Patents Assigned to Xerox
  • Patent number: 5532839
    Abstract: In a digital imaging document handling system for sequentially feeding plural document sheets in a document feeding path from a document input to an electronic imaging station, wherein document sheet feeding stoppages in the document feeding path are detectable, a simplified job recovery system is provided by providing a duplicate image detection system for the automatic deletion of duplicate electronic document page images. The duplicate page images may be detected efficiently without full image comparisons by checksumming the pixels of multiple cell areas for the page, deleting the least significant figures, and comparing the respective cell checksums.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: July 2, 1996
    Assignee: Xerox Corporation
    Inventors: Thomas R. Beikirch, Margaret C. Plain
  • Patent number: 5532804
    Abstract: A developing device, which has a developer carrying member forming a magnetic brush of a two-component developer and is capable of carrying out a development while it is not in contact with an electrostatic latent image retaining member, is improved so as to reproduce an image at a sufficient image density.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: July 2, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kei Hirata, Tomoyoshi Chihara, Nobumasa Furuya, Takeshi Sumikawa
  • Patent number: 5532327
    Abstract: A solution polymerization process for producing an organic polymer from styrene and at least one other polymerizable monomer comprising providing a liquid reaction medium suitable for conducting said polymerization, wherein the reaction medium contains styrene and a polymerizable monomer other than styrene; and, anionically polymerizing styrene and monomer, thereby forming random copolymer chains, wherein the total quantity of said styrene used in said polymerization is at least 50% by weight based on the total weight of styrene and other polymerizable monomers used in the polymerization. A second embodiment comprises a copolymer made by the above-described method.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: July 2, 1996
    Assignee: Xerox Corporation
    Inventors: Robert D. Bayley, Thomas R. Hoffend, Timothy J. Fuller, Suresh K. Ahuja
  • Patent number: 5531815
    Abstract: A thermal ink jet printing composition contains a betaine zwitterionic base and a quasisurfactant penetrant.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 2, 1996
    Assignee: Xerox Corporation
    Inventors: Kurt B. Gundlach, Richard L. Colt
  • Patent number: 5532845
    Abstract: A digital scanner, which is capable of scanning a document having L scanlines, includes M optical scanning systems wherein M is equal to or greater than 2. Each optical scanning system scans only L/M scanlines of the document such that an area of the document scanned by a single optical scanning system does not overlap an area of the document scanned by another single optical scanning system. The digital scanner also includes a plurality of parallel image processing circuits, each connected to one of the M optical scanning systems, to produce a plurality of sets of digital image data. Each set of image data corresponds to an image scanned by a single optical scanning system. A stitching circuit is connected to the plurality of parallel image processing circuits to stitch together the plurality of sets of digital image data to produce a complete image.
    Type: Grant
    Filed: November 21, 1994
    Date of Patent: July 2, 1996
    Assignee: Xerox Corporation
    Inventor: Donald J. Gusmano
  • Patent number: 5531872
    Abstract: A process is disclosed for fabricating a photoconductive member comprising: depositing a photoconductive material and a charge transport material on a substrate, sequentially in any order, or simultaneously, wherein the photoconductive material, the charge transport material, or both, are electrophoretically deposited onto the substrate from a liquid composition.
    Type: Grant
    Filed: August 11, 1994
    Date of Patent: July 2, 1996
    Assignee: Xerox Corporation
    Inventors: Rachael A. Forgit, Ronald E. Godlove, John S. Chambers, Huoy-Jen Yuh, Robert E. McCumiskey, Kamran U. Zaman, William G. Herbert
  • Patent number: 5533153
    Abstract: In an optical relay amplifier of the present invention, an inputted signal optical is divided into a plurality of lights by the first optical coupler. One of the divided inputted signal lights is amplified by an optical amplifier, the other inputted signal light is made to pass through a bypass optical waveguide path provided. The amplified light from the optical amplifier is coupled with the light that has passed through the bypass optical waveguide path by a second optical coupler, and the optical amplifier is a semiconductor laser amplifier including a V-shaped optical waveguide path and two end portions connected with the optical waveguide paths of the first and second optical couplers. A reflecting surface is formed in a returning end portion of the V-shaped optical waveguide path.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: July 2, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Takeshi Ota
  • Patent number: 5531813
    Abstract: A polyorgano amino functional oil release agent having at least 85% monoamino functionality per active molecule to interacts with the thermally stable FRM hydrofluoroelastomer surface of a fuser member of an electrostatographic apparatus to provide an interfacial barrier layer to the toner and a low surface energy film to release the toner from the surface is introduced herein.
