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US 4,057,340 AGranted
Single component color development system
AssigneeXerox Corporation
InventorLloyd F. Bean
Life of this patent
Estimating the term…
Abstract
An apparatus in which a latent image is developed with particles. A support member advances the particles from a storage chamber to the development zone. In the development zone, the particles are separated from the support member and attracted to the latent image. This develops the latent image with these particles.
Claims21
An apparatus for developing a latent image with particles, including:
- a housing defining a chamber for storing a supply of particles therein;
- a cylindrical member mounted rotatably in the chamber of said housing, said cylindrical member having a plurality of apertures therein with each aperture being smaller in size than the size of the smallest particle attracted thereto;
- a blower mounted interiorly of said cylindrical member and arranged to generate an inwardly directed flow of air from the surface of said cylindrical member to the interior thereof forming a pressure differential attracting the particles thereto;
- and
- means for separating the particles from said cylindrical member as the particles advance to the development zone, wherein said cylindrical member positions the particles closely adjacent to the latent image.
2 more elements
An electrostatographic printing machine of the type having a latent image corresponding to an original document being reproduced recorded on a member, wherein the improvement includes:
- a housing defining a chamber for storing a supply of particles therein;
- a cylindrical member mounted rotatably in the chamber of said housing, said cylindrical member having a plurality of apertures therein with each aperture being smaller in size than the size of the smallest particle attracted thereto;
- a blower mounted interiorly of said cylindrical member and arranged to generate an inwardly directed flow of air from the surface of said cylindrical member to the interior thereof forming a pressure differential attracting the particles thereon;
- and
- means for separating the particles from said cylindrical member as the particles advance to the development zone, wherein said cylindrical member positions the particles closely adjacent to the latent image recorded on the member.
2 more elements
An electrophotographic printing machine for reproducing a colored original document on a sheet of support material, including:
- a photoconductive member;
- means for exposing said photoconductive member to successive color filtered light images to record successive latent images thereon, each latent image corresponding substantially to a discrete color contained in the original document;
- means for developing each latent image recorded on said photoconductive member with single color non-magnetic particles forming successive single color powder images on said photoconductive member, said developing means comprising a frame member mounted rotatably in the printing machine, a plurality of housings mounted on said frame member, each of said housings defining a chamber for storing a supply of differently colored non-magnetic particles, a plurality of cylindrical members, each of said cylindrical members being mounted rotatably in the chambers of said housings and having a plurality of apertures therein with each aperture being smaller in size than the size of the smallest particle attracted thereto, a blower mounted interiorly of said cylindrical member and arranged to generate an inwardly directed flow of air from the surface of said cylindrical member to the interior thereof forming a pressure differential attracting the particles thereto;
- and means for separating the single color non-magnetic particles from said cylindrical members as the single color non-magnetic particles advance to the development zone, wherein said cylindrical members position the single color non-magnetic particles closely adjacent to the corresponding latent image recorded on said photoconductive member;
- means for transferring, in superimposed registration, successive single color powder images from said photoconductive member to the sheet of support material;
- and
- means for fixing substantially permanently the superimposed powder images to the sheet of support material forming a colored copy of the original document.
4 more elements
Dependencies are inferred from the claim text.