Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Surface deformation means only
Patent
1981-04-17
1983-08-16
Parrish, John A.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Surface deformation means only
425397, 425403, 425441, 425442, B28B 1300
Patent
active
043988784
ABSTRACT:
An apparatus for adjusting the tolerances regarding the shape and dimensions of an elongated vibrated concrete article made in a mold after removing the article from the mold, making it possible to achieve close tolerances even when using a rather wet concrete composition optimized as regards strength. According to the invention, the article, before hardening, is brought into engagement with one long side of a straight-edge rule for being shaped thereby, the article is pressed on its end surfaces to a predetermined length, and the cross-sectional shape of the article is adjusted to agree with the intended cross-sectional shape while keeping the article in engagement with the rule and pressing it on the end surfaces.
REFERENCES:
patent: 2974360 (1961-03-01), Giles
patent: 2997281 (1961-08-01), Remington
patent: 3767348 (1973-10-01), Perkins
patent: 4247269 (1981-01-01), Bezhanov
Br Perssons Cementvarufabrik AB
Parrish John A.
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