Device and method for the filtration of viscous material

Details Device and method for the filtration of viscous material Device and method for the filtration of viscous material

2006-02-07

2006-02-07

Savage, Matthew O. (Department: 1724)

Liquid purification or separation

Processes

Separating

C210S387000, C210S418000, C210S445000, C210S447000, C425S197000, C425S561000

Reexamination Certificate

active

06994795

ABSTRACT:
An apparatus for filtering viscous material, in particular thermoplastic synthetic plastic material, comprises a screw (24), which presses the material to be cleaned from an upstream conduit (3) of a supply housing (2) towards a band-shaped screen (4). The screen (4) is abutted on its downstream side by a perforated plate (6) against the pressure of the supplied material. The band-shaped screen (4) can be displaced for replacement of a soiled band section by a fresh band section. For facilitating this displacement a device is provided, which comprises a closure means (30) that is disposed on the upstream side of the screen (4), by which closure means the upstream conduit (3) for the material to be filtered can be closed at least substantially. On the upstream side of this closure means (30) a storage space (36) for material to be cleaned is connected to the upstream conduit (3). Within this storage space (36) a piston (38) is sealingly guided, which is reciprocable by a drive means and closes in its projected position the storage space (36) against the upstream conduit (3).

REFERENCES:
patent: 3706827 (1972-12-01), Nott et al.
patent: 4410477 (1983-10-01), Claude
patent: 4842750 (1989-06-01), Britchi
patent: 0 221 355 (1987-05-01), None
patent: 0 976 525 (2000-02-01), None
patent: 08156072 (1996-06-01), None

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