JPS5486338A - Electrophotography - Google Patents

Electrophotography

Info

Publication number
JPS5486338A
JPS5486338A JP15462577A JP15462577A JPS5486338A JP S5486338 A JPS5486338 A JP S5486338A JP 15462577 A JP15462577 A JP 15462577A JP 15462577 A JP15462577 A JP 15462577A JP S5486338 A JPS5486338 A JP S5486338A
Authority
JP
Japan
Prior art keywords
latent image
plate
screen
ion current
modulation
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
JP15462577A
Other languages
Japanese (ja)
Inventor
Kazumoto Tanaka
Noritoshi Yoshida
Katsunobu Ohara
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 JP15462577A priority Critical patent/JPS5486338A/en
Publication of JPS5486338A publication Critical patent/JPS5486338A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE: To form a secondary latent image of high stability, by providing a shielding member between a photosensitive screen and a chargeable member, by stabilizing a primary latent image, and by setting application voltage in accordance with ion current flowing through this.
CONSTITUTION: A latent image forming means is arranged around drum-shaped screen 1 and movable shielding plate 26 is mounted along guide groove 26 between screen 1 facing modulation corona discharger 21, and insulating drum 22 forming a secondary latent image. In the first modulation of ion current, plate 25 is closed to stabilize a primary latent image, and plate 25 is moved to form a secondary latent image, and at the same time, the ion current flowing through plate 25 is taken out, a test image is modulated, deterioration of screen 1 is detected, and application voltage is adjusted, thereby permitting image quality to be stabilized from the first to the end in retention copying.
COPYRIGHT: (C)1979,JPO&Japio
JP15462577A 1977-12-22 1977-12-22 Electrophotography Pending JPS5486338A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15462577A JPS5486338A (en) 1977-12-22 1977-12-22 Electrophotography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15462577A JPS5486338A (en) 1977-12-22 1977-12-22 Electrophotography

Publications (1)

Publication Number Publication Date
JPS5486338A true JPS5486338A (en) 1979-07-09

Family

ID=15588264

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15462577A Pending JPS5486338A (en) 1977-12-22 1977-12-22 Electrophotography

Country Status (1)

Country Link
JP (1) JPS5486338A (en)

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