Abstract: An apparatus in which particles are removed from a surface and collected. The particles are dislodged from the surface and move through a conduit to a storage housing. As the particles pass through the conduit, the particles are maintained spaced from the interior surface of the walls thereof.

Abstract: A color process in which color copies of an original document containing color information are reproduced. Successive single color electrostatic latent images are developed with particles having a predetermined triboelectric charge thereon. These particles are transferred from the single color electrostatic latent images to a sheet of support material in a prescribed sequence. The sequence of transfer is such that each successive layer of toner particles transferred to the sheet of support material has a lesser triboelectric charge thereon than the preceeding layer transferred thereto. In this manner, back transfer from the sheet of support material to the electrostatic latent image is minimized.

Abstract: A composing machine in which successive original documents have selected portions thereof masked. The unmasked portions of each original document are displayed and reproduced, in registration with one another, forming a composite copy from the unmasked portions of each original document.The foregoing abstract is neither intended to define the invention disclosed in the specification, nor is it intended to be limiting as to the scope of the invention in any way.

Abstract: An electrophotographic printing machine in which a screen interposed in the path of the light image modulates the light image irradiating the charged portion of a photoconductive member. The screen comprises a plurality of sets of light filtering regions. Each set of light filtering regions is substantially complementary in color to the color of the filtered light image, and rotated through a pre-selected angle relative to the next adjacent set of light filtering regions.

Abstract: A reproducing machine in which successive photosensitive members are advanced from storage to the operative location therein. Each photosensitive member is used in the reproducing machine a predetermined interval and then automatically removed therefrom with the next successive photosensitive member being advanced thereto.

Abstract: An electrophotographic printing machine and method of use therefor in which a first image having a density less than that of the original document being reproduced is formed on a sheet of support material. A half-tone image having substantially the density of the original document is reproduced, in superimposed registration with the first image, on the sheet of support material. This produces a high quality copy having substantially the density of the original document.

Abstract: A novel method for preparing a stencil master, a novel stencil and a method for printing therefrom are provided. The method for preparing the stencil comprises coating a suitable screen with a curable silicone containing a curing catalyst, depositing a particulate image pattern on said coated screen with a material which selectively inactivates said curing catalyst below said image pattern, curing the resultant nonimaged silicone to an elastomeric ink releasable condition and removing the particles from said particulate image pattern and the uncured silicone below said pattern to provide perforations in imagewise configuration. The method for printing comprises the additional steps of contacting the resultant screen with an image receiving member and passing ink through said perforations to thereby form an inked image on said receiving member.

Abstract: A xerographic plate and photoreceptor having improved speed and image resolution capability comprising a charge generating photoconductor layer, a trapping layer and a profile layer interposed between the trapping and charge generating layers; a suitable profile layer being obtained for xerographic purposes by utilizing materials from the charge generating and trapping layers having different band gaps but applied so as to obtain a gradation or gradient rather than a sharp interface.

Abstract: A sheet feeding apparatus in which successive sheets are separated and advanced from a stack thereof. As the sheet advances from the stack, it is aligned. After alignment, a conveyor moves the sheet to a delivery station. The aligning mechanism moves into the sheet path in response to the conveyor reaching a first predetermined position. When the conveyor moves to a second predetermined position, the aligning mechanism is spaced from the sheet path.

Abstract: An apparatus in which a latent image recorded on a member is developed with particles. The apparatus includes a housing having a chamber for storing a supply of particles therein. During the development process, particles are deposited on the latent image recorded on the member. These particles are purged from the chamber of the housing to permit particles of a different color to be disposed therein.

Abstract: Disclosed is a transparency for use in electrostatographic reproduction, particularly in the multi-color mode of such reproduction. The transparency comprises:A) a base of transparent polyester sheet;B) a second layer adherent to the surface of said polyester sheet of a mixture of an acrylic polymer and a copolymer of vinyl acetate and vinyl chloride said second layer having uniformly dispersed therein:I. particulate silica having a particle size range of from about 2 to 70 millimicrons in its longest dimension and being present in an amount of from about 0.25 to 1.5 weight percent of said second layer, andIi. a salt formed from an anion of a carboxylic acid having 1 to 37 carbon atoms or a dimeric fatty acid having 12 to 36 carbon atoms and a cation characterized by the formula: ##STR1## wherein R.sub.

