Patent ID: 7931842

Claim:
A system for making sheets, films, and objects comprising: a reactor-dryer for reacting at least one monomer to produce a polymer melt; a flash melter in communication with the reactor-dryer for heating the polymer melt received from the reactor-dryer; a flash tank in communication with the flash melter for removing volatile compounds from the polymer melt; and a control loop in communication with the flash tank for controlling the pressure of the polymer melt from the flash tank to a die forming unit, wherein the control loop includes a first, second, and third pump and a distribution manifold, the die forming unit includes a first and second die, the first pump located after the flash tank but before a distribution manifold, the second pump located between the distribution manifold and the first die, the third pump located between the distribution manifold and the second die, and the first die and second pump and the second die and third pump are separate legs of the system interconnected with the manifold, wherein the first, second, and third pump function in unison to control the pressure in the control loop, the first pump maintains the pressure into the manifold, and the first pump is responsive to the pressure at the second and third pumps and increases the pressure if the pressure drops in the second pump.