Abstract: A method of forming a plastic sealing plate for a compressor valve. A center gated mold is employed in conjunction with a heated barrel which encloses a reciprocating screw for feeding plastic through an injector into the mold. Polyetheretherketone polymer pellets are heated to about 150.degree. C. to remove moisture after which they are fed into and through the heated barrel, the heated barrel being elevated to a temperature in the range of 350.degree.-380.degree. C. for melting the pellets. The mold is heated to a temperature in the range of 150.degree.-180.degree. C. The melted polymer is then injected into the mold by the reciprocating screw to obtain proper mixing and pressurizing, after which the mold is heated to a temperature of about 300.degree. C. to anneal the plastic in the mold and to expand the polymer to fill the entire mold and relieve stress in the material.

Abstract: A valve for reciprocating compressors generally comprising a seat member, a movable plate member, a flat spring plate, and a guard which are assembled as a unitary structure. The seat member and the plate member have linear fluid passage ports which are offset relative to each other. When the valve is in its normal sealing position, the plate member is pressed by linear spring fingers formed on the spring plate against the seat member causing the surface area of the plate member to block the linear fluid passage ports of the seat member. The plate member also has projections extending in a linear or circular direction to receive the spring fingers. When the pressure in the reciprocating compressor becomes sufficiently great, the plate member moves backwards against the spring plate allowing the fluid to move through the valve, including the linear fluid flow passages of both the seat member and plate member.

Abstract: A sealing apparatus for use in a compressor suction or pressure plate valve having a seat member with a plurality of fluid passage ports therethrough. The sealing apparatus comprises a movable plastic plate member having a like plurality of sealing members for juxtaposed sealing engagement with the plurality of fluid passage ports and at least one projection integrally formed on at least one of the sealing members and extending outwardly from the plate member in a direction away from the seat member for receiving a resilient flat spring member urging the plate member against and sealing the fluid passage ports.

Abstract: A sealing apparatus for use in a compressor suction or pressure plate valve having a seat member with a plurality of fluid passage ports therethrough. The sealing apparatus comprises a movable plastic plate member having a like plurality of sealing members for juxtaposed sealing engagement with the plurality of fluid passage ports and at least one projection integrally formed on at least one of the sealing members and extending outwardly from the plate member in a direction away from the seat member for receiving a resilient flat spring member urging the plate member against and sealing the fluid passage ports.

Abstract: A sealing apparatus for use in a compressor suction or pressure plate valve having a seat member with a plurality of fluid passage ports therethrough. The sealing apparatus comprises a movable plastic plate member having a like plurality of sealing members for juxtaposed sealing engagement with the plurality of fluid passage ports and at least one projection integrally formed on at least one of the sealing members and extending outwardly from the plate member in a direction away from the seat member for receiving a resilient flat spring member urging the plate member against and sealing the fluid passage ports.

Abstract: A lubrication system for a mechanism including a differential pump for pumping lubricant into the mechanism powered by the flow of a first lubricant from a parallel lubrication system within the mechanism.

Abstract: A method of depositing and affixing a layer of a copolymer of perfluoroalkyl perfluorovinyl ether and tetrafluoroethylene upon a metal surface and the article prepared thereby, is disclosed. A flame sprayed metal surface having an optional fluoropolymer primer thereon is powder coated with the copolymer of perfluoroalkyl perfluorovinyl ether and tetrafluoroethylene and the powder is fused thereon. An improved long life fuser member for use in a fusing apparatus for fixing toner images to copy sheets by the application of heat and pressure is described.

Abstract: Butadiene copolymers having controlled electrical life and controlled resistivity are described. A method is disclosed for enhancing the electrical life of butadiene copolymers having solubilized conductivity control agents incorporated therein by varying specified quantities of terminally unsaturated hydrocarbon nitriles in copolymers of the butadiene and the specified nitriles by using mixtures of such copolymers having conductivity control agents therein. The method and polymers are useful for enhancing the electrical life and polymer stability in xerographic devices where control of conductivity and/or relaxation behavior is important, e.g., in bias transfer rolls.

Abstract: A corona discharge device including a corona discharge electrode and a conductive shield located adjacent the electrode, the electrode being coated with relatively thick dielectric material so as to substantially prevent the flow of conduction current therethrough. The delivery of charge to the photoconductive surface is accomplished by means of a displacement current or capacitative coupling through the dielectric material. The flow of charge to the surface to be charged is regulated by means of a d.c. bias applied to the corona shield.

Abstract: A method is disclosed for extending the electrical life of copolymers of butadiene and terminally unsaturated hydrocarbon nitriles by incorporating salts having asymmetrical quaternary ammonium cations or salts having structural charge specific anions therein. The method and polymers are useful for extending the functional electrical life and electrical stability of materials used in xerographic devices where control of and minimizing of the variations in the resistivity under applied voltages vs. time is important, e.g., in bias transfer rolls.

Abstract: Butadiene copolymers having controlled electrical life and controlled resistivity are described. A method is disclosed for enhancing the electrical life of butadiene copolymers having solubilized conductivity control agents incorporated therein by varying specified quantities of terminally unsaturated hydrocarbon nitriles in copolymers of the butadiene and the specified nitriles by using mixtures of such copolymers having conductivity control agents therein. The method and polymers are useful for enhancing the electrical life and polymer stability in xerographic devices where control of conductivity and/or relaxation behavior is important, e.g., in bias transfer rolls.