Patent GB-708578-A (GB)
Title: Improvements in or relating to apparatus for binding packages
IPC: B65B13/28
Filed: 1952-02-22
Abstract: 708,578. Bale-tying machines. BRUNING- HAUS, H. Feb. 22, 1952 [Feb. 2, 1952], No. 4770/52. Class 45. [Also in Group XXII] An apparatus for binding a package with a metal wire or wire-like band of the kind in which the wire after being placed around the package and passed through a twisting device, is gripped by gripping members, comprises a supporting frame, a first gripping member mounted fast thereon, a second gripping member constituted as an intermittent gripping and one way feeding device mounted in the frame, and a third gripping member mounted fast in the frame, characterized in that the twisting device is arranged between the first and third gripping members which grip the wire and are stationary during tightening of the wire and that the second gripping member is arranged to reciprocate rectilinearly between the twisting device and the third gripping member, the second and third gripping members each being provided with unidirectional band gripping means both operating against the direction of movement of the band. General features.-Wire tensioning, twisting and cutting mechanisms are mounted on a baseplate 8 which in use is placed on top of a package to be wired. The tensioning mechanism is operated by to-and-fro movement of a lever 30 and the twisting and cutting mechanism by a single stroke of a lever 32. Tensioning mechanism.-This consists of a gripper 7 on one side of the twisting mechanism for holding the free end of the wire and a movable gripper 15 and a fixed gripper 16 for the supply end of the wire after it has been passed through the twisting mechanism and cutters, round the package and back through the twisting mechanism and cutters. The free end of the wire is first inserted in an aperture in the gripper 7 and is then bent through 180 degrees to form a hook to resist the tensioning strain. The grippers 15. 16 are arranged to hold the wire against pull in one direction and release it for movement in the other direction and act alternately, the jaws 17, 18 being spring loaded for this purpose. The fixed gripper 16 is adjustably mounted on two arms 23, 24 extending from a bracket 22 on the base plate and the movable gripper 15 is fixed to a spindle 28 having a very coarse thread, the spindle being moved longitudinally by a nut 29 rotatably mounted on the bracket 22 and a similar bracket on the other side of the twisting mechanism. The gripper is prevented from rotation by a spindle 25 on which it slides and which is secured to the bracket 22. The nut 29 is rotated by the lever 30 which is spring loaded. The disposition of the grippers 15, 16 is such that the wire is offset in passing from gripper 15 to gripper 16 so that the wire is securely held by the gripper 16 despite movement of the gripper 15. Twisting and cutting mechanism.-The wire is twisted by a pinion 11 which has one tooth gap recessed to form a slot for the wire and which is rotatably mounted by brackets on the base plate 8. The pinion 11 is driven by a gear wheel 33 which in turn is rotated through a disc 35 by the lever 32. The disc 35 is integral with the gear wheel 33 and has two diametrically positioned recesses 36 which are engaged in alternate cycles by a pawl on the lever 32 so as to rotate the gear wheel through half a revolution and thus cause the pinion 11 to make several revolutions to twist the wire. The wire is guided into the slot of the pinion 11 by fork-shaped guides 39, 40 one on each side of the pinion and between each guide and the pinion is a movable cutter 9, 10 and then a co-operating fixed cutter 37, 38. The movable cutters are pivotally mounted and are shaped so that the cutter 9 cuts the inside or free end of the wire and the cutter 10 cuts the outside or supply end of the wire. The two cutters are connected together behind the twisting pinion and the connection is engaged by a stop 42 on the lever 32 towards the end of its stroke to operate the cutters.