Patents by Inventor Robert Edward Hackett

Robert Edward Hackett 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).

  • Dampening mechanism for an image forming apparatus
    Patent number: 7236730
    Abstract: There is provided a system and mechanism for substantially reducing or substantially eliminating vibration or noise of a doctor blade of an image forming apparatus during operation. The system and mechanism provided includes at least one contact in communication with a doctor blade surface, e.g., a front surface, to substantially reduce or substantially eliminate vibration and/or noise associated with a doctor blade during image forming.
    Type: Grant
    Filed: November 17, 2004
    Date of Patent: June 26, 2007
    Assignee: Lexmark International, Inc.
    Inventors: James Eric Dickerson, Robert Edward Hackett, Donald Thomas Kral, Donald Wayne Stafford
  • Magnetic roller and methods of producing the same
    Patent number: 6897752
    Abstract: A magnetic roller for electrophotography comprises a foamed resin magnetic material. A method of producing a magnetic roller comprises the steps of providing magnetic filler, a resin binder and a foaming agent in a closed mold; activating the foaming agent in the closed mold; and removing the resulting formed roller from the mold.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: May 24, 2005
    Assignee: Lexmark International, Inc.
    Inventors: Michael John Dixon, Robert Edward Hackett, Joe Leroy McGuire
  • Magnetic roller and methods of producing the same
    Publication number: 20030025583
    Abstract: A magnetic roller for electrophotography comprises a foamed resin magnetic material. A method of producing a magnetic roller comprises the steps of providing magnetic filler, a resin binder and a foaming agent in a closed mold; activating the foaming agent in the closed mold; and removing the resulting formed roller from the mold.
    Type: Application
    Filed: July 25, 2001
    Publication date: February 6, 2003
    Inventors: Michael John Dixon, Robert Edward Hackett, Joe Leroy McGuire
  • Rod and apparatus for calibrating magnetic roll testing apparatus
    Patent number: 6452380
    Abstract: A calibration rod (1) with grooved track (2) and a testing apparatus (17) for magnetic rolls that produces an accurate homing location and probe-to-probe reference for repeated test verification at many testing locations. The grooved track calibration rod can be transported to different equipment to verify that equipment is performing similarly, has improved accuracy, has temperature compensation, uses a circumferential drive movement from one end of a roll magnet and verifies angular position from the other end, eliminates the possibility of angular inaccuracy from twisting of the part being measured during clamping and provides for improved accuracy of several degrees. A high order polynomial curve fit of the data is used to determine the true value of the Gauss level being measured during 360 degree revolution. The apparatus takes measurements to accurately measure magnetic differences which define differences in probe operation.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: September 17, 2002
    Assignee: Lexmark International, Inc.
    Inventors: Wayne Gerard Fieseler, Mark Duane Foster, Robert Edward Hackett, Calvin Dale Murphy, James Edward Nichols