Patent ID: 6220564
Filing Date: 2001-04-24
Classification: E04C,E04G

Abstract:
A concrete column forming tube comprising an in-use circular configurated body of cardboard construction material having plural longitudinally oriented folds in circumferentially spaced relation thereabout operatively effective to impart said in-use circular configuration incident to unfolding of said folds, a non-use flat configuration of said body prior to said unfolding of said folds consisting of opposite front and rear walls bounding a compartment therebetween and a delimited minimal thickness in said body contributing to a compact storage condition thereof, at least one ring of metal construction material of a selected diameter approximately equal to a diameter of said circular configurated body, and hinge means attaching said ring in said compartment with a pivotal traversing degree of movement, whereby the urging of said ring in a pivotal traverse reshapes said body from its flat storage condition to its circular in-use condition.