Olympus Optical Company, Ltd.

Shigeru Nakayama

Masaji Nishikawa

Norio Amemiya

Tadahiro Yasuda

Tastuo Takizawa

A toner cleaning apparatus for use in an electrophotographic copying machine in which a photosensitive drum is rotated for a few revolutions after transferring, onto a record paper, a toner image obtained by developing an electrostatic latent image with toners, in order to remove residual toners from the drum and to prepare the drum for the next duplicating operation. A cleaning device, such as a fur brush, is arranged movably with respect to the photosensitive drum and is separated from the drum after the end of a copying operation, but before the drum is stopped. The cleaning fur brush is removed from the drum at such a timing that the pictorial area on the drum surface has just passed through the cleaning fur brush and thus, residual toners on the drum can be effectively removed. By shortening the time duration in which the cleaning fur brush is brought into contact with the photosensitive drum, the drum can be protected against injury, deterioration and filming.

Toner cleaning apparatus

An electrophotographic sensitizing screen having a great number of apertures, wherein at least an insulating layer and a conductive layer are successively formed on a conductive mesh, is disclosed. These apertures are regularly arranged at such an angle as not to produce moire fringes with respect to a light image projected on the screen.

Electrophotographic sensitizing screen with peripherally clogged

A temperature sensor for a sheet-shaped heating element includes a thermistor which is fixedly mounted in a mounting aperture formed in a sheet-shaped heating element. The thermistor is disposed in the mounting aperture so that lead wires within the envelope of the thermistor extend normal to the plane of the heating element.

Temperature sensor for sheet-shaped heating element

Electrophotographic sensitizing screen

A heat fixing device for electrographic apparatus comprising a pair of opposed electrically conductive guide members between which passes a record sheet with a toner image transferred thereon, a floating potential or bias voltage being applied to at least one of the guide members so as to produce a repulsive force which can alleviate an electrical attractive force subjected between the guide member and the toner image on the record sheet.

Growing community of inventors

Hachioji, Japan

Shigeru Nakayama