Patents Assigned to Xerox
  • Patent number: 5922117
    Abstract: An ink composition comprised of (1) a liquid alcohol vehicle, (2) a solid alcohol compound, (3) a quaternary compound, (4) a lightfastness UV absorber, (5) a lightfastness antioxidant, and (6) a colorant.
    Type: Grant
    Filed: September 23, 1997
    Date of Patent: July 13, 1999
    Assignee: Xerox Corporation
    Inventors: Shadi L. Malhotra, Danielle C. Boils
  • Patent number: 5923923
    Abstract: An image forming apparatus includes a control unit for executing a control operation in which the photoreceptor drum is not to directly contacted with a divided holding region surface on the transfer belt onto which a transfer sheet fed again by the trayless device is held.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: July 13, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Mikio Kobayashi, Ryoichi Tsuruoka
  • Patent number: 5923921
    Abstract: An apparatus for mechanically assisting the transfer of an image from an image bearing member onto a substrate. The apparatus includes a transfer assist blade that forces a substrate toward an image bearing member, a motor, a mechanical assembly for coupling the motor to the transfer assist blade such that motor operation changes the transfer assist blade force, and a controller that controls the motor operation. The controller might receive inputs from a substrate sensor, an operator control panel, and/or a service adjustment. The controller might use those inputs to control the motor operation, and thus the transfer force. Alternatively, the controller might control the transfer force as a result of the operation of the overall machine, such as by changing the transfer force during duplex printing or during the transfer of various color images.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: July 13, 1999
    Assignee: Xerox Corporation
    Inventors: William M. OuYang, David P. Cropek, Donald L. Miller, Stephanie P. Burton, Julie A. Lapp, Eugene L. Smith
  • Patent number: 5921540
    Abstract: A vacuum corrugation feeder employs a vacuum feedhead working in conjunction with an air knife to feed sheets from the top or bottom of a stack. A retractable corrugator is included in the vacuum feedhead which prevents smearing of coated sheets due to relative motion between sheet surfaces and the corrugator.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: July 13, 1999
    Assignee: Xerox Corporation
    Inventors: Thomas Acquaviva, William Brant
  • Patent number: 5923323
    Abstract: A computer controlled display system for defining flow regions. A flow region enables a user to view long lists of data items on the work surface of a graphical display system. In a flow region, a rectangular region typically the size of the viewable work surface area, is organized into columnar columns. The items in the long list are mapped to the columnar columns. As items are added to or deleted from the list, the items contained within the columnar columns may "flow" to other columns. In this organization the items in the top of the list are in the first column and the list is displayed in columnar fashion from left to right. Thus, all items in the list may be displayed in the viewable work surface area.
    Type: Grant
    Filed: June 26, 1996
    Date of Patent: July 13, 1999
    Assignee: Xerox Corporation
    Inventors: Patrick Chiu, Thomas P. Moran, William J. van Melle
  • Patent number: 5923938
    Abstract: The present invention prevents a recording sheet from generating wrinkles, by expanding means having an inverted crown shape pressing roll or a special sheet shape discharge restraining baffle, at the nip portion, expanding the recording sheet toward the right and left sides from the central portion in the sheet moving direction, temporal adsorbing means having discharge-output control means for an adsorbing charger or a contact pressure adjustment mechanism of the pressing roll temporarily adsorbing, in the nip portion, the leading end of the recording sheet to the dielectric film with small adsorbing force, correction means having an outer roll and an inner roll or the like disposed between the recording-sheet adsorbing apparatus and a portion for electrostatically transferring a toner image disposed downstream from the recording-sheet adsorbing apparatus applying pressure to the dielectric film to which the recording sheet has been adsorbed so that a state of adsorption of the recording sheet before a firs
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: July 13, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshihiro Enomoto, Takashi Kawabata, Yukio Hayashi, Nobuo Hyakutake
  • Patent number: 5923783
    Abstract: The present invention aims to execute effective compression even in the case where inputted image information has the bit number smaller than that of a pixel value, such as a tag, and besides in the case where the entropy increases if a prediction error obtained by subtraction of a value of a neighboring pixel from that of an object pixel is used for calculation of the entropy.According to the present invention, in an image encoding apparatus, the inputted image information is made to be packed image data of a fixed length and provided to a couple of predicting elements and a couple of prediction error calculating elements. The packed image data and prediction errors outputted from the couple of prediction error calculating elements are provided to a prediction error selecting element and one of the data and prediction errors having a smallest entropy is selected.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: July 13, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kenichi Kawauchi, Taro Yokose, Shunichi Kimura
  • Patent number: 5922897
    Abstract: A process for the preparation of surfactants is described comprising reacting a phosphorus acid ester of the following Formula (IV) ##STR1## wherein R.sup.t is aryl, R.sup.2 is alkyl or aryl, with a hydrophilic polyoxyalkylene of the following Formulas (VIII), or (IX) ##STR2## wherein R.sup.3 is alkyl and A is a hydrophilic polyoxyalkylene chain, and which reaction results in an intermediate compound Formulas (XI), (XII), or (XIII); ##STR3## reacting the intermediate compound selected from the group consisting of Formulas (XI) through (XIII), with a hydroxylic compound R.sup.1 -OH (X) to yield surfactant precursors comprised of Formulas (V), (VI), and (VII), respectively: ##STR4## and, oxidizing said phosphorus ester-linked surfactant precursors selected from the group consisting of Formulas (V), (VI) and (VII), with an oxidizing agent to produce the surfactants.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: July 13, 1999
