Abstract: The present invention provides a method for preparing a selenium type electrophotographic element comprising the steps of processing the surface of an electrically conductive substrate which has a metal surface by vibrating and sliding a grindstone until a predetermined surface-roughness is obtained and thereafter vapordepositing thereon selenium, selenium alloy or selenium compound in a usual manner.

Abstract: A support for electrophotographic plate-making material comprising (1) a paper base; (2) a polyolefin layer on both sides of the paper base, wherein the polyolefin layer has a volume electric resistance of 10.sup.10 .OMEGA. or less; and (3) an ionomer coated between the paper base and the polyolefin layer, wherein the ionomer is prepared by ion-crosslinking a copolymer comprising at least one .alpha.-olefin and at least one .alpha.,.beta.-ethylenically unsaturated carboxylic acid with a monovalent, divalent or trivalent ion of a metal of Group I, II, III, IV-A or VIII of the periodic table.

Abstract: An electrophotographic lithographic printing material comprised of a conductive support, an interlayer, and a photoconductive layer is disclosed. The conductive support is comprised of a conductive paper laminated with carbon-containing polyethylene on both surfaces thereof using, as the interlayer, a polymer having the constructing units shown by following formulae and an acid value of 10 to 100; ##STR1## wherein R.sub.1 represents a hydrogen atom or a methyl group, R.sub.2 represents a hydrogen atom, a methyl group, or an ethyl group; and n is an integer of 1 to 10, ##STR2## wherein R.sub.3 represents a hydrogen atom or a methyl group.

Abstract: An electrostatographic imaging system comprising an insulating layer having an imaging surface, a conductive substrate for the insulating layer, means to form an electrostatic latent image on the imaging surface, means to form a toner image on the imaging surface in conformance to the electrostatic latent image and means to supply a variable direct current voltage to the conductive substrate. The electrostatographic imaging system may include an electrically conductive member parallel to and spaced from the imaging surface and a means to supply a variable electrical bias to the electrically conductive member in response to a change in the value of direct current voltage supplied to the conductive substrate.

Abstract: Compositions comprising a polymer and dendrite crystals of a salt consisting of the cation of 2-(4,5-dihydronaphtho[1,2-d]-1,3-dithiole-2-ylidene)-4,5-dihydronaphtho [1,2-d]-1,3-dithiole and an anion are useful in forming conductive coatings.

Abstract: An electrophotographic photoreceptor comprising a conductive layer and a photosensitive layer of vapor-deposited selenium-antimony alloy film formed thereon is disclosed. The photosensitive layer has an average antimony concentration of 5 to 21 wt % and the center layer thereof except for the skin layer on either side has a change in antimony concentration within 2 wt % in any region that is 1000 deep .ANG. from the surface of the skin layer.

Abstract: An improved layered photoresponsive imaging device consisting of(1) a supporting substrate,(2) a photogenerating layer comprised of a charge carrier photogenerating pigment dispersed in a resinous binder,(3) a hole carrier transport layer, comprised of molecules of the formula ##STR1## dispersed in a highly insulating and transparent organic resinous material, wherein an X is selected from the group consisting of (ortho) CH.sub.3, (meta) CH.sub.3, (para) CH.sub.3, (ortho) Cl, (meta) Cl, (para) Cl, and a hole injecting electrode strip comprised of carbon black particles and graphite particles dispersed in a resinous binder, which strip is attached to and extends the length of the non-image areas of the hole carrier transport layer.

Abstract: Compositions comprising a polymer and dendrite crystals of a salt consisting of the cation of 2-(4,5-dihydronaphtho[1,2-d]-1,3-dithiole-2-ylidene)-4,5-dihydronaphtho [1,2-d]-1,3-dithiole and an anion are useful in forming conductive coatings.

Abstract: An electrically activatable recording (EAR) element capable of producing a positive image comprises an electrically activatable recording layer comprising a transition metal complex selected from the group consisting of Group VIIIB and Group IB metal complexes in a film forming ionic polymer that is capable of undergoing an imagewise reorientation upon exposure to electric current and, upon such exposure, development of an image in the exposed areas of the recording layer is restricted. The recording element is light handleable and provides a non-silver positive image upon exposure and processing.

Abstract: An electrostatic master for lithographic printing characterized by a base, a barrier coat thereon, and a photoconductive layer. The barrier coat includes a hydrophobic thermoplastic film-forming resin having labile hydrogen-containing functional groups and a conductive agent. The conductive agent is a quaternary ammonium salt. The salts have only a minimal effect on water resistance and result in excellent reduction in the dielectric characteristics of the barrier coat.

