Patents Represented by Attorney R. Hutter

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  • Architecture for an ink jet printer with offset arrays of ejectors
    Patent number: 5598191
    Abstract: An ink-jet printer includes a printhead disposed on a reciprocating carriage. The printhead includes two sets of ejectors spaced by a predetermined pitch, in collinear linear arrays. The two sets of ejectors are offset by a partial pitch to enable interleaving of print swaths by the two sets of ejectors, in order to print at a higher resolution than the predetermined pitch would allow.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: January 28, 1997
    Assignee: Xerox Corporation
    Inventor: Gary A. Kneezel
  • System for identifying modules in a modular printing apparatus
    Patent number: 5592881
    Abstract: A system for controlling a plurality of function-specific modules in a high-volume electronic printing apparatus involves assigning a unique connection code to each physical connection between a pair of modules in the system. In order for a central control system to identify specific modules when the system is operating, each module is assigned a unique identification code which is a concatenation of the connection codes for the connections to other modules. Each module in a large system is thus identified by a unique code determined by its neighboring modules.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: January 14, 1997
    Assignee: Xerox Corporation
    Inventor: Douglas T. Rabjohns
  • Supply cartridge for an electrostatographic printer or copier
    Patent number: 5564607
    Abstract: A supply cartridge for a printer or copier retains a quantity of dry marking material. The cartridge defines a round structure on an exterior thereof, with a collar rotatable about the round structure. The round structure and the collar both define openings, and the cartridge can dispense marking material when the openings are aligned. A pad is attached to an inner surface of the collar to enhance urging of the collar against the opening of the cartridge when the cartridge is closed. The pad itself urges against the round structure at a point on the circumference of the round structure opposite the opening therein. Alternately, a protrusion can be provided in the round structure at a point opposite the opening.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: October 15, 1996
    Assignee: Xerox Corporation
    Inventors: Daniel C. Miller, Kevin L. Maltzahn, John D. Sundquist
  • Power control system for a thermal ink-jet printer
    Patent number: 5563635
    Abstract: A power control system in a thermal ink-jet printer facilitates practically instantaneous voltage changes to a heating element. A first set of selectably-actuable voltage lines is operatively connected in parallel to a first terminal of the heating element, each line having associated therewith a predetermined voltage output. A second set of selectably-actuable voltage lines is operatively connected in parallel to a second terminal of the heating element, each line having associated therewith a predetermined voltage output. One of the first set of selectably-actuable voltage lines and one of the second set of selectably-actuable voltage lines are activated as required.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: October 8, 1996
    Assignee: Xerox Corporation
    Inventors: Gary A. Kneezel, Joseph F. Stephany, Richard V. LaDonna, Thomas E. Watrobski, Michael Poleshuk, Joseph J. Wysocki, James N. Eaton
  • Apparatus for assisting manual placement of an original document on an exposure platen of copier
    Patent number: 5563685
    Abstract: A system for assisting manual placement of odd-shaped original documents on the exposure platen of a copier or scanner includes a detection device disposed on an edge of the platen. The device includes a light source emitting a light beam substantially parallel to a surface of the platen, and a photosensor adapted to detect light resulting from the reflection of the light beam by an object on the surface of the platen. A main focus direction of the light source and a main focus direction of the photosensor intersect at a predetermined position on the surface of the platen.
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: October 8, 1996
    Assignee: Xerox Corporation
    Inventor: James F. Onthank
  • Slitter for a desktop page printer
    Patent number: 5553528
    Abstract: A desktop page printer, such as suitable for printing MICR images, includes a slitter for cutting page-size prints into check-size documents as the page prints are emitted from the printing machine. The slitter can be bypassed by the installation of a side output tray which causes the paper path to be diverted from the slitter.
    Type: Grant
    Filed: March 13, 1995
    Date of Patent: September 10, 1996
    Assignee: Xerox Corporation
    Inventor: John D. Zoltner
  • Geometries for photosites in a photosensitive silicon chip
    Patent number: 5552828
    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.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: September 3, 1996
    Assignee: Xerox Corporation
    Inventor: Alain E. Perregaux
  • Fly's eye optics for a raster output scanner in an electrophotographic printer
    Patent number: 5552820
    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.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: September 3, 1996
    Assignee: Xerox Corporation
    Inventor: Frank C. Genovese
  • Xerographic printer wherein exposure and development are performed on opposite sides of the photoreceptor
    Patent number: 5552863
    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.
