Abstract: A device for depositing charge on a charge retentive surface including an insulative support substrate coated with a layer of highly resistive material and a high voltage bus coupled thereto for providing a high voltage potential across the resistive material layer. The resistive charging device is positioned in contact with or in close proximity to a charge retentive surface to provide a uniform charging potential for depositing ions onto the charge retentive surface.

Abstract: A reprographic method for making a output document having a desired image from an input document having an input image includes scanning an instruction page containing an image processing command. The image processing command contained on the instruction page is decoded, and subsequently at least a portion of the input image is scanned. The output document is then produced from the scanned at least a portion of the input image in accordance with the decoded image processing command. The image processing commands can be such as cut, paste, mask, crop, enlarge, reduce, reorient, lighten, darken or the like that change the form or appearance of the actual image. In addition, the image manipulation commands can be such as commands to control special operational modes for differing input image types, such as, for example, photographs or half-tone images, the number of output document copies to be produced, the output type, color, stock, or other command that controls the output form of the image.

Abstract: A magnetic particle brush developing carrier used for electrostatic latent image developing is disclosed, comprising a magnetic particle having a surface coating comprising two kinds of fluoro-type resins, with one of the resins having a higher critical surface tension than the other. The carrier maintains its triboelectric properties even after extended use, it reaches charge saturation after a short period of triboelectrification, and it has excellent charge stability against environmental change.

Abstract: Disclosed is an ink jet printing process which comprises (1) incorporating into an ink jet printer an aqueous ink composition which comprises water, a humectant, and a colorant of the formula ##STR1## wherein X and X' each, independently of one another, are hydrogen, alkyl, halogen, ester, or amide, wherein Z and Z' each, independently of one another, are either (A): ##STR2## wherein R is hydrogen, hydroxy, alkoxy, aryloxy, ester, amine, amide, ether, thioether, or --(O(CH.sub.2).sub.y).sub.z OH wherein y is an integer of from 1 to 3 and z is an integer of from 1 to about 50, wherein A, B, C, D, E, and F each, independently of one another, are hydrogen, --COOH, --SO.sub.3 M, wherein M is a cation, or --NR"R"', wherein R" and R"' each, independently of one another, are hydrogen, alkyl, or aryl, wherein at least one of A, A', B, and B' is not hydrogen, or (B): ##STR3## wherein S is hydrogen or --(O(CH.sub.2).sub.y).sub.

Abstract: A method of registering images on a user interface with a screen display in which separate electronic pages corresponding respectively with the first and second sides of an electronic duplex page are displayed on the user interface screen display simultaneously with a first image on the first side being disposed in a first position and a second image on the second side being disposed in a second position. The second image is moved on the screen display, relative to the first image so that the second image is disposed in the first position and is aligned with respect to the first image in a selected aligned relationship. Each of the separate electronic pages has a transparent background so that substantial portions of the second image are visible on the screen display even when the first image is superposed with respect to the second image.

Abstract: An improved microelectromechanical device, such as a thermal ink jet die or printhead, is formed by the alignment of two planar substrates bonded together by an intermediate thick film layer of patterned polymeric material, such as polyimide. The improved device has a fully cured, patterned thick film layer which is planarized by chemical-mechanical polishing-to improve the bonding strength between the substrates. The planarization removes topographical formations generated during the deposition of the thick film layer and/or during the patterning of the recesses therein.

Abstract: A photoreceptor apparatus constructed of a photoreceptor belt releasably attached to the surface of a cylindrical mandrel. The photoreceptor belt is preferably attached to the mandrel by means of a movable segment of the mandrel that is retracted into the mandrel to allow installation of the belt by reducing the effective circumference of the mandrel.

Abstract: A high differential air pressure assisted blotting device for conditioning, on an image bearing member, liquid developer images consisting of charged toner particles and carrier liquid. The high differential air pressure blotting device includes a movable porous blotter belt forming an endless loop and having an outer surface for contacting and blotting carrier liquid from an image being conditioned, and a backup roller positioned at a first location within the endless loop for contacting a first portion of the blotter belt to gently urge the blotter belt into blotting-contact with the image being conditioned.

Abstract: Simulated photographic-quality prints are created using nonphotographic imaging such as xerography and ink jet. Reverse or wrong reading toner images are formed on a transparent subs,trate which is adhered to a coated backing sheet. The backing sheet is coated with a polymer material which serves as an adhesive and has a glass transition temperature less than 55.degree. C. A hydrophilic polymer coating having a melting point greater than 50.degree. C and a toner plasticizer having a melting point less than 75.degree. C contacting the adhesive polymer serves as a wetting agent for providing an enhanced optical interface as well as protection for the adhesive polymer which has a lower melting point than the adhesive polymer.

Abstract: An editing process and device for modifying images in the structured image (SI) format. The image editor can perform image processing operations, transparency and geometric transform to objects. The underlying SI format allows the image editor to be memory efficient with unlimited undo capability.

