Patents by Inventor Kevin Lo

Kevin Lo 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).

  • Patent number: 9162488
    Abstract: In one example, a media guide for use with a print bar includes a plate suspended over the print bar to guide a leading edge of print media away from printheads on the print bar during printing when the print bar is installed in a printer.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: October 20, 2015
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Kevin Lo, Wesley R Schalk, Paul Coffin
  • Patent number: 9132666
    Abstract: Examples disclosed herein relate to curl control assembly for use in a printing device having an output for printed media. One such example includes an ejection flap assembly adjacent the output configured to controllably assume a first predetermined position designed to help control a first amount of curl of the printed media and a second predetermined position designed to help control a second amount of curl of the printed media. The example additionally includes a positioning assembly adjacent the ejection flap assembly configured to selectively position the ejection flap assembly in either the first predetermined position or the second predetermined position and an actuator coupled to the positioning assembly that has a latched state that helps prevent movement of the positioning assembly and an unlatched state that permits movement of the positioning assembly. An example of a curl control method for use in a printing device is additionally disclosed.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: September 15, 2015
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Kevin Lo, David Whalen, Raymond C. Sherman, Terry Lingmann
  • Publication number: 20150239265
    Abstract: A printer paper tray comprising a paper tray bezel, and a paper tray cassette coupled to the paper tray bezel, in which the paper tray bezel moves in the x and y direction independent of the paper tray cassette. A printer comprising a paper tray comprising a bezel coupled to a cassette in which the bezel moves independent of the cassette and is biased towards the cassette in the x direction. A bezel mounting system comprising a number of biasing members to bias a printer tray bezel towards a printer tray cassette in the x-direction, and a number of biasing pads to bias the bezel in a substantially centered position with respect to the cassette.
    Type: Application
    Filed: September 26, 2012
    Publication date: August 27, 2015
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Kevin Lo, Brian Davis
  • Publication number: 20150231898
    Abstract: In one example, a media guide for use in a printer having a print bar and a print zone adjacent to the print bar includes a movable blocker downstream from the print zone along a media path and movable though a range of motion to block print media from leaving the media path when exiting the print zone.
    Type: Application
    Filed: April 10, 2012
    Publication date: August 20, 2015
    Inventors: Timothy Jacob Luedeman, Kevin Lo, Wesley R. Schalk
  • Publication number: 20150225943
    Abstract: An apparatus (140) for mitigating noise in a printer (110) can include a plate (150) having a plurality of holes distributed across the plate (150) and extending through the plate (150), the holes being dimensioned and configured to mitigate acoustic noise in a printer (110). A mesh material (160) can cover the plurality of holes, wherein the mesh material (160) can increase air flow resistance through the holes and thereby facilitate removal of acoustic noise from a media path in the printer (110).
    Type: Application
    Filed: September 25, 2012
    Publication date: August 13, 2015
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Charles Hugh Oppenheimer, Michael Allison, Kevin Lo
  • Publication number: 20150124033
    Abstract: In one example, a media guide for use with a print bar includes a plate suspended over the print bar to guide a leading edge of print media away from printheads on the print bar during printing when the print bar is installed in a printer.
    Type: Application
    Filed: June 26, 2012
    Publication date: May 7, 2015
    Inventors: Kevin Lo, Wesley R Schalk, Paul Coffin
  • Publication number: 20150103112
    Abstract: A media handling system is disclosed herein. An example includes media path, a transport assembly to move print media through the media path, a processor, and a non-transitory storage medium including instructions that cause the processor to control the transport assembly to: move a first medium and second through the media path, overlap a trailing portion of the first medium and a leading portion of the second medium within the media path, overlap a leading portion of the first medium and a trailing portion of the second medium within the media path, and overlap the trailing portion of the first medium and the leading portion of the second medium during a time that the leading portion of the first medium and the trailing portion of the second medium is also overlapped. A method of media handling is also disclosed herein as is a non-transitory storage medium.
    Type: Application
    Filed: June 28, 2012
    Publication date: April 16, 2015
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Kevin Lo, Daniel Fredrickson
  • Patent number: 9004485
    Abstract: Embodiments of the invention include a media tray for a media advance mechanism. The media tray includes an access door attached to the media tray via a hinge oriented in a vertical direction and a cleanout disposed on an interior surface of the access door. The access door pivots open around the hinge. The cleanout is mounted such that the cleanout can move translationally along the access door.
    Type: Grant
    Filed: January 21, 2013
    Date of Patent: April 14, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kevin Lo, Jerrod Houston Tyler, Jeffrey Castleberry
  • Publication number: 20150084270
    Abstract: An apparatus for actuating a lift plate of a media tray is disclosed herein. An example of the apparatus includes a rocker assembly adjacent the lift plate and a slide assembly coupled to the rocker assembly to actuate the rocker assembly subsequent to insertion of the media tray in a printing device, thereby raising the lift plate. The apparatus additionally includes a lock assembly to release the lock assembly upon initiation of opening of the media tray, thereby allowing the lift plate to lower prior to such removal. A media tray and method for actuating a lift plate of a media tray are also disclosed herein.
