Stock material or miscellaneous articles – Perimeter or corner structure of sheet
Reexamination Certificate
2005-08-02
2005-08-02
Cole, Elizabeth M. (Department: 1771)
Stock material or miscellaneous articles
Perimeter or corner structure of sheet
C428S192000, C428S131000, C428S292100, C428S300700
Reexamination Certificate
active
06924021
ABSTRACT:
A complex-shaped carbon fiber structural member including a multiplicity of carbon epoxy fiber bundles surrounded by a unidirectional carbon fiber rope and its method of manufacture are provided. The fiber bundles are formed from large sheets of unidirectional carbon fiber materials cut into small strips, with the strips then being randomly oriented in the form of a sheet of randomized fiber bundles. The strips, and the fibers in the strips, cross over one another so as to form a layer of material that has a relatively uniform strength in all directions. The sheets of randomized carbon epoxy fiber bundles are cut into preforms for the structural part being made. Several preforms are stacked on top of each other in order to provide material to make the part of a desired thickness. To reinforce the bundles within the part, particularly along its outer periphery, the preforms are wrapped prior to molding with an elongated rope of unidirectional carbon fibers. The preforms and unidirectional rope are assembled together in an appropriate mold, which is then subject to heat and pressure for molding and curving the part.
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Colegrove James E.
Cusack Doug A.
Manuell Chad
Boyle James F.
Boyle Fredrickson Newholm Stein & Gratz S.C.
Cole Elizabeth M.
Trek Bicycle Corporation
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