Abstract: A nozzle box assembly for use in apparatus for supporting and guiding a horizontally moving web of sheet material comprises an elongated housing defining an elongated, first chamber which extends centrally and axially of the housing. Second and third chambers are located on opposite sides of the first chamber and extend parallel thereto. The second and third chambers each include an elongated discharge nozzle slot extending parallel to the first chamber and discharging on opposite sides of a Coanda surface. Pressurized gas is supplied to the first chamber and a first and a second plurality of flow openings in the housing respectively act to conduct gas from the first chamber to the second and third chambers in a particularly uniform manner. First and second independently operable valves are mounted in the housing for controlling gas flow through the first and said second plurality of flow openings to thereby control flow to the second and third chambers and from the discharge nozzle slots.

Abstract: A nozzle box assembly for use in apparatus for supporting and guiding a horizontally moving web of sheet material comprises an elongated housing defining an elongated, first chamber which extends centrally and axially of the housing. Second and third chambers are located on opposite sides of the first chamber and extend parallel thereto. The second and third chambers each include an elongated discharge nozzle slot extending parallel to the first chamber. Pressurized gas is supplied to the first chamber and a first and a second plurality of flow openings in the housing respectively act to conduct gas from the first chamber to the second and third chambers in a particularly uniform manner. First and second independently operable valves are mounted in the housing for controlling gas flow through the first and said second plurality of flow openings to thereby control flow to the second and third chambers and from the discharge nozzle slots.

Abstract: An accumulator extrusion head assembly for producing a parison having at least one stripe extending longitudinally thereof comprises an extrusion head body member having an opening extending inwardly from a nozzle outlet end and a mandrel positioned in the body member to define a generally annular extrusion chamber terminating in an annular outlet nozzle. An annular ram is mounted in the extrusion chamber and has a forward end positioned for reciprocation toward and away from the outlet nozzle. A first supply extruder is connected to the body member through first passages for supplying a first extrusion material to the annular extrusion chamber. A second supply extruder is also connected to the body member through second passages for supplying a second extrusion material to the annular extrusion chamber.

Abstract: A regenerative system for purifying mixtures of air and impurities by a combination process. The system includes a plurality of fixed bed regenerative heat exchangers connected to a common combustion chamber. Each of the heat exchangers includes means for diverting selected portions of the gases flowing therethrough out of heat exchange relationship with the heat exchange packing or bed therein. This permits the system to operate with incoming air-impurities mixtures containing high levels of combustibles without generating undesirably high temperatures or changing the mass flow rate through the system.

Abstract: An injection molding apparatus includes a plasticizer (A) for plasticizing plastic pellets. An accumulator head (B) includes a plasticized material receiving entrance (40) for receiving the plasticized material. A mandrel (14) is disposed centrally within the outer body such that an annular cavity (12) is defined therebetween. A ram assembly (16) is mounted in the annular cavity for longitudinally reciprocating motion therein. Reciprocation of the ram assembly urges accumulated plasticized material through a downstream die (C). The ram assembly includes an outer ram member (30), an intermediate ram member (34), and an inner ram member (36). The ram members define a first passage array (60) between the intermediate and outer ram members and a second passage array (70) between the inner and intermediate ram members.

Abstract: A printing belt extends around a rotatable cylinder having independently rotatable belt drive sprockets at the opposite ends thereof. A torque-assist drive connected with the cylinder is selectively operable for imparting supplemental traction to the belt for preventing relative slippage between the belt and drive sprockets.