Preform for manufacturing a material
having a plurality of voids and
method of making the same
| United States Patent |
6,767,619
|
| issued |
July 27, 2004
|
| Inventors: |
Owens; Charles R.
|
| Appl. No.: |
09/860,349
|
| Filed: |
May 17, 2001
|
| Intl. Cl.: |
B29C 065/00; B32B 003/26 |
| Current U.S. Cl.: |
428/304.4; 264/41 |
| Field of Search: |
- |
Primary Examiner: Chang; Victor S.
Attorney: MINTZ, LEVIN, COHN, FERRIS, GLOVSKY AND POPEO, P.C.
Abstract
A beaded preform includes a plurality of adjacently positioned beads for forming a plurality of voids in an engineered material. The beaded preforms may be comprised of a filaments (single strand of beads) and mats (two-dimensional and three dimensional arrays of beads). The filaments and mats may be coated to become tows and laminates, respectively, which may then be assembled into composite materials. The preforms may be produced using novel manufacturing apparatuses and methods, and incorporated into known manufacturing processes to produce porous structures, including stress-steering structures, in any material including metals, plastics, ceramics, textiles, papers, and biological materials, for example.
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