Thermoplastic block shape and manufacturing method

摘要

An elongate piece of solid thermoplastic material having coaxial generally cylindrical portions with uniform predetermined axial and diametrical dimensions uniformly axially spaced along the piece by generally rectangular portions having diagonal dimensions about equal to the diametrical dimension of the cylindrical portions, and a device for continuously molding a continuous length of solid thermoplastic material between molds moved face to face along a linear path from which such elongate pieces can be cut.