Patents by Inventor William Paul Cook

William Paul Cook has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20180329337
    Abstract: A method for controlling transfer of black and color toned images during duplex printing. The method comprises determining whether or not a first image for printing on a back side of a media sheet is a color image, upon determining that the first image is a color image, ensuring each respective color transfer roll or color PC drum is in its respective engaged position, rotating the black and color PC drums, and setting the color flag to true, and printing the first image in color on the back side of the media sheet and upon determining that the first image is not a color image, ensuring each respective color transfer roll or color PC drum is in its respective disengaged position, rotating the black PC drum, setting the color flag to false, and printing the first image in black on the back side of the media sheet.
    Type: Application
    Filed: May 11, 2017
    Publication date: November 15, 2018
    Inventor: WILLIAM PAUL COOK
  • Patent number: 10082757
    Abstract: A method for controlling transfer of black and color toned images during combined simplex and duplex printing in an electrophotographic imaging device having either a plurality of movable color photoconductive drums or a plurality of moveable color transfer rolls.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: September 25, 2018
    Assignee: Lexmark International, Inc.
    Inventor: William Paul Cook
  • Patent number: 9977376
    Abstract: A method for controlling transfer of black color toned images during simplex printing.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: May 22, 2018
    Assignee: Lexmark International, Inc.
    Inventor: William Paul Cook
  • Patent number: 9575453
    Abstract: A media path assembly in an imaging device includes a media guide positioned adjacent and transverse to a media path between a first and a second nip, and having a surface forming a bubble chamber across the media path. A bubble sensor and a narrow media sensor are positioned adjacent to the bubble chamber transverse to the media path and aligned with each other. The bubble sensor is operative to indicate formation in the bubble chamber of a bubble in a media sheet exiting the first nip. The narrow media sensor is operative to indicate media size of the media sheet and, when the media sheet is wide media, provide a balancing force to the media sheet relative to a force applied by the bubble sensor to the media sheet so that a leading edge of the media sheet substantially aligns with the second nip when entering the second nip.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: February 21, 2017
    Assignee: Lexmark International, Inc.
    Inventors: Richard Gordon Boyatt, III, Jichang Cao, William Paul Cook, Edward Lawrence Kiely
  • Patent number: 8737875
    Abstract: The present application is directed to methods and devices for moving a cartridge between engaged and disengaged positions in an image forming device. The image forming device may include a bias control arm movable between first and second positions. When the bias control arm is in one of the first and second positions, a biasing force on the cartridge is reduced and the cartridge moves to the disengaged position. When the bias control arm is in the other of the first and second positions, a biasing force on the cartridge is increased and the cartridge is moved to the engaged position. In one embodiment, the bias control arm moves in a first direction, and the cartridge moves in a second direction different than the first direction.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: May 27, 2014
    Assignee: Lexmark International, Inc.
    Inventors: Jeffrey Lawrence Tonges, Larry Steven Foster, William Paul Cook, Michael Hayes Wilson
  • Patent number: 8725017
    Abstract: A printer is provided including a substrate transport apparatus; a pick mechanism; a fuser assembly having a heat transfer member including a belt and a heater, a backup member for engaging the belt so as to define a fusing nip with the belt, and a temperature sensor associated with the backup member for sensing the temperature of the backup member; and a controller coupled to the substrate transport apparatus, the pick mechanism, the heater and the temperature sensor. The controller causes the pick mechanism to remove substrates from the storage tray at a first pick rate when the backup member is at a temperature within a first backup member index temperature range and at different pick rate less than the first pick rate when the backup member is at a temperature greater than the first backup member index temperature range.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: May 13, 2014
    Assignee: Lexmark International, Inc.
    Inventors: Thomas Judson Campbell, Jichang Cao, William Paul Cook, Hrishikesh Pramod Gogate, David William Shuman
  • Patent number: 8366099
    Abstract: A media retraction and recycler system for use with image processing devices such as automatic document feeders and printers that concurrently supports two media sheets for duplex printing or scanning in a partial overlapping configuration in a variable nip pressure exit roll assembly allowing use of a media path that is shorter than the total media length of the two media sheets to facilitate an increased throughput during duplex scanning or printing operations.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: February 5, 2013
    Assignee: Lexmark International, Inc.
    Inventor: William Paul Cook
  • Publication number: 20120205855
    Abstract: A media retraction and recycler system for use with image processing devices such as automatic document feeders and printers that concurrently supports two media sheets for duplex printing or scanning in a partial overlapping configuration in a variable nip pressure exit roll assembly allowing use of a media path that is shorter than the total media length of the two media sheets to facilitate an increased throughput during duplex scanning or printing operations.
