Apparatus for holding a crystal block

摘要

The apparatus includes a gripper unit (4) axially movable on the drawing shaft (1), and has at least two gripper arms (5) placeable against the crystal block section (11) with larger diameter. The drawing shaft is provided with a carrier (13) which is movable against the carrier ring (6) of the gripper unit. It is also provided with a unit (16) for operating the gripper arms.