Abstract: A process for forming an overcoated electrophotographic imaging member comprising applying on an electrophotographic imaging member a coating in liquid form comprising a cross-linkable siloxanol-colloidal silica hybrid material having at least one silicon bonded hydroxyl group per every three --SiO-- units and a catalyst for the cross-linkable siloxanol-colloidal silica hybrid material, the coating in liquid form having an acid number less than about 1 and curing the cross-linkable siloxanol-colloidal silica hybrid material until the siloxanol-colloidal silica hybrid material forms a hard cross-linked solid organosiloxane-silica hybrid polymer layer.

Abstract: A printing member for electrostatic photocopying, comprises a substrate having a conductive surface and a photoelectric-sensitive, electrically chargeable layer deposited on the conductive surface of the substrate. The electrically chargeable layer has a non-single crystal semiconductor layer having a built-in-potential, or the non-single crystal semiconductor layer and an insulating or semi-insulating layer.

Abstract: A photoconductive assembly comprising a conductive substrate, a photoconductive layer and a topcoat comprised of a cured film-forming silicone polymer. The topcoat has a thickness of between 5 and 300 nm and a melting point above 100.degree. C.

Abstract: A printing member for electrostatic photocopying, comprises a substrate having a conductive surface and a photoelectric-sensitive, electrically chargeable layer deposited on the conductive surface of the substrate. The electrically chargeable layer has a non-single crystal semiconductor layer having a built-in-potential, or the non-single crystal semiconductor layer and an insulating or semi-insulating layer.

Abstract: A process for forming an overcoated electrophotographic imaging member comprising applying on an electrophotographic imaging member a coating in liquid form comprising a cross-linkable siloxanol-colloidal silica hybrid material having at least one silicon bonded hydroxyl group per every three --SiO-- units on the electrophotographic imaging member and a hydrolyzed ammonium salt of an alkoxy silane having the formula ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 are independently selected from the group consisting of aliphatic and substituted aliphatic radicals having 1 to 4 carbon atoms, R.sub.4 is selected from the group consisting of aliphatic radicals, substituted aliphatic radicals and the group ##STR2## wherein y is a number from 2 to 4, and R.sub.

Abstract: A photoconductive member comprises a substrate for photoconductive member and a light receiving layer having photoconductivity comprising an amorphous material containing silicon atoms and germanium atoms, said light receiving layer containing nitrogen atoms and having a first layer region, a third layer region and a second layer region with the nitrogen atom content in the layer thickness direction of C(1), C(3) and C(2), respectively, in the order from the substrate side (with the proviso that when C(3) cannot solely be the maximum and either one of C(1) and C(2) is zero, the other two are not zero and not equal to each other, or when C(3) is zero, the other two are not zero, or when none of C(1), C(2) and C(3) is zero, the three of C(1), C(2) and C(3) cannot be equal at the same time and C(3) cannot solely be the maximum).

Abstract: A printing member for electrostatic photocopying, comprises a substrate having a conductive surface and a photoelectric-sensitive, electrically chargeable layer deposited on the conductive surface of the substrate. The electrically chargeable layer has a non-single crystal semiconductor layer having a built-in-potential, or the non-single crystal semiconductor layer and an insulating or semi-insulating layer.

Abstract: An electrophotographic imaging member is disclosed comprising a charge generation layer, a contiguous charge transport layer comprising an aromatic amine or hydrazone charge transport molecule in a continuous polymeric binder phase, and a cellulosic hole trapping material located on the same side of the charge transport layer as the charge generation layer, the cellulosic hole trapping material being free of electron withdrawing groups and having the structural formula ##STR1## wherein R is independently selected from the group consisting of hydrogen and a substituted or unsubstituted group selected from the group consisting of an alkyl group containing 1 to 20 carbon atoms, a hydroxyalkyl group containing 1 to 20 carbon atoms, a hydroxyether group containing 1 to 20 carbon atoms and an aminoalkyl group containing 1 to 20 carbon atoms, and n is the number of cellulose repeating units from 1 to 3,000. A process for using this electrophotographic imaging member is also disclosed.

Abstract: A printing member for electrostatic photocopying, comprises a substrate having a conductive surface and a photoelectric-sensitive, electrically chargeable layer deposited on the conductive surface of the substrate. The electrically chargeable layer has a non-single crystal semiconductor layer having a built-in-potential, or the non-single crystal semiconductor layer and an insulating or semi-insulating layer.

Abstract: A printing member for electrostatic photocopying, comprises a substrate having a conductive surface and a photoelectric-sensitive, electrically chargeable layer deposited on the conductive surface of the substrate. The electrically chargeable layer has a non-single crystal semiconductor layer having a built-in-potential, or the non-single crystal semiconductor layer and an insulating or semi-insulating layer.

