Static molds – In situ construction engineering type or building type-mold... – Forming building structure
Reexamination Certificate
2000-03-13
2001-04-24
Canfield, Robert (Department: 3635)
Static molds
In situ construction engineering type or building type-mold...
Forming building structure
C249S051000, C249S188000, C052S749100, C052S742100, C052S745180, C229S004500, C229S093000
Reexamination Certificate
active
06220564
ABSTRACT:
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. 12, 1994. In the '142 patent, the cardboard construction material in strip form is helically wound on a mandrel-like roller, shipped in such condition presumably to a site of use, and then unwound preparatory to being constructed into a three dimensional concrete molding configuration.
In the '142 patent and in all other known patents, in respect to the non-use condition of the forming tube at a site of sales, a very significant location and occurrence in the travel of trade of the product from a manufacturer to the ultimate consumer, said non-use condition does not adequately display the product with a consumer cognitive appreciation of its ultimate utility in the construction process. The helically wound strip of cardboard put up on supply roll of the '142 is a case in point.
Broadly, it is an object to provide a concrete column forming tube overcoming the foregoing and other shortcomings of the prior art.
More particularly, it is an object to embody a concrete column forming tube of cardboard construction material with a flat configuration in non-use, and readily reshaped, using folds, an expedient of choice of cardboard constructed articles of manufacture, into an effective three dimensional configuration, by the mere unfolding of the folds, at a site of use, all as will be better understood as the description proceeds.
REFERENCES:
patent: 1060304 (1913-04-01), Woodley
patent: 2194833 (1940-12-01), Hart, Jr. et al.
patent: 2491213 (1949-12-01), Robinson, Jr.
patent: 2670129 (1954-02-01), Baxter et al.
patent: 4846394 (1989-07-01), Swanson
patent: 5328142 (1994-07-01), Weekers
Canfield Robert
Myron Amer PC
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