Plastic feeding device and method

Details Plastic feeding device and method Plastic feeding device and method

1991-04-24

1992-03-17

Thurlow, Jeffery

Agitating

Rubber or heavy plastic working

With specified feed means

26421121, 264349, 366182, 425145, 425DIG5, B29C 3100, B29C 4710

Patent

active

050963023

ABSTRACT:
A method and apparatus for regulating the flow of plastic particulates to the opening of a cylinder of a plasticating screw. The particulate pass through a feed throat disposed at a feed opening of the drum. A valve mechanism disposed in the feed throat includes upper and lower members connected by pivot means. A fulcrum is located below the pivot means and the lower member bears on the fulcrum. The upper member is moved up or down which in turn causes the lower member bearing on the fulcrum to swing about the pivot means to open or close the valve. As the valve is closed, the lower member moves downwardly towards the rotating screw to prevent flooding with particulates of the feed opening of the cylinder.

REFERENCES:
patent: 1362928 (1920-12-01), Debay
patent: 2760232 (1956-08-01), Rougemont et al.
patent: 3360824 (1968-01-01), Schippers
patent: 3468518 (1969-09-01), Koch
patent: 3553786 (1971-01-01), Bentley
patent: 4154535 (1979-05-01), Maillefer
patent: 4652226 (1987-03-01), Chevroulet et al.
patent: 4728475 (1988-03-01), Beck
patent: 4783300 (1988-11-01), Grunwell
patent: 4863366 (1989-09-01), Kim
patent: 4937034 (1990-06-01), Sewell

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