Patent Number: 6,296,347

Title: Direct electrostatic recording apparatus with modified electrode shape for preventing uneven image density

Abstract: A direct recording apparatus of the invention comprises a recording roller 30 for transferring charged toner particles 38, a back electrode 44 opposed to the recording roller 30 to attract the toner particles 38, a PC board 50 disposed between the recording roller 30 and the back electrode 44 to control the toner particles 38 to jump or not to jump toward the back electrode 44. The PC board 50 of the invention is provided with a plurality of apertures 56 through which the toner particles 38 can pass. The periphery of the aperture 56 is provided with an electrode 68 to allow the toner particles 38 on the recording roller 30 to jump depending on electric signals. The electrode 68 has a shape wherein a part of a ring shape surrounding the aperture 56 is cut off in a direction of a rotation axis of the recording roller 30. This configuration can eliminate unevenness in image density without rotating the recording roller at high speed.

Inventors: Shibata; Yoshifumi (Toyokawa, JP)

Assignee: Minolta Co., Ltd.

International Classification: B41J 2/41 (20060101); B41J 2/415 (20060101); B41J 002/06 ()

Expiration Date: 10/02/2018