GB191229485A - Improvements in and relating to the Making of Expanded Metal. - Google Patents

Abstract

29,485. Chess, H. B. Dec. 21. Expanding and stretching; bending-dies; cutting expanded-metal.-In making expanded metal, the strands formed by rows of alternately spaced interrupted slits, are all simultaneously stretched longitudinally by pressing in a direction transverse to the plane of the sheet before the sheet is completed by lateral expansion. In the form shown, in which intermediate unexpanded ribs k, Fig. 10, are also formed, the adjoining strands are alternately bent and elongated to form the portions e, e<1> and intermediate inclined portions j<1>, Fig. 12, by complementary dies having scalloped edges f<1>, g<1>, Fig. 11, and intermediate bevelled faces f<2>, g<2>. The slitting and stretching may be effected simultaneously or in successive operations. The lateral expansion when ribbed metal is being made may be effected by the forming of the ribs between the dies o, p.