Abstract: An apparatus in which a charged photoconductive member is exposed to a light image of an original document. An array of solid state light emitters are employed to illuminate the original document. The light image of the original document is projected onto the charged photoconductive member to record thereon an electrostatic latent image.

Abstract: An apparatus which regulates the duration of time a surface is illuminated. A document is illuminated and the light rays transmitted therefrom are formed into a light image which is projected onto the surface. The duration of time that the light image exposes the surface is regulated in accordance with the position of a device arranged to project the light image onto the surface.

Abstract: An optical system in which a continuous tone light image of an original document is formed. The optical system is arranged to illuminate the original document and to create a finely divided uniformly distributed light image. A selectable feature therein permits the formation of light images having differing tone gradations.

Abstract: An apparatus in which an electrostatic latent image is developed with electrostatically charged particles. A brush-like array of charged particles is positioned closely adjacent to the electrostatic latent image. A portion of the charged particles are separated from the brush-like array thereof. The separated charged particles are moved into contact with the latent image to render it visible.The foregoing abstract is neither intended to define the invention disclosed in the specification, nor is it intended to be limiting as to the scope of the invention in any way.

Abstract: An apparatus for developing a latent image on a charged photosensitive surface of a xerography printing machine has a magnetic brush assembly including a donor roll and a cleaning electrode adjacent to the roll for reducing the accumulation of toner particles as a coating on the roll surface.

Abstract: Toner for use in the development of latent electrostatic images comprised of a resinous material and a colorant in which the resinous material is comprised of at least two polymers, the first of which has a glass transition temperature of at least 20.degree.C., and the second of which has a glass transition temperature of at least 5.degree.C. lower than the glass transition of the first. The polyblend is either a graft or block copolymer comprised of the aforesaid polymers, or a physical blend of such polymers which are incompatible with each other, prepared by dissolving the polymers in a common solvent in which the polymers are about equally soluble, followed by vigorous agitation and removal of the solvent to provide an incompatible solid mixture of the polymer.

Abstract: A liquid electrophotographic developer and processes for employing same are disclosed. The developer is composed of a liquid carrier, pigment, and a resin which results in a developed image that is abrasion resistant. The developer contains from 5 to 70% of the resin component which comprises an epoxy-ester.

Abstract: An electrophotographic printing machine in which successive colored filtered light images expose a photoconductive member recording successive charge patterns thereon. Each charge pattern is developed with single color magnetic particles forming successive single color powder images on the photoconductive member. These single color powder images are transferred, in superimposed registration, to a sheet of support material. The superimposed powder images are permanently affixed to the sheet of support material producing a colored copy of the original document being reproduced by the electrophotographic printing machine.

Abstract: An electrophotographic printing machine in which an arcuate screen member has a curvature substantially equal to the curvature of an arcuate photoconductive member employed therein. The centers of curvature of the screen member and photoconductive member are located in substantial coincidence with one another.

Abstract: An electrostatographic printing machine in which a plurality of original documents are employed to create successive powder images which are transferred to a common sheet of support material. The sheet of support material is advanced along one of a plurality of selectable paths from a supply station to a receiving station. One path is arranged to move the sheet of support material to the receiving station. The other path is adapted to recirculate the sheet of support material so as to enable successive powder images to be transferred thereto. In operation, the first original is placed in the printing machine and the powder image corresponding thereto is transferred to the support material. Thereafter, the next original is placed in the printing machine and the support material is recirculated. The second powder image corresponding to the second original is then transferred to the support sheet.

Abstract: An electrophotographic printing machine and method of use therefor in which a plurality of light images of the same original document are formed. Each of the light images is of a different predetermined magnitude and irradiates a charged photoconductive member to record a plurality of electrostatic latent images thereof. The electrostatic latent images are developed with developer mixes having differing predetermined concentrations of toner particles therein. These developed powder images are transferred, in superimposed registration with one another, onto a common sheet of support material forming a high quality reproduction of the original document.

Abstract: A sheet of support material in which a non-fibrous image receiving portion has a fibrous portion secured thereto. The fibrous portion cooperates with a sheet feeding apparatus to facilitate the seriatim feeding of successive sheets of support material from a stack thereof.The foregoing abstract is neither intended to define the invention disclosed in the specification, nor is it intended to be limiting as to the scope of the invention in any way.

Abstract: An electrophotographic printing machine in which a screen moves from an inoperative position remote from a photoconductive member employed therein to an operative position closely adjacent thereto. As the screen moves from the operative position to the inoperative position, particles are cleaned therefrom. In addition, the spacing between the screen and photoconductive member is adjustable.

Abstract: A color electrostatographic printing machine in which successive single color powder images are transferred, in superimposed registration with one another, to an intermediary. This multi-layered powder image is fused on the intermediary and transferred therefrom to a sheet of support material forming a copy of the original document.

Abstract: An apparatus in which a sheet of support material having particles substantially permanently affixed thereto is separated from a heated fuser member. The heated fuser member is operatively associated with a back up member such that the sheet of support material passes therebetween. As the sheet of support material passes therebetween, the particles thereon contact the fuser member. In this manner, the particles are thermally fused to the sheet of support material. Thereafter the sheet of support material with the particles affixed thereto is separated from the fuser member.

Abstract: An apparatus in which the failure to remove an original document from a housing after the elapse of a preselected duration of time is detected.

Abstract: A latching apparatus including a housing having an aperture therein for receiving a key. Insertion of the key into the housing aperture rotates an actuating member from an open position to a closed position.

Abstract: An apparatus adapted to charge an image bearing member to a substantially uniform potential. The apparatus controls the area of the surface charged on the image bearing member so that it corresponds substantially in size to that of a sheet of support material arranged to have a copy of an original document reproduced thereon.

Abstract: A corona generating apparatus in which the coronode wires and grid wires thereof are cleaned to remove particles therefrom. A wiper is positioned within the shield contacting the coronode wires and grid wires. The wiper moves along the coronode wires and grid wires to remove contaminating particles therefrom.

Abstract: An apparatus in which a powder pattern deposited on a support material is permanently affixed thereto. The support material is heated during the movement thereof into thermal communication with a radiant energy output. In this manner, the powder pattern is coalesced and fixed permanently to the support material..[.The foregoing abstract is neither intended to define the invention disclosed in the specification, nor is it intended to be limiting as to the scope of the invention in any way..].