Abstract: A contact charger for charging an outer surface of an electrostatic latent image carrier in contact therewith wherein the charging member includes a co-cured polychloroprene and ECO mixture electrically connected to a conductive substrate. The cured homogeneous mixture is covered with an adhesion resistant layer.

Abstract: A process for producing an electrophotographic photoreceptor having a roughened substrate surface by wet honing the substrate surface with a composition including deionized water and substantially spherical glass beads. The process produces a photoreceptor substrate that eliminates interference fringe effects caused by reflection of coherent light without creating other printing defects such as white or black spots. A wet honing composition for producing such photoreceptors is also provided.

Abstract: A sleeve for a magnetic roller to transfer a developer from a supply to a developing zone. The sleeve having a surface layer formed by burnishing the sleeve with a diamond, wherein the surface layer has an increased resistance to oxidation. A surface contour is formed on the sleeve to lie entirely within the surface layer, wherein the surface contour has a sufficient size to triboelectrically charge the developer. A method for forming the surface finish includes cutting the sleeve with a diamond and impacting a slurry against the sleeve to form the surface contours.

Abstract: A magnet roll for use in a developer unit of an electrostatic copier having a magnet structure provided by elongated bars of permanent magnet material magnetized to provide radially oriented magnets. The bars are sufficiently rigid to support hubs without the need for a core. A cylindrical shell of conductive material is rotatably mounted on the magnet structure by shafts which are either journaled in or on the hubs of the magnet structure. The bars are made of conductive plastic or ceramic or elastomeric material (rubber) having permanent magnet material therein which is polarized to provide magnetic poles along the axis of the cylindrical shell which are magnetized in a radial direction with respect to the axis. The elastomeric (rubber) magnet bars have a rigid (steel) backing. The entire roll may be fabricated, essentially from plastic material and at low cost.

Abstract: Pressure rolls useful in printing, embossing, coating, calendering, conveying, and fixing images to substrates. The pressure rolls comprise a cylindrical core provided with an array of axial slots, a heating element disposed in the slots, and a shell around the core. The pressure rolls may be employed in apparatus for fixing a toner material image pattern on a substrate such as a paper sheet. The pressure contact between the sheet and the pressure rolls is established by a hydrostatic assembly which may be pre-set.