Abstract: The metal substrate of an electrophotographic member is provided with a selenium-tellurium alloy layer containing 5-30% tellurium, 10-5,000 ppm of a metallic element of the fifth main group, and 10-100 ppm of a halogen. A preferred embodiment contains 15% tellurium, 40 ppm arsenic, and 40 ppm chlorine. The addition of the metallic element of the fifth main group to the selenium-tellurium alloy results in a stabilization of charging potentials in multicycle operation.If the metal substrate is an aluminum drum, the electrophotographic member can be used as a copying drum in high-speed copiers.

Abstract: Electrophotographic light-sensitive elements containing substituted or unsubstituted fluorenone hydrazones as charge generating or charge transport materials are described.

Abstract: Disclosed is a two-component type magnetic developer comprising a magnetic carrier consisting of a non-pulverizing agglomerate of cubic particles of magnetite having a particle size of 1 to 14 microns as measured by an electron microscope and a magnetic toner having a high electric resistance and consisting of particles having a particle size of 3 to 30 microns and comprising a binder resin medium and magnetite having a particle size smaller than 1 micron, which is dispersed in the binder resin medium, the magnetic carrier/magnetic toner mixing weight ratio being in the range of from 5/100 to 40/100.

Abstract: Disclosed is a photosensitive material for electrophotography comprising a conductive substrate and a layer of a composition comprising a dispersion of a photoconductive pigment in a binder resin, which is formed on the conductive substrate, wherein a (dialkypyrophosphato) organic titanate is incorporated into said composition.This photosensitive material is excellent in the ozone resistance and the moisture resistance.

Abstract: Disclosed is a photosensitive composition for electrophotography, which comprises a dispersion of a disazo-type photoconductor in an electrically insulating resin medium, wherein a nitrophthalic anhydride represented by the following formula: ##STR1## wherein n is a number of 1 or 2, is incorporated as a sensitizer.

Abstract: An electrophotographic copying process employs a photosensitive member which includes a conductive layer carrying a sequential lamination of a photoconductive layer which is sensitive to visible light and a function layer different therefrom, forms an electrostatic latent image by trapping charge on opposite sides of either of the photoconductive layer and the function layer in such a condition that a layer which is not retaining the charge is one of photoconductive layers forming the photosensitive member, and repeatedly employs the electrostatic latent image to produce a plurality of copies. During the copying step for producing a plurality of copies, a uniform exposure by light rays which activate the one of photosensitive layers forming the photosensitive member which is not retaining the charge is applied to the photosensitive member.

Abstract: An intermediate transfer body for a transfer type recording apparatus which comprises a substrate consisting of a thermoplastic resin layer and a thermosetting resin layer, wherein said body further comprises an intermediate transfer layer can be added to the intermediate transfer body. The intermediate transfer body consists of an elastic material, such as a fluoro-carbon rubber or a silicone rubber.

Abstract: Radiation is directed toward a support through an ordered array of lateral walls to form interlaid radiation-exposed and shadowed microareas on the support. A first composition is then located on the support in either the shadowed or unshadowed microareas. At least one additional composition is then positioned on the support in laterally displaced microareas forming an interlaid pattern with the first microareas.

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: This invention is generally directed to toner compositions, and developer compositions containing same, the toner compositions being comprised of resin particles, and pigment particles, wherein one of the pigments is comprised of an alkaline earth salt of 4-amino-2-chlorotoluene-5-sulfonic acid coupled to 3-hydroxy-2-naphthalene carboxylic acid of the formula ##STR1## which compositions are useful in electrostatographic color imaging systems. In the above formula, X is the cation calcium, barium or strontium.

Abstract: The electrophotographic photosensitive member has a photoconductive layer containing photoconductive particles each of which has a water insoluble compound of a metal element of Group VIII of the Periodic Table deposited on the surface.

Abstract: Disclosed is a dry developer for an electrostatic image, which comprises molded particles of a dispersion of a binder medium, a wax and a pigment, wherein a combination or partial reaction product of (A) a copolymer of an olefin with a polar group-containing, ethylenically unsaturated monomer and (B) a metal alkoxide of aluminum or titanium is incorporated as a crosslinking agent into said molded particles.In this dry developer, the mutual dispersibility of the respective developer components is highly improved, and the developer particles are uniform and homogeneous in the composition.

Abstract: Disclosed is a dry magnetic developer consisting essentially of a particulate shaped article of a composition comprising a binder resin medium and a powdery magnetic material dispersed in the binder resin medium, wherein said composition comprises as the powdery magnetic material a non-pulverizing agglomerate having a secondary particle size of 1 to 10 microns, which is formed by granulating and sintering fine cubic particles of magnetite or other ferrite having a primary particle size of 0.1 to 1 micron.

