Registration apparatus for a sheet material article handler

A registration device for a sheet material article handler, the registration device comprising:

• a movable backstop configured to sequentially engage a leading edge portion of a sheet material article moving in a direction of movement of the sheet material article along a path of movement of the sheet material article in the sheet material article handler so as to register the sheet material article relative to the sheet material article handler;
• and
• a driver configured to move the backstop along an arcuate path in the direction of movement of the sheet material article from a first position out of the path of movement to a second position in the path of movement, the driver being configured to rotate the backstop about an axis in a single angular direction so as to define the arcuate path, the axis being disposed at a movable table of the sheet material article handler;
• the driver being configured to move the backstop along the arcuate path from the first position to the second position as the table is moving in a direction opposite the direction of movement of the sheet material article along the path of movement of the sheet material article.