Patent GB-708334-A (GB)
Title: Improvements in and connected with package and like binding mechanism
Inventor: MOSEY FREDERICK WILLIAM
IPC: B65B13/22
Filed: 1950-09-29
Abstract: 708,334. Wire &c. strainers. SEAL-LESS STRAPPING, Ltd. Sept. 11, 1951 [Sept. 29, 1950], No. 23851/50. Class 45. (Also in Groups XVII and XXII] The mechanism for binding packages with wire &c. comprising a device for connecting overlapping portions of a loop of wire extending around the package, means for severing a portion of wire extending from the near side of said device to a supply and means for projecting the end portion thus formed lengthwise for insertion into the connecting device, the end portion is projected by gripper means including a pair of grippers movable simultaneously outwardly and inwardly, one of the pair being operative to hold the wire during a relatively short outward stroke for tensioning the loop onto the package and the other being operative to hold the wire during a relatively long inward stroke for effecting the required projecting end gripper being adapted to permit passage of the-wire during its opposite stroke. The mechanism shown in Fig. 1A-C comprises a slotted twisting pinion 1 and associated cutters, a holding gripper 2, a movable guide finger 4 and tensioning and wire-projecting grippers 3 and 5 carried by pivoted arms and movable differentially, the gripper 5 having a longer stroke than the gripper 3. After the wire has been trained around the package as shown in Fig. 1A, the gripper 3 is closed and moved outwardly to tension the loop W2, the wire passing freely through the gripper 5 which is simultaneously moved outwardly a greater distance. The twisting pinion and cutters are then operated, leaving the severed wire end W1 in the gripper 2 and the wire part W3 extending through the grippers to the supply W4 and the gripper 2 is opened and the finger 4 projected to release the end W1 and move the part W3 to the dotted line position, Fig. 1B. The grippers 3, 5 are then moved inwardly, the gripper 3 being open and the gripper 5 closed, so that the wire part W3 is projected past the twisting pinion and between the open jaws 2a, 2b of the gripper 2 as shown in Fig. 1C. The gripper 2 is then closed and the finger 4 retracted or released, whereby the wire part W3 is moved laterally into the twisting pinion whose slot is at this time horizontally outwardly. This step can be arranged to conclude the binding cycle or may be effected by manual closure of the gripper as the first stop of the following cycle. The wire is then removed from the grippers 3, 5, looped around the package, and threaded again into the pinion and through the grippers ready for the completion of the cycle automatically. The sequence of operations is initiated by a manual control which trips a one-revolution clutch in the drive to a main cam shaft 7, Fig. 2A, arranged below the machine table 6. A cam 2c on the shaft operates through a lever 2c against a tension spring 2f to move the jaw 2b of the gripper 2 to the open position, the closing of the gripper being effected manually after release of a pawl 2k by depressing a handle 2g which acts through gears 2h, 2i on the toothed underside of the jaw. If it is desired to actuate the gripper entirely automatically, the manual control gear is omitted. The twisting pinion 1a, Fig. 4, is driven through gearing lb, 1c by a quadrant 1d on the shaft 7, and the cutters are mounted on spring- loaded plungers 1g, at either side of the pinion, which are lifted together on completion of the twisting operation by a lug 1h on the shaft acting through a lever 1i coupled to a cross-rod 1j. The finger 4 is slotted to receive the wire and is actuated by a cam 4b acting through a spring-loaded rocking lever, see Fig. 5A (not shown). The grippers 3 and 5 are respectively mounted on lever arms 3a and 5a, Fig. 6B, pivoted at 3h and 5c, and are actuated by a cam 3b acting through a lever 3d which is coupled to the arm 5a by a link 5b and to the arm 3a by an adjustable spring link 3e. The opening and closing of the gripper 3 is controlled by a cam 3i acting on the jaw 3j against the action of a tension spring 3l. The gripper 5 may be opened and closed manually or automatically.