Fuji Xerox Co., Ltd.

Masaaki Fukuhara

Jun Abe

Shigeru Inaba

Toru Isosu

Toru Ishikawa

Tsutomu Kimura

Makoto Hirota

Makoto Kanno

Tetsuya Fujita

Mitsuo Yamamoto

Hidekiyo Tachibana

Hideaki Miyata

Masashi Kajimoto

Yutaka Toyoda

Yasuhito Takahashi

Takayuki Sunaga

Mikio Yamamoto

Yoshio Shiina

An electrophotographic single-component developing device including a development roller; a toner storing portion provided in parallel relationship to an axis of the development roller, for storing a single-component toner; and a toner feeding unit provided in the toner storing portion, for feeding the single-component toner stored in the toner storing portion in a direction parallel to the axis of the development roller and supplying the single-component toner to the development roller. The toner feeding unit has a spiral agitator formed from a wire. Accordingly, the ability of toner feed along the development roller and the ability of toner supply to the development roller can be improved without deterioration of the toner.

Electrophotographic single-component developing device

A single-component developing apparatus comprising a developer holding member having a peripheral surface, a power supply section applying an AC developing bias voltage to the developer holding member, the AC developing bias voltage having a waveform with predetermined minimum value, maximum value and period, an electrostatic latent image receiving member opposing the developer holding member across a gap having predetermined width, a developer supplying section supplying a developer to the developer holding member, and a developer regulating member forming developer into a thin layer on the peripheral surface of the developer holding member by pressing on the developer holding member. In this arrangement the developer holding member transports the thin layer of developer towards the electrostatic latent image receiving member, and the transported thin layer of developer flies from the developer holding member across the gap to the electrostatic latent image receiving member in accordance with the AC developing bias voltage. The waveform of the AC developing bias voltage satisfies the inequality:

Single-component developing apparatus

Disclosed is a one-component developing apparatus in which a developing agent scale-off member such as a wire member is provided parallel to the surface of the developing agent carrier so as to be in contact with or in close proximity to a developing agent carrier. A developing agent thin layer formed on the surface of the developing agent carrier which did not contribute to development in a development region comes into contact with the developing agent scale-off member so as to be forcibly scaled off of the developing agent carrier, so that the image history is erased. When the developing agent scale-off member is made to vibrate, or a bias voltage is applied between the developing agent scale-off member and the developing agent carrier, the developing agent may be scaled off more efficiently.

One-component developing apparatus

Growing community of inventors

Ebina, Japan

Masaaki Fukuhara