Patent ID: 8592733
Filing Date: 2013-11-26
Classification: B23K

Abstract:
1. A method for joining a generally planar first surface, having a sufficient cross section along at least a portion of a periphery of the first surface, to a generally planar second surface, having a similarly sufficient cross section along at least a portion of a periphery of the second surface, to form a closure assembly, the method including the steps of: spacing an upper die from a lower die for receipt of the first surface, made of metal, and the second surface, made of metal, configured in an overlying orientation that aligns the portion of the periphery of the first surface with the portion of the periphery of the second surface, the portions of the peripheries of the first and second surfaces to be induction welded together, providing an obliquely oriented lip on at least one of the upper die and the lower die, securing the portion of the periphery of the first surface to the portion of the periphery of the second surface between said upper and lower dies, the portion of the second periphery to be induction welded located to abut the lip, compressing the first surface towards the second surface at said upper die and said lower die at the portions of the peripheries of the first and second surfaces to be induction welded to form an end-to-end compressed first and second surface arrangement, inductively heating the portions of the peripheries of the first and second surfaces forming said end-to-end compressed first and second surface arrangement to form the closure assembly by induction welding, and during the step of inductively heating, shaping the portion of at least the second periphery with the lip providing cooling coils in the obliquely oriented lip adjacent to the portion of the periphery of the second surface within which the portion of the periphery of the first surface is nested.