    Type: Application
    Filed: June 26, 2012
    Publication date: March 26, 2015
    Inventors: Kevin Lo, Jerrod Tyler, John Pruyn
  • Publication number: 20150042236
    Abstract: A circuit for driving a light emitting diode (LED) comprises: an alternating voltage power supply, comprising a triac dimmer having a firing angle and output terminals that provide power to the LED: a zero crossing detector that detects a polarity change of the alternating voltage provided by the alternating voltage power supply and provides a zero crossing output signal indicative of the zero crossing; a timer triggered by the zero crossing output signal that generates a timer output signal, during a time period of the timer; and LED power circuitry that reduces current to the light emitting diode based upon timing characteristics of the timer output signal.
    Type: Application
    Filed: September 19, 2014
    Publication date: February 12, 2015
    Applicant: Huizhou Light Engine Limited
    Inventors: Chung Ping Kevin Lo, Kwok Hung Poon, Wa Hing Leung, Kam Wah Siu
  • Publication number: 20150022608
    Abstract: A printer includes a print engine to print on print media within a print zone, a media tray to hold a quantity of the print media, and at least one service module to service the print engine, wherein the at least one service module is at least one of positioned vertically of the print engine and laterally of the media tray, and positioned laterally of the print engine and vertically of the media tray.
    Type: Application
    Filed: October 9, 2014
    Publication date: January 22, 2015
    Inventors: Kevin Lo, Wesley R. Schalk
  • Patent number: 8928241
    Abstract: A circuit for driving a light emitting diode (LED) comprises: an alternating voltage power supply, comprising a triac dimmer having a firing angle and output terminals that provide power to the LED; a zero crossing detector that detects a polarity change of the alternating voltage provided by the alternating voltage power supply and provides a zero crossing output signal indicative of the zero crossing; a timer triggered by the zero crossing output signal that generates a timer output signal during a time period of the timer; and LED power circuitry that reduces current to the light emitting diode based upon timing characteristics of the timer output signal.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: January 6, 2015
    Assignee: Huizhou Light Engine Ltd.
    Inventors: Chung Ping Kevin Lo, Kwok Hung Poon, Wa-Hing Leung, Kam Wah Siu
  • Patent number: 8929798
    Abstract: A printer including a printer housing further including a cavity and a print media tray arranged to fit within the cavity.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: January 6, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jerrod H. Tyler, Kevin Lo, Raymond C. Sherman
  • Publication number: 20150001790
    Abstract: Examples disclosed herein relate to curl control assembly for use in a printing device having an output for printed media. One such example includes an ejection flap assembly adjacent the output con Figured to controllably assume a first predetermined position designed to help control a first amount of curl of the printed media and a second predetermined position designed to help control a second amount of curl of the printed media. The example additionally includes a positioning assembly adjacent the ejection flap assembly configured to selectively position the ejection flap assembly in either the first predetermined position or the second predetermined position and an actuator coupled to the positioning assembly that has a latched state that helps prevent movement of the positioning assembly and an unlatched state that permits movement of the positioning assembly. An example of a curl control method for use in a printing device is additionally disclosed.
    Type: Application
    Filed: January 24, 2012
    Publication date: January 1, 2015
    Inventors: Kevin Lo, David Whalen, Raymond C. Sherman, Terry Lngmann
  • Patent number: 8913948
    Abstract: A printer accessory including a housing and a connector, the connector having a frame defining an opening in the housing, and including a contact housing and a door slideably disposed within the opening. Biasing elements bias the contact housing and door to extend from the opening, wherein the door is configured to be depressed into the housing through the opening to expose electrical contacts on the contact housing.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: December 16, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jerrod Houston Tyler, Kevin Lo, Jeffrey Castleberry, Alvaro Pardo
  • Patent number: 8905537
    Abstract: A media handling device for a printer is provided. The media handling device includes a base structure and an assembly provided on the base structure. The assembly comprises a carrier structure that has a first end that is coupled to the base structure. The carrier structure is coupled to the base structure to move inwards from an original position and is under bias to return to the original position, in order to receive a media sheet during a print operation. The assembly also comprises a set of starwheels provided with the carrier structure. Each starwheel rotates while contacting the media sheet during the print operation.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: December 9, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kevin Lo, David Whalen, John Engel
  • Patent number: 8899741
    Abstract: A printer includes a print engine to print on print media within a print zone, a print media path including a print path portion to direct the print media through the print zone in a first direction, a duplex media path including a duplexing path portion to redirect the print media to the print media path in a second direction opposite the first direction, and a media tray to hold a quantity of the print media.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: December 2, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kevin Lo, Wesley R. Schalk
  • Publication number: 20140333699
    Abstract: An image forming apparatus includes a substrate receiving member, a fluid applicator unit, and an air recirculator assembly. The substrate receiving member may selectively receive a substrate. The fluid applicator unit may selectively eject a first set of drops to the substrate received by the substrate receiving member in a print mode and a second set of drops in a maintenance mode. The air recirculater assembly may direct air to form an air barrier across the print zone to redirect at least one of aerosol and particulates from crossing through the air barrier and onto the substrate, to filter the at least one of the aerosol and particulates to form filtered air, and to form the air barrier with the filtered air.
    Type: Application
    Filed: March 30, 2012
    Publication date: November 13, 2014
    Inventors: Steve O'Hara, Christie Dyan Larson, Kevin Lo
  • Patent number: D718383
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: November 25, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kevin Lo, Dan R. Dwyer, Mark M. Proia, Stephen G. Brown, Wesley R. Schalk, David M. Wetchler
  • Patent number: D720398
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: December 30, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kevin Lo, Dan R. Dwyer, Mark M. Proia, Stephen G. Brown, Wesley R. Schalk, David M. Wetchler