Apparatus for the production of concrete paving stones

Plastic article or earthenware shaping or treating: apparatus – Sets of male-female press molds

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425412, 52603, B28B 306

Patent

active

055975917

ABSTRACT:
An apparatus for the production of concrete paving stones, including an open top mold having a number of die cavities each with adjoining recesses, wherein the free volume of the recesses is reduced by local cross-sectional constrictions at the upper filling-in region of the recesses. Also included is a pressure ram for cooperation with each die cavity, the pressure ram having lateral projections each with a contour corresponding to the cross-section of the recesses at the constriction for entering into the recesses.

REFERENCES:
patent: 1030591 (1912-06-01), Latulip
patent: 2499530 (1950-03-01), Scott
patent: 2624928 (1953-01-01), Long
patent: 4732600 (1988-03-01), Schiller
patent: 4875803 (1989-10-01), Scales

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