Patents Represented by Attorney R. Hutter

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  • Advanced administration functions for copiers and printers on a network
    Patent number: 6903840
    Abstract: In an administrative program controlling a plurality of printers and copiers, an administrator is provided with a matrix whereby different billing requirements can be associated with different discrete functions, such as printing, scanning, faxing, and finishing, within a single machine. The administrator is provided with options to control the behavior of the machine when required billing codes are not entered,such as holding image data relating to a requested job in a machine until the required billing codes have been entered.
    Type: Grant
    Filed: October 24, 2000
    Date of Patent: June 7, 2005
    Assignee: Xerox Corporation
    Inventors: Marina Maymin, David L. Salgado, Therese F. Leni
  • Power control for a xerographic fusing apparatus
    Patent number: 6901226
    Abstract: In a xerographic printer including a fuser having a heating element, a first predetermined power level is applied to the heating element. The voltage associated with the heating element is measured, yielding an output code which is applied to a look-up table. The output of the look-up table relates to power to be applied to the heating element in a time interval T going forward: the output sets forth what power level is to be applied to the heating element for a smaller interval t within interval T, and what power level is to be applied to the heating element for the balance of the interval T.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: May 31, 2005
    Assignee: Xerox Corporation
    Inventor: Franciscus Gerardus Johannes Claassen
  • Sealing device useful in remanufacturing a xerographic photoreceptor module
    Patent number: 6895198
    Abstract: In a module for use in a xerographic printer, a substantially single-piece device includes thereon a cleaning blade, seal flap, and side seals for engaging a photoreceptor. The device can be easily replaced when the module is remanufactured.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: May 17, 2005
    Assignee: Xerox Corporation
    Inventors: Allen J. Thompson, Willie J. Cottrell, Jr., Clifford W. Imes, IV, Charles H. Tabb
  • Xerographic development system where a gap between a donor member and a photoreceptor is estimated
    Patent number: 6895194
    Abstract: In a hybrid jumping (HJD) or hybrid scavengeless (HSD) development station used in xerography, a control system avoids arcing conditions in a gap between a donor member and an image receptor. In a set-up operation, a series of test patches are produced while incrementing the AC amplitude in the gap. A change in reflectivity of the patches as a function of the AC amplitude in the gap is measured and the actual width of the gap is thus estimated. An accurate estimate of the gap width can then be used in a control algorithm.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: May 17, 2005
    Assignee: Xerox Corporation
    Inventors: Song-feng Mo, Wendy K. Apton, Stephen F. Randall, Patrick J. Walker
  • Sheet folding apparatus
    Patent number: 6881181
    Abstract: A sheet folding apparatus, which may be used in conjunction with a printer or copier, includes a set of rollers forming a buckle zone, in which sheets are caused to buckle for creasing by a folding nip formed by the rollers. A blade is selectably positionable in and out of the buckle zone. When the blade is positioned in the buckle zone, any previously-folded portion of the sheet (such as in C-folding of the sheet) is prevented from being drawn away from the folding nip.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: April 19, 2005
    Assignee: Xerox Corporation
    Inventors: Robert H. Brown, Jeff Farrell, Stephen Abellera
  • Xerographic printing system with magnetic seal between development and transfer
    Patent number: 6876829
    Abstract: In a xerographic development apparatus using a magnetic brush formed from magnetic carrier particles, a magnetic strip disposed downstream of the development zone along the direction of motion of the photoreceptor retains a separate, small brush of carrier particles near the photoreceptor. The brush acts as a barrier separating a flow of “dirty” air (laden with airborne toner particles) upstream of the strip, and a flow of clean air downstream of the strip.
    Type: Grant
    Filed: April 29, 2003
    Date of Patent: April 5, 2005
    Assignee: Xerox Corporation
    Inventor: Roger D. Masham
  • Combined multiplexing and offset correction for an image sensor array
    Patent number: 6853402
    Abstract: A photosensitive device, such as would be found in a digital scanner or camera, includes at least two sets of photosensors, the video signals from which are multiplexed together. While the two video paths are separate, before the multiplexing step, an offset correction process is carried out on each video path. After multiplexing, a final offset correction process is carried out to the combined signals, to remove offsets associated with the combined video path.