    Assignee: Xerox Corporation
    Inventors: Nan-Xing Hu, H. Bruce Goodbrand
  • Patent number: 5922268
    Abstract: An electric type paper display having memory properties, rapid response times and multi-optical property display with an image of high quality is made. Each display element is wholly in contact with liquid in a cavity and the surface of each display element has a portion with a most positive charge. When an electrical field is applied from the outside, each display element is turned correspondingly to the direction of the electric field and, then electrically migrated through the liquid and attached to the inner surface of the cavity. Among multiple display surfaces of each display element an optical property is selected according to an image signal and is visible through a transparent support to an observer. Afterwards, the attached state of each display element, i.e.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: July 13, 1999
    Assignee: Xerox Corporation
    Inventor: Nicholas K. Sheridon
  • Patent number: 5923347
    Abstract: An improved method and apparatus is provided for cleaning an ink jet printhead following a print operation. A source of pressure is applied to the printhead nozzle face via a resilient sealing cap member. The printhead manifold is connected to a reservoir which is filled with cleaning fluid. The cleaning fluid is introduced into the printhead interior. The pressure source is activated for short time periods and at a low pressure forces air into the interior of the printhead. This creates an agitation of the cleaning mixture and a bubbling effect which causes residual ink within the printhead to be mixed with the cleaning fluid and carried through the ink manifold back into the ink tank. The operation can be repeated until all of the residual ink is purged from the printhead interior.
    Type: Grant
    Filed: January 24, 1997
    Date of Patent: July 13, 1999
    Assignee: Xerox Corporation
    Inventor: Thomas F. Wade
  • Patent number: 5922440
    Abstract: A polyimide film component useful in intermediate transfer, bias transfer, and transfix applications, the polyimide film having electrically conductive doped metal oxide fillers dispersed therein, the polyimide film having a surface resistivity of from about 10.sup.6 to about 10.sup.14 ohm/sq, and optionally provided on the polyimide film an outer layer, or in the following order both a conformable intermediate layer and an outer release layer.
    Type: Grant
    Filed: January 8, 1998
    Date of Patent: July 13, 1999
    Assignee: Xerox Corporation
    Inventors: Edward L. Schlueter, Jr., Joseph Mammino, Gerald M. Fletcher, Donald S. Sypula, James F. Smith, Lucille M. Sharf, Robert M. Ferguson
  • Patent number: 5923490
    Abstract: A searching and block access method on a digitally recorded continuous web media. The method enables a digitally recorded tape to be randomly positioned to access a specific requested data block. This method does not rely on scanning the information recorded on the tape to locate a requested data block. The tape is shuttled at high speeds to randomly requested locations. Tape positioning and control is accomplished by profiling the motion required to position the tape at the requested block relative to any current tape position. A tape directory of contents and tape position is recorded on the tape and cached within the drive controller. The cached version of the tape directory is used for random accesses. The random access ability enables the tape implementation to perform disk storage emulation.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: July 13, 1999
    Assignee: Xerox Corporation
    Inventors: Gerald J. Joyce, James V. Schimandle, Dennis C. Stark
  • Patent number: 5922501
    Abstract: A process for the preparation of toner comprising blending an aqueous colorant dispersion and a latex resin emulsion, and which latex resin is generated from a dimeric acrylic acid, an oligomer acrylic acid, or mixtures thereof and a monomer; heating the resulting mixture at a temperature about equal, or below about the glass transition temperature (Tg) of the latex resin to form aggregates; heating the resulting aggregates at a temperature about equal to, or above about the Tg of the latex resin to effect coalescence and fusing of the aggregates; and optionally isolating the toner product, washing, and drying.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: July 13, 1999
    Assignee: Xerox Corporation
    Inventors: Chieh-Min Cheng, Grazyna E. Kmiecik-Lawrynowicz, Karen L. LaMora, Casimir J. Mytych
  • Patent number: 5923826
    Abstract: A printing system with a digital reproduction system communicating with a remote document processing station by way of a print server is provided. The printing system includes a first queue of first jobs to be executed with the digital reproduction system maintained at the print server and a second queue of second jobs to be executed with the digital reproduction system maintained at the digital reproduction system. The printing system further includes a queue process communicating with both the first and second queues for forming a composite queue to reflect an order in which the first and second jobs of the first queue and the second queues are to be executed with the digital reproduction system.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: July 13, 1999
    Assignee: Xerox Corporation
    Inventors: Marilyn S. Grzenda, Holly S. Beck, Stephen F. Skrainar, John W. Daughton, David L. Salgado, Cynthia A. Smith
  • Patent number: 5923940
    Abstract: An apparatus and printing machine that contain a cleaner brush with long sweeper fibers orientated along the overall width of the brush, and having a greater length than the majority of fibers of the brush to remove the particles that adhere to the cleaner housing and thus, prevent toner droppings.
