Patent ID: 8920587
Filing Date: 2014-12-30
Classification: B29C,B29K,F16L,Y10T

Abstract:
1. A method of forming a composite tube comprising: placing a slip sheet on a work surface; placing a composite sheet on the slip sheet; placing a mandrel at a first edge of the composite sheet; folding a portion of the slip sheet over the mandrel and the first edge of the composite sheet to enclose the mandrel and the first edge of the composite sheet therein; placing a compression bar on the folded-over portion of slip sheet and applying force to the compression bar, such that the slip sheet contacts the mandrel; and pulling the folded-over portion of the slip sheet away from the mandrel, while maintaining force on the compression bar, so as to wind a portion of the composite sheet around the mandrel, wherein the compression bar comprises an angle extrusion having a corner and two edges, each extending along a length of the compression bar, and wherein placing a compression bar on the folded-over portion of the slip sheet comprises contacting the slip sheet with the two edges.