DEVELOPING DEVICE FOR COLOR-CHANGEABLE MONOCHROMATIC COPYING MACHINE

摘要

PURPOSE:To obtain excellent sharp images having no image disorder by using one magnetic developer for one of plural development units and a nonmagnetic developer for other development units. CONSTITUTION:Two development units 10 and 20 are provided along a photosensitive drum 1. The nonmagnetic toner 11 is put in the development unit 10 and a nonmagnetic developing roller 12 is provided opposite the photosensitive drum 1. Magnetic toner 21 is put in the development unit 20 and a developer supplied to a developing sleeve by a paddle wheel 22 is attracted to a developing sleeve 23 with the magnetic field produced by a magnet 23 and conveyed to the photosensitive drum 1 to perform development.