Patent GB-422913-A (GB)
Title: Improvements in looms for weaving double pile or like tufted fabrics
IPC: D03D39/02
Filed: 1933-06-22
Abstract: 422,913. Looms for weaving tufted pile fabrics. SHUTTLEWORTH, A. W., Amsterdam, New York, U.S.A. June 22, 1933, No. 17815. Convention date, June 23, 1932. [Class 142 (ii)] Two or more fabrics or plies, looms specially designed for ; shuttleless looms.-Two Axminster or like tufted pile fabrics are woven simultaneously and face-to-face in a loom provided with means for introducing a set of tuft yarns between the threads of two superposed sets of warps, a double weft inserting needle for introducing two picks simultaneously and a pair of selvage shuttles co-operating therewith, and an upper and lower comb for bending the ends of the tufts about the upper and lower wefts. The portions of the tufts connecting the two fabrics may be cut in the loom or after removal therefrom. Binder warps 13...16, Fig. 13, and stuffer warps 22, 23 supplied from two beams at the rear of the loom are led through two sets of healds and formed into two superposed sheds by means of cams on the shaft 39 of the loom. Three wefts per row of tufts are inserted by two superposed needles 40, 41 associated with a common connecting rod 48<a>, Fig. 3, which is operated by cranks on a shaft 48 driven by gearing from the shaft 39, and the wefts are beaten-up by a reed 79 the supporting lay of which is rocked by a cam on the main shaft. Selvedges, forming and protecting. The selvedge threads are passed through the loops of weft by two superposed shuttles 51, 52, Fig. 5, which are reciprocated along a curved race 53 by a cam operated arm 57, having depending driving arms 56, 64, the return movement of the lower shuttle being effected by means of a projection 55 on the base of the shuttle 51. In a modified construction the depending driving limbs are arranged to engage the upper shuttle only, and the lower shuttle is reciprocated by means of projections on the shuttle 51. Tuft yarns, supplying and inserting. The tuft yarns are supplied from tube frames 83 which are advanced to the weaving point and inserted between the threads of both sets of warps by an intermittently rotated sprocket 68 and rocking arms 70 of standard construction, the subsequent insertion of wefts by needles 40, 41 and operation of the reed permitting withdrawal of the tube frame and cutting of the tufts by means of adjustably mounted knives 84, 85. Two combs 107, 108, mounted above and below two breast plates 105, 103, against which the upper and lower fabrics bear, are then moved towards the fabrics to bend the free ends of the tufts around the upper and lower wefts after which the rest of the picks are inserted to hold the tufts in position. The combs 107, 108 are advanced to the point of insertion of the tufts by means of a main shaft cam 116 which is operatively connected by rods 111, 110 to a rock-shaft 109, the latter in turn supporting the bottom comb levers 119, 121 and being connected by arms 134, 135 and shaft 136 to the upper comb supporting levers 139, 141. The necessary vertical movements for bending the tufts around the wefts are imparted to each comb independently, the upper comb having a link 143 connected through a bell-crank lever 144-147, to a cam operated rod 148, and the lower comb having a similar connection with a cam operated lever 125. Arms 118, 146 are provided to limit the backward movement of the combs. Cutting pile tufts. The pile yarn extending between and connecting the two fabrics is cut by an adjustably supported knife 156 which is reciprocated transversely by a cable 159 secured to a drum 162, Fig. 3, which is oscillated by a gear segment 165 operatively connected to shaft 48. Take-up motions. After cutting, the upper and lower pile fabrics are withdrawn from the loom and fed to takeup rolls (not shown) by spike rollers 170, 173, which are geared to each other and to a toothed wheel 177 associated with a ratchet 178, which is advanced intermittently by a pawl 179 operatively connected to the lay. A stop pawl 186 is provided. Breast beams. The upper breast plate 105, against which the upper fabric bears, is formed integrally with a breast beam 105<a>, which is adjustably mounted on the lower breast beam 99.