Machine for assembling spring units for mattresses

Claim 1

A MACHINE FOR ASSEMBLING GROUPS OF COIL SPRINGS IN SIDE-BY-SIDE RELATIONSHIP, COMPRISING: A FRAME; A PAIR OF BEAMS DISPOSED ONE ABOVE THE OTHER AND MOUNTED ON SAID FRAME FOR RELATIVE MOVEMENT BETWEEN AT LEAST TWO POSITIONS OF SPACING BETWEEN SAID BEAMS; POSITIONING MEANS FOR MOVING AT LEAST ONE OF SAID BEAMS BETWEEN SAID POSITIONS; A PLURALITY OF CLAMPING DEVICES MOUNTED ON EACH OF SAID BEAMS AND EACH ADAPTED TO RECEIVE AND GRIP ONE SIDE OF THE END OF COIL SPRING; ACTUATING MEANS FOR SAID CLAMPING DEVICES; A NORMALLY HORIZONTAL WORKPIECE-SUPPORTING PANEL MOVABLY MOUNTED ON SAID FRAME FOR HORIZONTAL MOVEMENT; A CARRIER MOUNTED ON SAID FRAME FOR HORIZONTAL MOVEMENT ABOVE SAID SUPPORTING PANEL; A HOLD-DOWN BAR ASSEMBLY HAVING A PORTION EXTENDING ADJACENT THE UPPER OF SAID BEAMS, SAID BAR ASSEMBLY BEING MOUNTED FOR LIMITED VERTICAL MOVEMENT ON SAID CARRIER; SHIFT ACTUATING MEANS FOR INDUCING RELATED HORIZONTAL MOVEMENT OF SAID PANEL AND SAID CARRIER; COIL-DRIVE MEANS MOUNTED ON EACH OF SAID BEAMS; AND CONTROL MEANS FOR SAID ACTUATING, POSITIONING, AND DRIVE MEANS.