Signode Corporation

Robert J Massion

Robert J Nix

Peter Lems

A strapping tool of the type which crimps or notches a seal around overlapping strap ends extending in opposite directions in a tensioned strap loop around an article being tied. The tool has a frame, a sealer jaw assembly mounted for at least opening and closing movement about the seal and an actuator therefor. The actuator includes a member adapted to be rotated about an axis in a first direction to a predetermined angle to fully close the jaw assembly and adapted to be rotated about the axis in a second, opposite direction to open the jaw assembly. A pawl is mounted on the frame for pivoting in the first and second directions and is biased against rotation in both directions to an initial, unengaged position when the jaw assembly is both fully closed and fully opened. An engaging means is connected to the actuating member and positioned for pivoting the pawl in the second direction when the actuating member is rotated in the first direction to close the jaw assembly and for engaging the pawl in a position pivoted from its initial position to prevent rotation of the actuating member in the second direction until the actuating member has been rotated in the first direction through the predetermined angle to carry the engaging means past the pawl.

Positive sealing assembly for hand operated strapping tool

A strapping tool for tensioning a loop of strap having first and second strap portions about an article is provided with a tension sensing mechanism which includes a gripper member for gripping the second strap portion and restraining it from movement during tensioning of the loop. A first arm is pivotally mounted to the tool frame for pivoting movement in a first direction and in a second, opposite direction. A first spring biases the first arm in the first direction. A second arm is pivotally mounted on the first arm for pivoting movement in the first and second directions away from and towards the strap portions, respectively. A second biasing spring is provided for biasing the second arm in the second direction. A tensioning wheel is mounted on the second arm for being pivoted with the second arm to engage the first strap portion and for being operated to tension the loop when the second strap portion is restrained by the gripper whereby, at a predetermined tension level, the loop tension reaction force transmitted from the second arm to the first arm urges the first arm to overcome the first spring and pivot relative to the frame in the second direction. A control means is provided for responding to the pivoting movement of the first arm in the second direction for terminating the operation of the tensioning wheel at the predetermined loop tension level.

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Cary, IL, United States of America

Robert J Massion