Apparatus for discharging a fatigued developing agent in a magnetic brush developing device

摘要

An apparatus for discharging a used and fatigued developing agent from a magnetic brush developing device installed in a main body of a copying machine, which developing device has a housing with an opening at a position which is opposed to a charge retentive member such as a photosensitive drum and a record paper, a sleeve made of non-magnetic material is rotatably arranged in the housing such that it exposes the outside of the housing through the opening and a magnet assembly arranged in a space within the sleeve. First and second shafts are secured to the respective sides of the magnet assembly, a third shaft secured to the sleeve at a side which is opposed to that of the magnet assembly to which the first shaft is connected, first and second bearing members are arranged between the first and second shafts and the sleeve, respectively, and a manually operable handle is secured to either one of said second and third shafts. Means guide the housing to a position removed from the main body and a scraper is then detachably secured to the housing in operative association with the sleeve. The handle is operated whereby the magnetic brush discharges said fatigued agent through the scraper and into a receiver.