Patent GB-137295-A (GB)
Title: Wire-bound-box-blank machine
IPC: B27M3/36
Filed: 1919-12-29
Abstract: 137,295. Craig, E. Dec. 28, 1916, [Convention date]. Stapling and discon tinuous wire-stitching.- The invention relates to stapling machines for making wire - bound box blanks, more particularly those in which alternate cleats x, Fig. 20, on the same end of the box are omitted until the ends are incorporated. The alternate cleats are automatically secured by long staples, short staples being used to secure the binding wire 30, 31, 32 on the intermediate blanks. Means are provided to prevent staples from being fed between gaps in the blanks. The means for controlling the stapling heads consists of a clinching-plate 79, Fig. 11, which is actuated by the material fed forward so as to determine the length of staple and so on. Two blanks Y, Fig. 2. and then a cleat x are alternately fed into a hopper G, Fig. 1. and spaced blocks E. Fig. 12, and F, Fig. 13, attached to chain links D, Fig. 1, engage the cleats and blanks in due order, the blanks being engaged by the uprights f, and tha cleats by the sidepiece e, as shown in section in Fig. 2. The links D are supported in channels b attached to guides B. The hopper, guides, and blocks are all adjustably spaced to suit different sizes of boxes. The machine is driven from a shaft. H, Fig. 1, which carries an eccentric i and rod I to reciprocate the vertical stapling-heads and a reciprocating rod 25, Fig 6, which drives adjustable feed ratchet gear 21, 22 on the chain wheel 3. A hand-operated pawl 26 and lever 27 are used to step forward the wheel 3 &c. when necessary. Three bobbins. Fig. 7, feed continuous wire 30, 31. 32 to bind the box blanks. and other wire is fed from other bobbins 34 to the staple formers and drivers. The middle former and driver J uses a short staple only, but the outside stapling-heads make and drive groups of long and short staples alternately according to the position of the cleats. The outer stapling- beads are made double, and are each fed with two rolls of wire from large and small rollers respectively for long and short staples. A large feed roll 59, Fig. 8, is fed forwards by a pawl 60 and a smaller roll 49 by a pawl 53. Both pawls are actuated by a shaft 55 which is oscillated by an arm 54 and pitman 63, Fig. 6, connected to suitably tuned cam-apparatus 66, 65, &c. The actuating-pawls 60 and 53, Fig. 8, are thrown alternately or both together out. of gear according to the feed of the material on the links D. A cleat present in the guides B presses outwards the spring pivoted clutch-plate 79, Fig. 11, so as to actuate bell-crank lever motion 77, 75, 74, Fig. 6, and actuate a cam 72 so that the pawl 53 is rendered idle and the pawl 60 operates the larger roll of wire to make long staples. The wire is fed to the larger 40, Fig. 17, of the double stapling-head and a long staple is made and driven. If a cleat does not operate the clinching- plate 79, the pawl 53 comes into operation and feeds the smaller roll 49 of wire to the smaller head 39. When a gap occurs between the blanks, no staples are made because both pawls are lifted by a cam 81, Fig. 9, operated by a rod 83 connected to bell-crank motion 85, 86, Fig. 11, which in turn is connected with a spring-pressed roller 88 which enters the gap between the blanks.