Hitachi, Ltd.

Hitachi Metals, Ltd.

Hitachi Koki Co., Ltd.

Hidefumi Otsuka

Kenji Okuna

Tsutomu Iimura

Katsumi Muroi

Ryoji Kojima

Kastubumi Ouchi

A printing machine according to the present invention, comprises electrically conductive and magnetically inductive printing toner, an array of electrode-needles contacting with toner, each of the electrode-needles arranged apart from the adjacent electrode-needles in the array and individually energized in accordance with a desired printing pattern to electrify the toner communicating electrically with the energized electrode-needle, recording means including an electrically conductive portion and an insulating surface which extends on the electrically conductive portion and is arranged away from the array of electrode-needles to face thereto and to contact with the toner arranged between the electrode-needles and the insulating surface, the voltage applied to the electrically conductive portion being positive when the voltage applied to the energized electrode-needles is negative or the voltage applied to the electrically conductive portion being negative when the voltage applied to the energized electrode-needles is positive so that the toner electrified by the energized electrode-needle is attracted and attached to the insulating surface by the electrically conductive portion, the insulating surface moving in relation to the array of electrode-needles so that the toner is attached to an area of the insulating surface, magnetic means for attracting the magnetically inductive printing toner to form toner chains between the array of the electrode-needles and the insulating surface, and transferring means for transferring the toner from the insulating surface to a work piece, wherein longitudinally extending surfaces of the electrode-needles face to the insulating surface to electrify the printing toner arranged between the electrode-needles and the insulating surface.

Printing machine

Growing community of inventors

Ibaraki, Japan

Hidefumi Otsuka