    Type: Grant
    Filed: January 30, 2001
    Date of Patent: February 8, 2005
    Assignee: Xerox Corporation
    Inventors: Paul A. Hosier, Scott L. TeWinkle
  • Platen cover positioning system for an input scanner or copier
    Patent number: 6850730
    Abstract: In a copier or input scanner wherein original documents are manually placed on a platen for scanning, when a platen cover is lowered over the document and approaches a closed position, a control system initiates a scanning operation while locking the platen cover in the closed position. After the scanning operation is completed, the platen cover is automatically pushed into an open position as a visual cue to the user that a new document may be scanned. The system facilitates manual scanning of odd-shaped documents, such as successive pages of bound books.
    Type: Grant
    Filed: May 22, 2003
    Date of Patent: February 1, 2005
    Assignee: Xerox Corporation
    Inventor: John N. Adams
  • Photosensitive apparatus wherein an initial charge on a photodiode is sampled and substracted during readout
    Patent number: 6847400
    Abstract: In a photosensitive apparatus having photodiodes, such as a photosensor chip used in digital office equipment, a “fat zero” initial bias is injected on the photodiode. With every cycle of operation, a first fat zero is placed on the photodiode and then sampled. Then, a second fat zero is placed on the photodiode just before the integration of a light signal from an image being recorded. The light signal plus the second fat zero is transferred out of the photodiode and the sampled signal is subtracted therefrom, leaving only the light signal. The system obviates both fixed-pattern and some thermal noise within the apparatus.
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: January 25, 2005
    Assignee: Xerox Corporation
    Inventors: Paul A. Hosier, Scott L. TeWinkle
  • Digital printing apparatus with remotely selectable operating speeds and features
    Patent number: 6844937
    Abstract: A digital printing apparatus is capable of a plurality of selectable output speeds, by varying motor speed or pitch configuration. A user using the apparatus at a basic speed can request a temporary increase in speed of his printing apparatus from a vendor who controls aspects of the printing apparatus over a network. The temporary speed increase can be pre-scheduled, such as to occur one day per week. The user can be charged at different per-print rates depending on the selected speed.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: January 18, 2005
    Assignee: Xerox Corporation
    Inventors: Neil J. Dempsey, Thomas E. Bitter, Joseph H. Lang, David K. Young
  • Digital printing system which retains recent files for rapid output
    Patent number: 6819445
    Abstract: A printing system, available to a population of users on a network, checks whether files in recently-received print jobs are identical to files which have been previously decomposed or rasterized within a particular time frame prior to the submission of the job. If it is detected that a file to be printed in a recently-submitted job is identical to a file which has already been rasterized with the rasterized image available in memory, the system substitutes the already-rasterized file for the file submitted with the job, thus saving the time and resources for rasterizing the file in the recently-submitted job.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: November 16, 2004
    Assignee: Xerox Corporation
    Inventors: Duncan I. Stevenson, Alison M. Howse, Stephen J. Abbott
  • Booklet maker with contact member
    Patent number: 6799759
    Abstract: In a booklet maker, as would be found in conjunction with a copier or printer, sheets to be folded and stapled into a booklet are accumulated in a slot. At the bottom of the slot, a selectably extendable contact member presses an accumulating set of sheets against a sidewall of the slot following the entry of each new sheet into the slot. The contact member decreases curling and fluffing of sheets within the slot, which can cause imprecisions in registering, stapling, or creasing of the sheets as they are formed into a booklet.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: October 5, 2004
    Assignee: Xerox Corporation
    Inventors: Joseph M. McNamara, Yanmin Mao
  • Error diffusion for digital printing
    Patent number: 6751358
    Abstract: A system for simulating grayscales in a digital printer, such as an ink-jet printer, exploits a modified error diffusion technique. When a datum for a particular pixel in an image is 0, the datum is substituted with a low-level artificial datum such as 4 on a scale from 0 to 255. The addition of the artificial datum in the error diffusion algorithm avoids artifacts caused by the presence of large number of zeros in the error diffusion algorithm.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: June 15, 2004
    Assignee: Xerox Corporation
    Inventors: David A. Mantell, James B. Kuwik
  • Document communication systems for use in automobiles
    Patent number: 6748306
    Abstract: A document device, including an input scanner and printer, is installed in an automobile. The document device can transmit and receive image data wirelessly, and further interacts with a Global Positioning System (GPS) device within the automobile to determine the location of the automobile. Aspects of documents based on received image data, and the destinations of transmitted image data, can be made dependent on the location of the automobile at any time. Received image data is retained in memory and printed out when the car is in a predetermined condition, such as being turned on.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: June 8, 2004
    Assignee: Xerox Corporation
    Inventor: Robert F. Lipowicz
  • Blade seal for a xerographic module
    Patent number: 6744999
    Abstract: In a xerographic printing apparatus, a blade is used to clean the surface of a rotating photoreceptor. At an end of the blade is disposed a flexible sealing member. The sealing member includes a bulk portion, one part of which contacts the surface of the photoreceptor and another part of which is attached to a stationary surface. Extending from the bulk portion is a tab which defines a diagonal edge. A portion of the diagonal edge contacts a surface of the blade.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: June 1, 2004
    Assignee: Xerox Corporation
    Inventors: Peter J. M. Bloemen, Pierre W. A. Hendriks, Ton Wijnen
  • System for compensating for chip-to-chip gap widths in a multi-chip photosensitive scanning array
    Patent number: 6707022
    Abstract: In a photosensitive scanning apparatus, in which a plurality of chips are aligned to form a single linear array of photosensors, gaps of unknown width between photosensors on adjacent chips may have an effect on resulting image quality. A set of simple strategies can be used to overcome the problem. In a first strategy, for each chip, interpolation of output values of the photosensors is used to in effect displace the outputs of the photosensors by a predetermined amount toward a gap; within constraints, the predetermined displacement can be used without actual measurement of any gap width. In a second strategy, an interpolated output of a theoretical “phantom photosensor” disposed toward the gap is added to the output stream from each chip.
