Patents Assigned to Xerox
  • Patent number: 5956005
    Abstract: There is disclosed an electrocapillary display sheet which utilizes three transparent sheets being spaced from each other and placed parallel to each other. The medial sheet has a plurality of reservoirs which are filled with a dyed or pigmented ink. Each of the reservoirs has an individually addressable voltage source to create an individual electric field. By activating each electric field, the ink from the corresponding reservoir flows out into the space between the medial sheet and one of the other two sheets in order to create a pixel. By removing the electric filed, the liquid which had created a pixel will retreat back into the reservoir.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: September 21, 1999
    Assignee: Xerox Corporation
    Inventor: Nicholas K. Sheridon
  • Patent number: 5956113
    Abstract: A bistable reflective display has a stable focal conic or weakly scattering state even when an applied voltage used to transition to the focal conic state is removed. The bistable reflective display includes first and second substrates, a cholesteric liquid crystal material located between the first and second substrates and silica agglomerates dispersed within the cholesteric liquid crystal material.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: September 21, 1999
    Assignee: Xerox Corporation
    Inventor: Greg P. Crawford
  • Patent number: 5956698
    Abstract: There is disclosed a method for use in a printing system for producing copies or prints in which billing is developed for a customer of the printing system for the produced copies or prints on a basis of a set of accounting information accumulated and stored in an accounting subsystem. The printing system includes an input/output station communicating with the accounting subsystem by way of a network, and the method facilitates the generation of a set of billing/pricing information for transmission to a selected location upon the occurrence of a selected event related to the printing system.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: September 21, 1999
    Assignee: Xerox Corporation
    Inventors: Joel Lacheze, Elizabeth D. Fox
  • Patent number: 5956430
    Abstract: An image information coding apparatus includes a block generator for dividing image information into pixel blocks, each of which consists of a predetermined number of pixels. A block selector selects a pixel block in a position different from that of a pixel block selected in a preceding block line in a main scanning direction from the pixel blocks generated by the block generator. A parameter setting device sets a coding parameter to a predetermined value. A first variable-length coding device conducts variable-length coding of the pixel block selected by the block selector using the coding parameter. A code amount controller changes a value of the coding parameter so that the code amount of the pixel block selected by the block selector and coded by the first variable-length coding device is not more than a predetermined code amount, and a second variable-length coding device conducts variable-length coding of all of the pixel blocks using a coding parameter changed by the code amount controller.
    Type: Grant
    Filed: October 3, 1996
    Date of Patent: September 21, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Setsu Kunitake, Shun-ichi Kimura, Taro Yokose, Yutaka Koshi, Koh Kamizawa
  • Patent number: 5956070
    Abstract: A color printer uses multiple linear arrays of surface emitting lasers of differing wavelengths and polarization states to simultaneously expose widely separated positions on the same or different photoreceptors. Each array is imaged by the same optical system to the photoreceptor. The multiple linear arrays can be closely spaced in a monolithic structure.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: September 21, 1999
    Assignee: Xerox Corporation
    Inventors: Thomas L. Paoli, Tibor Fisli
  • Patent number: 5956470
    Abstract: A method of separating the detection of text/line jaggedness via a resolution enhancement filter from the actual operation of smoothing image jaggedness or flaws is presented. The advantage of this system is that jaggedness detection can be easily done via established resolution enhancement techniques on a binary signal, but the smoothing can operate on a full color 24 or 32 bit system. This method also performs resolution enhancement or smoothing operations on multi-bit pixel depth data wherein separation is first conducted to detect image jaggedness and, secondly, smoothing operations are performed. In one embodiment of the invention, input data can be comprised of a byte stream connected to a mask FIFO through an ink filter, and to data FIFOs. Pre-filters in this case are connected to additional FIFOs and a resolution enhancement filter to receive a jaggedness detection signal.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: September 21, 1999
    Assignee: Xerox Corporation
    Inventor: Reiner Eschbach
  • Patent number: 5955010
    Abstract: An optical transmission line is formed and thereafter solidified using an optical transmission line forming material in the fluid condition. The optical transmission line formed between optical transmission terminals assures higher reliability and never generates disconnection or internal stress therein.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: September 21, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Junji Okada, Masaki Hirota, Masahiro Taguchi, Kenji Kawano, Masao Funada, Takashi Ozawa
  • Patent number: 5953499
