Abstract: Rolls, belts and other biasable members having minimal sensitivity to relative humidity changes are described. Biasable members having at least one layer or coating of a hydrophobic elastomeric polyurethane change little in resistivity when changes in relative humidity occur. The utility of such biasable members is in the transfer of xerographic images from a photoconductor to a final support sheet where the member, for example, a bias transfer roll, electrically cooperates with a photoconductor to establish a directional force field therebetween.

Abstract: Liquid developer compositions for development of latent electrostatic images are disclosed. The electrostatic printing inks dry at ambient temperatures by penetration into paper leaving a continuous film having excellent rub resistance on the surface. The non-volatile, low viscosity inks comprise about 3-20% pigment and/or dye, about 5-35% of resinous particles having a size of 5 microns or less and having glass transition temperatures close to or below ambient temperature, said resinous particles being dispersed in the liquid carrier, 0-25% dispersing agent and about 25-90% non-volatile, high boiling organic liquid carrier and/or solvent.

Abstract: A method is given for fixing powder images to substrates whereby the powder image is subjected to internal stress and, thereafter, exposed to vapors containing a solvent for the powder image.

Abstract: Liquid developer is removed from support surfaces, such as reusable surfaces used for carrying latent electrostatic images, by blades with relative motion between the surface and the blades. Spreading of the liquid developer upon the cleaned portion of the surface during rest periods is prevented by reversing the relative motion between blade and surface and moving the blade away from the surface before each rest period.

Abstract: A contact fuser assembly for use in a electrostatic reproducing apparatus including an internally heated fuser roll structure comprising a rigid or non-deformable thermally conductive core capable of interacting with a release material applied thereto in such a manner as to form a thermally-stable interfacial coating intermediate the surface of the core and a release coating comprising portions of the release material. The interfacial coating strongly adheres to the core surface and prevents toner material from contacting the outer surface of the core. The combined coatings have a sub-micron thickness and therefore represent a minimal thermal barrier to the energy being conducted outwardly by the core.

Abstract: A highly reversion resistant polyisoprene elastomer composition vulcanized with a low sulfur content is described and used in paper feed belts. The polyisoprene rubber compositions are particularly useful in the paper feed belts used to feed and transport paper in xerographic machines and paper sorting machines. The low-sulfur vulcanizate of isoprene provides high resistance to physical degradation due to dynamic mechanical stress under operating conditions.