Abstract: A half-tone screen in which a substantially transparent substrate has a plurality of opaque regions disposed thereon. The opaque regions are arranged in at least a high frequency repetitive pattern and a low frequency repetitive pattern. This type of screen may be employed to modulate the light image of a color transparency being reproduced by an electrophotographic printing machine.

Abstract: An apparatus arranged to develop a latent image recorded on a member with particles stored in the chamber of the housing. A plurality of differently colored particles are housed remotely from the chamber. Particles of a selected color are advanced to the chamber so as to be deposited on the latent image.The foregoing abstract is neither intended to define the invention disclosed in the specification, nor is it intended to be limiting as to the scope of the invention in any way.

Abstract: An apparatus in which an article is illuminated by a light source moving thereacross. Vibration of the light source is minimized during the movement thereof.

Abstract: Hydrophilic printing masters are provided comprising coating a self-supporting master substrate with a hydrophilic polymer containing carboxylic acid functionality and selectively converting this polymer in image configuration to a hydrophobic condition by heat.

Abstract: An imaging member comprising a first layer of electrically active charge transport material contained on a supporting substrate, a photoconductive layer overlying said active layer, and a second layer of electrically active charge transport material overlying said photoconductive layer, said photoconductive layer exhibiting the capability of photogeneration of charge carriers and injection of said charge carriers, one of said electrically active layers which comprises an electrically inactive resinous material made electrically active by the addition of certain activating compounds thereto exhibits the capability of facile hole injection and transport and the other electrically active layer exhibits the capability of facile electron injection and transport.

Abstract: A fusing apparatus in which particles are substantially permanently affixed to a sheet. The fusing apparatus includes a fusing member operatively associated with a back-up member to define a nip through which a sheet passes. In the operating mode, the fuser member is heated to the operating temperature with liquid release material being applied thereto. The fuser member is heated to a temperature lower than the operating temperature in the standby mode. To prevent the formation of a bead release material on the fuser member in the standby mode of operation, relative movement is generated between the fuser member and backup member.

Abstract: A memory control processor adapted to expand a random access or accelerator memory by logical overlays which performs these overlays into memory fields (pages) on the basis of page usage history. To provide a quick reference to page use a chronological sequence is established by links rather than by reordering a stack. This link sequence is tied by very limited leads to the rest of the memory control processor and can therefore be updated during each memory access. In addition the memory control processor includes a task priority logic integrating various competing memory access requests with the overlay operations. To achieve the various transfer modes in the quickest time the memory control processor is organized around a wide control memory storing the task servicing sequences. The width of the control memory and the associated task logic allow general purpose microprogrammable direct memory access which may further be utilized in multiplexed fashion to accommodate various concurrent tasks.

Abstract: A memory control processor adapted to expand a random access or accelerator memory by logical overlays which performs these overlays into memory fields (pages) on the basis of page usage history. To provide a quick reference to page use a chronological sequence is established by links rather than by reordering a stack. This link sequence is tied by very limited leads to the rest of the memory control processor and can therefore be updated during each memory access. In addition the memory control processor includes a task priority logic integrating various competing memory access requests with the overlay operations. To achieve the various transfer modes in the quickest time the memory control processor is organized around a wide control memory storing the tank servicing sequences. The width of the control memory and the associated task logic allow general purpose microprogrammable direct memory access which may further be utilized in multiplexed fashion to accommodate various concurrent tasks.

Abstract: An apparatus in which a developer mix of magnetic carrier granules having toner particles adhering triboelectrically thereto is brought into contact with an electrostatic latent image. The latent image attracts at least a portion of the toner particles thereto. A magnetic belt receives the denuded carrier granules and moves them into position to attract toner particles thereto from the chamber of a storage housing.