Abstract: A method of real-time color masking is disclosed wherein pairs of color filters are inserted at specific locations in the optical paths of an electro-optical image multiplication system to thereby produce a modulated radiation pattern representative of the product of the reflectance of the positive of one color component and the negative of other color components of the original.

Abstract: Process for preparation of block copolymers having photoconductive segments derived from a vinyl monomer and segments derived from a second addition monomer; said addition polymer segment also possibly being photoconductive. A polymer is initially prepared from one of the above monomers whereby the terminal groups of the resultant polymer are capable of generation of free radicals. By the appropriate selection of reaction medium it is possible to use the above free radical generating polymer to initiate polymerization of the second monomer, the polymer of which thereafter precipitates. This polymerization continues in the solid phase thereby preventing free radical decay even after depletion of the second monomer. The free radicals of these "living" polymers are quenched by the addition to the reaction medium of a monomer preferably corresponding to the structural units of the free radical generating polymer.

Abstract: Process for preparation of a solid phase dispersion of photoconductive materials in an insulating binder matrix from a film forming insulating polymeric resin and an organo-selenium compound capable of undergoing selective decomposition in response to an appropriate stimulus; whereby, elemental selenium is extruded from said organo-selenium compound and deposited in the binder matrix. Because this extrusion/deposition of elemental selenium can be performed selectively, it is possible to prepare binder films having photoconductive image patterns which are suitable for use in range extended and conventional xerography.

Abstract: Photoconductive composition comprising a carbazole functional polymer wherein at least 0.1 percent of said carbazole function groups have the following structural formula ##SPC1##Wherein X is a structural unit of said polymer.Materials of the above structural formula can be readily polymerized or copolymerized with other addition polymers. These polymer compositions are useful in preparation of photoconductive insulating layers for electrophotography.

Abstract: Photoconductive composition comprising a carbazole functional polymer wherein at least 0.1 percent of said carbazole function groups have the following structural formula ##SPC1##wherein X is a structural unit of said polymer; R is hydrogen; an aliphatic hydrocarbon radical having from 1 - 10 carbon atoms; phenyl; or substituted phenyl, said phenyl substituents being capable of contribution of electrons to relatively electron deficient centers with the structural unit.Materials of the above structural formula can be readily polymerized or copolymerized with other addition polymers. These polymer compositions are useful in preparation of photoconductive insulating layers for electrophotography.

Abstract: An improved electrostatographic process wherein the imaging surface of the imaging member is treated with a lubricating effective amount of a compound selected from the group consisting of ortho-, meta-, para-phthalic acid, their corresponding metal or ammonium salts, and mixtures thereof. Controlled treatment of the imaging surfaces of the imaging member with the above compound(s) facilitates transfer of the developed image from the imaging member to a receiving sheet and removal of toner residues from the imaging surface upon cleaning. The imaging member element of the apparatus used in carrying out this process is covered with a thin film of lubricant over substantially all of its imaging surface thereby greatly improving toner transfer and removal.

Abstract: An imaging system wherein an imaging member comprising a layer of softenable substantially electrically insulating material containing a dispersion of randomly oriented electrically photosensitive orientation particles is imaged by: (A) applying a uniform electric field across said member, (B) imagewise exposing said member to activating electromagnetic radiation, and (C) developing said member by decreasing the resistance of said softenable layer to reorientation of said orientation particles sufficiently to allow imagewise reorientation of said orientation particles.

Abstract: Photoconductive composition comprising an organo-chalcogen polymer of the formula:--Se -- A -- Se -- Te.sub.m --.sub.nwhereinA is a member selected from the group consisting of an alkylene radical having from about 9 to about 20 carbon atoms, a divalent aromatic radical having from about 6 to about 50 carbon atoms and a divalent heterocyclic radical;m is at least 1; andn is at least 2Or--B -- Se.sub.a.sub.-x -- Te.sub.m -- Se.sub.x --.sub.bwhereinB is a member selected from the group consisting of divalent hydrocarbylene radicals and divalent heterocyclic radicals;a is a positive integer of at least 2;x is a positive integer of at least 1 but less than a;m is a positive integer in excess of 1; andb is a positive integer in excess of 1.This composition possesses enhanced spectral response and electrophotographic speed over compositions containing selenium alone.

Abstract: Polymeric compositions comprising the product of the addition polymerization of N-vinylcarbazole and at least one member selected from the group consisting of N-vinylphthalimide and the isostructural modifications thereof. Many of the above polymeric products are photoconductive and, thus, are suitable for use in electrophotography.

Abstract: Electrostatographic imaging method employing an imaging member provided with a photoconductive imaging layer containing an organic photoconductive material, an activator capable of forming a charge transfer complex with said material and a protonic acid sensitizer. The acid sensitization of the charge transfer complex in this imaging layer dramatically enhances the photosensitivity of this photoconductive composition and yet avoids the undesirable memory effects generally experienced in such materials when a photoconductive layer of these materials is imaged in accord with the method of this invention.