Abstract: In an electrically activatable recording element and process comprising a polymeric electrically active conductive layer improvements are provided wherein the polymeric electrically active conductive layer comprises a polymer that has recurring units represented by the structure: ##STR1## wherein R is hydrogen or alkyl containing 1 to 20 carbon atoms;R.sup.1 and R.sup.3 are individually hydrogen or methyl;R.sup.2 is alkyl containing 2 to 20 carbon atoms;x is 0 or 1;y is 0 to 4;R.sup.4 is C.sub.6 H.sub.5-z X.sub.z ; wherein z is 1 to 5;X is chlorine, bromine or iodine;n is 40 to 100 weight percent;and the polymer has a glass transition temperature within the range of 20.degree. C. to 40.degree. C.

Abstract: In an electrically activatable recording (EAR) element comprising an electrically conductive support bearing (a) a first layer, and, contiguous to the first layer, (b) an electrically activatable recording layer, image formation in the electrically activatable recording layer is aided when the first layer (a) consists essentially of a compound selected from the group consisting of silver chlorides, silver bromides, silver iodides, transition metal bromides, transition metal chlorides, alkali metal chlorides, alkali metal bromides, alkali metal iodides, mixed chlorides, bromides and iodides of such metals and combinations of such compounds. The EAR element is light handleable when free of photosensitive silver halide and provides an image, after electrically activated exposure by dry development processing or by processing in a processing solution or bath.

Abstract: The hydrogenated amorphous silicon photoconductive layer has an infrared spectrum containing a peak at 880.+-.10 cm.sup.-1 (intensity of this peak being referred to as I.sub.A) and a peak at 970.+-.10 cm.sup.-1 (intensity of this peak being referred to as I.sub.B) in the infrared spectrum, the ratio I.sub.A /I.sub.B, being not more than 1.0.

Abstract: An electrostatic master for lithographic printing characterized by a base, a barrier coat thereon, and a photo-conductive layer. The barrier coat includes a hydrophobic thermoplastic film-forming resin having labile hydrogen-containing functional groups and a conductive agent. The conductive agent is a quaternary ammonium salt. The salts have only a minimal effect on water resistance and result in excellent reduction in the dielectric characteristics of the barrier coat.

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: In an electrically activatable recording element improvements are provided by an electrically conductive interlayer (ECI layer) separating (a) an electrically activatable recording layer from (b) a photoconductive layer or electrical activating means. The ECI layer comprises electrically conductive particles uniformly dispersed in an electrically insulating binder. The interlayer enables imaging with a minimized air gap between (a) and (b). The recording element is room light handleable. The element provides an image by dry development processing or by means of processing solutions.

Abstract: An electrophotographic photosensitive member for forming a potential image utilizing the difference in voltage distribution resulting from the change in resistance of a photoconductive layer. The photosensitive member is featured in forming a high-contrast potential image by the use of amorphous silicon for the photoconductive layer.

Abstract: A process for forming an electrically conductive film by exposing to actinic radiation a coating that contains a nonionic electron donating compound and a halogen-substituted polymer having film-forming properties on a substrate, thereby forming a charge transfer complex in said halogen-substituted polymer in said coating.

Abstract: In an electrically activatable recording element, such as one comprising an electrically conductive support having thereon, in sequence: (a) a polymeric electrically active conductive (EAC) layer, (b) an electrically activatable recording layer comprising (A) a dye-forming coupler, and (B) an oxidation-reduction combination comprising (i) an organic silver salt oxidizing agent consisting essentially of a silver salt of a 1,2,4-mercaptotriazole derivative, with (ii) a reducing agent which, in its oxidized form, forms a dye with the dye-forming coupler, (c) a photoconductive layer separated from (b) by an air gap of up to 20 microns, and (d) an electrically conductive layer; improvements are provided by means of a polymeric EAC layer (a) consisting essentially of a vinyl addition polymer, such as poly(methyl acrylate-co-vinylidene chloride). The recording element is room light handleable and provides a dye image and silver image by dry development processing.

Abstract: Electroductive article comprising a coating composition of copolymers containing from 70 percent to 85 percent by weight diallyldimethylammonium chloride and at least 15 percent but less than 30 percent by weight N-methylolacrylamide and optional comonomers is disclosed. These electroconductive polymers are coated onto a substrate and become water-insensitive thereafter.

