Golf putter head

Abstract

A synthetic ruby putter head is produced from a cylindrical round boule sliced into pieces. A round inside diameter diamond saw performs the cutting operation. Each resulting disc piece is temporarily cemented to a steel parallel round plate and is Blanchard ground with a rotary surface grinder having a fine diamond wheel to remove the slicing irregularities on both sides and to establish a fixed thickness for all the pieces. Thereafter, the pieces are fine ground and polished to bring out the color of the synthetic ruby and a hole is drilled into the top surface of the disc by a diamond tool and a putting shaft is inserted therein and held in place with an epoxy adhesive. The putter has a flatness on the putter face measured in light waves using a zygo interferometer that can measure flatness of 1/10 of the wavelength at 632.8 nm. The synthetic ruby putter face is polished flat to 1/4 of a wavelength or better at 632.8 nm across one inch of the putter face.

Dependencies are inferred from the claim text.