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US 4,740,345 AGranted
Method for producing an iron golf club head
AssigneeNippon Gakki Seizo Kabushiki Kaisha
InventorsYoichi Nagasaki, Toyohiko Tadokoro, Tatsuo Nakanishi, Masaki Fujimura
Life of this patent
Estimating the term…
Abstract
In production of a composite type iron golf club head having a FRP (fiber reinforced plastic) backing in a rear recess, a peripheral flange to be caught by the main body is formed on the FRP backing by providing a bottom peripheral groove in the rear recess for fortified bonding of the FRP backing to the main body.
Claims7
Method for producing an iron golf club head comprising the steps of
- forming a metallic main body having a rear recess in the surface opposite to the face side of said metallic main body and a peripheral groove surrounding the bottom of said rear recess,
- filling easily deformable crude resin containing reinforcing fiberous material into said recess and peripheral groove, and
- hardening said crude resin by application of heat under pressure.
Dependencies are inferred from the claim text.