Stone working – Splitting – shearing – and punching
Patent
1978-05-15
1980-01-22
Whitehead, Harold D.
Stone working
Splitting, shearing, and punching
51235, 83152, 83870, 269 21, B28D 132
Patent
active
041844726
ABSTRACT:
A crystal is sliced in a plane parallel to flat, opposed parallel end faces of the crystal. The end faces of the crystal are gripped by a pair of opposed, perforated platens of a pair of vacuum chambers, one of which is translatable relative to the other. A blade cuts the crystal through the desired plane. A spring biases one of the vacuum chambers away from the other vacuum chamber while both of the faces are gripped by the vacuum chambers and the blade is cleaving the crystal. Thereby, a sliced portion of the crystal gripped by one of the vacuum chambers is pulled away from the remainder of the crystal gripped by the second vacuum chamber when the crystal has been cleaved by the blade through the plane.
REFERENCES:
patent: 1872415 (1932-08-01), Growley
patent: 2597180 (1952-05-01), Reaser
patent: 3901423 (1975-08-01), Hillberry
Benedicto John S. J.
Hallberg Frederick C.
Woodgate Bruce E.
Manning John R.
Marchant Robert D.
The United States of America as represented by the Administrator
Tresansky John O.
Whitehead Harold D.
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