Patent GB-747420-A (GB)
Title: Improvements in and relating to machines for banding packing-cases
IPC: B65B13/34
Filed: 1953-07-15
Abstract: 747,420. Tensioning bands. REBICHON, [nee MEYRONNEINC], J. July 15, 1953 [July 17, 1952], No. 19676/53. Class 45. [Also in Groups XV and XXX] In a machine for banding pack. ing-cases comprising a hand lever controlling a tensioning mechanism and raising and lowering a tool for crimping a strap to fasten the band ends, a strap magazine, and a feeder bringing the straps one at a time to the crimping tool, the tensioning mechanism comprises a reciprocatory member and the feeder is connected to the member by a link. The lever 21, provided with a button 33, is pivoted about a shaft 36 which carries a cam 37 controlling the crimping tool and a gear-wheel engaging the reciprocatory member which is a rack 12, the arrangement being that movement of the lever with the button depressed rotates the cam whilst movement of the lever with the button free reciprocates the rack. The rack carries a tensioning gripper 64 which turns to the inoperative position at the end of the rack stroke as a protuberance 64a strikes the machine frame. Mounted on the machine frame adjacent the gripper 64 are a stop gripper 7 and a gripper 6 for holding the fixed end of the band, the grippers 6, 7 being rendered inoperative by rods 11 contacting the rack. The end of the band which is fixed during tensioning is passed under the gripper 6 and lies on projections 1a, 1b on the frame. The other end of the band lies above the end to be fixed passing over a blade 72, through a slot 6a in the gripper 6 to lie beneath the grippers 7, 64. The link 23, pivoted at 24 to the frame, engages the reciprocatory strap-feeder 16, and is detachably coupled to the rack by a spring- pressed ball 69, a pawl 18 preventing full movement of the feeder during rack movements whilst a strap is positioned in the crimping tool. A stack of straps 75 in the magazine is pressed downwardly by a spring-driven member 59, the magazine being so positioned that, during the initial tensioning movement of the rack, the feeder carries the bottom strap from the magazine to the crimping tool where it is held in grooves 53. Movement of the lever in the direction F (Fig. 1) with the button free moves the rack to the right so that all the grippers become operative to tension the band. If the band tension is not sufficient after the first stroke of the lever the tension is increased by a number of short strokes which do not release the grippers. When the tension is satisfactory the button is depressed and the lever is returned to the initial position shown in Fig. 1. The crimping tool comprises a vertically reciprocatory frame 49, 50, 51 on which are pivoted jaws 54. The underside of the part 51 serves as an anvil during crimping and is provided with projections 52. During the first part of the movement of the hand lever with the button depressed from the position shown in Fig. 1, the cam lowers the tool and strap, further lever movement closing the jaws to crimp the strap, and final lever movement causing a blade 57 on the tool frame to coact with the blade 72 to shear off the waste portion of the band. The hand lever is returned to the position shown in Fig. 1 with the button free so that the rack and feeder are returned to their initial positions and the grippers are rendered inoperative, the connection between the lever and cam being such that during the last part of the movement the cam is rotated to lift the crimping tool. Specification 713,384, [Group XV], is referred to.