    Type: Application
    Filed: February 16, 2011
    Publication date: August 16, 2012
    Inventor: William Paul Cook
  • Patent number: 8213822
    Abstract: A system for delivering desired magnitudes of AC power to a load. A three-cycle power mode includes a 1st and 3rd cycle in which either no AC power, or full power, is delivered to the load, and a 2nd cycle in which an AC switch is triggered at a desired phase angle to deliver the desired increments of AC power during the 2nd cycle. AC power is delivered in each cycle in a manner to provide a net zero DC offset in the AC current delivered to the load. A two-cycle mode can be achieved by using the 1st and 2nd cycle, or by using the 2nd and 3rd cycles to optimize power delivery performance. A multi-cycle power delivery system can employ both the three-cycle and the two-cycle modes together to minimize the harmonic content during delivery of various power levels.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: July 3, 2012
    Assignee: Lexmark International, Inc.
    Inventors: William Paul Cook, Michael Charles Day, Wesley David McIntire
  • Patent number: 8175482
    Abstract: A printer is provided comprising substrate transport apparatus for moving substrates along a substrate path through the printer; a fuser assembly comprising a heat transfer member including a belt and a heater to heat the belt, a backup member adapted to engage the belt so as to define a fusing nip with the belt, and a temperature sensor for sensing a temperature of a portion of the backup member; and a controller coupled to the temperature sensor. Based on signals generated by the temperature sensor, the controller determines whether a substrate moving along the substrate path has been contacted by the backup member portion.
    Type: Grant
    Filed: December 31, 2010
    Date of Patent: May 8, 2012
    Assignee: Lexmark International, Inc.
    Inventors: Thomas Judson Campbell, Jichang Cao, William Paul Cook, James Douglas Gilmore, Hrishikesh Pramod Gogate, James Allen Lokovich, Wesley David McIntire
  • Patent number: 8165495
    Abstract: The present application is directed to methods and devices for moving a cartridge between engaged and disengaged positions in an image forming device. The image forming device may include a bias control arm movable between first and second positions. When the bias control arm is in one of the first and second positions, a biasing force on the cartridge is reduced and the cartridge moves to the disengaged position. When the bias control arm is in the other of the first and second positions, a biasing force on the cartridge is increased and the cartridge is moved to the engaged position. In one embodiment, the bias control arm moves in a first direction, and the cartridge moves in a second direction different than the first direction.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: April 24, 2012
    Assignee: Lexmark International, Inc.
    Inventors: Jeffrey Lawrence Tonges, Larry Steven Foster, William Paul Cook, Michael Hayes Wilson
  • Patent number: 8064816
    Abstract: A printer is provided, including a substrate transport apparatus for moving substrates along a substrate path; a media sensor actuated by mid-width and full substrates but not by narrow width substrates; and a fuser assembly including a belt, a heater to heat the belt, a backup member to engage the belt so as to define a fusing nip with the belt, and a temperature sensor for sensing a temperature of a portion of the backup member engaging only full width substrates. A controller is coupled to the media sensor and the temperature sensor for determining whether a substrate moving through the fuser assembly is a narrow width, mid-width or full width substrate.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: November 22, 2011
    Assignee: Lexmark International, Inc.
    Inventors: Thomas Judson Campbell, Jichang Cao, William Paul Cook, James Douglas Gilmore, Hrishikesh Pramod Gogate, James Allen Lokovich, Wesley David McIntire
  • Patent number: 8023851
    Abstract: A method for setting a heater element of a fuser assembly to a consistent starting condition to achieve consistency in heating power measurement is provided. The heater element is heated to a first predefined temperature when the temperature of the heater element is less than the first predefined temperature. The temperature of the heater element is maintained within a predefined range for a predefined period of time. This sets the temperature of the heater element in the fuser assembly to a consistent starting condition. Thereafter, the heating power estimation measurement is made and heating power supplied to the fuser assembly is estimated. This controls the heating power delivered to the fuser assembly in a consistent manner.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: September 20, 2011
    Assignee: Lexmark International, Inc.
    Inventors: Jichang Cao, William Paul Cook, Hrishikesh Pramod Gogate, Wesley David McIntire
  • Patent number: 8018604
    Abstract: The present application is directed to methods and devices for determining the presence of a module and presence of a media sheet in a media path using output signals from a single sensor in an image forming device. One embodiment includes a sensor which may be oriented in a variety of positions through interaction with the module and the media sheet. An algorithm may be used to determine the presence of the module in a module insertion path and presence of the media sheet in the media path based on the position of the sensor.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: September 13, 2011
    Assignee: Lexmark International, Inc.