Abstract: A multi-layered photoconductive material which comprises first layers containing at least one VIb chalcogen element chosen from S, Se and Te and second layers containing at least one IIb element chosen from Zn, Cd and Hg and acting as electric potential barriers, said first layers and said second layers being alternatively arranged and the total number of said first layers and said second layers being not less than 5 and has a high response speed and an excellent sensitivity to long wavelength light with a great dark resistance.

Abstract: A photoconductive member comprises a substrate for photoconductive member and a light receiving layer provided on said substrate having a layer consititution in which a first layer region (G) comprising an amorphous material containing germanium atoms and a second layer region (S) exhibiting photoconductivity comprising an amorphous material containing silicon atoms are successively provided from the substrate side, said light receiving layer containing oxygen atoms together with a substance for controlling conductivity (C) in a distributed state such that, in said light receiving layer, the maximum value C(PN).sub.max of the content of said substance (C) in the layer thickness direction exists within said second layer region (S) or at the interface with said first layer region (G) and, in said second layer region(S), said substance (C) is distributed in greater amount on the side of said substrate.

Abstract: An image-forming member for electro-photography has a photoconductive layer comprising a hydrogenated amorphous semiconductor composed of silicon and/or germanium as a matrix and at least one chemical modifier such as carbon, nitrogen and oxygen contained in the matrix.

Abstract: A photoresponsive imaging member with acceptable residual voltages at from about 20 percent to about 80 percent relative humidities consisting of inorganic or organic photoconductive substances, and as a release protective coating thereover a dispersion of colloidal silica and a hyroxylated silsesquixone in an alcoholic medium, which overcoating is of a thickness of from about 0.2 micron to about 1.5 microns.

Abstract: A plate for use in lithographic printing which comprises providing a photoconductive layer on an electrically conductive substrate and further providing thereon a surface layer (a hydrophilicable layer) consisting essentially of a reaction product of a resin having an acid anhydride group with a crosslinking agent.

Abstract: An electrophotographic light-sensitive material is described, comprising an electrically conductive support, an amorphous silicon photoconductive layer on the support, and a layer of amorphous material containing at least carbon and halogen atoms is provided on the photoconductive layer. This material is free from a serious reduction in resolving power as is encountered in conventional electrophotographic light-sensitive materials when they are exposed to corona discharge, particularly negative corona discharge under high temperature/humidity conditions.

Abstract: A photoconductive member having a support, amorphous charge generation and charge transport layers and a barrier layer between the support and the charge generation layer. The charge generation layer contains from 0.1 to 10 atomic percent of a conduction controlling impurity. Intermediate and surface barrier layers are also employed and additional transport layers are utilized.

Abstract: A printing member for electrostatic photocopying, comprises a substrate having a conductive surface and a photoelectric-sensitive, electrically chargeable layer deposited on the conductive surface of the substrate. The electrically chargeable layer has a non-single crystal semiconductor layer having a built-in-potential, or the non-single crystal semiconductor layer and an insulating or semi-insulating layer.

Abstract: An electrophotographic photosensitive material comprising a conductive support having thereon, in succession, a photoconductive layer composed of an amorphous material containing silicon atom and a barrier layer mainly composed of carbon and silicon, nitrogen and silicon, or oxygen and silicon, and further on the barrier layer a surface improvement layer having a composition of carbon and silicon of from 0.70/1 to 0.95/1 by atomic ratio in carbon/carbon+silicon, and the composition ratio being larger than that of the barrier layer.

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

Abstract: Disclosed is an electrophotographic photoresponsive device comprised of a supporting substrate, an amorphous silicon charge transport layer, a trapping layer comprised of doped amorphous silicon, and a top insulating overcoating layer.

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 carbon atoms in at least a part thereof, the content of the carbon atoms in said layer region being distributed unevenly in the direction of the thickness of said layer.

Abstract: In an electrophotographic photosensitive device including a conductive layer, a selenium based photoconductive layer and a transparent insulating layer which are sequentially laminated, the conductive layer is formed of an aluminum substrate conductive layer, a zinc conductive layer a copper conductive layer, and silver conductive layer which are sequentially laminated to each other. As a result of this structure, the charge injection characteristic of the photosensitive device during primary charging is improved, and the charge injection preventing characteristic during the simultaneous secondary charging and image exposure steps is sufficiently maintained. The conductive layers contact each other intimately. The electrophotographic photosensitive device is highly humidity durable and exhibits a long life and can obtain high electrostatic contrast.

