Process for making a curved PI shaped preform made from...

Details Process for making a curved PI shaped preform made from... Process for making a curved PI shaped preform made from...

2006-03-21

2006-03-21

Staicovici, Stefan (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

C264S257000, C264S258000, C264S291000, C264S324000

Reexamination Certificate

active

07014805

ABSTRACT:
The invention is a process for forming a 3D woven PI shaped cross-section preform having a first and second bottom foot portions and first and second upstanding leg portions for use in a structure having at least one curved portion of a specific length. In detail, the process includes the steps of: 1) cutting the treads parallel to the direction of curvature into over a length equal to the length, such that the cuts in each thread are spaced from the cuts in the adjacent treads; 2) stretching the portions of the preform requiring curvature; and 3) forming the curvature in the preform.

REFERENCES:
patent: 6007319 (1999-12-01), Jacobson
patent: 6446675 (2002-09-01), Goering
patent: 6520706 (2003-02-01), McKague, Jr. et al.
patent: 6553734 (2003-04-01), McKague, Jr. et al.
patent: WO 01/64387 (2001-07-01), None

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