1973-12-06
1976-05-18
Jenkins, Robert W.
259DIG30, B29B 106
Patent
active
039572552
ABSTRACT:
A machine for processing thermoplastic materials and in particular for extruding thermoplastic materials having a casing including two generally opposing surfaces of which the temperature is controlled and which at least in part define an enclosed working chamber, an inlet for introducing material into the working chamber and an outlet for leading processed material away from the working chamber, a rotor mounted for rotation within the casing and having a plurality of blades disposed between the said surfaces of the working chamber with adjacent blades separated by an open space defined by the adjacent blades and portions of the two surfaces of the working chamber, each blade including generally oppositely directed first and second surfaces with the first blade surface closely confronting one of the surfaces of the working chamber to form a first region of shear and with the second blade surface closely confronting the other surface of the working chamber to form a second region of shear, the blades being so shaped to transport material from the inlet to the outlet during rotation of the blades between the generally opposed surfaces of the working chamber and serving, in use, to produce multiple shearing action and mixing action and improved heat transfer in the material contained in the spaces during transport action and processing thereof from the inlet to the outlet.
REFERENCES:
patent: 1192492 (1916-07-01), Blichfeldt
patent: 1988743 (1935-01-01), Kenzie
patent: 2015056 (1935-09-01), Barnes
patent: 2612354 (1952-09-01), Dron
patent: 2705131 (1955-03-01), Ross
patent: 3682447 (1972-08-01), Zucker
patent: 3845938 (1974-11-01), Schold
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