Patent Number: 6,253,035

Title: Image forming apparatus having means for detecting amount of developer used and means for detecting failure of used developer amount detecting means

Abstract: An image forming apparatus includes an image bearing member, a container for containing a developer removed from the image bearing member, a detector for detecting an amount of developer removed from the image bearing member and contained in the container, and a failure detector for detecting a failure of the developer amount detector on the basis of the degree of use of the image bearing member and a detection result of the developer amount detector.

Inventors: Kawana; Takashi (Yokohama, JP), Sasame; Hiroshi (Numazu, JP), Ogasawara; Yoshimi (Shizuoka-ken, JP), Ueno; Fumihiro (Mishima, JP), Teshima; Eiichiro (Odawara, JP), Okada; Tomoyuki (Shizuoka-ken, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: G03G 21/12 (20060101); G03G 015/00 (); G03G 021/00 ()

Expiration Date: 06/26/2018