Patents by Inventor Andrew Keith Walker

Andrew Keith Walker 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).

  • Motor control system and method for a rotary hole punch system
    Patent number: 10071494
    Abstract: A sheet processing apparatus includes a punch mechanism disposed along a media path at a punch point at which a hole is to be punched through a punch location on a media sheet advancing along the media path. The punch mechanism includes a rotatable punch arm having a punch head, and a punch motor for rotating the punch arm. As the punch location on the advancing media sheet approaches the punch point, speed of the punch motor is controlled to adjust a rotational speed of the punch arm based on feedback signals associated with each of the punch motor and a media path motor used to advance the media sheet such that the punch head arrives at the punch point at substantially the same time as when the punch location on the media sheet arrives at the punch point.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: September 11, 2018
    Assignee: Lexmark International, Inc.
    Inventors: Roel Firmeza Pantonial, Brian Anthony Reichert, Andrew Keith Walker
  • MOTOR CONTROL SYSTEM AND METHOD FOR A ROTARY HOLE PUNCH SYSTEM
    Publication number: 20170144321
    Abstract: A sheet processing apparatus includes a punch mechanism disposed along a media path at a punch point at which a hole is to be punched through a punch location on a media sheet advancing along the media path. The punch mechanism includes a rotatable punch arm having a punch head, and a punch motor for rotating the punch arm. As the punch location on the advancing media sheet approaches the punch point, speed of the punch motor is controlled to adjust a rotational speed of the punch arm based on feedback signals associated with each of the punch motor and a media path motor used to advance the media sheet such that the punch head arrives at the punch point at substantially the same time as when the punch location on the media sheet arrives at the punch point.
    Type: Application
    Filed: February 6, 2017
    Publication date: May 25, 2017
    Inventors: ROEL FIRMEZA PANTONIAL, BRIAN ANTHONY REICHERT, ANDREW KEITH WALKER
  • Motor control system and method for a rotary hole punch system
    Patent number: 9579814
    Abstract: A sheet processing apparatus and methods of utilizing the same. The sheet processing apparatus includes a punch mechanism disposed along a media path at a punch point at which a hole is to be punched through a punch location on a media sheet advancing along the media path. The punch mechanism includes a rotatable punch arm having a punch head, and a punch motor for rotating the punch arm. As the punch location on the advancing media sheet approaches the punch point, speed of the punch motor is controlled to adjust a rotational speed of the punch arm based on feedback signals associated with each of the punch motor and a media path motor used to advance the media sheet such that the punch head arrives at the punch point at substantially the same time as when the punch location on the media sheet arrives at the punch point.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: February 28, 2017
    Assignee: Lexmark International, Inc.
    Inventors: Roel Firmeza Pantonial, Brian Anthony Reichert, Andrew Keith Walker
  • Motor Control System and Method for a Rotary Hole Punch System
    Publication number: 20150298336
    Abstract: A sheet processing apparatus and methods of utilizing the same. The sheet processing apparatus includes a punch mechanism disposed along a media path at a punch point at which a hole is to be punched through a punch location on a media sheet advancing along the media path. The punch mechanism includes a rotatable punch arm having a punch head, and a punch motor for rotating the punch arm. As the punch location on the advancing media sheet approaches the punch point, speed of the punch motor is controlled to adjust a rotational speed of the punch arm based on feedback signals associated with each of the punch motor and a media path motor used to advance the media sheet such that the punch head arrives at the punch point at substantially the same time as when the punch location on the media sheet arrives at the punch point.
    Type: Application
    Filed: April 22, 2014
    Publication date: October 22, 2015
    Applicant: Lexmark International, Inc.
    Inventors: Roel Firmeza Pantonial, Brian Anthony Reichert, Andrew Keith Walker