Apparatus for modifying building blocks

Details Apparatus for modifying building blocks Apparatus for modifying building blocks

1986-01-13

1987-09-08

Whitehead, Harold D.

Stone working

Dressing

Rotary cutter

29563, 408 44, 51 80A, B28D 118

Patent

active

046916849

ABSTRACT:
Apparatus for modifying building blocks which vary somewhat in size to provide spaced-apart depressions in the top and bottom surfaces thereof with the bottoms of the depression in the bottom surface being at a uniform distance from the top surface of the blocks comprises groove cutting and associated block drilling means. The drilling includes movable plates carrying a plurality of drills, means to move one of the plates before the other, and means to position the blocks for proper drilling. Also, a plurality of cutters are used to speed the cutting operation.

REFERENCES:
patent: 790823 (1905-09-01), Garfield
patent: 1863839 (1932-06-01), Duff
patent: 2187299 (1940-01-01), Burkhardt
patent: 3213510 (1965-10-01), Mizer
patent: 3298097 (1967-01-01), Gilbert
patent: 3918210 (1975-11-01), Mori
patent: 3918825 (1975-11-01), Alberti
patent: 4256078 (1981-03-01), Whitty

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