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US 4,398,878 AGranted
Apparatus for making shaped concrete articles
AssigneeBr. Perssons Cementvarufabrik AB
InventorBengt Persson
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AssigneeBr. Perssons Cementvarufabrik AB
InventorBengt Persson
Estimating the term…
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.
An apparatus for adjusting the dimensions and shape of an elongated article molded from concrete in a mold, comprising a support surface for the article, a straight-edge rule, means for moving said support surface towards and from said straight-edge rule, a first and a second pressing plate adjacent respectively a first and a second end of said straight-edge rule and movable in the longitudinal direction of the rule, and a member profiled to the shape desired of the finished concrete article, movable in a direction parallel to the longitudinal direction of the rule, and arranged to contact at least a side surface of the article remote from the rule.
An apparatus for adjusting the dimensions and shape of an elongated article molded from concrete before the article has hardened comprising a support surface, a straight-edge rule, means for moving one of said support surface and said straight-edge rule relative to the other to bring said support surface and said straight-edge rule to an abutting relationship, pressing plates adjacent opposite ends of said rule, means for moving said pressing plates into contact with opposite end surfaces of the article, a profiled member, and means for moving said profiled member in a direction substantially parallel with the longitudinal direction of the rule and in contact with at least one side surface of the article remote from said rule.
An apparatus for adjusting the dimensions and shape of an elongated article molded from concrete before hardening of the concrete, comprising infeed supports and outfeed supports for carrying the article, the outfeed supports being at a lower level than the infeed supports;
Dependencies are inferred from the claim text.