Method and apparatus for application of 360° coatings to articles
OwnerJohn S. Wallace, James P. DeFillipi +2inventors
InventorsJohn S. Wallace, James P. DeFillipi, Joseph A. Lopetrone, Charles M. Stempien
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Abstract
A method for applying coatings to a portion of the internal bore or threads of a fastener or similar article having an opening on at least one end is provided. A 360° coating with material is provided using centrifugal force to assist in direction the material to a desired surface, which does not require use of a pressurized air stream in order to propel the coating material toward the walls of the article desired to be coated.
Claims17
A method of applying 360° coatings using powdered coating material to a predetermined portion of an internal opening of a plurality of fasteners, comprising the steps of:
- supporting and continuously conveying the fasteners along a predetermined path;
- preheating said fasteners above the softening point of the coating material;
- simultaneously applying said powdered coating material to the 360° circumference of said predetermined portion of the internal opening of said preheated fasteners in an amount in excess of that required to form the coating:
- and
- propelling the coating material applied in said applying step towards the walls of the internal opening of each of said fasteners to be coated in a manner so that at least 90% of the coating material applied remains adhered to said predetermined portion of said internal opening of said fasteners.
A method of applying a powdered coating material to fasteners having an internal bore, the coating being applied comprising the steps of:
- supporting and continuously conveying the fasteners along a predetermined path;
- preheating said fasteners to within a predetermined temperature range as the said fasteners arc conveyed;
- and
- simultaneously applying coating material onto the entire 360° circumference of a predetermined portion of the internal bore of said preheated fasteners.
Dependencies are inferred from the claim text.