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: September 3, 1996
    Assignee: Xerox Corporation
    Inventor: Frank C. Genovese
  • Color sensor array and system for scanning simple color documents
    Patent number: 5550653
    Abstract: An input scanner for converting original hard-copy images into digital signals is adapted for efficient scanning of simple "business color" documents. Three linear arrays of photosensors, each linear array corresponding to one primary color, are moved relative to the original image. One linear array of photosensors operates on a full cycle and converts every single scan line of the original image into digital signals. Simultaneously, the other primary-color-sensitive linear arrays operate on half cycles and record only signals corresponding to an evenly-distributed subset of small areas of the original image.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: August 27, 1996
    Assignee: Xerox Corporation
    Inventors: Scott L. TeWinkle, Paul A. Hosier, Fred O. Hayes
  • Image processing for ink-jet printing with fast-and slow-drying inks
    Patent number: 5550569
    Abstract: A desired image based on digital data is printed on a substrate. A subset of the digital data relating to a portion of the desired image is identified, wherein pixels associated with the digital data are of a predetermined spatial relationship with pixels intended to be of a different color as the pixels associated with the digital data. The subset of digital data is caused to activate a printhead adapted to emit ink of a first type. Data not of the subset of digital data is caused to activate a printhead adapted to emit ink of a second type, the ink of the first type being adapted to dry at a faster rate than the ink of the second type.
    Type: Grant
    Filed: April 12, 1994
    Date of Patent: August 27, 1996
    Assignee: Xerox Corporation
    Inventor: Joseph D. Wright
  • Assembly for mounting semiconductor chips in a full-width-array image scanner
    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
  • Signal multiplexing system for an image sensor array
    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
  • System for controlling electrostatic voltmeters in a tri-level highlight color xerographic printer
    Patent number: 5541721
    Abstract: In a xerographic printer for tri-level highlight color imaging, two electrostatic voltmeters (ESVs) are used to interpolate the electrostatic potential at a particular location along the path of the photoreceptor belt. Anomalous ESV readings, such as would be caused by dirt interfering with the ESV itself as opposed to systemic changes in the whole apparatus, are detected by having the printer enter a "test mode" in which test patches having minimal charge are monitored by the ESVs. The low-charge test patches enable noise related directly to the ESVs to be isolated from other possible sources of noise. The noise which results from ESV malfunctioning is compensated for when the printer returns to operation.
    Type: Grant
    Filed: December 14, 1994
    Date of Patent: July 30, 1996
    Assignee: Xerox Corporation
    Inventors: Mark A. Scheuer, Daniel W. MacDonald
  • Office environment level electrostatic discharge protection
    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
  • Control system for aspect ratio and magnification of a raster output scanner
    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
  • Semiconductor chip having a dam to prevent contamination of photosensitive structures thereon
    Patent number: 5530278
    Abstract: In dicing of semiconductor chips from a wafer and mounting of the chips in an apparatus, techniques ensure the integrity of bonding pads and wire bonds in the dicing of individual chips and the connection of wire bonds to the chips. The wire bonds in the undiced chips are each connected to a probe pad disposed in an inter-chip area on the wafer, and this probe pad is used to accept probe pins which may otherwise damage the bonding pads on the chips themselves. In the dicing step, the probe pads are obliterated by the cutting blade. A polyimide dam disposes adjacent the bonding pads restricts the migration of liquid encapsulant securing the wire bonds to the bonding pads.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: June 25, 1996
    Assignee: Xerox Corporation
    Inventors: Josef E. Jedicka, Brian T. Ormond
  • Write head for a MICR reader having an adjustable field profile
    Patent number: 5530776
    Abstract: A write head magnetizes magnetic-ink characters for a MICR system. A magnetic assembly defines a first pole in a first location and an opposite pole in a second location. A first pole piece and a second pole piece, spaced by a gap therebetween, are provided, the first pole piece disposed adjacent the first location and adapted to conduct a magnetic field from the first pole to the gap. A selectably positionable member is disposed between the second location and the second pole piece, the positionable member being adapted to affect a magnetic field from the second location through the second pole piece to the gap, thereby facilitating selectable alteration of a magnetic field profile across the gap.
    Type: Grant
    Filed: January 9, 1995
    Date of Patent: June 25, 1996
    Assignee: Xerox Corporation
    Inventors: Raphael F. Bov, Jr, Jose R. Diaz
  • System for printing image data in a versatile print server
    Patent number: 5526469
    Abstract: A system for operatively connecting a source of a quantity of digital data having an image data format associated therewith, and an output device to create a print of the original image based on the digital data. A library includes a plurality of selectable format variable sets, each format variable set corresponding to an image data format. A portion of the quantity of digital data is polled for evidence relating to the presence of one image data format. A format structure operates the output device to print an image based on the digital data according to the format variables entered therein. One of the format variable sets is entered into the format structure, based on evidence in the portion of the quantity of digital data.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: June 11, 1996
    Assignee: Xerox Corporation
    Inventors: Edward E. Brindle, John C. Czudak, David B. Mensing
  • Optical element and device for providing uniform irradiance of a surface
    Patent number: 5526190
    Abstract: An optical element uniformly distributes radiant energy on a target surface, such as for discharging an area of a photoreceptor in a xerographic printer, or for applying infrared energy to dry an ink-jet image. A cylinder lens collimates light beams from a light source and directs the collimated light beams to a preselected area on the target surface. First and second refractive portions, each attached to and extending parallel to the cylinder lens, totally internally reflect light beams from the light source and direct the light beams reflected therein to the target surface.
    Type: Grant
    Filed: September 29, 1994
    Date of Patent: June 11, 1996
    Assignee: Xerox Corporation
    Inventors: Fred F. Hubble, III, James P. Martin