Abstract: A coating composition useful in forming conductive layers comprises a latex having water as a continuous phase and, as a dispersed phase, hydrophobic polymer particles having associated therewith a polyaniline salt semiconductor. The coating composition can be coated on a variety of supports to produce conductive elements. The coating compositions are particularly useful in forming antistatic layers for photographic elements or conducting layers for electrophotographic and electrographic elements. Also disclosed is a preferred process for preparing a latex coating composition comprising the steps of loading polymer particles with the polyaniline component of the polyaniline acid addition salt semiconductor and then acidifying the latex to form a polyaniline salt coating composition.

Abstract: A planar array of microcells is formed in a support. An electrostatic charge pattern is established on the support differentiating first and second interlaid sets of microcells. An electrographic imaging composition is introduced into the first set of microcells, and a second, differing imaging composition is introduced into the second set of microcells. Multicolor photographic elements, particularly dye image transfer photographic elements, can be prepared.

Abstract: A magnetic imaging process and imaging member comprising an electrically conductive layer overcoated with an electrically resistive layer wherein a latent magnetic image is formed on the imaging member by heating selected portions thereof. The latent image is then developed by contacting the imaging member with a magnetic toner composition. The developed image is transferred to a permanent substrate and fixed thereto.

Abstract: An improved aqueous process for making a conductive medium for electrostatic printing and the conductive medium therefrom, the process comprising applying to one side of a high density basestock a partially insolubilizable aqueous conductive latex precoat, preferably ranging in coat weight from 0.5 to 1.0 pounds per 3000 ft.sup.2, the insolubilization of the conductive latex resulting from a partial insolubilization of the major conductive component of the latex; applying to the other side of the basestock a first aqueous low-resistance conductive precoat preferably having a coat weight of about 2 pounds per 3000 ft.sup.2 ; partially insolubilizing the conductive latex precoat; applying to the partially insolubilized latex precoat an aqueous dielectric coating preferably ranging in coat weight from 4.5 to 6.5 pounds per 3000 ft.sup.2 ; and applying to the first low-resistance precoat a second aqueous low-resistance conductive coating preferably ranging in coat weight from 0.5 to 1.5 pounds per 3000 ft.sup.2.

Abstract: An improved aqueous process for making a conductive medium for electrostatic printing and the conductive medium therefrom, the process comprising applying to one side of a high density basestock a partially insolubilizable aqueous conductive latex precoat, preferably ranging in coat weight from 0.5 to 1.0 pounds per 3000 ft.sup.2, the insolubiliztion of the conductive latex resulting from a partial insolubilization of the major conductive component of the latex; applying to the other side of the basestock a first aqueous low-resistance conductive precoat preferably having a coat weight of about 2 pounds per 3000 ft.sup.2 ; partially insolubilizing the conductive latex precoat; applying to the partially insolubilized latex precoat an aqueous dielectric coating preferably ranging in coat weight from 4.5 to 6.5 pounds per 3000 ft.sup.2 ; and applying to the first low-resistance precoat a second aqueous low-resistance conductive coating preferably ranging in coat weight from 0.5 to 1.5 pounds per 3000 ft.sup.2.

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 electrophotography photosensitive plate having an interfacelayer between a substrate and a photosensitive layer. Said interfacelayer comprises the mono- or co-polymer of the unit components represented by the general formula: ##STR1## In said formula R is a hydrogen atom or a methyl group; A is ##STR2## wherein R.sub.1, R.sub.2 and R.sub.3 each are lower alkyl, phenyl or benzyl groups, and further R.sub.2 and R.sub.3 may be taken together to form a ring, or ##STR3## wherein B is a nonmetallic atom selected from the group consisting of carbon, nitrogen and sulfur atoms, necessary to form a 5-6 membered heterocycle nucleus with the --N.sup.+ .dbd.C--; X.sup.- is an anion; and Y is a substituted or unsubstituted alkylene group.

Abstract: In an electrostatographic recording member comprising at least:an electrically-insulating substrate;an intermediate layer overlying the substrate, the intermediate layer being electrically conductive;an outer layer overlying the intermediate layer, the outer layer comprising a photoconductive material or a dielectric material of high volume resistivity; andmeans for establishing a ground connection to the electrically-conductive intermediate layer;the improvement comprising said ground connection means comprising at least one hole or aperture disposed through the thickness of the recording member from a surface thereof at least to the depth of the conductive intermediate layer and substantially completely filled with an electrically-conductive composition comprising a plastic adhesive and a sufficient amount of an electrically-conducting pigment to make the composition electrically-conductive.

Abstract: Electroconductive copolymers of diallyldimethylammonium chloride and at least 15 percent by weight acrylamide which exhibit improved solvent holdout.