Patents Assigned to Xerox
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Patent number: 6546412Abstract: Temporary states are used transitionally in run-time situations and are unknown to the object database. A temporary state is created if, when an object is performing a requested event, interim work needs to be performed before the object reaches a permanent destination state. Use of a temporary state is transparent to the caller of the requested event. Within a single flow of control, an unlimited number of nested locks may be acquired. A request to unlock an object will only truly unlock the object if the unlock requester is at the highest level of locking. For recursive or embedded functions, no knowledge of the previous locking condition is necessary. Attribute-based locking provides a mechanism for allowing only certain members of the system to lock an object for writing while the object is in a predetermined state. However, any thread may obtain a read lock on an object in order to examine its attributes.Type: GrantFiled: November 7, 1997Date of Patent: April 8, 2003Assignee: Xerox CorporationInventors: Sang W. Kim, David P. Nesbitt, Steve A. Okamoto, Jennifer D. Thomas
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Patent number: 6545712Abstract: An electronic photosensitive apparatus, such as an image scanner in a digital copier, uses depleted-gate photosensors or photogates as the photosensitive elements therein. The linearity of the transfer circuit associated with each photogate or set of photogates is improved by placing a bias charge of predetermined magnitude on a phototransfer gate disposed downstream of the photogate prefatory to reading out an image signal from the photogate.Type: GrantFiled: December 17, 1998Date of Patent: April 8, 2003Assignee: Xerox CorporationInventors: Paul A. Hosier, Scott L. Tewinkle
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Patent number: 6545335Abstract: Semiconductor devices in an optoelectronic integrated circuit are electrically isolated from each other by using planar lateral oxidation to oxidize a buried semiconductor layer vertically separating the semiconductor devices.Type: GrantFiled: December 27, 1999Date of Patent: April 8, 2003Assignee: Xerox CorporationInventors: Christopher L. Chua, Philip D. Floyd, Thomas L. Paoli, Decai Sun
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Patent number: 6544321Abstract: Disclosed are pigment particles prepared by a process which comprises (a) preparing a solution of a polyalkylene oxide compound in water; (b) preparing a solution of a cationic dye in water; (c) admixing the solution containing the polyalkylene oxide compound with the solution containing the cationic dye to form a mixture; (d) adding to the mixture a solution containing a heteropolyacid in water, an alcohol, or a mixture thereof, thereby resulting in formation of pigment particles having an average particle diameter of no more than about 300 nanometers; and (e) after addition of the heteropolyacid to the mixture, neutralizing the mixture by addition of a base. Another embodiment of the present invention is directed to an ink composition comprising water and the aforementioned pigment particles.Type: GrantFiled: November 7, 2001Date of Patent: April 8, 2003Assignee: Xerox CorporationInventors: Maura A. Sweeney, Thomas W. Smith, Melvin D. Croucher
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Patent number: 6543867Abstract: A solid ink loader for feeding solid ink sticks in a phase change ink jet printer, which includes a first feed channel having a first insertion end and a first melt end for receiving ink sticks and at least one key plate for covering the at least one feed channel. The at least one key plate includes a first plate portion having a first insertion opening for admitting the solid ink sticks into the at least one feed channel, and a first plurality of viewing areas between the insertion opening and the melt end of the at least one channel.Type: GrantFiled: May 30, 2002Date of Patent: April 8, 2003Assignee: Xerox CorporationInventor: Brent R. Jones
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Patent number: 6546130Abstract: An image processing apparatus is disclosed which includes an input device that inputs image data, a color distribution recognition device that recognizes a color distribution in a color space and position information in an image space of the image data input through the input device, and a device that determines one or more color reproduction parameters of the image data based on the color distribution and position information recognized by the color distribution recognition device and a color reproduction range of an output device.Type: GrantFiled: July 14, 2000Date of Patent: April 8, 2003Assignee: Fuji Xerox Co., Ltd.Inventors: Takahide Inoue, Hitoshi Ogatsu, Ryousuke Higashikata
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Patent number: 6545646Abstract: An integrated diode detector for an imaging system is facilitated by fabricating a Schottky diode between the quarter wavelength arms of a photolithographically manufactured one-half wavelength resonator.Type: GrantFiled: July 16, 2001Date of Patent: April 8, 2003Assignee: Xerox CorporationInventor: J. F. Phillippe Marchand
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Publication number: 20030063971Abstract: A coating method for a hollow substrate including: (a) forming a seamed extended substrate unit composed of a substrate extension device and the substrate, and employing a chuck assembly to internally grip the substrate; (b) dip coating the extended substrate unit while the chuck assembly internally grips the substrate to deposit a layer first on the substrate extension device and then on the substrate; and (c) separating, subsequent to the dip coating the extended substrate unit, the substrate extension device from the substrate.Type: ApplicationFiled: November 6, 2002Publication date: April 3, 2003Applicant: Xerox CorporationInventors: Christopher A. Bonino, Mark C. Petropoulos, Michael J. Duggan, L, John Potter, Stanley J. Pietrzykowski, Shaun Selha, Mark S. Thomas, Eugene A. Swain
