Abstract: An apparatus for developing a latent image recorded on an imaging surface, comprising a housing defining a chamber storing a supply of developer material comprising toner a porous toner donor member spaced from the surface and being adapted to transport toner to a region opposed from the imaging surface; and means for conveying said developer material in the chamber of said housing onto said donor member.

Abstract: Disclosed is a process which comprises reacting a polymer of the general formula ##STR1## wherein x is an integer of 0 or 1, A is one of several specified groups, such as ##STR2## B is one of several specified groups, such as ##STR3## or mixtures thereof, and n is an integer representing the number of repeating monomer units, with an acetyl halide and dimethoxymethane in the presence of a halogen-containing Lewis acid catalyst and methanol, thereby forming a haloalkylated polymer. In a specific embodiment, the haloalkylated polymer is then reacted further to replace at least some of the haloalkyl groups with photosensitivity-imparting groups. Also disclosed is a process for preparing a thermal ink jet printhead with the aforementioned polymer.

Abstract: A printing machine having a dryer for drying liquid ink printing deposited in a print zone on a surface of a recording medium moving along a path. The dryer includes a heat source, generating heat energy, disposed adjacently to the path, for heating the recording medium and drying the ink. A reflector system, including a first reflector and a second reflector, direct the heat energy toward another surface of the recording medium. In one embodiment, the heat source comprises a quartz tube having a reflective coating, acting as the first reflector, deposited on a surface of the tube, and the second reflector directs additional heat energy towards the recording medium.

Abstract: A system and method for processing image data converts a pixel of image data having a first resolution to a plurality of subpixels, the plurality of subpixels representing a second resolution, the second resolution being higher than the first resolution. The plurality of subpixels are thresholded to generate a group of subpixel values for each pixel and a threshold error value. It is then determined if the group of subpixel values from the thresholding process produce a pattern containing an isolated subpixel. If the group of subpixel values from the thresholding process produce a pattern containing an isolated subpixel, the group of subpixel vales is modified to produce a pattern without an isolated subpixel. The modification process produces a subpixel error value which is diffused in the slowscan direction to adjacent pixels.

Abstract: An image signal encoding device which includes a code transforming unit. The code transforming unit includes a separation unit which separates mode information from first code data, a locally decoding unit which locally decodes the first code data using a decoding operation corresponding to the mode information and outputs locally decoded pixel block, and a second encoding unit which encodes the locally decoded pixel block using an encoding operation corresponding to the mode information and outputs second code data. According to the image signal encoding device, the first code data is re-encoded into the second code data having a higher compressibility so as to perform efficient data transmission and storage.

Abstract: A system for printing background and foreground colors in response to mask data and printing instructions. Page description language data is separated onto three lines, two for Contone and solid colors, and one for control (mask data and instructions). The mask and instruction data is transformed into a series of multi-bit command words, each describing a pixel in terms of 1) control tag bits to specify color, 2) object optimized rendering tag bits to describe the type of color (solid, text, sampled or line art), 3) color space transformation bits to control conversion from other spaces to CYMK and 4) format tags to specify the number of bits per pixel. This series of command words combines information on one line that required at least two lines in the prior art, and the data is in easily compressable form, resulting in simplified hardware.

Abstract: In a shared users printing and mailboxing system, with a shared remote printer with an operatively connecting array of lockable mailboxes, in which system electronic print jobs from different users at different locations may be electronically sent to be printed, which hardcopy print jobs are automatically fed into respective selected lockable mailboxes, wherein the printer has an internal paper path for this printing with sheet jam clearance capability and a system for signaling a sheet jam, and at least one openable printer access door providing access to the paper path for jam clearances; a print job security improvement system with an automatic locking system for electronically locking the printer access door and an access door on the mailboxing system during printing of security sensitive print jobs to prevent access to the internal printer paper path, but automatically unlocking the printer access door after the hardcopies have reached the selected mailboxes if there is no sheet jam signal, and maintaini

Abstract: A method of holding and transporting a hollow flexible belt throughout a coating process. The method includes placing an expandable insert into the hollow portion of a seamless flexible belt, and expanding the insert until it forms a chucking device with a protrusion on at least one end. A mechanical handling device is then attached to the protrusion, and will be used to move the chuck and the belt through the dipping process, as materials needed to produce a photosensitive device are deposited onto the surface of the belt, allowing it to be transformed into an organic photoreceptor. The chucking device and flexible belt are then removed from the mechanical handling device, the belt is cut to the desired width, and the chuck is removed from the inside of the photoreceptor.

Abstract: A compactly stored word list that includes a directed graph data structure is used for word to number (W/N) and number to word (N/W) mapping. Each word accepted by the data structure is mapped to a unique corresponding number within a dense set of numbers ranging from zero to one less than the total number of acceptable words. Some common suffixes are collapsed into shared branches, which is possible because the numbers are not stored within the word list. In addition, some branches of the data structure can be skipped during mapping because of information associated with branch points. That information permits the mapping scan to continue with a next branch or with an alternative branch. That information also indicates the number of suffix endings in the next branch; this number is used to keep a count of the word endings during word to number mapping; it is also used both to determine whether to continue with the next branch and also to reduce the number being mapped during number to word mapping.

Abstract: An inkjet printhead addressing and firing design which minimizes voltage drop differential occurring on a power bus which supplies power to fire individual ink jets due to current loads needed to fire the individual ink jets. The voltage drop differential can be reduced in part by firing a group of individual jets which are spaced out over the entire length of the array instead of firing a group of adjacent jets. Spacing of the firing jets will insure that less than an entire amount of current needed to fire a group of jets will be needed in the center of the bus. Reducing the amount of current needed to travel the length of the bus reduces the voltage drop differential on the bus caused by current conduction along the bus.

