EMPLOYEE STATED HE AND HIS PARTNER WERE SETTING UP FOR BAGGING 100# BAGS. THE BAGGING SYSTEM HAS A SCALE, AN AIR TRIP MECHANISM, AND CAN BE SET FOR DIFFERENT HEIGHT BAGS. PARTNER ACCIDENTLY DROPPED THE HEIGHT OF THE SCALE AND EMPLOYEE'S HAND BECAME PINCHED BETWEEN THE BAG TRIPPER AND THE FRAME RESULTING IN A LACERATION REQUIRING STITCHES.