Method of removing blemishes in compression molded articles
AssigneeOwens-Illinois Closure Inc.
InventorMark Ronald Hock
Life of this patent
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Abstract
A method of compression molding a closure having a base wall and peripheral skirt with internal threads, a thermoplastic resin blended with metallic particles wherein the particles are added in elliptical or spherical form. The metallic particles are provided in a carrier of resin which is then blended with the resin of the closure and the melt blend is extruded through a nozzle and cut into individual pellets. Each pellet is deposited into the cavity of a mold which is then closed to compression mold a closure.
Claims18
In a method of compression molding a plastic closure having a base wall and a peripheral skirt with internal threads, in which a thermoplastic resin is blended with metallic particles, the melt blend is extruded through a nozzle, cut into individual pellets, each pellet is deposited into the cavity of a mold which is then closed to compression mold a closure, the improvement
- wherein said step of adding particles comprises adding metallic particles in ellipsoidal or spherical form.
A compression molded plastic closure comprising a base wall and a peripheral skirt with internal threads,
- said closure having a plurality of metallic particles in ellipsoidal or spherical form distributed therein.
Dependencies are inferred from the claim text.