Abstract: A toner composition comprising a primary resin and at least one additional polymeric component is improved by reactive compatibilization of the additional polymeric component and the resin. For example, effective amounts of a functional secondary resin and a functional silicone oil having functionality reactive therewith are included and mixed by extrusion so as to reduce or eliminate speckling in printing with the toner and the improve toner powder flow.

Abstract: Charge transport layers comprise a hydrazone charge transport compound, Savinyl® yellow and an antioxidant. Dual layer photoconductors comprise the charge transport layer in combination with a substrate and a charge generation layer.

Abstract: A dry, powder electrostatic toner having polyester resin as a binder, pigment as a colorant, charge control ingredients polyethylene wax as a release agent, and extra particulate elements to improve flow and to scrub the doctor blade, one extra particular element is hydrophilic rutile acicular titanium oxide with aluminum oxide surface treatment, two silicas are blended within the bulk of the toner, one of BET surface area of about 30 m2/g and one of BET surface area of about 380 m2/gn; and an organoboron complex negative exchange control agent is blended with a quaternary ammonium salt of an aluminosilicate compound negative charge control agent. Improved functioning as a toner is realized.

Abstract: An assembly is provided for cleaning toner resin from the operating parts of a printing device. The assembly comprises a porous member impregnated with a silicone copolymer and a rigid member with a supporting base to mount said porous member. The assembly is preferably a two-part kit having a brush member for wiping components of the printing device and a pad member mountable for stationary positioning within said printing device for scrubbing components of the printing device as they move relative to the mounted pad. The silicone copolymer has the formula where x represents from about 98.8 molar percent to about 99.5 molar percent, y represents from about 0.5 molar percent to 1.2 molar percent and R comprises from about 70% by weight to about 100% by weight of a C15-C60 alkyl group and from about 0% by weight to about 30% by weight of a C2-C14 alkyl group.

Abstract: A process for dip coating, particularly vertical dip coating, the topcoat layer onto fuser belts used in electrophotographic processes is disclosed. In this process, a C1-C4 alkanol, such as isopropyl alcohol is added to the solvent system for the fluorocarbon topcoat layer. The use of alcohols in this way provides an efficient and effective method and a topcoat layer which is smooth, uniform and has a good finish.

Abstract: To make a seamless tube of polyimide, an amount of polyamic acid precursor to constitute the final tube is applied eveny as a solution to a cylindrical mandrel. The mandrel is rotated while a canted doctor blade smoothes the solution. The solvent is then expelled and the remaining precursor cured by heat.

Abstract: Mirror (1) of a laser printhead has an octagonal outer configuration. During normal use the mirror rotates at high speed, causing noise. To reduce the a wall (13a) surrounds the mirror and has lower flange extensions (13c′, 13c″13c′″13c″″) which firmly contact the lower plate (3) by attaching screws ( 17′, 17″). A cover (13) is over all of the circle defined by the wall and the underside of the cover is partially lined with a sound absorbing layer (19).

Abstract: A system and method for providing a virtual operator panel for a peripheral device where the system includes a peripheral device including a processor and a data store that stores public settings corresponding to private settings of the peripheral device, each public setting indicative of at least one private setting of the peripheral device. The peripheral device has a device process and a host process, or alternately, is in bidirectional communication with at least one host computer including a data store, a display and a processor. The host computer or host process selectively transmits a request to the peripheral device or device process requesting public settings of the peripheral device for the generation of a virtual operator panel for the peripheral device.

Abstract: Toner exhaustion is sensed in cartridge (1) having a toner chamber (3), a rotation paddle (7) extending across the long dimension. Chamber (3) has a transparent window (21) at its bottom and a reflective surface (23) in chamber (3), also at the bottom. An optical emitter and receiver (31) periodically senses for returned light, which indicates toner low. Paddle (7) carries a wiper to clean window and reflective surface. This provides improved accuracy by a cost-effective system.

