Patent ID: 6850714
Filing Date: 2005-02-01
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a cartridge detachably mounted thereon, said cartridge including a storage medium capable of storing electronic information and a part of plural process means for image formation including a photosensitive body on which an electrostatic latent image is formed, charging means for charging said photosensitive body, development means for developing the electrostatic latent image formed on said photosensitive body, and exposing means for exposing said photosensitive body; means for detecting a driven amount of said cartridge; and control means for changing an exposure condition of said exposing means for exposing said photosensitive body on the basis of the information stored in said storage medium, wherein said storage medium stores, in advance (1) threshold information relating to a threshold value used to change the exposure condition for said exposing means to expose said photosensitive body and (2) arithmetic coefficient information used to calculate used amount information of said cartridge, said storage medium having an area for storing information on the driven amount of said cartridge, and wherein said control means calculates the used amount information of said cartridge on the basis of the driven amount information and the arithmetic coefficient information, and when a value obtained by the calculation of said control means reaches the threshold value, said control means changes the exposure condition for said exposing means.