| 摘要 |
<p>A method and apparatus for applying a tie around the gathered open end or neck of a bag to close the bag. A feed device (6) feeds a length of tie material (1) to a former (3) where the tie material is formed into a tie loop (2) around the gathered open or neck of a bag inserted in the former (3). After forming the tie loop (2), a leading , free end of the tie material 1 is held in a gripper device (14) and the feed device (6) for the tie material (1) reversed to pull the tie material and close the tie loop (2) around the gathered open end or neck of the bag . A cutter device cuts the tie material (1) after the tying operation to allow the bag to be removed from the former (3) with the tie secured thereto . A guard ring (16) prevents tightening of the tie loop and requires the operator to use both hands to initiate removal of the guard ring so that the tie loop (2) cannot be tightened with a part of the operators hand or fingers in the former (3). In one embodiment, the gathered open end or neck of the bag is inserted into the former (3) with a vacuum device.</p> |
