Abstract:

A developing device is provided that facilitates developing agent delivery upward. A cartridge includes a developing roller, a supply roller, and a container disposed below the supply roller. The container can have an upper portion formed with an opening having upper and lower edges. A conveying member can be rotatably disposed in and in rotational contact with an inner surface of the container for delivering the developing agent upward. The developing agent container can include a first wall portion for receiving developing agent through the opening. The first wall portion extends from the lower edge in a downstream direction with respect to a rotational direction of the conveying member toward a bottommost portion of the supply roller. The container also includes a second wall portion extending from the upper edge in an upstream direction. The conveying member can be in simultaneous sliding contact with the first and second wall portions.

Description:

CROSS REFERENCE TO RELATED APPLICATION

This application claims priority from Japanese Patent Application No. 2008-117979 filed Apr. 30, 2008. The entire content of the priority application is incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to a developing device and an image forming apparatus provided with the developing device.

BACKGROUND

A tandem type image forming apparatus is known in which a plurality of photosensitive drums is arrayed in line in a horizontal direction. Laid-open Japanese Patent Application publication No. 2003-29532 discloses such an image forming apparatus provided with a toner container in which a toner chamber containing a toner as a developing agent is disposed below a photosensitive drum.

In such a conventional image forming apparatus, stabilized toner supply to the photosensitive drum may be difficult to achieve, since the toner in the toner chamber must be ...

Alkali-free aluminoborosilicate glasses for lighting means with external or internal contacting