Patent Number: 6,298,202

Title: Image forming apparatus having a sensor for determining whether a replacement unit is new/old and mounted/non-mounted

Abstract: An image forming apparatus of the present invention is provided with elements for use in image formation as expendable supplies; with a detachable replacement unit 108 having a movement 205 which can move from a first position to a second position but which once it moves to the second position, is prohibited from returning to the first position, having a moving member that serves to move the movement 205 from the first position to the second position, and having a drive mechanism that causes the moving member to move the movement 205 in conjunction with the drive of the elements; with a sensor 703 which detects a position of the movement 205; and with a controller which judges whether the replacement unit 108 is a new one or not on the basis of the result of detection of the sensor 703 anterior and posterior to the drive of the drive mechanism.

Inventors: Fushiya; Noriyuki (Tochigi 329-1103, JP), Koumoto; Mitsuhiro (Utsunomiya-shi, Tochigi 321-0967, JP)

Assignee:

International Classification: G03G 21/18 (20060101); G03G 015/00 ()

Expiration Date: 10/02/2018