Abstract: An electrostatographic developer mixture comprising finely divided toner particles, and steel bead carriers whose surfaces are carburized, or nitrided or carburized-nitrided.

Abstract: An imaging member comprising a layer of particulate photoconductive material dispersed in an organic resinous binder, said photoconductive material comprising trigonal selenium containing a mixture of an alkaline earth metal selenite and an alkaline earth metal carbonate. This layer can be the charge generation layer of an imaging member also having a charge transport layer in contact therewith.

Abstract: An imaging member comprising a layer of particulate photoconductive material dispersed in an organic resinous binder, said photoconductive material comprising trigonal selenium containing a mixture of an alkali metal selenite and an alkali metal carbonate. This layer can be the charge generation layer of an imaging member also having a charge transport layer in contact therewith.

Abstract: An imaging member comprising a hole generation layer and a contiguous hole transport layer, said generation layer comprising a photoconductive material exhibiting the capability of photogeneration of holes and injection of said holes, said hole transport layer comprising a transparent electrically inactive polycarbonate resinous material having dispersed therein from about 25 to about 75% by weight of the composition of one or more of the following diamines: ##STR1## and wherein X is independently selected from the group consisting of an alkyl group having from 1 to about 4 carbon atoms and chlorine in the ortho, meta or para position, said transport layer also containing a chlorine-containing organic solvent, and a stabilizing proportion of a substituted or unsubstituted 2-(2'-hydroxyphenyl)-benzotriazole.

Abstract: Disclosed are electron acceptor monomers of the formula: ##STR1## wherein R is ##STR2## R' is hydrogen or methyl; X and Y are independently selected from the group consisting of --NO.sub.2, halogen, cyano and --CF.sub.3 ;Z is oxygen or dicyanomethylene; anda and b can range from 0 to 3; with the proviso that at least one of R is ##STR3## and polymers prepared therefrom. These monomers and polymers are suitable for use in electrophotographic devices and methods.

Abstract: There is described an electrophotographic photoreceptor comprising a conductive metallic substrate, a composite interfacial structure made up of a layer comprising organic thermoplastic polymeric adhesive material and a thin layer of arsenic triselenide, and a photoconductive insulating layer comprising selenium or its alloys. The photoreceptor is formed by a method which includes depositing the arsenic triselenide layer while the substrate temperature is held at or above the softening point of the thermoplastic polymeric adhesive material but below the crystallization temperature of the arsenic triselenide and then depositing a layer of selenium or selenium alloy while the substrate temperature is held below the softening point of adhesive material and below the crystallization temperature of the selenium or selenium alloy.

Abstract: There is disclosed a method for improving and controlling the charge retention of plastic materials. Various such materials and their applications are also disclosed.