Plastic article or earthenware shaping or treating: apparatus – Stock pressurizing means operably associated with downstream... – Including heating or cooling means
Reexamination Certificate
2008-01-15
2008-01-15
Gupta, Yogendra (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Stock pressurizing means operably associated with downstream...
Including heating or cooling means
C425S380000, C425S382400, C425S467000
Reexamination Certificate
active
07318720
ABSTRACT:
The invention discloses an improved die assembly for the extrusion of thermoplastic resin cellulosic fiber composite profiles meant to minimize and substantially prevent the occurrence of melt fracture on the surface of the extruded composite profiles. Comprising the die assembly are a balanced flow passage having a heated compression zone, a heated transition zone, a heated converging die zone, a die land, which corresponds to at least a portion of the downstream end of the flow passage and is cooled to temperature below the melting point temperature of the thermoplastic resin. The invention also discloses a production process for composite profiles which includes the steps of providing resin and fiber, producing a composite compound, processing the compound through an extrusion system, extruding the compound through the die assembly to form the desired profile, cooling the profile and cutting it to length. Also disclosed are products produced by the production process.
REFERENCES:
patent: 3497915 (1970-03-01), Ronden
patent: 3792951 (1974-02-01), Meyers
patent: 3899276 (1975-08-01), Sokolow
patent: 4402898 (1983-09-01), Rosenbaum
patent: 4826422 (1989-05-01), Hunter
patent: 5082605 (1992-01-01), Brooks et al.
patent: 5088910 (1992-02-01), Goforth et al.
patent: 5096046 (1992-03-01), Goforth et al.
patent: 5261988 (1993-11-01), Dikis et al.
patent: 5516472 (1996-05-01), Laver
patent: 5725939 (1998-03-01), Nishibori
patent: 5759680 (1998-06-01), Brooks et al.
patent: 5851469 (1998-12-01), Muller et al.
patent: 6080346 (2000-06-01), Jack
patent: 6210616 (2001-04-01), Suwanda
patent: 6296465 (2001-10-01), Deutsch et al.
patent: 6527532 (2003-03-01), Muller et al.
patent: 6769899 (2004-08-01), Groeblacher et al.
patent: 2002/0180085 (2002-12-01), Rothemeyer
“Profile Extrusion of Highly filled Recycled HDPE”, Charlton et al., SPE ANTEC, May 2000, pp. 2914-2918.
Gupta Yogendra
Hill Nancy E.
Hill & Schumacher
Luk Emmanuel S.
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