Method of manufacturing articles from a composite material
Patent 4562033 Issued on December 31, 1985. Estimated Expiration Date: 
June 21, 2003. 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.
June 21, 2003. 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 3575756 3666600 Composite lamination method Resin impregnation process Method of laminating plastic sheets Patent #: 4350545 InventorsAssigneeApplicationNo. 06/506422 filed on 06/21/1983US Classes:264/510, Producing multilayer work or article156/286, To remove gas from between assembled laminae264/102To degas or prevent gas entrapmentExaminersPrimary: Silbaugh, Jan H.Attorney, Agent or FirmInternational ClassesB29C 37/00 (20060101)B29C 70/04 (20060101) B29C 70/34 (20060101) B29C 43/10 (20060101) B29C 43/12 (20060101) Foreign Application Priority Data1982-07-24 GBAbstractA method of vacuum moulding a composite material in which laid-up prepregs uncured resin and reinforcing filaments are placed on a heated former and covered with a sheet of a microporous film material a breather material and an impermeable membrane. The volume enclosed by the membrane is evacuated and the temperature of the mould increased to firstly outgas the resin and mould the prepregs to the shape of the former and finally cure the resin. The arrangement ensures excellent access of the prepregs to the vacuum during the moulding operation, thereby in turn ensuring that the resultant moulded article has very low porosity as a result of gas or vapor inclusions or is porosity-free. | |