    Type: Grant
    Filed: September 29, 1994
    Date of Patent: July 2, 1996
    Assignee: Xerox Corporation
    Inventors: Arnold W. Henry, Donald A. Seanor, George J. Heeks, Clifford O. Eddy, Che C. Chow, Santokh S. Badesha, Samuel Kaplan, David H. Pan
  • Patent number: 5532901
    Abstract: An electrostatic discharge protection device for a connector associated with an integrated circuit chip, particularly one associated with a thermal ink-jet printhead. AMOS field effect device extends along at least one edge of the connector on the chip. A bipolar transistor, parasitic to the field effect device, conducts current from the connector to ground in response to a voltage between the connector and ground in excess of a predetermined threshold. A zone of a predetermined electrical resistance is operatively disposed between the bipolar transistor and ground. The zone may substantially encircle the bonding pad of the connector to evenly distribute local incidences of high voltage. The invention enables integrated circuits to pass ESD requirements of office products, which is 15 kV by Human Body Model testing.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: July 2, 1996
    Assignee: Xerox Corporation
    Inventors: William G. Hawkins, Cathie J. Burke, Thomas E. Watrobski, Thomas A. Tellier, Sophie Vandebroek
  • Patent number: 5532793
    Abstract: An image forming apparatus includes a paper transport apparatus having a paper supply path, a paper supply tray, and an invert-transport path for alternately transporting blank copy paper sheets and single-face copy paper sheets. The invert-transport path includes an inversion path, a double-face-copy invertor apparatus, and a double-face-copy transport path member. The invert-transport path is connected via the double-face-copy transport path member to the paper supply path, and the paper supply tray is coupled to the double-face-copy transport path member. The single-face copy paper sheets are fed from the paper supply tray via the double-face-copy transport path member to the paper supply path. The paper transport apparatus further includes a control unit for performing a first operation and a second operation.
    Type: Grant
    Filed: October 19, 1994
    Date of Patent: July 2, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Yoshio Kogure
  • Patent number: 5531818
    Abstract: Disclosed is a thermal ink jet printing process which comprises (a) incorporating into a thermal ink jet printer an ink composition comprising water, a dye, and pigment particles having an average particle diameter of from about 0.001 micron to about 10 microns, said pigment particles being present in the ink in an amount of less than 0.1 percent by weight; and (b) causing droplets of the ink to be ejected in an imagewise pattern onto a recording medium by selectively heating the ink in the printer in an imagewise pattern, thereby generating images on the recording medium. The disclosed ink is capable of producing a large drop mass, high ink velocity, good directionality, and high quality images on plain papers with excellent long-term jetting stability.
    Type: Grant
    Filed: December 1, 1994
    Date of Patent: July 2, 1996
    Assignee: Xerox Corporation
    Inventors: John W.-P. Lin, W. Conrad Richards
  • Patent number: 5532849
    Abstract: A multifunction device having at least a facsimile function, a scanner and an image processing circuit is provided. The image processing circuit includes a circuit for applying a TRC correction to gray values derived at the scanner, before a halftoning circuit quantizes the gray values for printing. The TRC correction circuit includes at least two stored TRC correction functions that can be applied by the TRC correction signals. In making a call to transmit a document via the facsimile function to a called station, the exchange of signals required for establishing the facsimile connection includes identification of a preferred TRC correction function preparatory to printing at the called station printer. In accordance with the identification of a preferred TRC correction function, the image processing circuit operates on image signals derived at the scanner, to provide TRC correction of the image signals preparatory to printing at the destination printer.
