Porous filter block and method of manufacturing the same

Details Porous filter block and method of manufacturing the same Porous filter block and method of manufacturing the same

1982-03-22

1984-06-05

Hart, Charles N.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

210499, 2105101, B23P 1500, B01D 3910

Patent

active

044519621

ABSTRACT:
A filter block for filtering melt synthetic plastic materials in a process of manufacturing plastics filaments includes a plurality of layers of wire fabric arranged in superimposed relationship. From the top to the bottom the filter block comprises inlet layers, intermediate layers and outlet layers. All the layers of the intermediate portion of the filter block are of identical mesh size which is smaller than mesh size of the inlet and outlet layers. The filter block is produced by cold forming exclusively in a stamp provided with an elastic suport for a pressure plate on which filter layers to be compressed are positioned and with a rigid support, which elastic support and rigid support operate successively to obtain inlet, intermediate and outlet filter layers of differing porosity.

REFERENCES:
patent: 798530 (1905-08-01), Rehfuss
patent: 1811987 (1931-06-01), Wales
patent: 2334263 (1943-11-01), Hartwell
patent: 3031827 (1962-05-01), Onstad et al.
patent: 3057481 (1962-10-01), Pall
patent: 3276597 (1966-10-01), Mesek et al.
patent: 3690606 (1972-09-01), Pall
patent: 3792519 (1974-02-01), Haver
patent: 4122015 (1978-10-01), Oda et al.
patent: 4126560 (1978-11-01), Marcus et al.

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