Abstract: In a copying apparatus where image developer material is cleaned from a reusable imaging surface by a resilient cleaning blade, one edge of the blade is mounted within a blade retaining channel with opposing generally parallel walls spaced apart by a distance slightly greater than the thickness of the blade to provide unobstructed ingress of the cleaning blade mounting edge against a linear base of the channel without compression of the blade. The blade mounting channel has an arcuate intermediate bend resiliently bending the cleaning blade within the channel sufficiently to cause the cleaning blade to resiliently frictionally engage both walls of the channel to frictionally retain the blade and to seal the channel from the image developer material.

Abstract: A drum support apparatus including outboard and inboard hubs having outer surfaces adapted for interface fitting with the inside surface of a drum. The hubs while being supported on a shaft that is cantilevered from a frame, provide support for the drum in the form of a plurality of spaced equidistant lobes located on their outer surfaces. The lobes reduce the load required to properly seat the drum against the hubs and thereby decreases the possibility of drum run-out by reducing the contact area when the interface fit of the drum/hub combination occurs. The shaft is supported at its outboard end by a removable support bracket.