Abstract: A photoconductive member, comprises a support for a photoconductive member and an amorphous layer which is constituted of silicon atoms as matrix containing at least one of hydrogen atom and halogen atom and exhibits photoconductivity, said amorphous layer having a layer region containing oxygen atoms in at least a part thereof, the content of the oxygen atoms in said layer region being distributed unevenly in the direction of the thickness of said layer.

Abstract: A photoconductive member comprises a support, a photoconductive layer constituted of an amorphous material containing silicon atoms as matrix and containing hydrogen atoms or halogen atoms, and an intermediate layer provided between them, said intermediate layer having a function to bar penetration of carriers from the side of the support into the photoconductive layer and to permit passage from the photoconductive layer to the support of photocarriers generated in the photoconductive layer by projection of electromagnetic waves and movement of the photocarriers toward the side of the support, and said intermediate layer being constituted of an amorphous material containing silicon atoms and oxygen atoms as constituents.

Abstract: An electrophotographic light-sensitive element which is useful in the Carlson electrophotographic process is disclosed, comprising an electrically conductive support having provided thereon a photoconductive layer and a protective layer wherein said protective layer has a thickness of from 1 to 30 .mu.m and contains a powder of a metal oxide having a volume intrinsic resistance of 10.sup.11 .OMEGA..multidot.cm or less and a mean particle size of 0.3 .mu.m or less dispersed in a binder resin.

Abstract: A photosensitive member is formed by applying on an electrically conductive substrate, a first photoconductive layer sensitive to a visible light, an insulating charge retentive layer, and a second photoconductive layer sensitive to ultraviolet light, successively in this order. At first the photosensitive member is uniformly charged to a negative polarity, while the photosensitive member is uniformly exposed to the visible light. Then an image of a document to be copied is projected while the photosensitive member is charged to a positive polarity. After that the photosensitive layer is uniformly exposed to the visible light and finally the photosensitive member is uniformly exposed to the ultraviolet light. In this manner, an electrostatic charge image having high contrast and resolution is formed in the photosensitive member by means of charges which are stably trapped across the charge retentive layer.

Abstract: A photoconductive member comprises a support, a photoconductive layer constituted of an amorphous material containing hydrogen atoms or halogen atoms in a matrix of silicon atoms, and an intermediate layer constituted of an electrically insulating oxide having a layer thickness of 30 to 1000A, which is provided between said support and said photoconductive layer.

Abstract: A photoconductive member comprises a support, a photoconductive layer constituted of an amorphous material containing silicon atoms as matrix and containing hydrogen atoms or halogen atoms, and an intermediate layer provided between them, said intermediate layer having a function to bar penetration of carriers from the side of the support into the photoconductive layer and to permit passage from the photoconductive layer to the support of photocarriers generated in the photoconductive layer by projection of electromagnetic waves and movement of the photocarriers toward the side of the support, and said intermediate layer being constituted of an amorphous material containing silicon atoms and carbon atoms a constituents.

Abstract: A photoconductive member comprise a support, a photoconductive layer constituted of an amorphous material containing silicon atoms as matrix and containing hydrogen atoms or halogen atoms, and an intermediate layer provided between them, said intermediate layer having a function to bar penetration of carriers from the side of the support into the photoconductive layer and to permit passage from the photoconductive layer to the support of photocarriers generated in the photoconductive layer by projection of electromagnetic waves and movement of the photocarriers toward the side of the support, and said intermediate layer being constituted of an amorphous material containing silicon atoms and carbon atoms as constituents.

Abstract: A method for the preparation of electrostatic masters, and product prepared thereby, said masters having improved water and pick resistance for lithographic printing. The method comprises applying a barrier coat formulation to a substrate wherein the formulation contains an aqueous dispersion of a copolymer of at least about 60% ethylenically unsaturated polymerizable monomer having non-polar functionality and about 3 to about 40% of a polymerizable olefinically unsaturated monomer having polar functionality.

Abstract: A charge carrier member comprising an intermediate layer composed of a heat-resistant resin containing electrically conductive material, a charge carrier layer composed of a heat-resistant resin, and a support member. The support member is an electrically conductive support member or consists of an electrically conductive member which is provided on an insulating member. A method of forming a copy image which comprises a step for forming an electrostatic latent image on the charge carrier member, a step for converting the electrostatic latent image into a toner image using a developing agent, and a step for transferring the toner image onto a transfer medium.

Abstract: Disclosed is a panchromatic photoconductive element for electrophotography having a layered structure comprising a substrate, a barrier layer and a photoconductive layer. The barrier layer inhibits injection of carriers from the substrate. Amorphous silicon forms a matrix for either the photoconductive layer or the barrier layer.

Abstract: A photoconductive member which is stable in its electrical and optical characteristics, not influenced by circumstances for its use, and possesses extremely high sensitivity to light, remarkably high anti-photo-fatigue property, and deterioration-resistant against repeated use, the photoconductive member comprising a substrate; a photoconductive layer; a barrier layer between the substrate and the photoconductive layer, and having a function of substantially inhibiting injection of carriers from the substrate side to the photoconductive layer; and a depletion layer region formed in the interfacial region of the photoconductive layer and the barrier layer, wherein the photoconductive layer and the barrier layer are made of an amorphous material with silicon as a matrix and hydrogen as a constituent atom, a part of the barrier layer is present between the depletion layer region and the substrate in such a thickness that, in order to inhibit injection of the carriers having the same polarity as that of minority

Abstract: A function separated type electrophotographic light-sensitive member and a process for production thereof are described, said member comprising an electrically conductive support, a light-sensitive layer made of a hydrogen-doped amorphous silicon semiconductor, and an organic electric charge transport layer containing at least one positive charge transport carrier selected from the group consisting of pyrazolines, aryl-alkanes, arylketones, arylamines and chalcones.

