Seiichi Miyakawa

Method of maintaining the correct conditions of an electrophotographically duplicated image

Apparatus for developing electrostatic image

Auto document feeder for use with duplex copying machine

Wet-type image forming apparatus for forming a condensed toner image

Electrostatic copying machine comprising improved magnetic brush developing-cleaning unit

Exposure control and other component control for electrostatic copying machine

Developing unit for electrophotography

Image forming device which forms an electric field to discharge an object

Apparatus for sensing deterioration of developing substance including ferromagnetic carrier and non-magnetic toner particles

Method for controlling a copying apparatus adapted to print images on opposite surfaces of a copy sheet