Patents Assigned to Nordson Corp.
  • System and method for coincidence detection of ungrounded parts with detectors located within and outside a production coating area
    Patent number: 5598099
    Abstract: A system and method for coincidence detection of ungrounded or inadequately grounded parts during the electrostatic coating process in order to improve production flow, provide an overall cost saving by efficient use of the coating material and prevention of accidental fires and false shutdown during production. The present invention utilizes a coincidence detection technique which performs a test for radio-frequency electromagnetic energy radiated by sparking and/or corona discharge caused by ungrounded parts outside a electrostatic coating area and a test for sensing and discriminating spurious radio-frequency electromagnetic energy radiated by sparking and/or corona discharge caused by any other external source. In accordance with one specific embodiment, the test performed outside the booth may include a further test for detecting ultraviolet energy radiated by the sparking and/or corona discharge.
    Type: Grant
    Filed: June 22, 1995
    Date of Patent: January 28, 1997
    Assignees: Fire Sentry Systems, Inc., Nordson Corp.
    Inventors: David A. Castleman, Don R. Scarbrough, Robert C. Lindrud
  • Transfer of electrostatic charge through a turbine drive shaft to a rotary atomizer head
    Patent number: 5346139
    Abstract: A rotary atomizer having a low capacitance, cup-shaped, atomizing head mounted for rotation about an axis of rotation has a coating material flow surface forming a forward cavity. A rotary drive means coupled to the atomizing head rotates the atomizing head about the axis of rotation. High voltage electrostatic energy is conducted through the rotary drive means directly into the atomizing head whereby charged coating material flows outwardly across the flow surface.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: September 13, 1994
    Assignee: Nordson Corp.
    Inventors: Dennis Davis, Harold Beam
  • Coating system including indexing turret rotatable in the vertical and horizontal planes about a stationary shaft with loading and unloading of containers and closures from the edges of the turret
    Patent number: 5254164
    Abstract: This invention relates to coating systems and to methods and apparatus for coating containers and closures employing container and closure indexing machines having vacuum chucks mounted on the edge of one or more turrets rotating in horizontal or vertical planes about a stationary shaft for loading, spray coating, optionally curing and unloading can and can ends secured to vacuum chucks extending radially from the edges of the turret. Further, devices are provided for loading and unloading cans and can lids onto and off of a turret rotating in either the horizontal or vertical plane.
    Type: Grant
    Filed: June 15, 1992
    Date of Patent: October 19, 1993
    Assignee: Nordson Corp.
    Inventor: Matsunaga Masahumi
  • Sanitary napkin package with integral release liner
    Patent number: H1454
    Abstract: Apparatus and methods for encasing a sanitary napkin in a pouch which eliminates the need for release paper strips and provides for the disposal of the napkin.
    Type: Grant
    Filed: November 9, 1993
    Date of Patent: June 6, 1995
    Assignee: Nordson Corp.
    Inventors: Carl C. Cucuzza, John M. Raterman