Abstract: A document recognizing system in which a document-forming work station coupled with a scanner, a file station for storing image data, and a recognition work station for recognizing a document image are interconnected through a network. In the document recognizing system, the character image data entered from the scanner is transferred to the file station through the document-forming work station, and the recognition result of the character image data by the recognition work station is also transferred to the file station and stored therein, allowing the operator to read out a necessary recognition result at the time of forming a desired document in the document-forming work station.

Abstract: A process for preparing coatings or layers containing a fluorinated carbon filled fluoroelastomer wherein the resistivity of the fluorinated carbon filled fluoroelastomer is controlled.

Abstract: Fluoroelastomer surfaces and a method for providing a fluoroelastomer surface on a supporting substrate which includes dissolving a fluoroelastomer; adding a dehydrofluorinating agent; adding an amino silane to form a resulting homogeneous fluoroelastomer solution; and subsequently providing at least one layer of the homogeneous fluoroelastomer solution to the supporting substrate.

Abstract: An image detection and pixel processing system includes a plurality of position sensitive detector elements arranged to receive an image. Each position sensitive detector element provides information for determining both a total light intensity value within the position sensitive detector element and a centroid of light intensity indicative of light intensity position within the position sensitive detector element. An image processing assembly receives information from the plurality of position detector elements with the image processing assembly relating a pixel and its encompassed subpixel area to each corresponding position detector element. The total light intensity within the pixel and the centroid of light intensity within the subpixel is determined, with the image processing assembly rendering each subpixel area as an edge when magnitude of the centroid of light intensity is large.

Abstract: Semiconductor chips, such as photosensor arrays for a full-page-width scanner or printhead chips for a full-page-width ink-jet printer, are mounted on a substrate to maintain reasonably consistent spacing among adjacent chips. To remove a defective chip from the array, the substrate is urged evenly against a work surface defining a convex bow. Alternately, back-cuts are provided along abutting edges of the chips, and the silicon around these back-cuts can be sawed away to space defective chips from neighboring good chips. By increasing the spacing of a defective chip from neighboring chips, the defective chip can be removed while minimizing the risk of damage to neighboring chips. Also, batches of chips can be originally manfactured on a single wafer as either "regular" chips or "replacement" chips, with the replacement chips being slightly shorter in a critical dimension.

Abstract: An electrostatographic printing machine having an imaging member with a surface voltage potential and a control system including first and second reference values. A sensor measures first and second surface voltage potentials that are compared to the first and second reference values to provide first and second error signals to control first and second process stations in the printing machine. A first compensator responds to the first error signal to provide a first weighted adjustment to the first process station and a second weighted adjustment to the second process station. A second compensator responds to the second error signal to provide a first weighted adjustment to the second process station and a second weighted adjustment to the first process station in order to compensate for coupling effects between adjustments to either the first or second processing stations.

Abstract: The improved optical deflector includes a polygonal mirror to be rotated for deflecting an incident light beam for scanning purposes and a motor for rotating the polygonal mirror, and the rotating shaft of the motor is provided with a reference seat on which the polygonal mirror is to be mounted in close contact; the rotor of the motor is solely composed of a rotor magnet that is mounted on the rotating shaft, with the polygonal mirror being disposed between the reference seat of the rotating shaft and the rotor magnet; the rotor magnet is held in close contact with a plane of the polygonal mirror which is perpendicular to the rotating center axis thereof. Even if the optical deflecting element such as a polygonal mirror is rotated at high speed, the runout of the rotor of the motor is suppressed to a minimum without causing a deviation of the scanning light beam, thereby insuring efficient rotation of the deflecting element.

Abstract: A digital color printing method is described for printing process black over a background color, which makes use of color order information--that is, the order in which process colorants are transferred to paper--in determining and satisfying pile height constraints for optimal quality. In certain printing systems such as xerographic systems, printing problems can occur when process black, composed of a mixture of colorants such as cyan, magenta, yellow, and black, is printed over a color background. One such problem for example occurs when a process black containing all colorants at maximum or near-maximum value is printed on a color field. In this case, the excessive toner pile height of such a process black can sometimes cause objectionable deletions in the surrounding color field, caused by interference in the transfer of toner to the background color field surrounding the process black.

Abstract: A gyricon or twisting-ball display having superior reflectance characteristics comparing favorably with those of white paper. The display is based on a material made up of optically anisotropic particles, such as bichromal balls, disposed substantially in a monolayer in a substrate. The particles are closely packed with respect to one another in the monolayer, preferably so that adjacent particle surfaces are as close to one another as possible. A rotatable disposition of each particle is achievable while the particle is thus disposed in the substrate; for example, the particles can already be rotatable in the substrate, or can be rendered rotatable in the substrate by a nondestructive operation performed on the substrate. In particular, the particles can be situated in an elastomer substrate that is expanded by application of a fluid thereto so as to render the particles rotatable therein. A particle, when in its rotatable disposition, is not attached to the substrate.

Abstract: An image resolution conversion method converting an image of a first resolution represented by multivalued digital data into an image of a second resolution by interpolation, comprises the steps of assigning a block defined by a plurality of pre-conversion pixels of the first resolution image to each post-conversion pixel, performing edge detection in the block based on data for each pixel of the block, and performing resolution conversion by a first interpolation method when at least the result of the edge detection satisfies predetermined conditions, and performing resolution conversion by a second interpolation method when the result of the edge detection does not satisfy the predetermined conditions.