Method for forming rigid composite preforms
Patent 4741873 Issued on May 3, 1988. Estimated Expiration Date: 
April 15, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 15, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3415919 3444025 3466210 3728423 3779851 3914395 Carbon fiber composites Electromotive brushes produced from mesophase pitch fibers Method for preparing metallated filament-wound structures Method for making shaped carbon fiber structures InventorsAssigneeApplicationNo. 06/852066 filed on 04/15/1986US Classes:264/103, WITH TWINING, PLYING, BRAIDING, OR TEXTILE FABRIC FORMATION156/148, With weaving, knitting, braiding, twisting or needling264/136, Impregnation of batt, sheet, or filament264/137, Heat settable impregnant264/258, Joining a plurality of superposed fibrous or textile layers264/29.5, With carbonizing, then adding carbonizable material and recarbonizing264/324, Woven or felted sheet-form work57/362, Processes87/6Tubular fabric with coreExaminersPrimary: Thurlow, JefferyAttorney, Agent or FirmInternational ClassesB29B 15/10 (20060101)B29B 11/14 (20060101) B29B 11/16 (20060101) B29C 70/16 (20060101) B29C 70/10 (20060101) B29C 35/08 (20060101) B29C 35/04 (20060101) AbstractRigidized composite preforms are fabricated by first serving individual reinforcement strands with a thread of a thermoplastic material. After shaping the reinforcement strands into a desired geometry, the shaped strands are heated to melt the thermoplastic threads. By then cooling the shaped reinforcement strands, the thermoplastic material solidifies and acts as an adhesive or glue in holding the preform together in a rigid fashion. Such rigid preforms are particularly suitable for handling, storage and transportation to other locations and media prior to densification. Densification may be performed by conventional techniques to produce the final composite article. Pyrolysis of the matrices and subsequent densification of the matrix may be accomplished.Field of SearchHeat settable impregnantImpregnation of batt, sheet, or filament WITH TWINING, PLYING, BRAIDING, OR TEXTILE FABRIC FORMATION CARBONIZING TO FORM ARTICLE Filaments Agglomeration or accretion From cellulosic material With carbonizing, then adding carbonizable material and recarbonizing In specific atmosphere (except vacuum or air) Controlling varying temperature or plural heating steps Joining a plurality of superposed fibrous or textile layers | |