Abstract: An electrostatic master having improved water, cockle and pick resistance for lithographic printing, and method for making the same, comprising a base, a barrier coat applied to said base, and a photoconductive layer containing a photoconductive material and binder applied to said barrier coat. The barrier coat preferably comprises a copolymer of at least 60% ethylenically unsaturated polymerizable monomer having non-polar functionality and about 3 to about 40% of a polymerizable olefinically unsaturated monomer having polar functionality. The barrier coat preferably contains about 2.5 to about 50% plastic particles based on the weight of the barrier coat. The barrier coat achieves improved water resistance at low coat weights, and thus can be applied without substantial change in conductivity.

Abstract: Disclosed is a laminated photosensitive material for electrophotography, which comprises a conductive substrate, an undercoat layer formed of a composition comprising a resin binder having no substantial photoconductivity and photoconductive zinc oxide in an amount of 1 to 20 parts by weight per part by weight of the resin binder, an intermediate layer formed of a composition comprising a polyvinyl carbazole type photoconductor and photoconductive zinc oxide in an amount of 1 to 20 parts by weight per part by weight of the photoconductor and a topcoat layer comprised of a polyvinyl carbazole type photoconductor.This laminated photosensitive material has a very high sensitivity and a high initial charge voltage in combination and provides an image having a high density and a high contrast.

Abstract: Electrophotographic element typically comprising in sandwiched arrangement a transition metal oxide layer and a photoconductive layer. When an electric field is applied across the element, preferably after inserting the element between a pair of electrode layers, and an optical image is projected onto the photoconductive layer, the resulting conductivity pattern in the photoconductive layer causes corresponding coloration in the transition metal oxide layer, thereby visibly recording the optical image.

Abstract: An electrophotographic photosensitive member comprising an electric charge injection layer, an amorphous photoconductive layer on said charge injection layer, and an insulating layer on said amorphous photoconductive layer, said charge injection layer containing halogen as an impurity.

Abstract: The present invention resides broadly in a method for the preparation of paper having improved water and/or solvent resistance which comprises applying to a base paper a plastic particle containing formulation, and then wetting the formed coating with a solvent to which the plastic particles are sensitive. The present invention is particularly applicable to the preparation of electrostatic paper masters of improved water resistance for lithographic printing having a photoconductive layer and a barrier coat to which the photoconductive layer is applied. The barrier coat contains a binding amount of a binder resin and filler at least a portion of which is an amount of said plastic particles sensitive to the solvent system of the photoconductive layer, the amount of plastic particles and sensitivity being sufficient to materially increase water resistance.

Abstract: The present invention resides broadly in a method for the preparation of paper having improved water and/or solvent resistance which comprises applying to a base paper a plastic particle containing formulation, and then wetting the formed coating with a solvent to which the plastic particles are sensitive. The present invention is particularly applicable to the preparation of electrostatic paper masters of improved water resistance for lithographic printing having a photoconductive layer and a barrier coat to which the photoconductive layer is applied. The barrier coat contains a binding amount of a binder resin and filler at least a portion of which is an amount of said plastic particles sensitive to the solvent system of the photoconductive layer, the amount of plastic particles and sensitivity being sufficient to materially increase water resistance.

Abstract: An imaging member which is comprised of a substrate, an injecting contact, or hole injecting electrode overlaying the substrate, a charge transport layer comprised of an electrically inactive organic resin having dispersed therein an electrically active material, a combination of which is substantially non-absorbing to visible electromagnetic radiation but allows the injection of photogenerated holes from a charge generator layer in contact with the injecting contact and electrically induces holes from the layer of injecting material, a layer of charge generator material on and in operative connection with the charged transport layer and finally a layer of insulating organic resin overlaying the layer of charge generating material. The hole injecting electrode includes materials such as trigonal selenium, selenium dioxide, arsenic, tellurium, and alloys of selenium such as arsenic-selenium-tellurium.

Abstract: The present invention resides broadly in a method for the preparation of paper having improved water and/or solvent resistance which comprises applying to a base paper a plastic particle containing formulation, and then wetting the formed coating with a solvent to which the plastic particles are sensitive. The present invention is particularly applicable to the preparation of electrostatic paper masters of improved water resistance for lithographic printing having a photoconductive layer and a barrier coat to which the photoconductive layer is applied. The barrier coat contains a binding amount of a binder resin and filler at least a portion of which is an amount of said plastic particles sensitive to the solvent system of the photoconductive layer, the amount of plastic particles and sensitivity being sufficient to materially increase water resistance.

Abstract: A layer of amorphous silicon containing H, preferably 10-40 atomic %H, is used as a photoconductive layer for electrophotographic photosensitive member.

Abstract: An improved heat-developable photosensitive material is disclosed which comprises an infrared rays-absorbing layer provided in contact with or adjacent to a layer comprising a reducible organic silver salt.

Abstract: An electrophotographic photosensitive member comprises a base, a photoconductive layer and an insulating layer, and the photoconductive layer contains an intermediate layer formed at the base side of the photoconductive layer. The intermediate layer facilitates injection of electric charge.

Abstract: This invention relates to an electrophotographic imaging member or device and an imaging method using this imaging member, which member or device is comprised of a substrate, a layer of a charge carrier injecting material comprised of carbon or graphite dispersed in a polymer, a layer of a charge carrier transport material, a layer of a photoconductive charge carrier generating material and an electrically insulating overcoating layer.