Lock-out for power assisted strapping tool

摘要

A lock-out assembly for a strapping tool prevents inadvertent actuation of the tool sealer cycle prior to completion of the tensioning cycle. The tool includes a pneumatic module having tensioning cycle and sealer cycle valves mounted therein. The valves are actuated by overlying levers. The lock-out assembly includes an arm operably mounted to the pneumatic module having a first engaging portion for engaging the tensioning valve lever and a second blocking portion for blocking the sealer valve lever. The arm is movable between a first position in which the tensioning valve lever is in the non-actuated position and the arm block portion interferes with movement of the sealer valve lever to prevent moving the sealer valve to the actuated position, and a second position in which the tensioning valve lever engages the arm engaging portion to move the arm blocking portion from interfering with the sealer valve lever to permit moving the sealer valve lever into contact with the sealer valve to move the sealer valve to the actuated position.