JPS54131939A (en) 1978-06-09 1978-06-09 Electrophotography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7015678A JPS54131939A (en) 1978-06-09 1978-06-09 Electrophotography

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP3952378A Division JPS53134436A (en) 1978-04-04 1978-04-04 Zerography

Publications (2)

Publication Number Publication Date
JPS54131939A true JPS54131939A (en) 1979-10-13
JPS5719786B2 JPS5719786B2 (en) 1982-04-24

Family

ID=13423420

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7015678A Granted JPS54131939A (en) 1978-06-09 1978-06-09 Electrophotography

Country Status (1)

Country Link
JP (1) JPS54131939A (en)

Also Published As

Publication number Publication date
JPS5719786B2 (en) 1982-04-24

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