Patents by Inventor Richard G. Christyson

Richard G. Christyson 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).

  • Method and control system for applying solder flux to a printed circuit
    Patent number: 6265017
    Abstract: A first embodiment includes a control system which operates a spray gun to apply an even coating of flux to a circuit board or a plurality of different length circuit boards irrespective of the speed that the circuit board(s) move through a coating chamber. In a second embodiment, the control system pulses the spray gun on and off with a pulsing pattern that coats a plurality of zones of a circuit board with spray patterns of different length and thickness.
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: July 24, 2001
    Assignee: Nordson Corporation
    Inventors: Patrick T. Hogan, Kenneth Zalewski, John P. Byers, James Powell, Drew Roberts, Richard G. Christyson
  • Method and control system for applying solder flux to a printed circuit
    Patent number: 5938848
    Abstract: A first embodiment includes a control system which operates a spray gun to apply an even coating of flux to a circuit board or a plurality of different length circuit boards irrespective of the speed that the circuit board(s) move through a coating chamber. In a second embodiment, the control system pulses the spray gun on and off with a pulsing pattern that coats a plurality of zones of a circuit board with spray patterns of different length and thickness.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: August 17, 1999
    Assignee: Nordson Corporation
    Inventors: Patrick T. Hogan, Kenneth Zalewski, John P. Byers, James Powell, Drew Roberts, Richard G. Christyson
  • Method and apparatus for applying solder flux to a printed circuit
    Patent number: 5415337
    Abstract: Apparatus and methods for a system and process for applying a flux coating to a circuit board by pulsing an airless spray gun on and off to achieve excellent circuit board through-hole penetration and uniform film thickness. An overspray collection system is provided which reduces overspray and increases material utilization and transfer efficiency. A gun positioning mechanism, which can be automated, accurately locates the gun relative to the circuit board.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: May 16, 1995
    Assignee: Nordson Corporation
    Inventors: Patrick T. Hogan, Richard G. Christyson
  • Method and apparatus for applying solder flux to a printed circuit
    Patent number: 5368219
    Abstract: Apparatus and methods for a system and process for applying a flux coating to a circuit board by pulsing an airless spray gun on and off to achieve excellent circuit board through-hole penetration and uniform film thickness. An overspray collection system is provided which reduces overspray and increases material utilization and transfer efficiency. A gun positioning mechanism, which can be automated, accurately locates the gun relative to the circuit board.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: November 29, 1994
    Assignee: Nordson Corporation
    Inventors: Patrick T. Hogan, Richard G. Christyson
  • Coating apparatus with pattern width control
    Patent number: 5316219
    Abstract: An apparatus for manipulating a spray device having a spray nozzle relative to a target substrate, which apparatus includes drive mechanisms for moving the spray device in the X, Y and Z directions, and separate mechanisms for rotating the spray nozzle relative to the spray device and for tilting the spray nozzle relative to the spray device and including a pressure regulator to vary the width of the spray pattern as the spray device moves relative to the target substrate.
    Type: Grant
    Filed: July 8, 1992
    Date of Patent: May 31, 1994
    Assignee: Nordson Corporation
    Inventors: Richard G. Christyson, William E. Donges, James J. Turner
  • Ventilated curing oven and preheat flash zone system for curing coatings on circuit boards
    Patent number: 5288526
    Abstract: Apparatus and process for curing conformal coatings on circuit boards being conveyed through a curing chamber within a UV oven. Warm air, exhausted from a lamp housing containing UV lamps for curing the coatings, is directed into a flash zone chamber through which the coated circuit boards are conveyed prior to entering the UV oven for flashing volatile constituents from the coatings and raising the temperature of the circuit boards.
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: February 22, 1994
    Assignee: Nordson Corporation
    Inventors: Patrick T. Hogan, Richard G. Christyson