to facilitate cleaning of drum 12 a fadeout or exposure lamp 23 may be provided to discharge any residual charges on the drum photoconductive surface in preparation for cleaning by a suitable brush 24 a suitable fixing device or fuser 26 is provided to permanently fix the toner image on web 21 the aforesaid stations are operatively disposed about the xerographic surface of drum 12 upon which the images are to be formed the photoconductive or xerographic surface of drum 12 designated here by the numeral 28 may comprise any suitable photoconductive material such as selenium shaft 29 of drum 12 is suitably supported for rotational movement suitable drive means not shown being provided to turn drum 12 in the direction indicated by the solid line arrow as well as for initiating the cycle of operation for the various processing stations described heretofore while the photoconductive surface for the xerographic machine 10 has been illustrated as a drum it will be understood that other types of surface such as a belt may instead be used the developing instrumentalities of development station 18 are encased in a general developer housing 30 the lower or sump portion 31 of the developer housing 30 is adapted to be filled with a quantity of two component developer material the developer may be raised to an elevated position for cascading down the xerographic surface by a series of buckets 32 on a movable.