Abstract: Disclosed are electrophotographic elements comprising a support having coated thereon a photoconductive composition comprising a photoconductor dispersed in a linear film-forming polyester resin having its terminal hydroxyl and carboxyl groups endblocked with aprotic groups. The aprotic groups reduce hydrogen bonding within the resin matrix, and enhance the flowability of the resin when heated. Electrophotographic elements utilizing polyester resin binders endblocked in accordance with the present invention possess improved fusibility as compared with similar electrophotographic elements containing equivalent but protic endblocked polyester matrices, and as a result can be readily developed by flash fusing. In addition, such electrophotographic elements containing polyester resin binders endblocked in accordance with the instant invention possess improved photographic speed, and often improved dark decay properties, as compared with electrophotographic elements containing protic endblocked polyester matrices.

Abstract: A two-component dry-type composite developer which is a mixture of 100 parts of (A) magnetic toner particles of a binder resin and 40 to 70% by weight of magnetite having a bulk density of at least 0.45 g/ml, a number average maximum size of at least 0.5 .mu.m and a maximum size/minimum size ratio of from 1.0 to 5.5 and 1 to 30 parts of (B) non-magnetic toner particles of binder resin, pigment and negative charge controlling agent. The magnetic toner particles have an electrostatic capacitance of 7 to 8.5 picofarad, a dielectric constant of 3.59 to 4.36, and a volume resistivity of 1.2 to 8.6.times.10.sup.14 .OMEGA.-cm, and the nonmagnetic toner particles have an electrostatic capacitance of 6.0 to 8.0 picofarad and a dielectric constant of 3.08 to 4.10. The toner particles (A) and (B) have friction chargeability characteristics of the same polarity and are consumed at the same rate during development such that the mixing ratio remains constant and the development characteristics are not changed during use.

Abstract: An electrographic development process wherein an electrically charged developer comprising electrically conductive particles with a volume resistivity of 10.sup.9 .OMEGA.cm or less and toner particles with a volume resistivity of 10.sup.12 .OMEGA.cm or more, with the mixing ratio of the respective particles being from 1:99 to 40:60, is brought into contact, or proximity, with a latent electrostatic image with a polarity opposite to that of the electrically charged developer, and the latent electrostatic image is developed to a visible image by the developer, through the steps of supplying the developer to a developer doner member; forming a developer layer thereon with a thickness ranging from 150 .mu.m to 300 .mu.m; subjecting the developer to charge injection to a potential ranging from -150 V to -500 V; and supplying the developer to a latent electrostatic image bearing member for development of the latent electrostatic image thereon.

Abstract: An electrophotographic photosensitive member is characterized by having a photosensitive layer containing at least one disazo pigment represented by the formula ##STR1## wherein Cp represents a coupler residue; B.sub.1, B.sub.2, B.sub.1 ', and B.sub.2 ' independently of one another represent atoms or groups selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl; and A represents ##STR2## (D.sub.1 and D.sub.

Abstract: An electrophotographic photosensitive member having a layer containing at least one compound represented by the formula ##STR1## wherein X.sub.1 represents a residue necessary for completing a substituted or unsubstituted aromatic hydrocarbon ring; X.sub.2 represents a residue necessary for completing a substituted or unsubstituted heterocyclic ring; R.sub.1, R.sub.2, R.sub.3, and A each represent hydrogen, alkyl, aralkyl, or aryl, substituted or unsubstituted; and m is 0 or 1.

Abstract: This invention is generally directed to an organic layered photoresponsive device containing a charge transport layer comprised of a composition of the following: ##STR1## dispersed in a highly insulating and transparent organic resinous material, wherein x is selected from the group consisting of ortho (CH.sub.3), meta (CH.sub.3), para (CH.sub.3), ortho (Cl), meta (Cl), and para (Cl), and dispersed in said transport layer from about 0.1 weight percent to about 10 weight percent of an additive composition selected from the group consisting of ##STR2## wherein R and R.sub.1 are independently selected from the group consisting of ethylene groups containing from about 1 to about 6 carbon atoms such as methylene, ethylene, propylene, butylene and the like, and n is 0 or 1; ##STR3## wherein R.sub.2 and R.sub.3 are independently selected from alkyl groups containing from about 1 to about 6 carbon atoms, and R.sub.

Abstract: In forming a latent magnetic image by imagewise demagnetization of a magnetized layer, less than the entire thickness of the exposed area is demagnetized so as to induce a magnetization of opposite polarity in the demagnetized area, thus reducing the net strength of the residual and induced magnetic fields within the exposed areas.