Patent GB-585979-A (GB)
Title: Feeding and cutting mechanism for cord
IPC: B31D1/02
Filed: 1944-11-20
Abstract: 585,979. Feeding and cutting cord. GOEPFERT,O. F. Nov. 20, 1944, No. 23071. [Class 31 (i)] [Also in Groups II and XVII] A cord-feeding and cutting- mechanism for feeding cord towards a predetermined position at which a piece of cord is to be attached to a flat sheet-like article comprises a first pair of feed rollers 45, 46, Fig. 2, for drawing a continued length of cord 31A from a reel 31B, Fig. 1, or other source of supply, and a second pair of rollers 51, 52 which receives the cord from the first rollers and feeds it towards said position, the second rollers having means for severing selected lengths of the cord. As shown, the mechanism is combined with a stapling-machine 20 which staples each length of cord 31 to the cardboard cover 28, Fig. 16, of a cigarette-paper booklet, the cord when in use being drawn into a slot 37 to hold the cover closed. The covers 28 are stacked in a container 27 and are transferred, one at a time, from the bottom of the stack by a feed member 82A, arranged on a reciprocating carriage 82, to a position along a slideway where the cord is stapled thereto; subsequently the cover is moved over a bar 95 where a blast of air from a pipe 96 turns the cover about the bar so that it is inverted and falls on a cross conveyer 94. The cord-feeding mechanism unit comprises a housing 38, bolted to a frame 41 of the machine 20, in which the rollers are mounted. The cord is gripped in circumferential grooves in the rollers, is guided through the casing by tubes, and cut into lengths by one or more transverse cutters 57 inset in the roller 52. The cutters co-operate with transverse grooves 55 in the roller 51, provision being made whereby fresh grooves can be brought into use when the others are worn. A stripper 43B is provided with a lip which enters the groove in the roller 51 to deflect the cut ends of the cord into the flared end 43A of the last guide tube which guides the cord to stapling position. The rollers are geared together and are driven from a rack 81 on the reciprocating carriage 82 which engages a pinion 75 on a one-way clutch, the latter driving a stub shaft 71 (not shown) mounted on the frame 41. A pinion on the shaft 71 drives the feed rollers through a pinion 65 mounted in the casing 38. The carriage 82 is reciprocated by a motor 92 driving a crank disc 87 which rocks a bell-crank lever 83, 84 through a link 88, the bell crank lever being connected to the carriage by rod 86. An adjustable brake 102 mounted in the housing 38 engages a drum 101 on the stub shaft 71 to prevent overrunning of the one-way clutch. To prevent variation in feeding of the covers 28 to the stapling position due to lost motion in the operating means of the carriage 82, the rack 81 is slotted and held on to the carriage by screws passing through the slots. The rack is resiliently urged so that the corresponding ends of the slots engage the screws. An adjustable stop device 115, 117, in conjunction with the above arrangement, adjusts the limit of movement of the rack 81 at the end of the return stroke, the carriage completing its stroke, after the arrest of the rack, against the action of springs, which are arranged between the rack and a projection on the carriage.