Xerox Corporation

Other

Gaf Corporation

John W Weigl

Joseph C Mammino

Robert M Ferguson

Joseph Fantuzzo

Louis D Mailloux

John B Wells

Edward Forest

Carl G Brynko

Paul C Swanton

William M Reilich

Alan Amidon

Positive form overlays are used to make composite images with a positive mode xerographic printer having a laser scan exposure mechanism. The laser scan or electronic exposure mechanism uses an oscillating galvanometer mirror to sweep a scanning spot over a cylindrical shape photoconductor. The xerographic processor includes a transfer drum able to recycle a sheet relative to the photoconductor to transfer at least two sequentially generated xerographic toner images to the same side of the same support in registration. One image is made in response to electronic signals and the other from the positive overlay thereby yielding a composite toner image.

Positive overlay electronic xerographic printer

A novel screen stencil comprising a screening material coated with a photo-swellable material, as well as a method of preparing and process of using same, are disclosed.

Photographic screen stencil printing process

A magnetographic imaging member is provided which includes a photoconductive layer sandwiched between a transparent conductive substrate and an overcoating of magnetic particles dispersed in a dielectric material. A magnetic latent image is formed in the member by first producing an electrostatic latent image on the premagnetized dielectric coating and developing it with a thermal radiation reflective toner. The surface is then subjected to thermal radiation which demagnetizes the pigment in the overcoating by raising it to a temperature above its Curie point except in the areas where the developed electrostatic image reflects the heat. The latent magnetic image can be repetitively developed with magnetic toner.

Magnetographic imaging member and the method of its use

An electrostatographic imaging method employing polar liquid development comprising developing an electrostatic charge pattern present on an electrostatographic imaging surface by first contacting said imaging surface with a thin dielectric web, developing said electrostatic latent image on said interposed dielectric web with a polar liquid developer and transferring said developer from said dielectric film to a receiver sheet in image configuration.

Apparatus for interposition environment

An electrostatic recording element suitable for use as a receiving sheet in an electrostatic transfer process, consisting essentially of: a translucent, non-conductive base selected from the group consisting of paper, a polyester film, and a polyvinyl fluoride film; a photoconductive layer on the surface of said base comprising a photoconductive zinc oxide and a dye sensitizer suspended in an insulating resin binder selected from the group consisting of a vinyl acetate - crotonic acid copolymer and epoxy esters; and a dielectric polymer resin film overlying said photoconductive layer selected from the group consisting of polyvinyl acetate, vinyl acetate - crotonic acid copolymer, and acrylonitrile - styrene copolymer.

Material for electrostatic recording

Antistatic footwear uses a conductive layer above a bottom dielectric layer and extending to the peripheral edge of of the bottom layer to form a discharge edge emitting at least a portion of the static electricity built up with movement of the wearer. The discharge automatically keeps the electrostatic charge to a relatively low level, either eliminating or reducing the intensity of any spark occurring when the wearer touches a grounded object, and yet the wearer is preferably insulated from ground to prevent hazardous electrical grounding of the wearer. The static electric potential on the wearer can be lowered further by forming a conductive path from the conductive layer to the underside of the bottom layer.

Antistatic footwear

Disclosed is a photosensitive device for use in electrostatographic copying. The device comprises: A. an endless, arcuate substrate; and B. a thin, conductive filament having a layer on its surface of a photoconductive insulating material wrapped in helical configuration around said substrate. The filament is connected to ground or to a suitable bias source. In one embodiment of the invention, the filament layer is overcoated with a thin layer of an insulating organic resin to provide a device with a dielectric storage layer on its exposed surface. In another embodiment, the overcoating is not applied thereby providing an electrostatographic gravure member suitable for use with certain liquid developed imaging techniques.

Electrostatographic gravure member

Disclosed is an improved method for the preparation of an electrostatographic photoreceptor comprised of a layer of an organic active transport or insulating material overcoating a layer of a photoconductive material in operative connection with a conductive substrate. The method involves preparing a uniform liquid dispersion of the organic material in an appropriate solvent as a carrier phase having a pigmentary photoconductive material dispersed in it as a dispersed phase. The liquid dispersion is coated onto a conductive substrate and exposed to a direct stream of corona ions or a high intensity DC electric field, without contacting its surface with an electrode, to cause separation of the two phases into a two layered structure with the layer of photoconductive material being deposited between the substrate and the solution of organic material. Drying the structure by removing the solvent for the organic material provides the finished photoreceptor.

Method for the preparation of electrostatographic photoreceptors

An electrophoretic imaging process wherein a suspension of particles in a carrier liquid are placed between a photoconductive electrode and a second electrode. With an electrical field applied between the photoconductive electrode and the second electrode the photoconductor is exposed to imagewise radiation which causes particles on the surface of the photoconductive electrode to be driven away in image configuration by charge exchange with the photoconductive electrode. The migrating particles form a negative image on the second electrode leaving a positive image behind on the photoconductive electrode.

Electrophoretic imaging members

An induction imaging process wherein the electrophotographic imaging member comprises at least three separate and distinct layers; namely, a conductive substrate, a photoconductive insulating layer and an insulating film overcoating the free surface of the photoconductive insulating layer. This process provides an efficient route for latent image formation, development and erasure of charge carriers trapped at the interface of the insulating overcoating and the layer contiguous with said coating. This process is especially suitable for use in combination with polar liquid development.

Growing community of inventors

West Webster, NY, United States of America

John W Weigl