B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
25/79
B28B 11/08 (2006.01) B28B 11/00 (2006.01)
Patent
CA 1144349
A B S T R A C T Method and apparatus for adjusting the shape and dimensions of an elongated vibrated concrete article made in a mould after removal of the article from the mold. Before hardening, the article is brought to engage with its one long side a straight-edge rule to be shaped thereby. The end surfaces of the article are pressed to obtain a pre- determined length of the article and the cross sectional shape of the article is adjusted to agree with the intended shape while keeping the article in engagement with the rule while maintaining pressure at the ends of the article. The adjustment of the shape thus takes place without subjecting the major part of the concrete mass to undue stresses with the result that the strength of the finished and dried article is improved.
346753
Gowling Lafleur Henderson Llp
Perssons (br.) Cementvarufabrik Ab
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