Patents Assigned to Xerox
  • Patent number: 5544875
    Abstract: A paper stacking apparatus including a paper stacking device for stacking plural sheets of paper thereon; a paper size detecting device for detecting a size of the paper to be stacked on the paper stacking device; a paper stack detecting device for detecting whether the paper is present or absent on the paper stacking device; and a control device for inhibiting stacking of the paper when the paper size detected by the paper size detecting device is different from a preset paper size, and for allowing the stacking when absence of the paper on the paper stacking device is detected by the paper stack detecting device during inhibition of the stacking. Accordingly, the control device inhibits paper having any sizes other than the preset paper size from being stacked on the top of stacked sheets of paper present on the paper stacking device and restores allowance of stacking when the paper present on the paper stacking device is removed during inhibition of stacking.
    Type: Grant
    Filed: October 12, 1994
    Date of Patent: August 13, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Noriyuki Obara
  • Patent number: 5545283
    Abstract: An apparatus and method for bonding wafer pairs. The apparatus includes a heated platen surrounded by a pressurization vessel. The heated platen includes channels connected to a hole which runs through the heated platen. Wafer pairs are placed on the top surface of the platen, a rubber mat is placed over the top of the wafer pairs, and a vacuum is drawn through the hole and the channels. The rubber mat compresses the wafer pairs. The platen is heated for the bonding process. The pressurization chamber is pressurized supplying additional bonding pressure to the wafer pair. Once sufficiently heated, the heated platen is liquid cooled completing the bonding process.
    Type: Grant
    Filed: February 8, 1995
    Date of Patent: August 13, 1996
    Assignee: Xerox Corporation
    Inventors: David J. Collins, Daniel E. Kuhman, Herman A. Hermanson
  • Patent number: 5546529
    Abstract: A method and apparatus for representing the results of a search of a database. The present invention provides for creating a view of database search results via a tree structure in which detail is selected and context preserved. In the present invention, the tree structure is created based on user specified parameters. These parameters represent attributes of documents stored in the database and may differ from the search parameters. The tree structure is then mapped to a static reference surface which is visually perceived as three-dimensional. The reference surface is comprised of a detail area where detail of the tree structure is displayed and a context area for displaying other portions of the tree in less detail but which conveys to the viewer a sense of context. The tree structure may be scrolled about the reference surface to bring portions of the structure into a direct detail view while retaining a context view of the overall tree.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: August 13, 1996
    Assignee: Xerox Corporation
    Inventors: Frank H. Bowers, Stuart K. Card
  • Patent number: 5545913
    Abstract: An assembly facilitates mounting a set of abutted semiconductor chips, such as chips aligned to form a single full-page-width linear array of photosensors in a digital scanner or copier. An elongated bead of electrically conductive adhesive extends along a surface of a support substrate. A plurality of semiconductor chips is disposed along the elongated bead, each semiconductor chip including a linear array of photosensors on a front surface thereof, and a back surface attached to the support substrate by the electrically conductive adhesive. A connection block is disposed along another portion of the elongated bead, the block including a first surface contacting the bead, a second surface, and a conductor extending from the first surface to the second surface.
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: August 13, 1996
    Assignee: Xerox Corporation
    Inventors: Kraig A. Quinn, Josef E. Jedlicka, Brian T. Ormond
  • Patent number: 5546111
    Abstract: A raster output scanning system is disclosed which modifies a train of pixel information used for modulating a light beam to improve the image contrast. In this invention, all the On pixels which have at least one transitional edge will be modified in such a manner that the pulse width of the modified pixels will be shorter than the allocated pulse width for each pixel and the pulse amplitude of the modified pixels will be higher than the amplitude of the unmodified pixels. However, the product of the pulse width and the pulse amplitude of the modified pixels are equal to the product of the pulse width and the pulse amplitude of the unmodified pixels. The modified train of pixel information of this invention creates an exposure profile on the photoreceptor plane with less smearing effect and less variation of the pixel width in accordance with the variation of the xerographic threshold.
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: August 13, 1996
    Assignee: Xerox Coporation
    Inventor: Patrick Y. Maeda
  • Patent number: 5546201
    Abstract: A double bounce facet tracking polygon in which a reflective mode replicated diffraction grating element on a flat facet on the double bounce facet tracking polygon is used to provide a small angle deflection which is used in a passive facet tracking system.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: August 13, 1996
    Assignee: Xerox Corporation
    Inventor: Jean-Michel Guerin
  • Patent number: 5543894
    Abstract: An image processing apparatus, a first servo system has a closed loop digital control with a first reference control signal for driving a photosensitive member, and a second servo system has a closed loop digital control with a second reference control signal for driving a prefuser transport, and a master control responds to the servo system closed loop digital controls to synchronize the speed of the prefuser transport with the speed of the photosensitive member.