    Abstract: The present invention is a system and method for improved rendering of color images, such as by more accurately and/or desirably matching printed outputs to CRT monitor color graphics. A hue rotation system is employed to improve color rendering.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: September 14, 1999
    Assignee: Xerox Corporation
    Inventors: Nagesh H. Narendranath, Fritz F. Ebner
  • Patent number: 5951005
    Abstract: There is provided document stacking stacker for stacking documents exiting a wide format machine, including a sheet tray having a planar base plate for stacking sheets thereon and a side wall for abutting sheets thereagainst; guides disposed adjacent the tray to direct sheets therein at an angle relative to the plane of the base plate, a feeder associated with the guides to feed sheets through the guides into the tray; a corrugating bar includes an array air corrugaters, the air corrugators are connected to an air plenum, each of the air corrugators have an air discharge ports for discharge of air against incoming bottom surface of sheets in the direction of movement of the sheets to corrugated the sheets as the sheet is feed to the tray.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: September 14, 1999
    Assignee: Xerox Corporation
    Inventors: David A. Bartman, Paul M. Achtziger, Daniel L. Morris
  • Patent number: 5953061
    Abstract: Image transduction device pixel cells are described which have analog memory integrated with the pixel transduction elements and arrays made from such pixel cells. The integrated pixel cells are capable of storing information which, for example, can achieve a desired transduction transfer function for a given pixel transduction element. While the present invention may be used with any type of continuously variable, settable, and nonvolatile analog memory, the analog memory is beneficially based on a ferroelectric gate transistor comprised of an amorphous silicon transistor integrated with a ferroelectric gate dielectric layer or an amorphous silicon transistor with a charge storage dielectric gate layer.
    Type: Grant
    Filed: May 8, 1998
    Date of Patent: September 14, 1999
    Assignee: Xerox Corporation
    Inventors: David K. Biegelsen, Warren B. Jackson, Robert A. Street
  • Patent number: 5952638
    Abstract: A method of space efficient electronic payments. A customer initiates an electronic transaction by transmitting a request for payment information to a seller. In response, the customer receives from the seller the payment information needed to generate an electronic payment. The customer determines the reliability of the payment information by authenticating it. If the payment information is authenticated, then the customer generates an electronic payment using the payment information and a master key unknown to the seller. Finally, the customer transmits the electronic payment to the seller along with a request for desired goods and/or services.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: September 14, 1999
    Assignee: Xerox Corporation
    Inventors: Alan J. Demers, Daniel H. Greene, Bridget A. Spitznagel, Roy Want
  • Patent number: 5951006
    Abstract: A decoupling mechanism is provided for passively or actively decoupling an exhaust from a modular air transport system by diverting an amount of air exiting a channel in a first module in a direction other than the process direction through use of the Coanda effect. This decouples the amount of air from a downstream module. This is achieved by providing edge surfaces of the channel outlet, formed on top and bottom plates of the first air module, so that one of the two edge surfaces has a larger radius of curvature than the other. An air vent formed by a gap between the other of the edges and the second module is also provided to assist in the Coanda effect.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: September 14, 1999
    Assignee: Xerox Corporation
    Inventors: David Kalman Biegelsen, Warren Bruce Jackson, Lars Erik Swartz
  • Patent number: 5953565
    Abstract: A developer backer bar having a substantially flat surface for interfacing with a noncontact developer member. The backer bar is arranged so that it can be retracted for clearance purposes when removing or inserting a xerographic CRU. Upon installation of the CRU, the backer bar is biased into position to maintain a development zone within predetermined parameters. The substantially flat surface eliminates or minimizes errors that may result from slight variations in axial alignment between the backer bar and the developer member.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: September 14, 1999
    Assignee: Xerox Corporation
    Inventors: Steven J. Fiore, Dan F. Lockwood
  • Patent number: 5952115
    Abstract: An organic electroluminescent (EL) device with a charge transport component of an indolocarbazole compound represented by Formulas (I) or (II) ##STR1## wherein R and R' are independently selected from the group consisting of hydrogen, alkyl, alkoxyl, aryl, and halogen; m and n are numbers from 0 to 4; A.sup.1 and A.sup.2 are arylene; Ar.sup.1, Ar.sup.2, Ar.sup.3, and Ar.sup.4 are aryl; R.sup.1 and R.sup.2 are independently selected from the group consisting of hydrogen, alkyl, alkoxyl, aryl, and halogen; and p is a number from 1 to 3.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: September 14, 1999
    Assignee: Xerox Corporation
    Inventors: Nan-Xing Hu, Shuang Xie, Zoran D. Popovic, Beng S. Ong, Ah-Mee Hor
  • Patent number: 5952131
    Abstract: A composition including a matrix comprised of particles comprised of a core resin and a shell resin thereover, wherein the core resin contains a covalently bonded photosensitive compound, and wherein the shell resin is the continuous phase of the matrix.
