Patent ID: 6270838
Filing Date: 2001-08-07
Classification: B05B,B05D

Abstract:
A method for applying a locking element of thermoplastic material to a succession of internally threaded articles having open ends to the threaded portion thereof and an axis running along the threaded portion between said open ends, comprising the steps of:conveying said threaded articles on support in a path for treatment with the axes of their threaded portions in a substantially horizontal position and with each of the open ends at the threaded portions at least partially uncovered to permit a passage of an amount of thermoplastic material through said open ends;directing a stream of thermoplastic material onto and around an area of said threaded portions in a sufficient amount needed to form said locking element; andthereafter heating said threaded portions of said threaded articles to a temperature above the softening point of the thermoplastic material to be applied.