Fuji Photo Film Company, Limited

Hisashi Katou

Satoru Honjo

Tsutomu Yamazaki

Masakazu Iwasa

Naoki Sakai

Hiromi Yazawa

Akio Matsunami

A control electrode assembly is provided between a corona discharger and an electrostatic recording medium. The control electrode assembly has a pair of conductive electrodes interposing therebetween a insulating layer having a through hole extending from the upper conductive electrode to the lower conductive electrode. Selected one of the conductive electrodes is grounded through a change-over switch, which connects the selected electrode to the ground and disconnects the other non-selected electrode from the ground to electrically open it. Corona ions from the corona discharger charge the electrically opened conductive electrode to establish an electric field within the through hole. The corona ion current passing through the through hole can be modulated by operating the change-over switch to control the direction of the electric field established within the through hole in accordance with an image signal to form an electrostatic image on a recording medium.

Method of forming electrostatic image

A marking method and marking device for providing an image upon a steel material or other hardened surface. A toner image is formed on the surface of the marking drum having an elastic surface. The drum is placed in abutment with the material to be marked under pressure while at least one of the drum material to be marked is moved along the surface of the other to thereby transfer the toner image onto the surface to be marked. Toner fixing liquid is subsequently dispensed over the transferred image. Apparatus for driving and supporting the marking drum is disclosed including a swinging support arm which may be extendible in some embodiments so as to make the device capable of marking many types of surfaces.

Marking method and device

Growing community of inventors

Odawara, Japan

Hisashi Katou