Abstract: Extensible gripper for clamping plastics material plates on thermoforming apparatus for on-line thermoforming the plastics material plates, in which supporting assemblies support slidably with respect to a central body, sliding blocks which can be driven to project from the side of the central body, thereby providing the gripper with a length which can amount to twice the length of the central body, while providing the required gripping mechanical force on the head portions of the plastics material plates.
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