    Type: Grant
    Filed: April 27, 1998
    Date of Patent: September 14, 1999
    Assignee: Xerox Corporation
    Inventors: Eugenia Kumacheva, Jaan Noolandi, Olga Kalinina
  • Patent number: 5953555
    Abstract: A method to automatically adjust the timing of a process control toner patch reading in an electrophotographic printing machine. A solid area patch of width "X" is generated by the ROS at the time "T" from pitch reset. Theoretically, the centerline of this patch (X/2) should arrive at the BTAC location in a time of "T+distance from pitch reset to BTAC". A series of evenly spaced reads are taken by the BTAC of the solid area patch. This sampling generates a waveform. The area of this waveform is calculated and the center of moment is found This "real" centerline of the patch is then compared to the theoretical centerline and the delta (+or -) is stored in memory. This provides a read adjustment to maintain accurate process controls.
    Type: Grant
    Filed: March 22, 1999
    Date of Patent: September 14, 1999
    Assignee: Xerox Corporation
    Inventor: Roger W. Budnik
  • Patent number: 5950868
    Abstract: An apparatus for assisting in filling a container from a hopper containing a supply of powder is provided. The hopper defines a longitudinal axis thereof. The apparatus includes a conduit rotatably connected to the hopper and extending downwardly therefrom. The conduit is adapted to permit a flow of powder therewithin. The conduit defines a longitudinal axis thereof. The conduit further defines an inlet thereof for receiving the supply of powder from the hopper and an outlet for dispelling the powder therefrom. The inlet has an inlet center thereof and the outlet has an outlet center thereof. At least one of the inlet center and the outlet center is spaced from the longitudinal axis of the hopper so that as the conduit is rotated with respect to the hopper, the position of the outlet center with respect to the hopper changes.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: September 14, 1999
    Assignee: Xerox Corporation
    Inventor: Paul M. Wegman
  • Patent number: 5950869
    Abstract: An apparatus for assisting in filling a container from a hopper containing a supply of powder is provided. The apparatus includes a conduit flexibly connected to the hopper and extending downwardly therefrom. The conduit is adapted to permit a flow of powder therewithin. The conduit defines a longitudinal axis thereof and the hopper defines a longitudinal axis thereof. The conduit is flexibly connected to the hopper so that the hopper and the conduit may be arranged in a first position with the longitudinal axis of the hopper and the longitudinal axis of said conduit being coincident and may be arranged in a second position with the longitudinal axis of the hopper and the longitudinal axis of the conduit being skewed with respect to each other.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: September 14, 1999
    Assignee: Xerox Corporation
    Inventor: Paul M. Wegman
  • Patent number: 5953453
    Abstract: Font attributes of characters or letters are estimated by an optical character recognition system using character, run or stroke-based techniques with or without character identification information.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: September 14, 1999
    Assignee: Xerox Corporation
    Inventors: Zhigang Fan, Robert Cooperman, Robert Shuchatowitz, Lucy Hadden, Emil Rainero, Frederick Roberts, Jr.
  • Patent number: 5953464
    Abstract: A method and apparatus for achieving an ultra-small or compressed image buffer images at half the resolution and then scales by two to achieve the device resolution. Acceptable quality can be maintained by identifying edge and interior portions of the page image and using this information to scale intelligently. A split-level frame buffer provides this identification of the image components. Further, an extension of block-truncation coding can be used with the split-level frame buffer to provide up to a 16 to 1 compression for an overall compression of up to 64 to 1. Actual techniques to scale these encodings are described along with new encodings for graphics and text designed this high compression of the image.
    Type: Grant
    Filed: September 23, 1997
    Date of Patent: September 14, 1999
    Assignee: Xerox Corporation
    Inventor: Steven J. Harrington