The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 1999
Filed:
Oct. 04, 1993
Robert D Bacon, Jr, Hartsville, SC (US);
Arnold B Floyd, Jr, Hartsville, SC (US);
Troy W Johnson, Jr, Hartsville, SC (US);
James R Martin, Hartsville, SC (US);
Honor S Bonds, Florence, SC (US);
John F Whitehead, Hartsville, SC (US);
Wim van de Camp, Meerssen, NL;
Sonoco Products Company, Hartsville, SC (US);
Abstract
A concrete column forming tube and method of making same for receiving poured concrete column therein to produce a concrete column is characterized by a smooth inside coated surface in the forming tube to eliminate spiral seam lines and other undesirable characteristics on the outside surface of the formed concrete column. The tube is formed from spirally-wound plies of paper adhered together and has a centrifugally-cast epoxy resin coating sprayed onto the inside surface of the spirally-wound tube while the tube is rotating to produce a smooth inside coated surface on the forming tube.