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Publication number: 20030063097Abstract: A process for color graphics image processing, related to detection and segmentation of sweeps, is provided. An input graphics image is transformed into a three-dimensional histogram in an appropriate color space 104 (e.g., CIELUV). Two-dimensional histograms are estimated from the three-dimensional histogram 106. The two-dimensional histograms are processed to detect and segment sweeps 108. Sweep segment information from the processing of the two-dimensional histograms is combined 110. The combined sweep segment information is used to process the input graphics image to identify and segment sweeps 112. Post-processing may be optionally and selectively used to reject false alarms (i.e., areas falsely identified as sweeps) 114.Type: ApplicationFiled: September 28, 2001Publication date: April 3, 2003Applicant: XEROX CORPORATIONInventors: Salil Prabhakar, Raja Bala, Hui Cheng, John C. Handley, Ying-wei Lin
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Publication number: 20030063275Abstract: In a color analysis system in which sheets with multiple different color printed test patches are moved relative to a color analyzing spectrophotometer, and in which fiducial marks are printed adjacent to respective test patches and optically detected by a fiducial mark detector to provide a triggering system for the respective test patch analysis, there is provided automatic diagnostic testing of the spectrophotometer and the fiducial mark triggering system, including automatically generating special test sheets, some of which may include test areas of varying density black.Type: ApplicationFiled: September 10, 2001Publication date: April 3, 2003Applicant: Xerox CorporationInventors: Fred F. Hubble, Tanya L. Love, Lalit K. Mestha, Gary W. Skinner, Dennis M. Diehl, Robert E. Grace, Eric Jackson, Yao Rong Wang
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Publication number: 20030063930Abstract: An image forming apparatus includes an image carrying body, a heating unit, a pressure unit for applying pressure, a recording medium supporting member, and a depressing/close-contacting unit. The recording medium supporting member moves in the same direction as the image carrying body moves, from a pressure position where the pressure unit applies pressure to the recording medium and the image carrying body to an exfoliation position where the recording medium is exfoliated from the image carrying body while supporting the recording medium overlapped with the image carrying body. The depressing/close-contacting unit sandwiches and depresses the recording-medium supporting member and the image carrying body in a middle position between the pressure position and the exfoliation position to closely contact the recording medium with the image carrying body.Type: ApplicationFiled: September 9, 2002Publication date: April 3, 2003Applicant: FUJI XEROX CO., LTD.Inventors: Yutaka Kiuchi, Tohru Inoue, Yuichi Fukuda
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Publication number: 20030063521Abstract: The present invention relates to a high intensity blending apparatus, particularly for blending operations designed to cause additive materials to become affixed to the surface of base particles. More particularly, the proposed invention relates to an improved blending tool for producing surface modifications to electrophotographic and related toner particles. The tool comprises a shank having riser members at each end, such risers being angled to the axis of the shank between 10 and 16 degrees.Type: ApplicationFiled: August 31, 2001Publication date: April 3, 2003Applicant: Xerox CorporationInventors: Samir Kumar, Juan A. Morales-Tirado, D. Paul Casalmir, Scott M. Silence, Ying S. Molisani, James M. Proper, Jerry G. Owens, Geraldine Baer
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Publication number: 20030063183Abstract: An intensity correction circuit adjusts the intensity of the pixel data which modulates the light beam of a raster output scanner to compensate for facet to facet reflectivity intensity differences of the rotating polygon mirror used to scan the modulated light beam on a photosensitive medium.Type: ApplicationFiled: October 1, 2001Publication date: April 3, 2003Applicant: Xerox CorporationInventors: Vincent W. AuYeung, Pancy Auyeung, Khuay Cam
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Publication number: 20030063308Abstract: The present invention relates to the remote activation of a system diagnostic for a customer. The system so activated is resident at the customer location. The activation is initiated at a location remote from the customer location. The activation of the diagnostic may also include correction and optimization of the system if it is determined that it is needed. Any such initiated system activity would most typically be performed after hours. The system then communicates locally to the customer the diagnostic results as found, as well as any other action taken.Type: ApplicationFiled: October 1, 2001Publication date: April 3, 2003Applicant: Xerox CorporationInventor: Stephen J. Nichols
