Patents by Inventor Michael T. Riggins

Michael T. Riggins 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).

  • Roller caliper gauge
    Patent number: 4741109
    Abstract: A roller caliper gauge for providing an accurate measurement of the thickness of a high speed web of paper or the like in which a proximity device located within a housing disposed between a pair of rollers on a head on one side of the web is responsive to a web in an operative position adjacent to the housing. A platen on a head on the other side of the housing is pneumatically moved toward the rollers to cause the web to make line contact with the rollers when in the operative position.
    Type: Grant
    Filed: November 7, 1986
    Date of Patent: May 3, 1988
    Assignee: Sentrol Systems, Ltd.
    Inventors: Donald J. McCurdy, Michael T. Riggin
  • Microwave moisture sensor
    Patent number: 4484133
    Abstract: Microwave moisture measuring apparatus for on-line monitoring of a paper web in which a source of radiation is measured and directed towards the web. Detectors measure the transmitted and reflected energy, and a microcomputer, also having inputs in accordance with the temperature and weight of the web, provides an indication of the moisture content of the web.
    Type: Grant
    Filed: December 23, 1981
    Date of Patent: November 20, 1984
    Assignee: Sentrol Systems Ltd.
    Inventor: Michael T. Riggin
  • Pencil clip
    Patent number: D478630
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: August 19, 2003
    Inventor: Michael T. Riggins