Ricoh Company, Ltd.

Masayuki Takashima

Noboru Sawayama

Shinichi Kamiyama

Tadayuki Sekiya

Hideo Yuh

A toner supply device for supplying a toner to a developing apparatus of an electrophotographic copier or similar image recorder is implemented by a cylindrical toner tank mounted on the apparatus and a toner cartridge filled with a toner and removably loaded in the toner tank. A hook-like yieldable stop is fitted on the toner tank, while lugs having contiguous inclined surface are provided on the toner cartridge for urging the stop when the cartridge is inserted into the tank. The stop and lugs allow only a toner cartridge of exclusive kind associated with the image recorder to be inserted into the toner tank.

Toner supply device for a developing apparatus

An image forming device having a mechanism for conducting variable magnification by moving a mirror, and lenses, which includes an optical system having six mirrors and a mechanism for moving the fourth mirror and the fifth mirror which are disposed behind the lenses.

Image-forming device

A developing device in which toner fed from a toner cartridge is caused to flow down by a toner supply roller and, then, mixed with a developer by an agitating roller unit which is made up of a spiral blade and a plurality of radial blades. The spiral blade of the roller unit is greater in outside diameter than the radial blades. Those parts of the spiral blade where the individual chambers are located are notched at one side of the spiral blade and intermittently with respect to an order in the circumferential direction, and those parts of the radial blades where the individual chambers into which the developer from the notched parts of the spiral blade flows are notched. The developing device further comprises a developing roller, a paddle wheel for supplying the developer to the developing roller, a doctor blade for regulating the developer on the developing roller to a predetermined thickness, a separator for returning the developer scraped off by the doctor blade toward the paddle wheel and roller unit, a restricting member extending from a developer outlet side of the separator to a position between the paddle wheel and the developer agitating roller unit for blocking a part of the developer collected from the separator. The developer is moved away from the paddle wheel in response to rotation of the roller unit.

Agitating roller and restricting member for a developing device

An image forming device having a mechanism for conducting variable magnification by moving plurality of mirrors and lenses, which includes, an optical system having six mirrors and a mechanism for moving the fourth mirror and the fifth mirror which are disposed behind the lenses.

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Yokohama, Japan

Masayuki Takashima