Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Producing multilayer work or article
Reexamination Certificate
2005-06-28
2005-06-28
Staicovici, Stefan (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Producing multilayer work or article
C264S511000, C264S248000, C264S255000, C264S257000, C264S258000, C264S137000, C156S286000, C156S289000, C156S309600, C156S382000
Reexamination Certificate
active
06911175
ABSTRACT:
A method provides for full or partial infusion of resin into three-dimensional, woven textile preforms. Resin film is placed at selected locations adjacent the preform, and the resin film may be separated from other areas of the preform using separator sheets or other materials. The preform is heated and may be vacuum-bagged to apply pressure, or may be rolled or fed through a die. The heat and pressure cause the resin to infuse into the selected areas of the preform adjacent the resin films. The amount of resin in the partial infusion is the same as is necessary to fully infuse the preform, but the resin remains localized in the selected areas until heated again at cure to cause the resin to flow throughout the preform. The method may also be used to fully infuse the preform with resin by providing sufficient temperature and time at that temperature during the initial infusion.
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U.S. Appl. No. 09/898,633, filed Jul. 2, 2001, Inventor: Ronald P. Schmidt.
Benson Ross A.
Bersuch Larry R.
Miller Harry R.
Repecka Linas
Schmidt Ronald P.
Bracewell & Giuliani LLP
Lockheed Martin Corporation
Staicovici Stefan
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