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    • 79. 发明专利
    • Improvements in or relating to the Manufacture of Rubber Goods, and the like.
    • GB103692A
    • 1917-02-05
    • GB175916
    • 1916-02-05
    • SLOPER THOMAS
    • SLOPER THOMAS
    • B29D22/02
    • 103,692. Sloper, T. Feb. 5, 1916. Vucanizi n g , cores for; vulcanizing in flexible envelopes. - Tapered a i r chamber sections D, more particularly for use with aircraft, such as are described in Specifications 21863/13 and 25605/13, [Class 140, Waterproof &c. fabrics], and made of cords or canvas coated or permeated w i t h rubber or of material treated with oil compounds &c., are built up on a former A and, before being vulcanized or allowed to set, have an envelope U stretched tightly over them. A binding G is then secured over the envelope for the purpose of applying pressure to the article during vulcanizing or setting. The envelope C may be in the form of a truncated cone, in which case pressure is applied to the end by means of a cap E, to which a flange E may be secured for the purpose of holding the binding. The envelope, which itself may be formed upon the former from canvas having an interior surface of vulcanized rubber, may be stretched by means of hooks F carried by a disk or spider F . The Provisional Specification refers also to making rubber-goods in general and not necessarily conical.