Patent GB-605934-A (GB)
Title: Improvements in or relating to machines operating cyclicly for applying strip material to cylindrical surfaces of drawing rolls
IPC: B65C3/12
Filed: 1943-05-12
Abstract: 605,9.34. Covering rollers. STEVENS, A. H. (Hadley, E. V.). May 12, 1943, No. 7566. [Class 80 (iv)] [Also in Group XV] A machine operating cyclically for applying strip material to the cylindrical surfaces of drawing rolls for spinning &c. machines, comprises a means for supplying said material, a support for the cylindrical rolls, roller means engaging said surface, means for applying adhesive to one face of said material, the material being started on to said surface with the face bearing said adhesive in contact with said surface and in position to be engaged by said roller means, and means for cutting 'off said material at a definite time in the cycle of said machine. The drawing roll 250, Fig. 15, has two parts to be covered and this results in many parts of the machine-being duplicated. Briefly, the operation is as follows : The machine is driven by a motor 23, Figs. 1 and 3, connected by a pulley 28 to a pulley 27 on a reduction gear 25. One of the two sources of parchment paper, the material used for the covering, is indicated at 320, Figs. 1 and 3, and the path of the paper is indicated by a dash line to the covering mechanism at the centre of the figure. The paper strip passes over an adhesive distributing roller 342 which has received a coating of adhesive from a roller 334, rotating in a bath of adhesive. Uncovered drawing rolls placed upon a trackway 375, feed by gravity into the covering mechanism and having been covered are automatically deposited upon a discharge. trackway 366. The rolls from the trackway 375 are received in a turret 86, Fig. 6, which is moved by a six-station Geneva-motion star-wheel 65, Fig. 1, which carries the rolls from the receiving position 250a at the foot of trackway 375 to the covering position 250 and thence to the discharge track 366. Starting at the upper left-hand corner of Fig. 6, the coated paper strip 320 passes under a guide roll 220 and between two fluted feed rollers 191, 206 to the covering position. In this position, the roll is floatingly supported in a slot of the stationary turret plate 86 and between a fluted pressure roller 229 and a fluted driving roller 91 for rotating the roll. At a predetermined time in the cycle, e.g. after two-and-a-half turns of paper have been wrapped around the roll, a knife 163, rotated from the motor 23 by a belt 174, is lowered under the action of a cam 145 to sever the paper strip, and is then raised by a spring. A cam 289, Fig. 6, is employed to lower the forward end 300 of a pipe 298 through which is passed a blast of air to impinge on the roll and finish off the end of the severed strip. A blast of air through another pipe 398 is employed to facilitate the attachment of the leading end of the strip to the roll as it is raised to the covering position in the turret, the mechanism being so proportioned that, as the roll is advanced to the covering position, the arc of its movement intersects the depending free end of the strip material 320. A shaft 29 of the reduction gear 25 carries a sprocket 30 which drives, through a chain 40, sprocket 31, and a safety shear pin 39, a shaft 32 (see also Fig. 8) mounted in bearings 33, in side members 34, 36. On this shaft are mounted (1) a gear 41 which, through mutilated gearing, drives fluted rollers 90, 91. Figs. 3 and 6, on which the roll 250 to be covered rests; (2) a cam 58 for actuating a feed bar 388, for feeding rolls to the turret; (3) a cam 59 for actuating a plunger valve 310 for controlling the air blasts through pipe 398; (4) a member 50 for actuating the star-wheel 65 (Fig. 1) of the turret Geneva mechanism and (5) a cam 115 for actuating a plunger valve (not shown) for controlling the air blasts through pipe 298. Other shafts mounted in the side members 34, 36 actuate the various rollers and cams for controlling the air blasts and mechanism for feeding the rolls to the turret and for advancing the strip. Coaxial shafts 188, 189 carry respectively fluted rollers 191, 193 and pinions 199, 197 gear with wheels of a ratchet-and-pawl feeding device. Arms 224, 226, Fig. 6, journalled on the shaft 141 support at their free ends a shaft 228 having fluted rollers 229, 230 formed integral therewith, the shaft being loaded by springs 235 adjustable by nuts 234 on rods 232, so as to vary the pressure on the drawing roll 250. A cam 124, Fig. 8, actuates ratchet mechanism (not shown) to rotate the rollers 229, 230. When the supply of rolls ceases, a mercury switch is opened to stop the motor.