Donald Eugene Shuster

US Patent:

48877700, Dec 19, 1989

Filed:

Jan 19, 1989

Appl. No.:

7/300114

Inventors:

Robert L. Wacker - Wellington OH
Donald E. Shuster - Elyria OH
John Sharpless - Oberlin OH
Alan J. Knobbe - Lorain OH
James C. Murphy - Broadview Heights OH

Assignee:

Nordson Corporation - Westlake OH

International Classification:

B05B 504

US Classification:

239703

Abstract:

Electrostatic liquid spray coating apparatus including a rotary atomizing cup of insulative material driven by an air turbine, is provided with a semi-conductive charging device extending through the cup, the inner portion of which is proximate the inner surface of the cup for contact charging liquid coating material supplied to the rear of the cup as it flows forwardly and outwardly over the rotating cup interior and contacts the charging device prior to atomization at the forward edge of the cup. A generally cylindrical insulative support body, housing a turbine and its associated air bearing and cup drive shaft, has a reduced diameter intermediate section which provides an annular cavity in which are located liquid coating and solvent valves for controlling the flow of liquid coating and solvent to the cup. The charging means in the cup is energized via a stationary conductor which terminates in closely spaced proximity to the outer portion of the charging device on the cup exterior which is electrically connected to the inner portion of the charging device on the cup interior via a series of semi-conductive posts which form the portion of the charging device extending through the wall of the cup between its inner and outer surfaces.

US Patent:

51000571, Mar 31, 1992

Filed:

Mar 30, 1990

Appl. No.:

7/503310

Inventors:

Robert L. Wacker - Wellington OH
Donald E. Shuster - Elyria OH
Ronald J. Hartle - Amherst OH

Assignee:

Nordson Corporation - Westlake OH

International Classification:

B05B 310

US Classification:

239223

Abstract:

A rotary atomizer for spray coating objects includes an onboard color changer valve manifold as well as an optional onboard fluid pressure regulator. The manifold facilitates rapid and efficient color changing while reducing coating material wastage and solvent usage. The invention also contemplates mounting the color changer repositionally along an axis which preferably coincides with the rotary axis of the atomizer. This facilitates installation and removal of the regulator and permits the coating material flow path between the discharge port of the color changer and the atomizing head to be kept short and straight which improves flow control and facilitates thorough flushing of the flow path with solvent. Other improvements including a particular color changer manifold and atomizer head structure are also disclosed.