    Type: Grant
    Filed: March 10, 1995
    Date of Patent: July 2, 1996
    Assignee: Xerox Corporation
    Inventors: Lloyd F. McIntyre, Reiner Eschbach
  • Patent number: 5532093
    Abstract: There is disclosed an electrostatographic imaging member comprising: (a) a supporting substrate including an electrically conductive surface; (b) a nickel containing layer comprised of nickel, oxygen, and sulfur, wherein the nickel containing layer is the sole charge blocking layer; and (c) at least one electrostatographic imaging layer.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: July 2, 1996
    Assignee: Xerox Corporation
    Inventors: Huoy-Jen Yuh, William G. Herbert, Gary J. Maier
  • Patent number: 5532103
    Abstract: An electrophotographic imaging member includes a charge generating layer, a charge transport layer and an interphase region. The interphase region includes a mixture of a charge generating material and a charge transport material, in intimate contact, and may be formed, for example, by applying a charge transport material prior to drying or curing an underlying charge generating layer to produce an interphase structure that is different from the charge generating and charge transport layers.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: July 2, 1996
    Assignee: Xerox Corporation
    Inventors: James M. Markovics, Richard H. Nealey
  • Patent number: 5533042
    Abstract: A semiconductor laser device which allows high speed correction of the position of a laser spot on an optical disk is disclosed. The semiconductor laser device comprises an active layer which oscillates a laser beam when electric current is supplied thereto, and a plurality of independent electrodes for varying the current density distribution in the active layer to vary the intensity distribution of the laser beam to be emitted from an emergent face of the semiconductor laser device. With the semiconductor laser device, by supplying electric currents individually from the plurality of independent electrodes to vary the current density distribution in the active layer, the beam spot position can be corrected within the frequency bandwidth of several tens MHz by direct modulation of the semiconductor laser device. Also a driving method for the semiconductor laser device and a tracking servo system in which the semiconductor laser device is incorporated are disclosed.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: July 2, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hideki Fukunaga, Kaoru Yasukawa, Hideo Nakayama, Nobuaki Ueki, Hiromi Otoma, Mario Fuse
  • Patent number: 5530463
    Abstract: An integral seal for priming or maintaining the nozzles or orifices of an ink jet printhead in an ink jet printer. The ink jet printhead includes a plurality of ink ejecting orifices arranged on a surface of the printhead and includes a seal integral with the surface which surrounds the ink ejecting orifices. The seal member is located within a recess formed in the surface and has a contacting surface which can be recessed from the ink ejecting orifices so that cleaning operations of the surface which, for instance, use a wiping blade, are not impeded. A capping member on a maintenance station contacts and slightly compresses the seal member to provide an airtight seal during priming/maintenance operations.
    Type: Grant
    Filed: August 25, 1994
    Date of Patent: June 25, 1996
    Assignee: Xerox Corporation
    Inventors: Peter J. Nystrom, Fredrick A. Warner, David G. Anderson
  • Patent number: 5529877
    Abstract: The present invention provides a process for the preparation of a microcapsule excellent in core substance retention and mechanical strength as well as in environmental protection, safety and sanitation which can be used in the form of powder in a short capsulization time at a low cost. The present invention also provides an electrophotographic microcapsule toner having an excellent environmental stability of chargeability and a process for the preparation thereof. A novel process for the preparation of a microcapsule is provided which comprises emulsifying an oily composition containing a low boiling solvent in the presence of a cellulose dispersion stabilizer, and then subjecting the emulsion to interfacial polymerization so that it is capsulized, characterized in that said capsulization is effected at a temperature of not lower than the gelation temperature of said cellulose dispersion stabilizer while said low boiling solvent being removed from the oily droplets.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: June 25, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshihiro Inaba, Ichiro Kawamoto
  • Patent number: 5530242
    Abstract: A fiber optic system is used in a laser ROS scanning system to generate a start of scan signal. In one embodiment, a single optical fiber is positioned at the beginning of a scan line sweep. The fiber transmits a portion of a scan beam energy to a photodetector located on a main electronics system board. The photodiode generates an output signal which is sent as an input to a high speed comparator. A second input to the comparator is a second signal derived from said first signal but having a lower amplitude. The comparator compares two wave forms and generates a sharp electrical transition at the precise time the two wave forms cross which, in preferred embodiment, occurs when the first wave form amplitude level falls to about 1/2 of maximum. The comparator output is used to initiate the SOS signal of a laser diode ROS.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: June 25, 1996
    Assignee: Xerox Corporation
    Inventor: Frank C. Genovese
  • Patent number: 5530642
    Abstract: A control system for a ROS scanner in which the aspect ratio and magnification of an image is controlled by precise, real-time control of the relative velocities of the polygon mirror and the photoreceptor. Values related to monitored measurements of polygon mirror and photoreceptor velocity are mathematically combined with a reference clock value and other factors to yield real-time control signals. The control signals operate the polygon and photoreceptor motors to obtain a desired magnification and aspect ratio of images created on the photoreceptor.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: June 25, 1996
    Assignee: Xerox Corporation
    Inventors: Robert M. Lofthus, Stuart A. Schweid, Aron Nacman, Michael S. Cianciosi
  • Patent number: 5530880
    Abstract: An information processing system for a cooperative operation in which a plurality of work stations including at least one common work station are connected to one another by means of a network.
    Type: Grant
    Filed: December 15, 1994
    Date of Patent: June 25, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Hiroshi Katsurabayashi