Abstract: Toner particulates include a release agent which comprises a functionalized enhancing agent and a wax. The toner particulates may be used to improve dry fuser release and to improve color clarity in overhead transparencies.

Abstract: An article used to seal the interface between the developer roll, doctor blade and developer housing in a laser printer toner cartridge is described. The sealing member described in the present application performs static sealing between the components while the cartridge is idle and performs dynamic sealing while the toner cartridge is used for printing, keeping the sealing surfaces free from toner by actively pushing the toner back into the developer sump. The seal has a rotary seal portion which seals between the frame of the cartridge and the developer roll, and a blade seal portion which seals between the frame of the cartridge and the doctor blade. The rotary seal portion is biased toward the surface of the developer roll and incorporates, on its face adjacent to the developer roll, ridges which act to push the toner away from the edge of the developer roll in use. The blade seal portion is biased toward the doctor blade.

Abstract: Polycarbonate diols and polyethercarbonate diols having only aliphatic hydrocarbon moieties are useful as co-binders in the charge transport layers of electrophotographic photoreceptors of xerographic printers and copiers. Preferably, the co-binders have number molecule or weights of from about 200 to about 2000.

Abstract: A toner cartridge for use in a laser printer has a toner reservoir or hopper in which a first paddle rotates about a fixed first axis to sweep most of the toner volume of the cartridge to agitate and push the toner out of the toner reservoir or hopper through an exit port. A second paddle is pivotally mounted on the first paddle to sweep a volume of the toner reservoir or hopper in which a portion of the longitudinal wall of the toner reservoir or hopper of the toner cartridge is non-circular so as to produce a reduced cross section in the toner reservoir or hopper. The second paddle also initially engages the curved portion of the inner surface of the longitudinal wall of the toner reservoir or hopper and preferably has a tear drop cross section.

Abstract: A calibration rod (1) with grooved track (2) and a testing apparatus (17) for magnetic rolls that produces an accurate homing location and probe-to-probe reference for repeated test verification at many testing locations. The grooved track calibration rod can be transported to different equipment to verify that equipment is performing similarly, has improved accuracy, has temperature compensation, uses a circumferential drive movement from one end of a roll magnet and verifies angular position from the other end, eliminates the possibility of angular inaccuracy from twisting of the part being measured during clamping and provides for improved accuracy of several degrees. A high order polynomial curve fit of the data is used to determine the true value of the Gauss level being measured during 360 degree revolution. The apparatus takes measurements to accurately measure magnetic differences which define differences in probe operation.

Abstract: Azine derivatives or their combinations with hindered phenol antioxidant in the charge transport layer containing one or more triarylamines or a combination of one triarylamine and one hydrazone improve light fatigue of a photoreceptor, which results in stabilized print quality. The robust performance against light damage allows the shutter in a cartridge to be removed and the requirement for special protection procedure during inspection and handling to be simplified.

Abstract: Methods of forming a conductive aluminum substrate comprise anodizing a surface of an aluminum substrate to form a porous alumina surface layer, contacting the alumina surface layer with a liquid dispersion or solution of a polymer or at least one polymer-forming component, under conditions sufficient for the polymer to seal pores of the alumina surface layer, and removing excess polymer from the alumina surface layer. The resulting sealed conductive aluminum substrate is useful in photoconductors, for example of the dual layer type.

Abstract: Inserts (1) to reduce noise from photoconductor drums during use are molded by thermal injection to have a bridge (5, 51, 5b) across the longitudinal gap (7, 7a, 6b) of the insert. In the preferred embodiment the bridge is centered with respect to the long dimension of the insert and the bridge is in the form of a rectangle and thin. The bridge holds the shape of the insert during cooling after molding. Subsequently, the bridge may be severed or cut out, but that is generally unnecessary.

Abstract: Toner particulates comprise a styrene/acrylic copolymer having a first aliphatic hydrocarbon wax incorporated therein during polyermization of the copolymer, and a second aliphatic hydrocarbon wax mixed with the copolymer.