    Inventors: Niko Jay Murrell, Brian Allen Blair, Jason Lee Rowe, William Paul Cook
  • Publication number: 20110205557
    Abstract: A method for transferring images, to media sheets, of a simplex print job including a simplex image and a duplex print job including a first image and a second image received at an image forming apparatus having a duplexer and a media path having a duplex portion. During printing the second image of the duplex print job is printed on a first side of a first media sheet and the first media sheet is sent into duplexer and the duplex portion of the media path. Next, the first image of the simplex print job is transferred to a second media sheet and sent to an output bin, and finally the first image of the duplex print job is transferred to a second side of the first media sheet. The first image of the simplex print job is printed on the second media sheet while the first media sheet is traveling through the duplex portion of the media path of the image forming apparatus helping to increase image apparatus throughput.
    Type: Application
    Filed: February 19, 2010
    Publication date: August 25, 2011
    Inventor: William Paul Cook
  • Patent number: 8005391
    Abstract: The present application is directed to methods for determining when to transition between printing color images and printing black-only images in an image forming device. A variety of factors may be evaluated in order to select a trigger value. An examined portion of a print history and an examined portion of a print queue may be evaluated to determine one or more test values. Based on a comparison of the one or more test values with the trigger value, a determination may be made whether to transition between color printing and black-only printing.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: August 23, 2011
    Assignee: Lexmark International, Inc.
    Inventor: William Paul Cook
  • Patent number: 7957665
    Abstract: The embodiments disclosed herein are directed to methods and devices for a control system to regulate the output voltage of a high voltage power supply (HVPS) in an image forming device. In one embodiment, the HVPS comprises at least two voltage sources connected in series. A print engine controller is configured to disable at least one of the voltage sources when a voltage draw of a load exceeds a maximum differential voltage of the at least two voltage sources.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: June 7, 2011
    Assignee: Lexmark International, Inc.
    Inventors: Michael Charles Day, William Paul Cook
  • Patent number: 7957661
    Abstract: An image fixing assembly includes a heating unit having a heating element and a fusing member enclosing the heating element; a backup member; and a heat conducting member. The fusing member is configured to rotate around the heating element. Further, the fusing member is capable of being heated by the heating element. The backup member is abuttingly coupled to the fusing member for configuring a nip portion therebetween, and is capable of pressing media sheets against the fusing member, when the media sheets pass through the nip portion. The heat conducting member is capable of retractably coupling to one of the fusing member and the backup member for enabling flow of heat between the one of the fusing member and the backup member, and the heat conducting member, for reducing a thermal gradient. Further disclosed is a method for fixing images on the media sheets using the image fixing assembly.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: June 7, 2011
    Assignee: Lexmark International, Inc.
    Inventors: Jichang Cao, William Paul Cook, John William Kietzman
  • Publication number: 20110097663
    Abstract: A printer is provided comprising substrate transport apparatus for moving substrates along a substrate path through the printer; a fuser assembly comprising a heat transfer member including a belt and a heater to heat the belt, a backup member adapted to engage the belt so as to define a fusing nip with the belt, and a temperature sensor for sensing a temperature of a portion of the backup member; and a controller coupled to the temperature sensor. Based on signals generated by the temperature sensor, the controller determines whether a substrate moving along the substrate path has been contacted by the backup member portion.
    Type: Application
    Filed: December 31, 2010
    Publication date: April 28, 2011
    Inventors: Thomas Judson Campbell, Jichang Cao, William Paul Cook, James Douglas Gilmore, Hrishikesh Pramod Gogate, James Allen Lokovich, Wesley David McIntire
  • Patent number: 7933530
    Abstract: A printer is provided including a reference edge, a fuser assembly, a cooling apparatus and a controller. The reference edge is adapted to be contacted by a substrate as the substrate moves along a substrate path through the printer. The fuser assembly includes a heat transfer member including a belt and a backup member. The cooling apparatus is adapted to move cooling air capable of cooling the fuser assembly. The controller is configured to activate the cooling apparatus after determining that a first end portion of the backup member opposite a second end portion of the backup member near the reference edge is at a temperature above a predefined first threshold temperature.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: April 26, 2011
    Assignee: Lexmark International, Inc.
    Inventors: William Paul Cook, Hrishikesh Pramod Gogate, Kimberely Aubrey Thuringer, Edward Lynn Triplett