Device for breaking a glass plate so as to obtain a sharp edge

Details Device for breaking a glass plate so as to obtain a sharp edge Device for breaking a glass plate so as to obtain a sharp edge

1979-06-26

1981-03-17

Yost, Frank T.

Severing by tearing or breaking

Breaking or tearing apparatus

Movable breaking tool

225 965, C03B 3302

Patent

active

042562465

ABSTRACT:
Apparatus for making glass knives for cutting specimens for viewing by optical microscopes from thin glass plates comprises the use of a breaking rule bearing against one side of a plate, at least two breaking knobs bearing against the other side of the plate on opposite sides of the breaking rule, and a scribing device arranged between the knobs to prepare a scribing line in the plate parallel with the breaking rule, the breaking rule being displaceable with respect to the scribing line to control the edge angle of the resulting knife.

REFERENCES:
patent: 3207398 (1965-09-01), Forsstrom et al.
patent: 3371833 (1968-03-01), Sutton
patent: 3494521 (1970-02-01), Hellstrom
patent: 3562803 (1971-02-01), Townsend
patent: 3819096 (1974-06-01), Pyper
patent: 3908878 (1975-09-01), Blum
patent: 4175684 (1979-11-01), Butler

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