Perforated containers and method of producing them

摘要

951,788. Moulding perforated containers. AEROJETGENERAL CORPORATION. Aug. 8, 1960, No. 27394/60. Heading B5A. [Also in Divisions F1 and F3] An igniter basket for rockets is made by helically winding resin impregnated glass or metal fibres 13 on a low-melting point alloy core in opposite directions to leave spaces in which apertures are formed by projections 18 on the core. The core which may be in two parts is cast in a polyvinyl chloride mould made by moulding around a master steel core.