Melt pump seal with vacuum housing

Details Melt pump seal with vacuum housing Melt pump seal with vacuum housing

1982-06-04

1984-05-08

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 3, 277 12, 159 2E, F16J 1540

Patent

active

044470614

ABSTRACT:
A method and apparatus for preventing fluid leakage through a sealing mechanism of a melt pump into a vessel during the period of establishing a vacuum therein and increasing the viscosity of the material fed thereto. The method includes enclosing in a fluid-tight relationship the area of fluid leakage adjacent the sealing mechanism and reducing the pressure in the enclosed area sufficiently to prevent the fluid from leaking. The apparatus includes a rigid housing which encloses in fluid-tight relationship the area of fluid leakage adjacent the sealing mechanism, a vacuum generating device, and means for connecting the vacuum generating device with the enclosed area.

REFERENCES:
patent: 701957 (1902-06-01), Staley
patent: 1037647 (1912-09-01), London
patent: 1590778 (1926-06-01), Schein
patent: 2973187 (1961-02-01), Wehmer
patent: 3036335 (1962-05-01), Heston et al.
patent: 3144035 (1964-08-01), Hablanian et al.
patent: 3361537 (1968-01-01), Ferrante
patent: 3795386 (1974-03-01), Carter et al.
patent: 3797550 (1974-03-01), Latinen
patent: 3993292 (1976-11-01), Skidmore
patent: 4118042 (1978-10-01), Booth
patent: 4191385 (1980-03-01), Fox

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