Patent ID: 6063437
Filing Date: 2000-05-16
Classification: B05B,B05D

Abstract:
A method of forming a coating of thermoplastic material on an internally threaded article, said internally threaded article having a first opening and a second opening at opposite ends of said article and internal threads that circumscribe an axis of said article between said first and second openings, said method comprising the steps of:orienting said axis of said threaded article to be substantially horizontal;conveying said threaded article on a support in a path for treatment so that a material-receiving area of said threads to be coated extends from said first opening to said second opening and is not in contact with said support;applying thermoplastic material from a material discharge onto at least a portion of said area of said internal threads; andheating said applied thermoplastic material to a temperature above a softening point of the applied thermoplastic material to thereby form said coating of thermoplastic material on said internally threaded article.