Patents by Inventor John K. Groetzinger

John K. Groetzinger 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).

  • Spray system for cleaning a filter screen
    Patent number: 5593585
    Abstract: A screening chamber for filtering paper coatings is cleaned with the use of a plurality of water sprays. The water sprays are provided by nozzles located on spray bars positioned transversely across the width of the screening chamber. The nozzles are oriented to direct selected spray patterns tangentially against the screens, and against the interior surfaces of the screening chambers, to remove particulates, debris and other contaminates which collect on the screen during the filtering process.
    Type: Grant
    Filed: September 15, 1994
    Date of Patent: January 14, 1997
    Inventor: John K. Groetzinger
  • Glass melter exhaust duct cleaning method and apparatus
    Patent number: 4969942
    Abstract: Deposits of glassmaking materials are removed from an exhaust duct by periodic blasts of air from a plurality of nozzles mounted in the duct. The arrangement avoids the disruption caused by manual cleaning and permits more frequent removal of deposits, thereby minimizing perturbations to the glassmaking process.
    Type: Grant
    Filed: January 2, 1990
    Date of Patent: November 13, 1990
    Assignee: PPG Industries, Inc.
    Inventors: Ronald L. Schwenninger, John K. Groetzinger
  • Air cooled rotary kiln collar
    Patent number: 4836775
    Abstract: An air cooled rotary kiln collar for use in improving the delivery of preheated charge material from the rotary kiln to the second stage of a multi-stage heating process. Adjustable rate fans circulate air through an annular collar at the discharge end of the rotary kiln to remove heat from the charge material and prevent it from agglomerating and sticking to the kiln.
    Type: Grant
    Filed: June 16, 1988
    Date of Patent: June 6, 1989
    Assignee: PPG Industries, Inc.
    Inventors: Robert B. Heithoff, John K. Groetzinger
  • Method of preheating pulverulent batch material
    Patent number: 4707175
    Abstract: An air cooled rotary kiln collar for use in improving the delivery of preheated charge material from the rotary kiln to the second stage of a multi-stage heating process. Adustable rate fans circulate air through an annular collar at the discharge end of the rotary kiln to remove heat from the charge material and prevent it from agglomerating and sticking to the kiln.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: November 17, 1987
    Assignee: PPG Industries, Inc.
    Inventors: Robert B. Heithoff, John K. Groetzinger
  • Method and apparatus for feeding an ablation liquefaction process
    Patent number: 4529428
    Abstract: In a method and apparatus for melting pulverulent material such as glass batch wherein liquefaction takes place on a stable layer of pulverulent material, adjustable means are provided for feeding the material in a controlled manner onto the active melting surface.
    Type: Grant
    Filed: November 25, 1983
    Date of Patent: July 16, 1985
    Assignee: PPG Industries, Inc.
    Inventor: John K. Groetzinger
  • Transition between batch preheating and liquefying stages apparatus
    Patent number: 4496387
    Abstract: A rotary batch preheating kiln feeding batch materials to a batch liquefying vessel is separated from the liquefying vessel by a transition section including duct means to direct exhaust gas from the liquefying vessel to the interior of the rotary kiln at a location spaced from the discharge location of the kiln. The transition section also shields the rotary kiln from radiant heat from the liquefaction vessel.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: January 29, 1985
    Assignee: PPG Industries, Inc.
    Inventors: Robert B. Heithoff, John K. Groetzinger, Ronald L. Schwenninger