Patent GB-438985-A (GB)
Title: Improvements in straining, securing and severing devices for wire bale and other package ties
IPC: B65B13/28
Filed: 1934-08-27
Abstract: 438,985. Wiring packages &c. FINLAY, A. H., Willesden, Holywood, Co. Down, Northern Ireland. Aug. 27, 1934, No. 24590. [Class 45] In a device for straining, twisting, and severing wire ties for boxes &c., in order to hold the first bight of the wire more securely in position whilst the wire is wound round the box, fixed holding means is provided between the twisting means and the severing device adapted to hold both bights of wire close to the point where the second bight is severed. The invention is shown applied to the machine described in Specification 230,969, [Class 45], comprising a straining lever 5 with gripping arms 7, 8 which first close on the wires and then strain them, a slotted twisting pinion 13 operated by the bent lever 15 bearing on a roller 16 on a gear segment 11, a holding device 1, and a fixed notcher 18, which is engaged by the second bight of the wire during the twisting operation and notches it preparatory to severance by the straining device. The free end of the wire is inserted in a slot 1<c> between jaws 1, la, it is bent at right angles over a projecting foot 1<d> of the jaw 1, and is swung round into a slot 1<e> of the jaw 1<a>, passed through the slotted pinion, under the notcher 18, under the anvil 8a on the gripping arm 8 and around the package, and the second bight of the wire is passed again through the slot 1<e>, and the pinion and under the notcher, and then between the anvil 8a and the upper gripping arm 7a. The pinion 13 is provided with a slot of varying width, the central part 13<g>, Fig. 5, holding the wires side by side, and the wider end parts receiving the twisted wires. A projection 19a on the frame plate adjacent to the notcher holds the first bight whilst the wire is wound round the box and during subsequent operations, and this projection also holds the second bight from slipping back if a second stroke of the tensioning lever is required. During twisting, the first bight is bent clear of the notcher and so released. The cut end of the wire is below the level of the first bight where the latter has been raised by the projection 19a, so that the user is less liable to injury. The slot 1<c> between the jaws 1, 1<a> is formed by a distance piece which may be replaced by another of different width and may have a vertical or an undercut front edge. In modifications, Figs. 6 and 7 (not shown), the jaw 1 may be carried on screws adjustable in the jaw 1<a>, or the jaws 1, 1<a> may be on the two arms of a resilient U-member and may be moved towards one another by a clamping bolt. The distance of the jaws 1, 1<a> from the twisting pinion may be varied by changing the spacing block 4. The lower face of the anvil 8a is serrated as shown at 8<c>, Fig. 1<a>, in order to prevent the wire springing out when not in tension. The gripping arm 7 is provided with a grooved arm 7a which keeps the wire at a constant radius from the pivot 6 and ensure a more gradual tensioning. The wire is positioned on the groove 7b by a lug 7c. The second bight of wire is held in place between the gripping arms when slack by a wire 8b on the side of the arm 8 acting as a clip. The operating levers 5, 15 may be extensible.