US Patent 8418739 Heat seal machine with open throat

A press is described having an upper platen. The press includes one piece base for support an upper rotatable support arm and a lower cantilever support arm. The upper support arm is adapted to selectively move the upper platen between an open position, a partially open position and a closed position with respect to a lower platen. A lower cantilever support arm configured to provide an open working surface around a lower platen. A sliding mechanism disposed on the base to selectively move the lower platen to an open, partially open or closed position.