Appareil de formation d'images et un appareil de developpement avec un obturateur d'un tuyeau d'alimentation en toner

Bilderzeugungsvorrichtung und eine Entwicklervorrichtung mit einem Verschluss einer Tonerzuführungsröhre

Image forming apparatus and a developing apparatus with a shutter for a toner supply pipe


In the developing apparatus (1) including a developing bath (2) and a toner transport pipe (3) for supplying toner to the developing bath (2), a toner supply portion opening/closing mechanism is provided, that includes a shutter member for opening and closing a toner supply port of the toner transport pipe (3) that is contained in a base portion (12) of the toner transport pipe (3), a shaft (30) for moving the shutter member back and forth in a longitudinal direction of the developing bath (2), a second spring member (33) provided such that the shaft (30) is inserted therein, a first spring member (26) for supporting the shaft (30) detachably to the shutter member (20) through its extension and contraction, and a lever member (25) for extending and contracting the first spring member (26) through its releasing and closing.




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Patent Citations (4)

    Publication numberPublication dateAssigneeTitle
    EP-1403733-A1March 31, 2004Ricoh Company, Ltd.Image forming apparatus with a toner container replenishing a process cartridge
    JP-2002268357-ASeptember 18, 2002Ricoh Co Ltd, 株式会社リコートナー補給装置
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    US-5128724-AJuly 07, 1992Casio Computer Co., Ltd., Casio Electronics Manufacturing Co., Ltd.Developer restoring unit in an image forming apparatus

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    Publication numberPublication dateAssigneeTitle