Paperboard tube concrete forms

Details Paperboard tube concrete forms Paperboard tube concrete forms

1977-11-14

1979-04-03

Silverberg, Sam

Coating processes

Mold coating

264338, 427411, 427285, B28B 734, B28B 738

Patent

active

041478185

ABSTRACT:
A paperboard tube for use in forming concrete columns is split longitudinally into two parts, with each part initially having its cut edges treated with a urethane resin, with each part then being dipped into a solution of an acrylic resin, and finally each part then having its interior surfaces coated with a urethane resin, each part is then assembled into a composite tube, and when used, having a reinforcing member arranged along the length of its longitudinal slits, for reinforcement of the tube edges, and finally a strap(s) or clamp(s) is arranged therearound so as to secure the tube into position for use in the pouring of concrete columns.

REFERENCES:
patent: 3030249 (1962-04-01), Schollenberger
patent: 3650795 (1972-03-01), Wellingham
patent: 3808299 (1974-04-01), Svensson
patent: 4055322 (1977-10-01), Cassidy

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