GB935480A - Improvements relating to web punching or needling machines - Google Patents

Abstract

935,480. Needling-machines. WILLIAM BYWATER Ltd., and B. O'BYRNE. May 2, 1962 [May 2, 1961], No. 15792/61. Class 42 (2). A needling machine comprises means to displace a part of the web W between the needle bed 1 and a continuously rotating draw roller 12 so that when the needles 3 are withdrawn the web can be drawn across the bed 1 faster than the roller 12 takes it up so that a surplus length of web is wound on to or passes around the roller 12 whilst the part of the web being needled remains stationary. The needles 3 operate through a stripper plate 2 and are mounted on a needle board 4 carried by a needle arm 5 reciprocated vertically by at least two crank arms 6 whose upper ends are eccentrically mounted on a drive-shaft 7. The roller 12 upon which or over which the web W is wound or passes is driven by a motor 8 and may have a pressure roller 13 co-operating therewith. A shaft 19 is driven at half the speed of the shaft 7 by the linkage shown. An arm 20 is secured near each end of the shaft 19 and carries the ends of two freely rotatable rollers 21 or rods or a series of rollers extending the width of the web to periodically contact and elevate the web. When the needles 3 are withdrawn a roller 21 elevates the web from the position W2 to the position W1 so that the slack part of the web is taken up by the roller 12 whilst needling takes place. In a modification, Fig. 4, the web is displaced by a freely rotatable roller 31 mounted between levers 33 pivoted at 34 and connected at their other ends by links 35 to rotatable eccentric devices 36 driven by the shaft 7. In further modifications (not shown) the web is elevated by a rail or free roller which reciprocates vertically or is taken around a system of rollers or rods which are reciprocated or moved relative to each other. The invention may also be applied to machines using upward needling.