Concrete forming apparatus and method of manufacturing same

Details Concrete forming apparatus and method of manufacturing same Concrete forming apparatus and method of manufacturing same

E - Fixed Constructions

04

G

72/105

E04G 13/02 (2006.01)

Patent

CA 1217949

ABSTRACT The present invention relates to a disposable concrete forming apparatus. The apparatus includes an elongate, tubu- lar and rigid form having at least one inner wall surface defining an enclosure in which concrete can be poured and allowed to harden. The apparatus further includes a flexible liner of predetermined thickness which lines the inner sur- face to preclude formation of form lines on the hardened con- crete that correspond to markings on the inner wall surface of the rigid form. The flexible liner has at least one out- side wall surface for each inner wall surface and is movable between a compressed position permitting insertion of the liner into the enclosure and a normal expanded position with the outside wall surface pressing against the inner wall sur- face of the rigid form. As a result, no gap is present be- tween the inner wall surface and the outer wall surface.

447831

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