Patent ID: 6346208
Filing Date: 2002-02-12
Classification: G04B,G04C

Abstract:
A method for manufacturing an assembly comprising a hard thermoplastic watch case having an outside and an internal cavity and at least one push button having a stem and a flexible head projecting outside said case and fixed in a sealed manner onto an external surface of said case lying outside of and around a lateral opening of said case, said stem extending from said head through a lateral opening of said case, said flexible head being attached to said stem and said case and closing in a sealed manner said opening, said stem extendable into the internal cavity of said case when a pressure is applied onto said flexible head, wherein said flexible head is moulded by injecting an elastomeric material which is connected in a sealed manner to an external surface of said case around said opening, and wherein the method comprises the following steps:(I) injecting said plastic material into a mould to form at least said case, (II) modifying part of said mould in the region of said push button head, and (III) injecting said elastomeric material into said part of the mould to form at least said flexible head so that it is heat bonded to said external surface of said case.