Hitachi, Ltd.

Yoshio Ohuchi

Akira Shimizu

Akira Sasaki

Masahiko Saito

Kazuhiro Wakamatsu

Junichi Matsuno

Chikara Hiraoka

Yoshitaro Ishii

Masashi Yamamoto

Katsumi Kumada

Shogo Matsumoto

Nobuaki Fukasawa

Mieko Ishii

Seiji Okunomiya

Takatoshi Ikeda

Satoshi Narita

Hisao Suka

Michio Sumiyoshi

Shizuo Tsuruta

Tetsunori Kaneko

Kazutaka Satou

Hideyuki Omori

Kiminori Takada

Osamubo Otubo

An electrophotographic image forming system having a form cassette for storing forms, a transfer unit for forming an image, a feeder for feeding the forms to the transfer unit and a fusing device for fusing transferred image of the form. The electrophotographic image forming system provides in a path for feeding the form with unfused colored particles (toner) deposited thereon, a form guide so as to contact the non-printing area of the surface of the form with unfused colored particles (toner) deposited thereon.

Electrophotographic image forming system

A liquid type development device for developing an electrostatic latent image formed on image-holding equipment by using liquid developer made of a highly insulating solvent and toner particles dispersed in the solvent has a liquid developer tank detachably situated in a cartridge; and at least one supplementary liquid tank containing supplementary liquid to be added to liquid developer contained in the liquid developer tank so as to keep the concentration of nonvolatile components in the liquid developer constant. Further, when the used development cartridge is recovered, and another new development cartridge is bought, a discount price privilege for the newly bought development cartridge is given to a user who has turned in the used cartridge.

Liquid developing device, method of it's maintenance and the method of recovery of supplemental fluid from the liquid developing device

A double-surface printing apparatus, which is small-sized and has a simple construction to make it impossible to take out a sheet, of which one surface has been subjected to printing, from outside. The apparatus includes a paper discharge tray, to which sheets having been subjected to printing are discharged; a sheet reversing mechanism including a reversal/temporary storage unit for guiding a sheet in a direction different from a discharge direction toward the paper discharge tray, once exposing the sheet outside of the apparatus, and rotating conveying rollers in an opposite direction to thereby reverse the sheet; and a protective cover, which covers the sheet conveyed to the reversal/temporary storage unit so that a sheet, of which one-surface has been subjected to printing, cannot be taken out from outside.

Double-surface printing apparatus

Ink jet recording apparatus has an ink sensor which detects charges on charged ink droplets emitted from a nozzle of the ink jet recording apparatus and emits electric signals for controlling the above apparatus. The ink sensor comprises a pair of induction plates disposed with a separation distance, and a pair of grounded plates each of which is mounted on each of the induction plates through an electric insulator. The sensor is disposed such that flying paths of the ink particles to be detected are between the pair of induction plates. In the induction plates, current is induced at every time when each of the charged ink droplets pass between the pair of induction plates thereby providing electric signals for controlling.

Ink jet recording apparatus with an improved ink sensor

In the case of writing information on a writing medium, such as the crown cap of a bottle, by the use of an ink drop writing apparatus, the information cannot be written at one selected position because the height of the writing medium varies with the height of the bottle and due to other factors. In emitting and deflecting charged ink drops to effect a writing on a writing medium whose position may vary somewhat, this invention detects the position of the writing medium in the deflecting direction of the charged ink drops with photoelectric means and increases or decreases the amount of deflection of the ink drops in accordance with the detected position of the writing medium. It is, accordingly, possible to write the desired information at precisely the correct position on the writing medium at all times.

Ink drop writing apparatus

Growing community of inventors

Tokai-mura, Japan

Yoshio Ohuchi