Patent GB-190821154-A (GB)
Title: Improvements in or relating to Machines for Making Box-blanks.
Inventor: BOULT ALFRED JULIUS
Filed: 1908-10-07
Granted: 1909-04-08
Abstract: 21,154. Boult, A. J., [National Wire Bound Box Co.]. Oct. 7. Stapling.-Machines for making wire-bound box-blanks by stapling together sheets, cleats, and binding-wires, such as that described in Specification No. 16,139, A.D. 1905, are provided with adjustable means for effecting the feed of the sheets &c. by an intermittent thrust applied to the binding wires. The stapling devices 36, Fig. 1, are carried by a fixed bar 22, and are actuated from a crosshead 34, which is connected by links 33 to eccentrics 32 on the main shaft 31 ; the latter is driven from a clutch shaft 25 on the depression of a treadle 30. The feed table 38, Figs. 1, 11, and 15, for the sheets and cleats consists of a flat bar 40, side strips 41, and a narrow track 42, which are straddled by a number of blocks 55 for use in spacing apart the cleats and sheets. Beneath the tracks 42 are similar tracks 44 Fig. 3, which are hung by brackets 45 and adjusting-bolts 46 from the table 38. At each end of the feedtables are guide-rollers for flexible endless tapes 54, which slide along the upper surface of the tracks 42 and the under surface of the tracks 44. They pass through and frictionally engage the blocks 55, which normally travel with the tapes, hut slide along them when subjected to a sufficient pressure. Each block 55 is provided with a projecting pin 57, Figs. 11 and 15, to engage the sheets, and with a removable lug 56 to engage the cleats. To position the first sheet and pair of cleats relatively to each other and the staple-drivers, a movable block 61, Fig. 5, adapted to slide on bolts 63 towards and away from a fixed cross-bar 24 is provided. This block supports spring-pressed pins 70, which, on the depression of an accuating-treadle 68, rise above the bars 40 into the paths of the cleats. The mechanism for intermittently feeding the blanks by means of the binding-wires 72 consists of a wheel 76, Fig. 1, having pegs 77 projecting from holes which are arranged in transverse lines round the periphery of the wheel. The latter is adapted to be rotated by a spring-pawl carried by a link 78, which is connected to a wrist-pin sliding in guides on the face of a disk 73 secured to the shaft 31. Integral with the wheel 76 is a gear 82 engaging a loose pinion 83 on a manually-operable shaft 84 ; the pinion is clutched to the shaft on the depression of the treadle 68. The shaft 84 carries three sets of gear wheels and integral wire-feeding wheels 93, Figs. 1 and 3, which co-operate with similar wheels 95 mounted eccentrically on rock-shafts 94. The wheels 93, 95 intermesh, but yield against springs to unevenness in thickness of the wires. The latter pass through guide tubes 99 adjacent to each staple driver. To form a box-blank, two cleats 101, Fig. 15, are placed on the tracks 42 behind a pair of blocks 55, and the treadle 68 is then depressed to raise the pins 70. A sheet 102 is then placed on the cleats, and the whole is slid along until stopped by the pins 70. The operator then rocks the shaft 84 to feed the wires beyond the edge of the sheet, and then rotates the wheel 76 until a stud 103, Fig. 1, contacts with a positioning-finger 104, the teeth 77 having been previously arranged in the wheel 76, and the wrist-pin on the disk 73 set, so that the wires are fed at each up-stroke of the staple-drivers through a distance equal to the desired spacing of the staples. The treadle 68 is then released to allow the pins 70 to fall, and the treadle 30 is depressed to rotate the main shaft. This causes the cross-head 34 to descend to drive the staples, which secure the binding-wires into the blank. While this is taking place, a second pair of cleats and a second sheet are placed in position to be engaged by the next pair of blocks 55, which force them against the rear of the first blocks, and so on to the fourth pair. After these are fastened, the treadle 30 is released, the pins 70 are raised, and the rock-shaft 84 is manually rotated until a sufficient length of wire is left between the blanks. The machine is then re-set, and the cycle of operations is repeated. After each blank has been made, the binding-wires are severed by a pair of shear blades 111, 112, Fig. 4, mounted respectively on a fixed bar 105 and a vertically-slidable bar 108, which is spring-controlled. The bar 108 is actuated by a rod 116, the movement of which is controlled by the peg-wheel 76. Fig. 16 shows a finished blank.