GB486925A - New or improved method of expanding fabrics and apparatus therefor - Google Patents

Abstract

486,925. Loom temples. WRIGLEY, J. H., MELVILLE, A., and KELLETT, S. Dec. 9, 1936, No. 33752. [Class 142 (ii)] [Also in Group XVI] A device for expanding fabrics which is applicable in connection with temples for looms, is constructed so that the fabric is led over a continuous surface constituted by a sleeve or band 3 of resilient material, such as rubber, which is moved or capable of moving therewith, and is extended laterally during the leading of the fabric thereover by a force applied to it substantially normal to its surface. The sleeve 3 is mounted on a metal or other hard core or shaft 1, Fig. 1, provided with inclined faces 2, preferably covered with material resistant to liquids or vapours, and the sleeve is also formed with inclined faces 4 preferably of a hard material such as vulcanite. To facilitate the sliding of the inclined faces 4 on the faces 2, the core is slit into segments. The inclined faces slope in opposite directions on each side of the centre of the shaft 1. The ends of the sleeve are sealed by a rubber cap 5, Fig. 1, or may be secured to inclined rings 25, Fig. 12, rotating on inclined bearings 24 on the shaft 1. The expander is preferably used in conjunction with a pressure roller acting over the whole length of the roller, or on the ends only of the roller, or the pressure producing expansion of the sleeve may be produced by the web alone. In a modification, Fig. 4, the sleeve may be connected to the shaft 1 by means of a series of inclined springy rings 8 split into segments, the inclination of the ring segments decreasing from the middle of the ring to the ends of the core so as to cause progressive expansion. The centre of the core has a rubber filling 28. The expansion of the sleeve 3 is arranged to increase progressively in the direction of expansion by arranging the spacing between any pair of inclined faces on the sleeve to be less than the spacing between the corresponding pair of inclined faces on the core, and that the inclination of the foces to the axis of the core decreases towards the ends of the core and sleeve. The inclined faces may be of ring or helical form.