Abstract: A porous silicon Light Emitting Diodes (LEDs) device and method for fabricating LEDs with supporting circuits on a silicon chip or wafer for a Full Width Array in which a switch diode structure is used to form the porous silicon LED element and later drives the LED after the LED is fabricated. The LED is formed by defining an area in the switch diode for placing an LED element. Epi silicon is deposited in the defined area; and the epi silicon is electrochemical etched to produce porous silicon. This procedure creates column-like Si structures of nanometer dimension which can efficiently emit visible to infrared light at room temperature. Next, the porous silicon LED chip can be cut and butted without excessive damage. In this way, the chips bearing both LEDs and drive circuitry are made of silicon and can be cut and accurately butted by known techniques to form a low cost, high resolution Full Width LED array.

Abstract: In a networked or other shared users electronic printing system for printing plural print jobs of plural printed sheets of the different users, with a printer mailbox having a sheet distribution system for automatically directing and stacking into different individual mailbox bins, which are electronically assigned to different respective users, the respective print jobs of the respective users, a bin almost-full sensing system detects and signals that the stacking level of the printed sheets in the bin has reached a preset almost-full level which is less than the preset limited sheet full stacking capacity of the bin.

Abstract: A font data generator provides bit map font data free from blurs and thickening in character strokes from data expressing outline segments. The font data generator includes an outline data generating unit for providing pixel data representing the entire outline of a character. A selected outline data generating unit generates, from the pixel data representing the entire outline of a character, pixel data representing only some outline segments. In one embodiment, outline segments are seleced if, when the entire outline is traced counter-clockwise, the segments must be traced in either left or down directions. A filling data generating unit generates, from data expressing the outline segments of a character, pixel data to fill in the area surrounded by the outine segments. A data synthesizing means synthesizes the selected outline pixel data and the filling pixel data to form a character.

Abstract: A xerographic print engine includes a rotatable photoreceptor belt. The photoreceptor is exposed by delivering energy to the inward-facing side of the belt, and the electrostatic latent image is developed by applying toner to the outward-facing side of the belt. The system is particularly useful for liquid-development based xerographic systems, as multiple layers of toner can be accumulated on the outward-facing side of the photoreceptor belt without interfering with subsequent exposure steps. A cylindrical lens is in contact with the photoreceptor belt and is adapted to focus light from a light source at a developing region of the photoreceptor belt.

Abstract: A multicolor image forming apparatus having a plurality of unicolor imaging units each equipped with at least a developing device anchored to a unit frame and an image carrier drum anchored removably to the unit frame with a predetermined space kept to a roll of the developing device. The unicolor imaging units are installed removably in the apparatus body while being supported respectively by means of slide rails attached to frames of the apparatus body, and toner images produced individually by the unicolor imaging units are transferred onto a recording medium to form a multicolor image.

Abstract: A flexible imaging sheet and a method of constructing a flexible imaging sheet is disclosed. The method of constructing a flexible imaging sheet comprises a step of overlapping, a step of joining, and a step of shaping. In the step of overlapping, a first marginal end region and a second marginal end region of a sheet are overlapped to form an overlap region and a non-overlap region. In the step of joining, the first marginal end region and the second marginal end region of the sheet are joined to one another by a seam in the overlap region. In the step of shaping, the overlap region is shaped to form a generally planar surface co-planar with a surface of the non-overlap region. The flexible imaging sheet comprises a first marginal end region and a second marginal end region The first marginal end region and the second marginal end region are secured by a seam to one another in the overlap region.

Abstract: A job set compiler for compiling the printed sheets output of a printer or copier into superposed stacks of the printed sheets, inverted. The printed sheets are sequentially individually fed into a first sheet retaining unit, which rotates to move the sheet into a second sheet retaining unit neatly compiling a plurality of the sheets therein in an arcuate configuration as a complied set. The second sheet retaining unit then rotates to eject the compiled set of plural sheets. The first sheet retaining unit is concentrically rotatably mounted inside of the second sheet retaining unit. A stapling system may be provided for stapling the compiled sets while they are so held in the second sheet retaining unit.

Abstract: In a hard-copy scanner in which a set of photosensitive silicon chips are abutted to form a single page-width array of photosensors, the photosites at the critical ends of each chip are specially shaped to ensure an even spacing of all photosites along the array, taking into account imprecisions in the dimensions of individual chips. The special shape of the end photosite is trapezoidal or a variation of trapezoidal.

Abstract: In an apparatus for exposing a set of discrete locations on a photosensitive surface, such as an electrophotographic printer, a scanner transmits a light beam along a scan path onto the photosensitive surface. An optical element, interposed in the scan path between the photosensitive surface and the scanner, defines a plurality of apertures therein where no more than one aperture is disposed at any location along a linear dimension of the optical element parallel to the scan direction. The light beam transmitted through each aperture exposes a discrete location on the photosensitive surface.