Abstract: An imaging method based upon visible light induced changes in a photochromic imaging layer containing a dispersion of at least one of the following compounds: ##SPC1##Where a, b, c and d are independently selected from the group consisting of hydrogen, halogen, NO.sub.2, NH.sub.2, lower alkyl, phenyl, phenoxy, lower alkoxy, carboxy, hydroxyl, lower alkyl esters and aryl esters,In an organic film forming binder.

Abstract: Ambipolar photoconductive composition comprising the product of the in situ polymerization of at least one cyclic compound of the formula: ##EQU1## wherein Ar is a polyaromatic nucleus selected from the group consisting of diradicals of naphthalene, anthracene, pyrene and carbazole;X and Y are independently selected from the group consisting of halogen, NO.sub.2, NH.sub.2 ; lower alkyl, phenyl, phenoxy, lower alkoxy, carboxy, hydroxyl, lower alkyl esters and aryl esters;m and n can range from 0 to the total number of replaceable hydrogens on the polyaromatic nucleus;In a polymeric host resin.By the appropriate in situ polymerization of the above compound in the host polymer, it is possible to produce an interpretating photoconductive netword throughout the host polymer. The resulting photoconductive materials can be incorporated into an imaging member in an electrostatographic imaging system and function in either a positive or negative charging mode.

Abstract: An induction imaging process wherein the electrophotographic imaging member comprises at least three separate and distinct layers; namely, a conductive substrate, a photoconductive insulating layer and an insulating film overcoating the free surface of the photoconductive insulating layer. This process provides an efficient route for latent image formation, development and erasure of charge carriers trapped at the interface of the insulating overcoating and the layer contiguous with said coating. This process is especially suitable for use in combination with polar liquid development.

Abstract: Method for enhancing both the rate and completeness of discharge of a photoconductive insulating layer comprising phthalocyanine pigments. Such enhancement is achieved by incorporation within such layer of from about 0.1 to about 10 weight percent, based upon phthalocyanine content, of at least one charge transport sensitizer compound of the formula ##SPC1##Wherein R.sub.1 is alkyl of 1-6 carbon atoms;R.sub.2 is aryl, aralkyl, p-alkylaminophenyl, or substituted p-dialkylaminophenyl;R.sub.4 represents a hydrocarbon diradical making up the balance of an aromatic ring system;R.sub.3 is alkyl, aryl, alkaryl, heterocyclo, amino, alkyl substituted amino, nitro, alkoxy or halogen;X is sulfur, oxygen or selenium; andA is a monovalent or divalent anion.

Abstract: A reprographic imaging method based upon a color modifying reaction. In one embodiment of this method a leuco (colorless or weakly colored) form of a material is allowed to selectively react with an appropriate reagent across a divider in response to selective photochemical modification of said divider whereby the leuco form of this material is converted to a highly colored derivative. In a second embodiment of this invention, the reverse occurs; namely a highly colored material is converted to a colorless or weakly colored derivative. A third contemplated embodiment of this invention involves the conversion of a one colored material to another accompanied by a substituted shift in its absorption spectrum. Each of these systems are highly suitable in preparation of transparencies such as microfilm recordings.

Abstract: An improved electrophoretic development method comprising providing a liquid developer system having a backing electrode and a developer electrode, wherein the development electrode comprises a plurality of individually biased electrodes. According to this improved method, as an electrostatically imaged insulating member is contacted with the liquid developer and directed through a development zone defined by said electrodes, the leading edge of said insulating member selectively activates the individually biased development electrodes in synchronization with the travel of the insulating member through said zone, and the trailing edge of said insulating member selectively inactivates the individually biased development electrodes upon the withdrawal of the insulating member from said zone. This method is especially suitable for preparation of reversal images by electrophoretic development.

Abstract: Polymeric photoconductive composition having recurring structural units of the formula: ##EQU1## WHEREIN R is hydrogen or alkyl of 1-4 carbon atoms;R' is alkyl of 1-4 carbon atoms, cycloalkyl, phenyl, or alkyl substituted phenyl;B is phenylene or a diradical of a fused aromatic nucleus having up to four benzene rings;A.sub.r is selected from the group consisting of naphthalene, anthracene, pyrene, perylene, julolidine, carbazole, their respective homologues and analogues;x is 0 or 1;y is 0 or 1; andn is at least 2.The above polymeric compositions are suitable for use as charge transport matrices for photogenerator materials or can themselves be complexed with an appropriate activator and thus, form a charge transfer complex which is itself capable of photoresponse within the visible region of the electromagnetic spectrum.

Abstract: Process for direct alpha to X phase conversion of metal-free phthalocyanine. In this process, the alpha polymorph of a metal-free phthalocyanine pigment can be directly converted to the X form by depositing the alpha form of the pigment on a suitable substrate followed by in situ conversion of this deposit by controlled heating. The X form of metal-free phthalocyanine is known to possess good electrophotographic speed, and, thus, can be used either alone or in combination with other photoconductive materials in electrophotography.