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: August 6, 1996
    Assignee: Xerox Corporation
    Inventor: Kevin M. Carolan
  • Patent number: 5543611
    Abstract: The present invention presents an apparatus and method for efficiently and automatically monitoring the power output of laser diodes used to provide the scanning beams in a ROS system. Light radiated from the back facet of the laser diode is focused by a projection means, in a preferred embodiment, a ball lens onto a photosensor. The photosensor output is proportional to the power output of the diode associated with the photosensor. The use of a projection means provides immunity from stray light and from cross talk between closely positioned laser diodes in a multiple diode configuration and yield increase sensitivity of the photosensor.
    Type: Grant
    Filed: February 6, 1995
    Date of Patent: August 6, 1996
    Assignee: Xerox Corporation
    Inventor: John R. Andrews
  • Patent number: 5543838
    Abstract: A photosensitive apparatus comprising a plurality of sets of photodiodes and a plurality of amplifiers, each amplifier being operatively connected to one set of photodiodes. A transfer circuit is associated with each photodiode for loading a charge from the photodiode to a storage node associated therewith. Readout means sequentially unload charges from each storage node in the set of transfer circuits through the amplifier, so that multiple photodiodes may operate through a single amplifier.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: August 6, 1996
    Assignee: Xerox Corporation
    Inventors: Paul A. Hosier, Jagdish C. Tandon
  • Patent number: 5543896
    Abstract: A method of development control by storing a reference tone reproduction curve and providing a single test pattern including a scale of pixel values in the interdocument zone of an imaging surface. The test pattern is then sensed in the interdocument zone and a control respond to the sensing of the test patern and the reference tone reproduction curve to adjust the machine operation for print quality correction.
    Type: Grant
    Filed: September 13, 1995
    Date of Patent: August 6, 1996
    Assignee: Xerox Corporation
    Inventor: Lingappa K. Mestha
  • Patent number: 5543829
    Abstract: A raster scanning system has an image receiving device that receives a light beam, a scanning device for scanning the light beam across the image receiving device and a mirror located in the path of the light beam between the scanning device and the image receiving device for directing the light beam to the image receiving device. An adjusting device adjusts a curvature of the mirror to correct for bow of the light beam on the image receiving device.
    Type: Grant
    Filed: October 19, 1994
    Date of Patent: August 6, 1996
    Assignee: Xerox Corporation
    Inventor: Tibor Fisli
  • Patent number: 5543259
    Abstract: Disclosed are dry and liquid developers suitable for the development of electrostatic latent images. The developers contain a colorant selected from the group consisting of: (a) those of Formula I ##STR1## wherein R.sub.1 is an electron withdrawing group, R.sub.2 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, and substituted arylalkyl, R.sub.3 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, and substituted arylalkyl, and Ar is selected from the group consisting of aryl, substituted aryl, arylalkyl, and substituted arylalkyl; (b) those of Formula II ##STR2## wherein R.sub.1 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, and substituted arylalkyl, R.sub.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: August 6, 1996
    Assignee: Xerox Corporation
    Inventors: William M. Schwarz, Timothy J. Fuller
  • Patent number: 5543177
    Abstract: Disclosed are marking materials containing retroreflective fillers and processes for the use thereof. In one embodiment, images containing retroreflective fillers are generated on paper by any suitable means, such as electrostatic imaging and development with either dry or liquid developers, ink jet printing, strip-out development processes, or the like, and the images thus generated are used to control a document reproduction system. In another embodiment, images containing retroreflective fillers are generated on a movable part in an imaging apparatus, such as an imaging member, an intermediate transfer member, or the like, by any suitable means, and the images thus generated are used to impart information regarding the relative position of the movable part with respect to the copier or printer containing the movable part.
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: August 6, 1996
    Assignee: Xerox Corporation
    Inventors: Jan D. Morrison, Edward F. Grabowski, Virginia E. Dotschkal, Anita P. Lynch, Jerome E. May
  • Patent number: 5543237
    Abstract: An inorganic thin film EL device comprises, on an insulating substrate 1, a back electrode 2, an insulating layer 3, a light emission layer 4, an insulating layer 3, and a transparent electrode 5 formed on the substrate 1 in this order. The emission layer comprises a fluoride of an alkaline earth metal and at least one member selected from the group consisting of rare earth element metals and compounds thereof at a mixing ratio by weight of 10:90 to 95:5. The rare earth element is, for example, cerium, praseodymium, neodium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and mixture thereof. The compounds may be those compounds of the rare earth elements and fluorine, chlorine, bromine, iodine and oxygen.