Abstract: Disclosed is an ink composition which comprises an aqueous phase, an oil phase, a photochromic material, and a surfactant, said ink exhibiting a liquid crystalline gel phase at a first temperature and a liquid microemulsion phase at a second temperature higher than the first temperature.

Abstract: A process for avoiding or minimizing comet formation which comprises dispersing in a magnetic toner comprised of resin particles, a first magnetite, carbon black, charge additive, and wax, a second soft magnetite; and wherein the toner contains a silica surface additive.

Abstract: A system for sealing a member rotating about an axis of a support is provided. The system includes a magnetic field producing member and a magnetizable member. The magnetizable member is positioned adjacent the magnetic member. The magnetizable member has at least a portion thereof progressively increasing in thickness in a direction substantially parallel to the axis as distance from the axis increases.

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: Ink-jet recording apparatus to reduce the change of the pressure of ink in the inside of ink discharge nozzles in an ink-jet recording apparatus as well as to improve the efficiency of use of ink. In the condition where an ink tank is used in an ink-jet recording apparatus, an ink joint provided in the lower end portion of the ink tank communicates with ink discharge nozzles of a head tip. Upon reception of air pressure from above, ink kept by a porous ink keeper stored in the inside of the ink tank is permitted to be supplied to the head tip. The ink tank is formed so that the internal volume of the ink tank increases in order from the lower portion to the upper portion. Accordingly, when the initial residual quantity of ink is relatively large, the change of the pressure (negative pressure) of ink in the inside of the head tip as caused by consumption of ink can be reduced.

Abstract: A method of arbitrary image resolution conversion takes an original print ready image at a first resolution and orientation and simulates printing of that image by creating a representation of a page at a particular resolution and orientation using a suitable spot model for the reconstruction function. The image is then filtered with a low pass filter and sampled with an aperture that corresponds to the desired output. The image data, which may be definable at several bits per pixel, is then made print-ready by reducing the number of bits defining each pixel to a valid output state. The reduction step is accomplished through error diffusion methods that maintain the local area gray density level. The filtering step reduces moire in the converted image.

Abstract: A graphical input and display system for creating and manipulating an abstract graphical image by decomposing it into abstract elemental objects and organizing the elemental objects into a set of perceptually coherent composite objects. The system includes an input device for entering the graphical image, such as a mouse or digitizer and electronic stylus, a display, and a function selection system for manipulating the graphical image. The system decomposes the graphical image entered onto the display into abstract elemental objects each consisting of one or more consecutive "on" pixels within the image. The system organizes the elemental objects into composite objects, which are abstract groups of elemental objects, such that each elemental object belongs to one or more composite objects and each composite object contains one or more elemental objects. The elemental and composite objects are linked in a lattice data structure stored in system memory.

Abstract: A toner composition comprised of pigment and an amic acid based resin.

Abstract: A graphic display system is provided with: a memory unit for storing graphic data having a plural number of graphic layers composed of a plural number of graphic elements accorded respectively with attribute information; a displaying unit for displaying the graphic data; and a selecting unit for selecting the graphic layers to be displayed on the displaying unit. A setting unit is provided for each of the graphic layers and setting the display attributes for the display of the individual graphic elements on the graphic layer with the displaying unit. A display control unit reads the graphic layers, as selected by the selecting unit out of the memory unit, and displays the graphic layers, thus read out, in overlapping relationship on the display screen of the displaying unit based on the results set up by the setting unit.

Abstract: A two photoconductive stack photoreceptor has an electrically conductive substrate upon which are two photoconductive stacks with each photoconductive stack sensitive to or accessible to a different wavelength of light. After charging of the photoreceptor, areas of the photoreceptor are exposed to no light beams, a first light beam, a second light beam or both light beams which allows different toners to be deposited on the photoreceptor in response to the remaining areas of charges. This two photoconductive stack photoreceptor produces a color xerographic printing system. The photoreceptor can also have multiple photoconductive stacks.

Abstract: A color image forming apparatus for forming a color image by transferring images of different colors on a recording medium in a multi-transfer mode. The color image forming apparatus includes a plurality of image forming units for successively forming color images of different colors according to image information, a transfer/transport unit for transporting different color images formed by the image forming units in a state that the color images are successively transferred thereon, a detecting unit for detecting patterns used for detecting an out-of-registration of the color images formed on the transfer/transport unit by the image forming units, and a correcting unit for correcting positions of the color images to be transferred on the transfer/transport unit according to data signal output from the detecting unit.