Abstract: A strapping machine includes a machine body with a package-strapping space. A strap is fed to the package-strapping space. A spring-loaded swing arm is pivoted to the machine body, and is associated with a rotating shaft via a cam unit such that rotation of the shaft results in turning of the swing arm relative to the machine body. An electrically operated clamp unit is mounted movably on the swing arm, and is movable relative to a strap passage in the swing arm. A delay circuit is electrically coupled to a detecting device and the clamp unit. When the detecting device detects a first position of the swing arm, the delay circuit will actuate the clamp unit to move from a releasing position to a clamping position after a preset delay time. When the detecting device detects a second position of the swing arm, the clamp unit is immediately actuated to move from the clamping position to the releasing position.

Abstract: A strapping machine includes a machine body which defines a package-strapping space with a strap guide path. A package support plate is disposed above the strap guide path, and has opposite left and right sides which extend in a direction transverse to the strap guide path. A strap is fed to encircle the left and right sides of the package support plate. A swing arm is mounted pivotally to the machine body, and is turnable away from the machine body for strap tightening operation. A clamp unit is mounted movably on the swing arm. A swing lever is mounted swingeably underneath the package support plate adjacent to one of the left and right sides in such a manner that one end of the swing lever passes over the strap guide path, and that the other end of the swing lever is urged to abut against a micro switch which is electrically coupled to a driving unit for driving the clamp unit.