. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. strong cylindrical mould of metal, into which a metallicplunger descends, which forces the caoutchouc to take the form of a flat cylinder with acircular base. The mould is plunged into hot water during the compression. A stem orrod of iron, which goes across the hollow mould and piston, retains the latter in its place,notwithstanding the resilience of the caoutchouc, when the mould is taken from the mould being then cooled in water, the caoutchouc is withdrawn. The transfo
. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. strong cylindrical mould of metal, into which a metallicplunger descends, which forces the caoutchouc to take the form of a flat cylinder with acircular base. The mould is plunged into hot water during the compression. A stem orrod of iron, which goes across the hollow mould and piston, retains the latter in its place,notwithstanding the resilience of the caoutchouc, when the mould is taken from the mould being then cooled in water, the caoutchouc is withdrawn. The transformation of the disc of caoutchouc into fine threads is performed by twomachines; the first of which cuts it into a riband of equal thickness in its whole extent,running in a spiral direction from the circumference to the centre; the second subdi-vides this riband lengthwise into several parallel filaments much narrower but equallythick. The followmg fgs. 3G6, 367, 368, represent the machine for cutting the spiral disc d, placed horizontally, turns round its vertical axis, so as to present its 366.
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Keywords: ., bookcentury1800, bookdecade1840, booksubje, booksubjecttechnology
