Shearing apparatus with clamps for carrying and locking the material

A shearing apparatus (10) for a sheet material unwound from reels, said apparatus comprising:

• a working table (14) on which an endless moving tape (16) is wound and over which said sheet material is cut by at least one shearing head, said working table being supported by a support frame (12);
• a first clamp for the temporary stabilization of said sheet material comprising a top bar (18) overlapping a bottom bar (20);
• and
• a second clamp upstream from said first clamp for advancing said sheet material and comprising a top bar (32) extending above the tape(16) and cooperating with a plurality of undulying blocks (34) aligned in a crosswise direction which alternate with a plurality of laths (36) aligned in a longitudinal direction, said blocks (34) and laths (36) being arranged in a support tank (22) and forming a support frame for said moving tape (16), said first and second clamps being disposed along a least a crosswise extended zone of said sheet material arranged on the moving tape (16).