Patent ID: 9480887
Filing Date: 2016-11-01
CPC Classification: A63B,B21D,B21J,Y10T

Claim Text:
1. A method of forming a striking face of a golf club head comprising: placing a pre-form face insert between a top punch and a bottom cavity; said top punch having a protrusion and said bottom cavity having a depression, compressing said top punch against said bottom cavity to alter a shape of said pre-form face insert to create a substantially non-planar rear surface; and machining off excess material from a top punch side of said pre-form face insert to create a substantially planar frontal surface; wherein said substantially non-planar rear surface of said pre-form face insert has a non-symmetrical shape about its vertical dividing line, said vertical dividing line defined as a line drawn vertically through the crown and sole portion of said face insert passing through a face center.