Abstract: An apparatus for creating multiple color images is disclosed. The apparatus includes a charge retentive surface having a voltage saturation level, a plurality of imaging devices, and a plurality of developing devices. A first imaging device records a latent image on the charge retentive surface at a first exposure level. The latent image is then developed with a layer of toner particles by a first developing device. A second imaging device records a second latent image at a second exposure level. The second exposure level is a function of the voltage saturation level for the charge retentive surface and the maximum mass of the first layer of toner particles. A second developing device develops the second latent image with a second layer of toner particles and a third imaging device records a third latent image at a third exposure level.

Abstract: An apparatus in which an altered copy of an original document is produced. An editing device associated with an electrophotographic printing machine changes the information in the original document and generates a signal indicative of the changes therein. The information is stored in an erasable read-only memory. The erasable read-only memory is inserted into the copying machine to conrol the formation of the copies so as to correspond to the edited original document.

Abstract: An apparatus in which a sheet is advanced into registration with information developed on a moving member. Spaced belts having a sheet gripper secured thereto move the sheet in a recirculating path of movement. The belts move at a first velocity during registration of the sheet with the information on the moving member and at a second velocity during non-registration of the sheet with the information on the moving member.

Abstract: A single component toner composition comprised of crosslinked resin particles, a low molecular weight wax component, magnetite, and external additive particles selected from the group consisting of first flow aid additive particles, and second metal oxide additive particles.

Abstract: An apparatus which develops a latent image with marking particles transported from a storage supply into contact therewith. As the marking particles are moved into contact with the latent image, extraneous marking particles are confined and guided gently back to the storage supply thereof. In this way, any clouds of particles formed cannot escape from the development apparatus.

Abstract: A process for the preparation of an electrostatographic photosensitive device comprising combining a sodium additive comprising sodium carbonate, sodium bicarbonate, sodium selenite, sodium hydroxide or mixtures thereof with trigonal selenium particles, an organic resin binder and a solvent for the binder to form a milling mixture, milling the milling mixture to form a uniform dispersion, applying the dispersion to a substrate in an even layer and drying the layer.

Abstract: A welded web comprising a first edge of a web having at least one aperture overlapping a second edge of a web comprising thermoplastic material on an exposed surface along the second edge to form a region of contiguous contact between the first edge and the second edge, at least a portion of the thermoplastic material at least partially filling the aperture thereby bonding the first edge to the second edge.

Abstract: A process for synthesizing a squariane composition comprising forming a mixture comprising squaric acid, a long chain primary alcohol and a tertiary amine and heating the mixture in vacuo below the boiling points of the primary alcohol and the tertiary amine to form the squariane composition.

Abstract: At least one ribbon-like stream of a first coating composition adjacent to and in edge contact with at least one second ribbon-like stream of a second coating composition are deposited on the surface of a support member by establishing relative motion between the surface of the support member and the ribbon-like streams, simultaneously constraining and forming the ribbon-like streams parallel to and closely spaced from each other, contacting adjacent edges of the ribbon-like streams prior to applying the ribbon-like streams to the surface of the support member and thereafter applying the ribbon-like streams to the surface of the support member.

Abstract: An electrophotographic imaging system utilizing a member comprising at least one photoconductive layer and an overcoating layer comprising a film forming continuous phase comprising charge transport molecules and finely divided charge injection enabling particles dispersed in the continuous phase, the insulating overcoating layer being substantially transparent to activating radiation to which the photoconductive layer is sensitive and substantially electrically insulating at low electrical fields.

Abstract: A method of forming an alloy layer on the surface of a substrate comprising forming in a vessel a molten bath comprising at least one vaporizable alloying component having a higher vapor pressure than at least one other vaporizable alloying component in said bath, forming a thin, substantially inert, liquid layer of an evaporation retarding film on the upper surface of said molten bath, said liquid layer of an evaporation retarding film having a lower or comparable vapor pressure than both said vaporizable alloying component having a higher vapor pressure and said other vaporizable alloying component on said substrate, co-vaporizing at least a portion of both said vaporizable alloying component having a higher vapor pressure and said other vaporizable alloying component whereby said evaporation retarding film retards the initial evaporation of said vaporizable alloying component having a higher vapor pressure, and forming an alloy layer comprising both said vaporizable alloying component having a higher vapor

Abstract: An electroforming process comprising providing a core mandrel having an electrically conductive, adhesive outer surface, a coefficient of expansion of at least about 8.times.10.sup.-5 in./in./.degree.F., a segmental cross-sectional area of less than about 1.8 square inches and an overall length to segmental cross-sectional area ratio greater than about 0.6, establishing an electroforming zone between an anode selected from a metal and alloys thereof having a coefficient of expansion of between about 6.times.10.sup.-6 in./in./.degree.F. and about 10.times.10.sup.-6 in./in./.degree.F.

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: 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: There is disclosed a process for the production of unsymmetrical, substituted diarylamines by the reaction of a primary aromatic amine and a substituted phenol wherein the phenol is held in excess of the primary aromatic amine thereby minimizing by-product formation as a result of self-condensation of the primary arylamine. The desired secondary amine is produced in high yield and purity by recycling the unreacted phenol.

Abstract: A process for depositing particles within a softenable layer to form a migration imaging member wherein the layer is softened by heating, exposed in a first deposition zone to a high impingement rate of vapors of selenium or selenium alloy moving along in a line of sight path from a selenium or selenium alloy source to form a sub-surface monolayer of spherical particles comprising the selenium or selenium alloy, removed from the first deposition zone prior to a substantial dropoff in transmission optical density, exposed to a lower impingement rate of vapors of selenium or selenium alloy in a second deposition zone to increase the size of the spherical particles while maintaining a narrow particle size distribution and achieving a high surface packing density thereby increasing the transmission optical density of the imaging member, and thereafter removed from the second deposition zone prior to a substantial dropoff in transmission optical density.

Abstract: A toner and development process involving electrostatic development without carrier is disclosed. The toner of the invention is effectively transferred from photoreceptors to plain paper after development. The toner is formed of a combination of an insulating toner and a conductive toner that are triboelectrically active with respect to each other.

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: A process for preparing a selenium alloy highly resistant to the development of persistant bulk space charge during prolonged, electrophotographic cycling comprising heating a mixture comprising selenium, arsenic and chlorine to a temperature between about 290.degree. C. and about 330.degree. C. to form a molten mixture, agitating the molten mixture to blend the components therein, discontinuing or substantially discontinuing all agitation of the mixture to achieve a quiescent state for the mixture, raising the temperature of the mixture to at least about 420.degree. C. for at least about 30 minutes and cooling the mixture until it becomes a solid.

Abstract: A composite quasi-crystalline material made of a polymeric support matrix having disposed therein polar quasi-crystals of photochromic spiropyran complexes, believed to be of the formula A.sub.n B, in which A represents the "colorless" photochromic spiropyran molecule and B represents the colored merocyanine form which is the photolysis product of A, and n is 2 or 3. The polar quasi-crystals are present in the composite material in a substantially polar aligned form. Methods for making the composite material are also disclosed.