| Patent Number |
Title Of Patent |
Date Issued |
| 5200204 |
Rotary extruder with integral auger feed assembly |
April 6, 1993 |
| A rotary extruder having an integral auger feed assembly operatively connected to the extruder barrel, the auger feed assembly being adapted to introduce feed material directly into the annular space between the rotor and barrel of the rotor extruder. The apparatus is particularly useful |
| 5045252 |
Method and apparatus for controlling rotary extruder |
September 3, 1991 |
| Method and apparatus for automatically controlling the operation of a rotary extruder, including using a pressure transducer (38, 40, 42) communicating with the annular space (50) between the barrel (12) and rotor (14) to monitor the hydraulic pressure of the melted polymer, using a |
| 4990233 |
Method for retarding mineral buildup in downhole pumps |
February 5, 1991 |
| A method for retarding non-corrosive mineral build-up and plugging in check valves utilized with downhole reciprocating rod pumps, comprising ion implanting or ion plating the interior facing metal surfaces of the check valve with a nonferrous metal or metal oxide. |
| 4974336 |
Drying method |
December 4, 1990 |
| A method for use in drying particulate matter employing a drier comprising a cylindrical upper section, a frustoconical lower section, a rotatable shaft extending substantially the entire length of the interior of the drier, a plurality of axially spaced arrays of circumferentially space |
| 4887907 |
Rotary extruder with internally cooled rotor |
December 19, 1989 |
| A rotor assembly for use in a rotary extruder, comprising a rotor rotatably mounted inside a barrel by means of drive and free end bearing assemblies; a coaxial longitudinal bore extending into the rotor from its free end; a sleeve within the bore defining a thermally insulated central z |
| 4879138 |
Composition for plastic article with unitarily molded foam layer |
November 7, 1989 |
| A moldable and foamable thermoplastic composition comprising a major portion of moldable polypropylene resin; from about 1.25 to about 6 parts per hundred of resin (pphr) foam concentrate; from about 0.15 to about 1 pphr calcium carbonate; from about 0.03 to about 0.15 pphr amorphous |
| 4872573 |
Plastic closure with barrier coating |
October 10, 1989 |
| A moldable plastic closure comprising a selectively foamed, unitarily molded layer and at least one layer of barrier resin adapted to retard the migration of oxygen-containing gasses through the closure. |
| 4866100 |
Composition for plastic article with unitarily molded foam layer |
September 12, 1989 |
| A moldable and foamable thermoplastic composition comprising a major portion of moldable polypropylene resin; from about 1.25 to about 6 parts per hundred of resin (pphr) foam concentrate; from about 0.15 to about 1 pphr calcium carbonate; from about 0.03 to about 0.15 pphr amorphous |
| 4839969 |
Drying method and apparatus |
June 20, 1989 |
| A method, apparatus and system for use in drying particulate matter employing a drier comprising a cylindrical upper section, a frustoconical lower section, a rotatable shaft extending substantially the entire length of the interior of the drier, a plurality of axially spaced arrays of |
| 4813863 |
Rotary extruder with a gear pump |
March 21, 1989 |
| Rotary extruder apparatus is provided comprising housing (22), recess (29) within housing (22), cylindrical rotor (30) rotatably mounted within recess (29) in housing (22), feed inlet (25), discharge outlet (52) providing fluid communication between recess (29) and diehead (26), in c |
| 4744478 |
Plastic closure with unitarily molded, foamed sealing layer |
May 17, 1988 |
| A molded polymeric container closure comprising at least one substantially unfoamed polymer layer and an integrally molded foamed layer of the same polymer. |
