Patent ID: 7937036
Filing Date: 2011-05-03
Classification: G03G

Abstract:
1. A collected developer conveying device comprising: a conveying passage through which collected developer is conveyed; a conveying member that is disposed in the conveying passage, and conveys the developer in the conveying passage by rotation thereof; a developer carrying body that holds developer on a surface thereof, and that is rotatable; and a ventilation passage through which air passes from a developing container that includes the developer carrying body, wherein: the conveying member defines a conveying cylinder in which the conveying member rotates, the conveying passage includes an air flow region which is a region defined between the conveying cylinder and a portion of an outer boundary of the conveying passage which is provided above a rotational center of the conveying member in a gravitational direction and provided in a side of the conveying passage in which the conveying member rotates from an upper part of the conveying passage to a lower part thereof in the gravitational direction, the conveying passage includes a second region which is a region defined between the conveying cylinder and a portion of an outer boundary of the conveying passage which is provided below a rotational center of the conveying member in a gravitational direction and provided in a side of the conveying passage in which the conveying member rotates from an upper part of the conveying passage to a lower part thereof in the gravitational direction, and a sectional area of the air flow region, which is taken along a plane which is perpendicular to an axis around which the conveying member rotates, is larger than a sectional area, which is taken along the perpendicular plane, of the second region.