    Type: Grant
    Filed: September 9, 1993
    Date of Patent: August 6, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Masao Watanabe
  • Patent number: 5543935
    Abstract: An image processing system for preparing a document image for printing, each discrete area or pixel in the image described by a signal having a number of possible states greater than can be rendered by a selected printer. In such a system a screening pattern is used which distributes screen values through the image in accordance with the pattern of a space filling curve. Each signal is thresholded against a threshold determined by such ordering and output a signal renderable by the selected printer. A straight forward function relates threshold value in a screen matrix of values and the length of a space filling curve at any point in an image. The nature of certain space filling curves, allows the generation of two reasonably sized lookup tables providing the length of the curve at any point on the page.
    Type: Grant
    Filed: November 18, 1994
    Date of Patent: August 6, 1996
    Assignee: Xerox Corporation
    Inventor: Steven J. Harrington
  • Patent number: 5543909
    Abstract: A stalled roll registration method and apparatus used as the sole timing adjustment in a paper path includes a clutch or motor driven registration nip, a buckle chamber and two sensors. After a sheet reaches a sensor upstream of the registration nip, the sheet lead edge advances a fixed distance into the stalled registration nip in order to buckle a known amount. Afterwards, the registration nip advances the deskewed sheet until a second sensor downstream of the registration nip is reached. The registration nip then stops, allowing the sheet to form an upstream buckle. This second buckle can be large since the lead edge is constrained by the registration nip. Therefore, large timing variations between sheet locations and image locations can be accommodated.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: August 6, 1996
    Assignee: Xerox Corporation
    Inventor: Lisbeth S. Quesnel
  • Patent number: 5544267
    Abstract: Image data define an image that shows an input graphical representation whose configuration represents information. The image can show a sketch, for example. The image data are used to obtain category data indicating a category of graphical representations. For example, the category data could indicate any of X-Y graph, directed graph, undirected graph, bar graph, pie chart, line graph, scatter plot, circuit diagram, flow chart, Venn diagram, state-transition diagram, tree, table, matrix, or array. The category data could also indicate a specific category within a generic category such as bar graph or pie chart. The category data can be obtained by determining whether the graphical representation satisfies a constraint on each category.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: August 6, 1996
    Assignee: Xerox Corporation
    Inventors: James V. Mahoney, Satyajit Rao
  • Patent number: 5544321
    Abstract: The present invention describes a method for superimposing prespecified locational, environmental, and contextual controls on user interactions, including interactions of mobile users, with computational resources. A system is described for electronically monitoring contextual information concerning users and machines, including state and locational information including proximity. Interaction policies, including user specified interaction policies, may be registered on an identifiable address path. Methods are described for detecting, selecting and controlling computercontrolled devices, based on the proximity of the device to the user, the current context of the user, the location of other nearby users and devices, and the current state of the devices. Temporary transfer of control, including exclusive control, of particular computers and computer controlled devices to individual users based on the context and environment in proximity to those computing devices is also described.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 6, 1996
    Assignee: Xerox Corporation
    Inventors: Marvin M. Theimer, Michael J. Spreitzer, Mark D. Weiser, Richard J. Goldstein, Scott A. Elrod, Daniel C. Swinehart, William N. Schilit, Robert T. Krivacic, Roy Want
  • Patent number: 5543028
    Abstract: An electroforming/electrodeposition process and apparatus includes a first electrode, a second electrode spaced from the first electrode, a channel defined by the first and second electrodes and at least one electrically nonconductive or poorly conductive shield disposed adjacent at least one electrode. The shield(s) define(s) a region of the channel wherein the surface of a mandrel placed in that region experiences substantially uniform current density. The apparatus may contain additional electroforming/electrodeposition and/or other steps and may be arranged in a carousel apparatus with one or more mandrels to permit continuous operation of the apparatus.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: August 6, 1996
    Assignee: Xerox Corporation
    Inventors: William G. Herbert, Patricia Bischoping, Robert P. Altavela, Lawrence Kotowicz, Peter J. Schmitt, Ronald E. Jansen, John H. Lennon, Henry G. Grey
  • Patent number: 5543825
    Abstract: The present invention is a novel raster output scanner (ROS) configuration that employs modulated laser diodes as the light source. Each laser diode is coupled to a dedicated driver that modulates the light beam according to digital video signal data. The present invention employs a single-channel acoustic-optic cell that deflects the multiple beams to maintain proper facet tracking. A single transducer is coupled to the single-channel acoustic-optic cell that generates the necessary acoustic wave to maintain proper tracking.
    Type: Grant
    Filed: November 17, 1993
    Date of Patent: August 6, 1996
    Assignee: Xerox Corporation
    Inventors: Tibor Fisli, Jean-Michel Guerin, Patrick Y. Maeda, Donald J. Quant