Abstract: In an electrophotographic photosensitive device including a conductive layer, a selenium based photoconductive layer and a transparent insulating layer which are sequentially laminated, the conductive layer is formed by an aluminum substrate conductive layer, a zinc conductive layer (or a zinc conductive layer and a copper conductive layer), and a nickel conductive layer which are sequentially laminated to each other. As a result of this structure, the charge injection characteristic during the primary charging step is improved, and the charge injection preventing characteristic during the simultaneous secondary charging and image exposure steps is sufficiently maintained. The conductive layers contact each other intimately. The electrophotographic photosensitive device exhibits a high humidity durability and a long life and can obtain high electrostatic contrast.

Abstract: An imaging method comprising providing a migration imaging member comprising a substrate and an electrically insulating softenable layer on the substrate, the softenable layer comprising migration marking material located at least at or near the surface of the softenable layer spaced from the substrate and a charge transport material in the softenable layer, electrostatically charging the member, exposing the member to activating radiation in an imagewise pattern, decreasing the resistance to migration of marking material in the softenable layer sufficiently to allow slight migration in depth of marking material towards the substrate in image configuration, and further decreasing the resistance to migration of marking material in the softenable layer sufficiently to allow nonmigrated marking material to agglomerate.

Abstract: This invention relates to a migration imaging member comprising a substrate and an electrically insulating softenable layer on said substrate, said softenable layer comprising migration marking material located at least at or near the surface of said softenable layer spaced from said substrate and a charge transport molecule.

Abstract: A photoconductive member is provided, which comprises a support for photoconductive member and a light receiving layer with a layer constitution, comprising a first layer region containing at least germanium atoms of which at least a portion is crystallized, a second region comprising an amorphous material containing at least silicon atoms and germanium atoms, a third layer region comprising an amorphous material containing at least silicon atoms and exhibiting photoconductivity, and a fourth layer region comprising an amorphous material containing silicon atoms and carbon atoms, provided successively in the order mentioned from the said support side.

Abstract: An electrophotographic photosensitive member has a selenium type photoconductive layer containing 8000 ppm or less oxygen based on selenium. The member is free from a fatigue due to repeated use.

Abstract: An imaging member comprising a substrate, an electrically insulating swellable, softenable layer on the substrate, the softenable layer having particulate migration marking material located at least at or near the surface of the softenable layer spaced from the substrate, and a protective overcoating comprising a film-forming resin, a portion of which extends beneath the surface of the softenable layer. This migration imaging member may be prepared with the aid of a material which swells at least the surface of the softenable layer to allow the film-forming resin to penetrate beneath the surface of the softenable layer.

Abstract: A photosensitive member for electrophotography basically comprises a conductive support, on the surface of which a photoconductive layer and a transparent insulating layer are sequentially laminated. The photosensitive member is adapted to be used in a process for forming an electrostatic latent image including sequential steps of a primary corona charging concurrent with imagewise exposure, a secondary corona charging and a flush irradiation. The surface of the conductive support is treated to a mirror finish, based on experimental finding that the contrast voltage of the latent image depends on the degree of surface roughness of the support.

Abstract: This invention is directed to an improved photoresponsive device comprised of a substrate, a hole transport layer, an adhesive layer, an organic photoconductive layer sensitive to infrared radiation, an inorganic photogenerating layer, and an optional polymeric overcoating layer.

Abstract: A novel method and apparatus for electrophotography is disclosed which enables selection the mode of image formation among positive-positive, negative-positive and combinations thereof without any need of changing the polarity of developing toner. The present invention is made on the basis of a known electrophotographic system in which a photosensitive member composed of essentially an electrically conductive substrate, a photoconductive substance layer and an insulating surface layer and which comprises the steps of charging the insulating surface layer, image-wise exposing it to light so as to form a first image almost simultaneously with or some time after the charging step, subjecting it to corona discharge with nearly simultaneous image-wise exposure so as to form a second image and uniformly exposing the whole surface of the photosensitive medium to light so as to form an electrostatic latent image corresponding to a composite image resulting from the first and second images.

Abstract: The surface properties of solid substrates are improved by the formation of discrete sites of inorganic materials on one surface of the substrate.

Abstract: An electrophotographic recording material comprised of an electrically conductive support, an optional insulating interlayer, a photoconductive system comprised of at least one layer of organic material containing a charge carrier-producing compound and a charge-transporting compound, and a radiation-cured, transparent protective layer, wherein the protective layer has been applied onto the surface of the photoconductive system with the aid of a removable auxiliary support and is comprised of an acrylated binder which is cured by irradiation with ultraviolet light. Also disclosed is a process for the production of the recording material.

Abstract: An image-forming member for electrophotography has a photoconductive layer comprising a hydrogenated amorphous semiconductor composed of silicon and/or germanium as a matrix and at least one chemical modifier such as carbon, nitrogen and oxygen contained in the matrix.

