Patent ID: 8781376
Filing Date: 2014-07-15
Classification: G03G

Abstract:
1. A toner supply device, comprising: a toner container having a wall section which is cylindrically shaped and has an opening formed therein, the toner container containing toner in a space surrounded by the wall section; a joining section fixed to the toner container, configured to join a rotary drive source which rotates the toner container around an axis of the wall section; and a scraping member which is contained in the space so as to freely rotate around the axis of the wall section and which scrapes off toner adhering to the wall section, the scraping member comprising: a first curved part extending along a portion of a half cycle or more and one cycle or less of a first spiral along an inner face of the wall section, a second curved part extending along a portion of a half cycle or more and one cycle or less of a second spiral along the inner face of the wall section, wherein a proceeding direction of the second curved part is opposite to that of the first curved part, and a connecting part which connects the first curved part and the second curved part, which extends along a line segment which is parallel to the axis of the wall section, and which is opposite to the opening.