Patent GB-307949-A (GB)
Title: Hat pouncing machines
IPC: A42C1/06
Filed: 1927-09-16
Abstract: 307,949. Doran, J. F. Sept. 16, 1927. Pouncing.-Relates to hat brim pouncing machines of the kind in which two levers carry pads which are moved in contact with the upper and lower surfaces of the brim, and consists of mounting the hat on a block closely fitting the crown of the hat and supporting the block so as to allow the axis of rotation of the block to move toward and away from the tools, this movement being determined by the shape of the crown of the hat so that the hat brim is fully related to the tool in accordance with its non-circular shape. Means are provided for rotating the hat and the closely fitting block to feed the brim past the tools in operative relation thereto. The machine comprises a pin engaging the usual hole in a hat block, the pin being carried by a rod 18, Fig. 1, pivoted to move freely towards and from the tools, being urged towards them by a spring 23<a>. The support may be locked in any desired position by a clamping screw engaging a link 23. The brim of the hat is gripped between driven feed rolls 26 and fed between pouncing pads reciprocated in opposite directions. A handle 31 actuates belt-shifting means co-operating with fast and loose pulleys on a shaft 10 carrying pulleys 12, 13 driving the machine. The feed rolls 26 are driven by a belt pulley 128, Fig. 6, and bevel gears 127. The upper roll is pivoted at 132, and the grip of the rolls on the work is adjusted by a hand-wheel 129. The pouncing pads are carried on arms 7, 8, Fig. 2. oscillated about a tubular shaft 71 by cranks 86 on a shaft driven by a belt pulley 19. To stop the pouncing after a predetermined treatment, a cam 26a, Fig. 8, on the shaft of one of the feed rolls operates a push rod 705 linked to a pawl actuating a ratchet wheel 709 provided near its circumference with a ring of holes into two of which are inserted pins 710 adapted after a predetermined rotation of the wheel, to engage an arm 712 on a rod 714, see also Fig. 1, normally spring-pressed clockwise. The lower end of this rod is off-set normally to engage a lever 718, pivoted at 718a, loosely encircling a rod 73, and linked to a treadle 48. The rod 73 is urged upwardly by a strong spring 729, and at its upper end is guided within the sleeve 71, Fig. 2, there carrying a pin 65 engaging the upper pad arm 7, the rod 73 thus raising the arm on the arm 712 being engaged by the pin 710. Rise of the arm 7 actuates a lever 700, Fig. 8, to remove the push-rod 705 from the cam 26<a>. A cam on the boss of this lever simultaneously raises the upper feed rod 26 slightly to release the grip on the hat brim. In a modification, the rod 73 is raised direct by a treadle, and a pivoted distance piece inserted about the tube 73 under the arm 7 to keep this raised until it is desired to restart the machine. Sandpaper on a roll 500, Fig. 10, is preferably fed between driven rollers 200, 201, over a pad 15 which may be of rubber filled with water, and between driven rollers 202, 203, used paper being torn off against an edge 204<a>. The roll is braked by a pivoted spring-pressed plate 244. The rollers are inclined to the pad because the pad is narrow at its end to equalize rubbing over the width of the brim. The upper roller is pressed toward the lower one by bell-crank levers 222, the parallel ends of which are pressed apart by a spring 230 in a telescopic rod 228. To facilitate release of the pressure for the insertion of a fresh roll of paper, the rod is in two parts abutting against a common pin 227, a light spring 233 maintaining the parts together with the assistance of gravity. On strong downward pressure, the rod collapses. allowing the strip of paper to be positioned between the rolls. As shown, a push rod 660, through pawl and ratchet gear, drives the rollers a short distance at each separation of the arms 7, 8, the two pairs of rollers being geared together by bevel pinions on a flexible shaft. Preferably, the delivery rollers 202, 203 are driven at a slightly greater peripheral speed than the other pair, to keep the sandpaper strip taut. In a modification, the delivery rollers only are driven, an idler roller being substituted for the other pair. In another modification, the used sandpaper is wound on a roll 600, Figs. 23 and 28, and this roll only is driven by pawl and ratchet gearing operated by the oscillations of the pad arm 7. A further reduction gearing is then interposed betwen the ratchet gearing and the roll. To compensate for unequal diameters of the roll 600, a plate 632 bears against the roll and moves with a shield 631 masking the teeth of the ratchet to reduce the travel of the ratchet as the diameter of the roll increases. The ratchet may be operated by inertia, an arm carrying the ratchet moving with the pad arm, and contacting with stops as the pad arm oscillates. In this modification, a spring pulls the pawl arm against one of the stops as the pad arm is raised, stopping the feed of the paper. To enable the spool to be turned when a new roll of sandpaper has been positioned, a key 635, Fig. 27, is provided with a pin 690 adapted to engage a slot at the end of the roll spindle 610, and a parallel-sided portion 691 shaped to enter between a pair of half rings 612b normally maintaining the spindle 610 in position by engagement with a lug 610<a> thereon. Fixed pins within the members 612<b> form a driving connection between the spindle and its driving worm wheel 611, and the spindle has a squared portion to engage the spool on which the paper is wound. In the case when the paper is drawn off a roll, the roll may be provided with a brake automatically adjusted in accordance with the changing diameter of the roll. A band brake 517, Fig. 19, on a disc clutched to the roll by dogs is adjusted by a screw 524, Fig. 21, operated by bevel pinions turned by an arm spring-pressed against the outer surface of the roll. The automatic mechanism may be omitted, and the brake adjusted manually. The roll is mounted universally adjustable, a clamp 534, Fig. 19, engaging a round spindle 534<a>, itself adjustably clamped to a rod 504 at right-angles to the rod 534 a. The roll may be mounted on the pad arm 7 or the frame of the machine. Between the crown of the hat and the upper pad is a shield 559, Fig. 9, to prevent injury to the crown. The shield is pivoted to the frame. To allow for brims of unequal the pads may be adjusted to tip about a pivot at right-angles to the length of the pad, or may be. self-adjusting and urged to parallelism by springs. To regulate the pressure of the pads on the brim, the spindle 73 is encircled by a pair of springs 76, 80, Fig. 1, engaging adjustable collars, the upper spring tending to press the upper pad downwardly, and the lower spring tending to lift it.