Alonzo H Searl

US Patent:

44515863, May 29, 1984

Filed:

Jun 30, 1982

Appl. No.:

6/393973

Inventors:

Alonzo H. Searl - Fort Worth TX
Granville J. Hahn - Big Spring TX
Raleigh N. Rutledge - Big Spring TX

Assignee:

Cosden Technology, Inc. - Dallas TX

International Classification:

C08J 900
C08J 902

US Classification:

521 88

Abstract:

Process and apparatus are disclosed for manufacturing foamed articles such as tubes used as pipe insulation, which tubes are of a high impermeability and flexibility and are formed of a polymer, such as polyethylene or polypropylene, containing up to about 25% of an elastomer.

US Patent:

45267367, Jul 2, 1985

Filed:

Jun 30, 1982

Appl. No.:

6/393910

Inventors:

Alonzo H. Searl - Fort Worth TX
Granville J. Hahn - Big Spring TX
Raleigh N. Rutledge - Big Spring TX

Assignee:

Cosden Technology, Inc. - Dallas TX

International Classification:

B29D 2700

US Classification:

264 53

Abstract:

Process and apparatus are disclosed for manufacturing foamed articles such as tubes used as pipe insulation, which tubes are of a high impermeability and flexibility and are formed of a polymer, such as polyethylene or polypropylene, containing up to about 25% of an elastomer.

US Patent:

46216782, Nov 11, 1986

Filed:

Mar 2, 1984

Appl. No.:

6/585658

Inventors:

Granville J. Hahn - Big Spring TX
Raleigh N. Rutledge - Big Spring TX
Alonzo H. Searl - Fort Worth TX
Walter E. Sommerman - Fort Worth TX

Assignee:

Cosden Technology, Inc. - Dallas TX

International Classification:

F25B 2900
F28F 2702
B30B 1534
B29C 4572

US Classification:

165 27

Abstract:

Disclosed is heat exchange apparatus for controlling the temperature of a resin after leaving an extruder and prior to extrusion through a die in an extrusion process, comprising a heat exchanger having an inlet and outlet for an extruded heat-plastified resin and an inlet and an outlet for a heat exchange medium to be circulated in heat exchanging relationship with the extruded resin; a selective heater for receiving the heat exchange medium from the heat exchanger, the heater heating the heat exchange medium to a predetermined temperature during a start-up phase of the heat exchange device; a cooler adapted for receiving a portion of the heat exchange medium from the heater, the cooler including an inlet and an outlet for the heat exchange medium and an inlet and an outlet for a cooling medium to be circulated in heat exchanging relationship with the heat exchange medium; control means interposed between the heater and the cooler for selectively directing a portion of the heat exchange medium to said cooler in response to a sensed temperature condition and for directing the balance of the heat exchange medium to the heat exchanger; and a pump for circulating the heat exchange medium between the heat exchanger, the heater, and the cooler.

US Patent:

47132710, Dec 15, 1987

Filed:

Jun 24, 1983

Appl. No.:

6/507373

Inventors:

Alonzo H. Searl - Fort Worth TX
Granville J. Hahn - Big Spring TX
Raleigh N. Rutledge - Big Spring TX

Assignee:

Cosden Technology, Inc. - Dallas TX

International Classification:

B32B 3100

US Classification:

428 36

Abstract:

Process and apparatus are disclosed for manufacturing foamed articles such as tubes used as pipe insulation, which tubes are of a high impermeability and flexibility and are formed of a polymer, such as polyethylene or polypropylene, containing up to as much as 50% of an elastomer.