Abstract: This invention provides a process for making image overlay through the steps constituting an electrophotographic process, and also an apparatus adapted for conducting such process. The process, based on an electrophotographic process utilizing a three-layered photosensitive member having an insulating cover layer, comprising exposing the photosensitive member to a first image-forming irradiation to be overlaid substantially simultaneously with or subsequent to a charging on the surface of the insulating layer, then exposing the photosensitive member to a second image-forming irradiation to be overlaid substantially simultaneously with an AC or DC corona discharge given to the photosensitive member, and subsequently giving a uniform exposure to the surface of said photosensitive member thereby obtaining an electrophotographic overlay image of the first and second irradiations.

Abstract: An electrophotographic image-forming member comprises a substrate for electrophotography and an amorphous layer which is laid on said substrate and constituted of silicon atoms as matrix containing at least one of hydrogen atom and halogen atom and exhibits photoconductivity, said substrate being constituted of aluminum oxide containing chemi-structurally water at least on the surface thereof, and said amorphous layer having a layer region containing at least one member selected from the group consisting of oxygen atom, nitrogen atom and carbon atom in at least a part thereof, the content of said member in said layer region being distributed unevenly in the direction of the thickness of said layer.

Abstract: An electrophotographic photosensitive material is disclosed. The material is comprised of a conductive support base. On the surface of the base is a photoconductive layer. On a surface of the photoconductive layer is an interlayer comprised of organic metal compound as its main component. On top of the interlayer is a low-resistant protective layer. The material can achieve electrostatic contrast greatly superior to that of conventional photosensitive materials.

Abstract: A photoconductive member comprising a support for photoconductive member, a photoconductive layer constituted of an amorphous material comprising silicon atom as a matrix and a barrier layer between said support and said photoconductive layer, said barrier layer having a double-layer structure of a first barrier layer constituted of an amorphous material comprising silicon atom as a matrix and containing impurities which control the property of conductivity and a second barrier layer constituted of an electrically insulating material different from said amorphous material constituting said first barrier layer.

Abstract: The present invention relates to a method for covering a substrate with a cylindrically shaped heat-shrinkable film, particularly to a method for covering a cylindrically shaped heat-shrinkable film so as to fit the contour of a substrate by conducting the heat treatment in multiple steps at different temperatures.

Abstract: A process for forming an overcoated electrophotographic imaging member by applying a coating of a cross-linkage siloxanol-colloidal silica hybrid material on an electrophotographic imaging member and thereafter contacting the coating with a fugitive ammonia gas condensation catalyst until the siloxanol-colloidal silica hybrid material forms a cross-linked solid layer. The cross-linkable siloxanol-colloidal silica hybrid material may be prepared by hydrolyzing trifunctional organosilanes and stabilizing the hydrolyzed silanes with colloidal silica. The electrophotographic imaging member may comprise inorganic or organic photoconductive components in one or more layers.

Abstract: An electrophotographic photosensitive material having a long lifetime can be provided by forming an amorphous silicon layer having a thickness of 0.01-0.08 .mu.m on the photoconductive layer on the electrically conductive substrate in the said material without changing the characteristics of the photoconductive layer.

Abstract: An image-holding member for holding electrostatic images or toner images comprising a support and an image-holding layer contains a curable rubber layer.

Abstract: This invention is directed to an improved photoresponsive device containing as a protectant overcoating a top layer of a crosslinked polyvinylsilicate resulting from the reaction of polysilicic acid with a polyvinyl alcohol having a number average molecular weight of from about 10,000 to about 100,000.

Abstract: An image-holding member for holding electrostatic images and/or toner images comprising an insulating layer on the surface, the insulating layer being composed mainly of a fluorine-containing surface active agent, a lubricant and a resin.

Abstract: A photosensitive member for electrophotography comprises a first and a second photoconductive layer sequentially formed on a conductive layer. The first photoconductive layer has a spectral sensitivity extending over a range of light rays from ultraviolet rays to visible light. The second photoconductive layer is of light transmissibility, which is formed with a single or a compound layer and has a filtering action to transmit only light of longer wavelengths than a given one so as to define a range of light incident upon the first photoconductive layer, and a spectral sensitivity only to rays of shorter wavelengths than the given one.

Abstract: A printing member for electrostatic photocopying, comprises a substrate having a conductive surface and a photoelectric-sensitive, electrically chargeable layer deposited on the conductive surface of the substrate. The electrically chargeable layer has a non-single crystal semiconductor layer having a built-in-potential, or the non-single crystal semiconductor layer and an insulating or semi-insulating layer.

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: In an electrophotographic photosensitive member having a photoconductive layer composed of a photoconductive material and a binder, improvement wherein said binder is a curable rubber.

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.