Abstract: A multi-color imaging apparatus utilizing recharging between two image creation steps for recharging a charge retentive surface to a predetermined potential prior to forming a second of the two images. The two images are formed using toner particles which are subject to under color splatter (UCS). The UCS phenomena occurs when a developed image passes through a toner cloud created by a certain type of scavengeless development system. The forgoing problem is obviated by applying pressure to toner images in combination with recharging thereof prior to their passage through a developer housing.

Abstract: A novel wire module support structure for controlling the spacing and edge wire angle of an electrode wire relative to a donor roll in a scavengeless development process is disclosed. A stationary wire support is arc shaped with a rounded edge and is located in close proximity to the donor roll end. This spatial relationship between the donor roll end and the wire support surface optimizes the donor roll surface to wire relationship. The wire support surface may be at a greater or lesser radius than the the donor roll surface. When the wire support surface is located at a larger radius than the donor roll surface, a clamp assembly is used to control the height of the wires with respect to the donor roll surface.

Abstract: A device that allows an operator to unload copy sheets from an output tray of a machine, keep the machine running, and maintain integrity of the copy sheet stack. The output tray is slid to the right with respect to the front of the machine to allow the operator to unload the copy sheet stack. When slid to the right, an `X-shelf` is unfolded to hold the stack of continual copy sheet output. After the tray is emptied, it is slid to the left and back into the original position. The sheets on the `X-shelf` fall into the output tray and the job continues uninterrupted.

Abstract: An apparatus which detects a mass of marking material developed on a test patch recorded on a photoconductive surface. The apparatus includes a densitometer, a capacitor sensor and a controller. The densitometer is spaced from and adjacent to the photoconductive surface. The capacitor sensor is also positioned adjacent to the photoconductive surface and spaced therefrom. In operation, the densitometer generates a first signal proportional to the specular component of the total reflectivity of the material deposited on the test patch developed on the photoconductive surface. The capacitor sensor generates a second signal proportional to the mass of material developed on the test patch recorded on the surface. In response to these signals, the controller generates a first control signal as a function of the first signal received from the densitometer in response to the mass of material deposited on the test patch being less than a preselected mass.

Abstract: A temperature sensor for use in connection with a heat and pressure roll fuser which minimizes the problem of gloss variation due to fuser roll wear caused by sensor contact with the fuser roll surface. To this end, one or more Resistance Temperature Detector (RTD) sensors are used. Each sensor is encapsulated or embedded in a polyimide material in any desired form such as a tape. The polyimide tape including the RTD is supported in contact with the surface of the heated fuser roll. The load required for this operation is substantially less than that for a bead thermistor and the area of the sensor structure is relatively large for distributing the load over a larger surface area of the roll contacted as compared to the area of contact of a bead thermistor.

Abstract: A surface-treated inorganic fine particle includes an inorganic fine particle, a hydrophobizing agent deposited on the surface of the inorganic fine particle and an amino group-containing coupling agent deposited on the surface of the inorganic fine particle, wherein the hydrophobizing agent and the amino group-containing coupling agent in a ratio of 1/(0.01 to 0.1) by weight are deposited on the surface of the inorganic fine particle by treating the surface of the inorganic fine particle with the hydrophobizing agent and the amino group-containing coupling agent. An electrophotographic developer contains toner particles and the surface-treated inorganic fine particles.

Abstract: Methods of and apparatus for compensating electrostatic printing process stations for residual toner voltage. A toner patch is produced on a photoreceptor. That toner patch and a section of the untoned photoreceptor are then charged and exposed so as to produce a first latent image. The residual voltage between the exposed toner patch and the exposed section of the untoned photoreceptor is then determined. At least one processing station is then adjusted to compensate for the determined residual toner voltage. Process stations which can be adjusted include development stations, exposure stations and charging stations.

Abstract: The present invention is a method and apparatus for tuning the appearance of bitmap images rendered on a printing system.

Abstract: An image fixing device for heating and applying pressure to a toner image on a recording medium to melt and press the toner image on the recording medium, having: a heating and fixing roll for heating the recording medium; a device for rotating and driving the heating and fixing roll; an endless belt arranged with respect to the recording medium on the side opposite to the heating and fixing roll; and a pressure applying member in contact with an inner surface of the endless belt and being provided with a pressing surface for pressing the endless belt against the heating and fixing roll along the surface of the heating and fixing roll; wherein pressure exerting on the pressing surface of the pressure applying member is set to a value of or above pressure for suppressing a volume expansion of gas caused by a rise in temperature of the gas taken between the heating and fixing roll and the endless belt.

Abstract: A polygonal mirror of synthetic resin of low cost and which is faithful to the desired standard mirror with respect to flatness, shape, size and other characteristics is made by improving the shape of the polygonal mirror. The mirror includes a plurality of reflection surfaces on side surfaces of a polygonal pillar and a concave fitting portion, which is made instead of a conventional through hole, in its center. The concave portion is used as a reference point for fitting the polygonal mirror over a scanner motor and a convex portion made in a scanner motor side fits into it. Instead of the concave fitting portion, a convex portion can be made in the center of the polygonal mirror with which a concave portion made in the scanner motor side fits.