Patent GB-190713467-A (GB)
Title: Window Shade Machine.
Inventor: FAIRWEATHER WALLACE
Filed: 1907-06-11
Granted: 1908-06-11
Abstract: 13,467. Fairweather, W., [Patton, J. B.]. June 11. Nailing.-In a machine for making roller blinds, the fabric is fed from a roll, cut to any required width, hemmed along the longitudinal edges, and cut transversely to any required length, and the rear end of each length is folded and creased to form a loop for the lath, while the other end is tacked or nailed to a roller, upon which the fabric is then wound. From the creasing-device, the fabric pasess over plates 183, Figs. 2 and 6, into position to be fastened to the blind-roller 94, which is removably supported by a spring-pressed centering-device 184, Fig. 5, slidably held in a bearing 185. which is adjustable along a support or slide 186. A chuck 187 supports the other end of the blind-roller, and is adapted to rotate the roller after the fabric has been fastened thereto, in order to wind the fabric upon the roller. The chuckshaft 188, mounted in bearings 189, 190, is rotated by means of a pulley 191 and a belt, which slips when the fabric is fully wound. The roller 94 is moved up to a tack-feeding device by vertical movement of the slide 186, this movement forcing tacks, held by magnets, into the roller. The slide 186 moves in guides on the machine frame, and is operated by means of a treadle 196, Fig 2, rods 195, and levers 194, which are pivoted to the shaft 129. The bearings 185, 189, 190, Fig. 5, are vertically movable in brackets 198, 199, 200, respectively, and are normally pressed downwards by springs 201. The edge of the fabric 12, Fig. 6, passes beneath the roller 94 on to anvils 203, and is bent around the roller into the fastening position by means of curved fingers 205, which are operated through racks and toothed segments by the upward movement of the slide 186. Over each anvil 203 is an intermittently-rotating device 211 provided with a series of radial permanent magnets 212, each of which collects a tack from a shoot 216 forming a continuation of a hopper 217. The hopper and the tack-collecting device are movable together with a frame 214, which is adjustable along a transverse bar 220. The hoppers are loosely pivoted on a shaft 218, and their forward ends are loosely held on a shaft 219, to which the bottoms 223 of the hoppers are fixed. A starwheel 225 on the shaft 218, which is rotated by means of a belt and pulley, is adapted to engage an arm 224 on the shaft 219, thus vibrating the bottoms 223 to agitate the tacks in the hoppers. The tacks pass down the shoot 216 with their stems projecting through a slot in a guide or bottom 229 and with their heads between the bottom and a yielding plate 230, which has an inturned end 231 adapted to hold the tacks in the shoot until released. The shaft 219 is supported by a lever pivoted on one end of the shaft 218 and by an arm pivoted on the other end, and the lever has its free end in the path of a tappet on the cross-head 104, Fig. 2, whereby the hoppers are rocked about the shaft 218, so as to throw the lower end of the shoot 216 away from the tackcollecting device 211. The inturned end 231 then engages a stop 237, and the yielding plate 230 is raised from the bottom 229, as shown in Fig. 2, to release one tack of the row, the remainder of the row being held by a point 238 of the stop, which point enters between the lowest two tacks. The released tack is held by the end of the shoot, and is removed by one of the magnets 212 when the hopper and shoot are returned bv springs to their former position. The devices 211 are intermittently rotated by means of ratchet-mechanism operated from an eccentric on the shaft 120. Fig. 2. The upward movement of the slide 186 forces the tacks into the roller 94, and, on the downward movement, stops engage the bearings 190, 185 and thus raise the spindle 188 and roller 94 to permit the roller to rotate and wind the blind upon itself. If desired, the tacking may be performed automatically instead of by means of the treadle.