image forming device

Abstract

Abstract PURPOSE:To prevent image change during retention copying by providing a rotating body with a latent image forming means, a memory means for detecting and processing the electric state of the body and retaining it for time of one rotation of the body, and a memory means for again detecting it after one rotation. CONSTITUTION:When a screen 29 is used in a grounded state, and a modulating corona ion current is generated from a corona discharger 26, a part of it flows to a shielding plate 28, another part flows to the screen 29, and the rest passes through the screen 29. This ion current flows to the recording medium 30 to which voltage is applied from a bias power supply between the screen 29 and the medium 30, and a secondary electrostatic latent image is formed on the surface of the medium 30. The current flowing through the resistor 35 becomes only the amt. of current passing through the screen 29. A current acting for actually forming the secondary electrostatic latent image can be measured by measuring the potential of the resistor 35. As a result, image change during retention copying actuating only a step following the formation of the secondary electrostatic latent image can be prevented.

Inventors

• 👤 Masaharu Okubo
• 👤 大久保　正晴
• 👤 Yujiro Ando
• 👤 祐二郎 安藤
• 👤 Toshio Honma
• 👤 本間　利夫
• 👤 Shuji Murakawa
• 👤 村川　修司
• 👤 Katsumi Murakami
• 👤 村上　克已
• 👤 Kyoshi Furuichi
• 👤 古市　京士

Bibliographic Details