| 摘要 |
In a strapping tool of the kind in which a knurled rotary dog is urged into frictional engagement with the face of one end of a loop of metal strapping and rotated to tighten the loops around a package, overlapping ends of the loop then being secured by jointing means in the tool, the inclusion of means for sensing the bodily movement of the rotary dog in compressing and penetrating the strapping as an indication of the tension in the loop. When a predetermined bodily movement of the rotary dog has occurred the sensing means causes or allows the jointing means to secure the ends of the loop. |
