GB658546A - Improvements in sliver roll formers - Google Patents

Abstract

658,546. Sliver roll forming machines. FRASER & SONS, Ltd., D., and FRASER, H. March 21, 1949, No. 7569. [Class 120(i)] In a sliver-roll-forming machine having an endwise withdrawable arbor or pair of half-arbors provided with protruding pins or pin-like elements to engage the sliver, the pins or pin-like elements are individually set helically, i.e. skew to the axis of the arbor or half-arbor, their pointed ends being directed towards that end of the arbor or half-arbor last to emerge from the roll on withdrawal. As shown, Fig. 3, pins 1<1> are fitted at the larger ends of the halfarbors 2<1> of a machine of the type described in Specification 398,617, so as to point forwardly with respect to the direction of rotation; at commencement of winding the sliver passing between driver 6 and arbors 2<1> is arrested by an abutment 8, causing pins 1<1> to dig into the sliver. Pins may be similarly arranged. on the halfarbors of a machine of the type described in Specification 588,935, the arbors being initially driven with a surface speed slightly greater than the speed of travel of the sliver; or the pins may be orientated with their pointed ends trailing, the arbors then being driven at a lower surface speed than that of the sliver. A single arbor, Fig. 6, may be fitted with two sets of pins 11, 12. Instead of pins, spiked or serrated steel strips may be fixed to half-arbors. According to the Provisional Specification, the driver may be grooved to clear the pins.