Abstract: A machine tool loading apparatus is adapted to register the sheets being loaded directly in the workclamps of the machine tool. A four bar linkage is utilized to control the position of the sheet as the loader removes it from the supply stack and brings it into the workclamps. The four bar linkage is provided with a controlled amount of compliance which is released as the sheet is brought into the workclamps. The sheet is thus allowed a limited ability to be repositioned as the loading mechanism guides it into the workclamps, so that a registered position is achieved before the workclamps are closed. The preferred loader apparatus can be used to unload large parts from the machine tool. The loader apparatus may be adapted to the machine tool in conjunction with a material storage tower.

Abstract: A machine tool loading apparatus is adapted to register the sheets being loaded directly in the workclamps of the machine tool. A four bar linkage is utilized to control the position of the sheet as the loader removes it from the supply stack and brings it into the workclamps. The four bar linkage is provided with a controlled amount of compliance which is released as the sheet is brought into the workclamps. The sheet is thus allowed a limited ability to be repositioned as the loading mechanism guides it into the workclamps, so that a registered position is achieved before the workclamps are closed. The preferred loader apparatus can be used to unload large parts from the machine tool. The loader apparatus may be adapted to the machine tool in conjunction with a material storage tower.

Abstract: A marking tool assembly includes a plurality of marking punches for stamping alpha/numeric indicia into a workpiece. The punches are adapted to be indexed selectively to an active punching position beneath a striker which causes one of the punches to stamp the workpiece during the downstroke of the tool, the remaining punches resting idly on the workpiece. A stripper ring holds the striker rotationally stationary and also prevents rotation of a retaining ring for permitting up and down sliding of the punches in a holder and for guiding the punches to the active punching position.