Minolta Camera Kabushiki Kaisha

Shigemitsu Shimizu

Yutaka Irie

Yasuhiko Doi

Norihiko Suzuki

Takeshi Morikawa

Kenji Shibazaki

Tomoji Murata

Toshio Matsui

Yoshihisa Kawai

Shunji Yamamoto

Soichi Iwao

Toshio Yamamoto

Yukio Tokura

Koji Imaizumi

Isao Iizaka

Osamu Miyamoto

Takashi Hikosaka

Souichi Iwao

An electrophotographic copying apparatus equipped with an improved copy paper cutting arrangement in which a distance between an exposure position and a transfer position along a photosensitive drum is made larger than a distance between a copy paper cutting position and the transfer position so as to actuate a cutter device after termintion of the exposure through a cutter operating mechanism.

Electrophotographic copying apparatus equipped with improved copy paper

A device for cutting a paper web includes a rotary blade assembly, a stationary or non-rotatable blade in cutting engagement with the rotary blade assembly and being retractable from the rotary blade assembly during the cutting engagement therewith, guide members supporting the non-rotatable blade for sliding movement in the direction of the retraction, and the non-rotatable blade being biased into cutting engagement with the rotary blade assembly.

Full rotation-type paper web cutting device

An electrostatic latent image transfer type copying apparatus which has a photoconductive member, a system for forming an electrostatic latent image on the photoconductive member, an image transfer system for conducting transfer material having an insulating dielectric layer coated over an electrically conductive layer into contact with the photoconductive member for transferring the latent image onto said transfer material, a transporter for the transfer material to transport it along a predetermined path to the image transfer system, a member such as a relatively sharp edge member like a cutter provided along the path and below which the insulating dielectric layer side of the transfer material passes, and an insulating member provided adjacent the sharp edge member for preventing the surface of transfer material from contacting the sharp edge member as the transfer material is transported, whereby the contact of the sharp edge member with the surface of transfer material which causes frictional charging on the transfer material is substantially prevented.

Electrostatic latent image transfer type copying apparatus

A developing device employing developing solution for use in an electrophotographic copying apparatus, which developing device includes a pair of stirring impellers rotatably disposed at the bottom of a developing tank and a plurality of pairs of copy paper feeding and electrode rollers immersed in the developing solution above the impellers, with one of the roller pairs being associated for simultaneous rotation with the impellers for efficient circulation of the developing solution, and for rapid and uniform dispersion of toner particles in the developing solution.

Wet type developing device for use in electrophotography

In an electric safety switch circuit for use in apparatus having at least one safety switch for detecting at least one abnormal condition of the apparatus, switching elements are connected between a power source and the apparatus. The voltage of the main power source is transformed to a lower voltage and the switching elements are opened or closed by control circuitry in the low voltage circuit. The at least one safety switch is connected to the voltage transformer and the control circuitry such that the actuation of the at least one safety switch upon detection thereof of an abnormal condition actuates the control circuitry to open the switching elements and disconnect the apparatus from the power source. In one embodiment a primary switch is interconnected between the power source and the electric safety switch circuit, and in a modified embodiment the primary switch is connected in the electric safety switch circuit itself. The reduction in the voltage and current in which the primary switch and/or the at least one safety switch are interconnected results in improved reliability, durability, and operating life of the electric circuit as well as providing commensurate decreases in the cost of the electric circuit.

Electric safety switch circuitry

Growing community of inventors

Toyokawa, Japan

Shigemitsu Shimizu