Concrete column forming tube

DETAILED DESCRIPTION What is claimed is: 1.
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.




Description:
The present invention relates to improvements for a concrete column forming tube, the improvements more particularly facilitating the reshaping of the flat tub from a convenient-to-handle non-use condition into a three dimensional configuration as required at a construction site to achieve the end purposes intended.
Example of the Prior Art In the construction art, in which concrete is poured into a circular void of a column forming tube to produce, after the concrete cures, a support for a concrete floor, outdoor porch or patio or the like, that a rigid tube bounding the shape-imparting void is not a handling problem at the site of use.
However, at a site of sale, or in warehouse storage, the three dimensional tube size, typically 48 inches long and 13 inches in diameter, takes up valuable space, as well as complicating transit from a remote site to the site of use location.
Solutions addressing the problem abound in the patent literature, as exemplified by U.
S.
Pat.
No.
5,328,142 for Concrete Column Forming Tube issued to Weekers on Jul