Patent GB-396959-A (GB)
Title: An improved automatic device for arranging the fastener members of sliding-clasp fasteners in rows
IPC: A44B19/46
Filed: 1932-10-27
Abstract: 396,959. Sliding-clasp fasteners. GUTBERLETT, H., 108, Bendahlerstrasse, Barmen, Wuppertal, Germany. Oct. 27, 1932, No. 30189. Convention date, Aug. 8. [Class 44.] In a sliding-clasp fastener machine in which the fastener members are fed intermittently from a pile of properly orientated members to a receiving member which may be a stringer or comb templet, the fastener members are fed to a device which brings them successively to correct position on the stringer or templet during advance of the stringer &c. The invention is described as applying fastener members to a stringer, and means are described for securing the members on the stringer by a pressing operation, and for producing blank intermediate spaces on a long length of stringer by interruption of the supply, the stringer being preferably advanced rapidly during such interruption. An automatic sorting device, of known kind, not shown, supplies fastener members with their clamping limbs downwardly directed, to a vertical magazine 12 from which they are released singly by a reciprocated feed-pin 50, passing to a receiving slot 102 in a reciprocated member 101 which brings the members to correct position over the stringer. The stringer 28 drawn from a supply roll, not shown, passes longitudinally along the machine round guide roller 31, between guide cheeks, not shown, and between guide and feed rollers 32, 34, 35, bearing on the stringer with spring- pressure and rotated intermittently by an oscillating arm with pawl acting on ratchet wheel 37. The guide cheeks, one of which is fixed and the other bears with adjustable spring pressure on the stringer, exert a braking effect which keeps taut that part of the stringer to which the fasteners are being applied. The fastener received in the slot 102 rests on a plate 103 along which it is moved by member 101 until over a slot at the end of the plate, whereupon the member is pushed through this slot into position on the stringer by a vertically reciprocated member 64. The limbs of the fastener are then pressed into clamping engagement with the stringer by jaws 66, 67 which are reciprocated towards and away from one another by a right and left screw 114 oscillated by a crank arm 115. Drive of pin 50 is effected through a spring-plunger 138 so that damage is avoided if pin 50 meets with resistance. Interruption of the supply of fasteners in order to produce a blank space on the stringer is effected by a stop 149 adjustably mounted on a ratchet wheel 140 fed step by step by a pawl 141 whilst the fasteners are being affixed, the stop 149 engaging at predetermined time with an arm 150 so as to hold pin 50 against movement during the requisite period, feed of the stringer not being interrupted. The end of stop 149 then strikes a lever 151 to effect release of pawl 141 and detent 147, wheel 140 being then returned by a spring, not shown, round axle 122, restoring normal working. The arrangement is such that pin 50 may be held by hand against operation if desired. To allow time for return of wheel 140 to its original position before the pawls re-engage to effect normal running, pawl 141 and detent 147 are held out of engagement by a spring 183 and screw 154 acting on a bar 155 until returned by an arm 157 carried by a ratchet wheel 156. Normally, detent 160 is out of engagement with wheel 156, which is oscillated idly in one direction by an oscillated pawl 159 and in the other direction by spring 162. When arm 151 is operated to disengage members 141, 147, detent 160 is moved into engagement and wheel 156 is fed step by step, arm 157 effecting re-engagement of pawl 141 and detent 147 after a predetermined number of oscillations of pawl 159. The Specification describes in detail the means for effecting the movements of all parts of the machine, correctly timed, from a single driveshaft 48 with belt pulleys 47. To effect rapid feed of the stringer in producing a blank space the arrangement shown in Fig. 9 may be used. This comprises a two armed lever 168, 170 loosely mounted on axle 122. Stop 149 engages arm 170 and moves it into contact with a screw 169 carried by arm 151, arm 168 moving rod 164 to the right and putting a spring 166 in compression. When operation of arm 151 effects release and return of wheel 140, spring 166 effects return of rod 164 and lever 168, 170. Movement of rod 164 to the left oscillates an arm 163 carrying an additional pawl 163a acting on feed wheel 37, which is thus operated to feed the stringer rapidly a distance equal to the required blank space.