Patent ID: 9020411
Filing Date: 2015-04-28
Classification: G03G

Abstract:
1. A toner recovery device comprising: a toner recovery container that recovers toner, toner recovery comprising a toner storage space that stores toner; and a toner conveying path that is adjacent to the toner storage space and extends along the toner conveying shaft member; and a toner conveying shaft member that is provided inside the toner recovery container and conveys toner in a axial direction of the toner conveying shaft member by the rotation around a rotational axis of the toner conveying shaft member and that has a spiral groove formed around the rotational axis and an outer peripheral surface whose distance from the rotational axis is variable, the groove having a constant width wherein the spiral groove is formed of a shape such that the intervals between groove turns adjacent to each other in the axial direction increase gradually in a direction from a start end of the toner conveying path to a terminal end thereof.