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: March 16, 2004
    Assignee: Xerox Corporation
    Inventor: Alain E. Perregaux
  • Paper input guide for a transfer zone in a xerographic printing apparatus
    Patent number: 6687479
    Abstract: A printing apparatus includes a guide member for directing sheets toward a transfer zone. The guide member defines a set of ribs which hold the sheets above the main surface of the guide member. Thus, any stray marking material which lands on the guide member is relatively unlikely to contact a sheet moving over the guide member.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: February 3, 2004
    Assignee: Xerox Corporation
    Inventors: Gerardo Leute, John W. D. Cooper, Ian Brailsford, Stan Alan Spencer, Roger D. Masham, Derek J. Milton, Robert G. Hall, Roderick A. Cooley, John M. Wysocky, Charles H. Tabb, Jorge A. Alvarez, Alexander C. Bisland, Peter A. Mayfield, Clifford W. Imes, IV, Peter J. M. Bloemen, Michael B. Thomson, Krzysztof J. Less, David G. Anderson
  • CMOS image sensor array having charge spillover protection for photodiodes
    Patent number: 6683646
    Abstract: A CMOS-based photosensor array, having a plurality of photodiodes therein, includes a spillover protection circuit associated with each photodiode. The spillover protection circuit causes a potential to be applied to a photodiode in response to a charge spillover or “blooming” condition. The spillover protection device is momentarily disabled whenever a bias charge is injected onto the photodiode by the transfer circuit. Also, a reference voltage applied to the gate of a transistor forming the spillover protection device is higher than a threshold voltage of the transistor but is lower than a sum of the threshold voltage and a maximum light-intensity signal from the photodiode.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: January 27, 2004
    Assignee: Xerox Corporation
    Inventors: Paul A. Hosier, Scott L. Tewinkle, Jagdish C. Tandon
  • Simultaneous voice and data communication for diagnostic procedures in a printing or copying machine
    Patent number: 6665085
    Abstract: A system for conveying diagnostic data from a machine, such as a digital copier or printer, to a remote specialist allows simultaneous transfer of diagnostic data and live voice data through the same communication channel. A distinct sequence of steps between the computer in the machine and the specialist's computer minimizes the chance of time-wasting errors in establishing communication.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: December 16, 2003
    Assignee: Xerox Corporation
    Inventors: Carl W. Edmunds, Daniel Auman, Kevin R. Mathers, Craig S. Lippolis, Arturo M. Lorenzo, Carol-Lynn Goldstein
  • Xerographic fusing apparatus with input sheet guide
    Patent number: 6661989
    Abstract: In a fusing apparatus, such as used in xerography, two rolls form a nip therebetween. A guide member is positionable to direct a sheet approaching the nip to enter the nip at an angle so that an arc or buckle is created in the sheet between a marking station and the nip. The arc or buckle is helpful in avoiding the transfer of mechanical energy from the fusing apparatus to the marking station. As the trailing edge of the sheet exits the marking station, the guide member is positioned to straighten the sheet.
    Type: Grant
    Filed: April 9, 2002
    Date of Patent: December 9, 2003
    Assignee: Xerox Corporation
    Inventors: Ian Pitts, Stan Alan Spencer