Plastic article or earthenware shaping or treating: apparatus – With separate and distinct upstream agitating or kneading means – With cutting – severing or comminuting means
Patent
1975-05-06
1977-12-20
Husar, Francis S.
Plastic article or earthenware shaping or treating: apparatus
With separate and distinct upstream agitating or kneading means
With cutting, severing or comminuting means
425378R, 425380, B29B 106
Patent
active
040638600
ABSTRACT:
An apparatus for and method of employing a high percentage of reground polyethylene resin scrap in an extruder, wherein fluffy, low-density, polyethylene scrap resin is preferably admixed with a granular high-density polyethylene virgin resin, and the admixture fed by gravity into a first feed inlet in a screw-type conveyor, and granular polyethylene virgin resin fed by gravity into a second feed inlet generally adjacent to and downstream of the first feed inlet of the extruder. The admixture fed to the first feed inlet is insufficient to fill the volume of the extruder tube, while the virgin resin automatically fed by gravity fills up the total volume in the extruder tube, thereby preventing starvation of the resin to the extruder die in the event of blockage of the fluffy scrap resin, which technique permits high amounts of from 20 to 40% of scrap resin to be blended with virgin resin.
REFERENCES:
patent: 2366673 (1945-01-01), Paley
patent: 2912041 (1959-11-01), Boggs
patent: 3175807 (1965-03-01), Gouveia
patent: 3256562 (1966-06-01), Heard, Jr.
patent: 3520027 (1970-07-01), Amos et al.
Crowley Richard P.
Deerfield Plastics Co., Inc.
Husar Francis S.
Rosenbaum Mark
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