Fujitsu Corporation

Hiroki Oba

Takashi Suzuki

Noriko Kawasaki

A two component developing apparatus includes a container (2a), a developing agent conveying means (20) for conveying a two component developing agent consisting of toner and carrier to an image carrier (1) from the container (2a), a mixing device (21, 22) for mixing the toner and the carrier in a toner storage section (28) of the container (2a), and a toner supplier (25) for supplying the toner in the toner storage (28) into the container (2a). The toner supplier (25) includes a toner supplying rollers (26, 27) which can vary a flow of toner per unit time and a controller (44) for controlling the supplying rollers (26, 27) on the basis of the detected flow of toner. The flow of toner per unit time at the supplying rollers (26, 27) is controlled on the basis of a consumption rate of toner. The toner supplying rollers may have cells or holes on their surface.

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Fuchu, Japan

Hiroki Oba