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Publication number: 20030063335Abstract: As the individual pages of a book having a gutter and outside edge margins and being held at least partially open are being automatically sequentially turned over, in coordination therewith a flattening force is applied to the unimaged gutter margin areas of the book for flattening the pages after they have been at least substantially turned over, and unimaged outside edge margins of the book are clamped by automatic clamping members in coordination therewith, for appropriate page viewing and/or imaging. The flattening force may be applied with a V shaped reciprocally movable member, which may also be partially self-centering in the book gutter, and may also open to push outwardly on the then-open pages, as applied.Type: ApplicationFiled: September 28, 2001Publication date: April 3, 2003Applicant: Xerox CorporationInventors: Barry P. Mandel, William R. Burger, Thomas E. Sollitt, Scott Miller, Mark L. Leveto
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Publication number: 20030064310Abstract: The present invention relates to a toner and process for making the improved toner. The improved toner comprises a toner resin comprising: at least one colorant; (b) at least one toner resin mixed with the colorant and formed into combined colorant and resin particles having an average size less than 15 microns; and (c) surface additive particles wherein the surface additives are adhered to the colorant and toner resin by an impaction process in a quantity greater than three (3) percent of the combined weight of resin and colorant in the toner.Type: ApplicationFiled: August 31, 2001Publication date: April 3, 2003Applicant: Xerox CorporationInventors: Samir Kumar, Juan A. Morales-Tirado, D. Paul Casalmir, Scott M. Silence, Ying S. Molisani, James M. Proper, Paul L. Jacobs, Geraldine Baer
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Publication number: 20030063803Abstract: A method and system for image processing, in conjunction with classification of images between natural pictures and synthetic graphics, using SGLD texture (e.g., variance, bias, skewness, and fitness), color discreteness (e.g., R_L, R_U, and R_V normalized histograms), or edge features (e.g., pixels per detected edge, horizontal edges, and vertical edges) is provided. In another embodiment, a picture/graphics classifier using combinations of SGLD texture, color discreteness, and edge features is provided. In still another embodiment, a “soft” image classifier using combinations of two (2) or more SGLD texture, color discreteness, and edge features is provided. The “soft” classifier uses image features to classify areas of an input image in picture, graphics, or fuzzy classes.Type: ApplicationFiled: September 28, 2001Publication date: April 3, 2003Applicant: Xerox CorporationInventors: Ying-Wei Lin, Stuart A. Schweid, Jeng-Nan Shiau, Raja Bala, Zhigang Fan
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Publication number: 20030063076Abstract: The present invention is for providing an image display device capable of preventing deterioration of display sharpness and contrast, and capable of improving display quality. An image display medium has a display substrate, having a first electrode, disposed on an image display surface side, a rear substrate having a plurality of second electrodes facing the display substrate, and two kinds of particle groups having different colors and charge characteristics sealed between the display substrate and the rear substrate movably between the first electrode and the second electrodes by an electric field. Before application of a display drive voltage for executing the image display, a voltage is applied to the image display medium by a voltage applying component so as to generate an electric field for moving the particle groups between the second electrodes to adjacent the second electrodes.Type: ApplicationFiled: April 18, 2002Publication date: April 3, 2003Applicant: FUJI XEROX CO., LTD.Inventors: Yoshinori Machida, Takeshi Matsunaga, Kiyoshi Shigehiro, Yoshiro Yamaguchi, Yasufumi Suwabe, Motohiko Sakamaki
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Publication number: 20030064166Abstract: An apparatus for coating a photoreceptor substrate, such as a photoreceptor belt or a photoreceptor drum, consists of at least one photoreceptor coating fluid reservoir or diptank. The diptank defines an inlet at one end and a conduit with an orifice at the other end. The conduit includes at least one porous element such as a grid, screen or mesh arranged for suspending a plurality of layers of non-contaminating rounded objects, such as stainless steel or glass beads, in the bottom of the conduit. Photoreceptor coating solution supplied to the inlet is thereby forced to flow through the plurality of layers of beads prior to coating a photoreceptor substrate that is inserted through the orifice. As a result, the uniformity of the coating solution is improved as it coats the photoreceptor substrate, thereby reducing coating defects in the finished photoreceptor belt or drum.Type: ApplicationFiled: November 1, 2002Publication date: April 3, 2003Applicant: Xerox CorporationInventors: Steven J. Grammatica, Eugene A. Swain, Christopher R. Fridd, Kathryn T. Lalone
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Publication number: 20030063171Abstract: In an ink jet recording head, an ink pool has a main flow path communicating with an ink supply port and a plurality of branch flow paths branching from the main flow path. Each ejector has a pressure chamber, a pressure generating unit and a nozzle. The pressure chamber communicates with the corresponding one of the branch flow paths. The pressure generating unit generates a pressure wave in ink charged into the pressure chamber. The nozzle ejects the ink from the pressure chamber compressed by the pressure wave. At least one wall surface forming each of the branch flow paths is formed of a damper member elastically deformable in accordance with the change of pressure in the branch flow path.Type: ApplicationFiled: August 29, 2002Publication date: April 3, 2003Applicant: Fuji Xerox Co., Ltd.Inventors: Yasuhiro Otsuka, Kazuhiko Hayashi, Toshinori Ishiyama, Masakazu Okuda