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US 5,308,658 AGranted
Process and apparatus for efficient spray coating
AssigneeTeledyne Industries, Inc.
InventorGilbert V. Morris
Life of this patent
Estimating the term…
Abstract
Improved non-electrostatic spray coating process and apparatus are provided. The process and apparatus of the present invention permit significant reduction in over-spray conditions as well as, the disadvantages and drawbacks associated therewith, without causing corresponding reduction in coating efficiency.
Claims12
A process for spray coating the surface of a workpiece having at least one surface, said process comprising:
- a. conveying said workpiece in a travel path past a plurality of linearly configured spraying means;
- and
- b. directing a spray of liquid material from said plurality of linearly configured spraying means onto said surface, said spraying means being displaced from said surface by a distance D and being adapted to produce substantially identical elliptically-shaped spray patterns, each said elliptically-shaped pattern having a major axis height h, said patterns overlapping each other with an overlap factor F within a range of between 30 and 50 percent of said major axis height, and wherein said spray means is spaced from one another a spacing distance S which substantially satisfies a first relationship, S=(1-F)/h.
A process for spray coating opposite surfaces of a workpiece, said process comprising:
- a. conveying said workpiece in a travel path between two groups of linearly-configured, oppositely facing groups of spraying means;
- and
- b. directing sprays of liquid material from said two groups of spraying means onto said two surfaces, said groups of spraying means being displaced from said two surfaces by a distance D, and being adapted to produce substantially identical elliptically-shaped spray patterns, each said elliptically-shaped pattern having a major axis height h, said patterns overlapping each other with an overlap factor F within a range of between 30 and 50 percent of said major axis height, and said spray means in each said group are spaced from each other by a spacing distance S substantially equal to (1-F)/H.
Dependencies are inferred from the claim text.