US Patent 7991333 Image forming apparatus and developing agent cartridge

An image forming apparatus is described. The image forming apparatus may include an image carrier on which an electrostatic latent image is formed; a developing agent carrier that transforms the electrostatic latent image into a visible image by supplying a developing agent to the image carrier; and a developing agent cartridge that accommodates a developing agent to be supplied to the developing agent carrier, arranged so as to be opposed to the developing agent carrier in a longitudinal direction of the developing agent carrier, and formed with an opening for horizontally passing the developing agent in a position horizontally opposed to the developing agent carrier.