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: July 13, 1999
    Assignee: Xerox Corporation
    Inventors: Steven W. Baldwin, Dennis G. Gerbasi, Thomas A. Prentiss, David R. Stookey, Bruce E. Thayer, Ralph J. Weber, Matthew P. Daniels, James J. Teich, Moritz P. Wagner
  • Patent number: 5924119
    Abstract: A shared memory multiprocessor having a packet switched bus for transferring data between a plurality processors, I/O devices, cache memories and main memory employs a bus protocol which permits multiple copies of data to be updated under the control of different processors while still ensuring that all processors and all I/O devices have access to consistent values for all data at all times.
    Type: Grant
    Filed: January 27, 1994
    Date of Patent: July 13, 1999
    Assignee: Xerox Corporation
    Inventors: Pradeep S. Sindhu, Jean-Marc Frailong, Jean A. Gastinel
  • Patent number: 5923821
    Abstract: A system for trapping of a dark image object on a lighter colored background is disclosed. In a system using a page description language including overprint operators, black image areas (such as text, lines, graphic objects and the like) can be set to overprint colored background areas in a manner that eliminates rendered image defects including page-colored "halo" effect that can occur when the cutout background area underlying the black object is misregistered with the black object that was intended to cover the cutout area. In other systems, the present invention may be employed as a disabling of the undercolor removal system of a colored area that would otherwise be present under the black object. Systems using black plus at least one other toners or ink color (such as cyan, magenta and/or yellow or many other colors) can usefully employ the system of the present invention.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: July 13, 1999
    Assignee: Xerox Corporation
    Inventors: David Birnbaum, Tse-kee Chan, Bradley W. Smith, Fritz F. Ebner, Stephen F. Linder
  • Patent number: 5919861
    Abstract: A process for the preparation of branched thermoplastic resins comprising: heating a mixture of an unsaturated resin, a free radical initiator, and a stable free radical agent; adding to the heated mixture at least on polymerizable monomer; and cooling the mixture, wherein the resulting product is a branched thermoplastic resin with arms or branches comprised of polymerized monomer with substantially uniform length and narrow polydispersity.
    Type: Grant
    Filed: July 16, 1997
    Date of Patent: July 6, 1999
    Assignee: Xerox Corporation
    Inventors: Peter M. Kazmaier, Karen A. Moffat, Marko D. Saban, Richard P. N. Veregin, Michael K. Georges, Gordon K. Hamer
  • Patent number: 5919409
    Abstract: A method of fabricating a multisegmented ball for an electrical twisting ball display device, which is made up of spheroidal balls rotatably disposed in an elastomer substrate. The ball is composed of segments arrayed substantially parallel to one another, each segment being adjacent to at least one other segment and to no more than two other segments, adjacent segments being adjoined to one another at substantially planar interfaces. The method for fabricating the multisegmented spheroidal balls comprises the steps of first providing a multiplicity of liquid flows, each liquid flow having an associated flow rate, each liquid flow being a flow of a hardenable liquid material associated with an optical modulation characteristic. The multiplicity of flows are then merged into a combined liquid flow where each one of the plurality of liquid flows is joined to at least one other of the plurality of liquid flows at a planar interface.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: July 6, 1999
    Assignee: Xerox Corporation
    Inventor: Nicholas K. Sheridon
  • Patent number: 5920766
    Abstract: A red laser structure has an inverted or p-side down orientation. The red laser structure is inverted and wafer fused to a blue laser structure to form a red/blue monolithic integrated laser structure. The top semiconductor layer of the inverted red laser structure is a GaInP fusion bonding layer which will be wafer fused to the top semiconductor layer of the blue laser structure which is a GaN cladding/contact layer.
    Type: Grant
    Filed: January 7, 1998
    Date of Patent: July 6, 1999
    Assignee: Xerox Corporation
    Inventor: Philip D. Floyd