Title: Extrusion device

Abstract: The present invention relates to an improvement in screw extrusion apparatus for handling resinous thermoplastic and similar materials, which has a portion of the length of the screw supplied with protuberances rising from the root of the screw and terminating in an outer surface spaced from the extruder bore giving intensive high shear treatment to the process material in the space therebetween with a dynamic volumetric treating capacity in this space greater than one and one half times the total throughput rate and between these protuberances passageways for separating and recombining of material to effect low shear high volume mixing.

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Inventors: Street, Louis F. (Washington, NJ, US)

Application Number: 511072
Filing Date: 1974-10-01
Publication_date: 1976-03-02
Assignee:
Primary Class(es): 425/208 366/90
Other Classes:
US Patent Ref:

2680879	Jun, 1954	Schnuck et al.	259/191.
3143768	Aug, 1964	Scherping	259/DIG.
3524222	Aug, 1970	Gregory et al.	425/208.
3652064	Mar, 1972	Lehnen et al.	425/208.
3661363	May, 1972	Aletti	425/208.

Other Refs: 350,112

Oct, 1905	FR

Primary Examiner: Smith, Al Lawrence
Assistant Examiner: Watson, Robert C.
Attorney: Kersey; George E.