Working station of a machine processing plate elements

A working station for a machine for processing plate-like elements, the working station comprising:

• a frame;
• a working tool supported on the frame and onto which a plate-like element may be arranged;
• a gripper bar extending transversely of the working tool and including an element for seizing the leading edge of a sheet of plate-like element as it is advanced over the working tool;
• a flexible drive device attached to the gripper bar for advancing the gripper bar and thereby advancing the plate-like element;
• a drive for the flexible drive device and supported on the frame;
• the gripper bar being movable toward the working tool and with respect to the flexible drive as the gripper bar crosses the downstream end of the working tool during advancing of the flexible drive and the gripper bar;
• at least one transverse link axle connected with the flexible drive;
• a cam sensor movable toward and away from the working tool;
• a lever arm connecting the at least one link axle with the cam sensor and the cam sensor being swivellable about the at least one link axle, a pull-back device for maintaining the lever arm and the cam sensor in a determined position about the at least one transverse link axle;
• a gripper bar lowering cam attached to the frame and extending in the feed direction of the plate-like element and having a cam surface placed to intersect the trajectory of the cam sensor as the flexible drive device and the cam sensor are advanced to the feed direction, the cam surface being-positioned that upon contacting the sensor cam, the cam surface swivels the cam sensor toward the working surface and swivels the gripper bar and the sensor cam about the at least one link axle for temporarily moving the gripper and the leading edge of the sheet toward the working tool.