PLUNGER FOR HYPODERMIC SYRINGE HAVING INTEGRALLY MOLDED SHAFT AND HEAD AND METHOD FOR MAKING

摘要

Article (22) having portions (23, 26) of materials with different properties are integrally formed by injection of two different thermoplastic materials simultaneously through separate gates (15, 16) into the same mold (10) wherein the materials fuse or bond together. A plunger (22) for a syringe (32) formed by the process has a rigid shaft (23) and an elastomeric head (26).