Pleated filter and method and apparatus for fabricating same

Details Pleated filter and method and apparatus for fabricating same Pleated filter and method and apparatus for fabricating same

1984-02-13

1986-06-10

Fisher, Richard V.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

55487, 55498, 55521, 55DIG5, 156205, 156210, 156474, 2104933, 2104935, 210506, 264287, 264507, 425369, 493 43, 493 44, B01D 2706

Patent

active

045941629

ABSTRACT:
A filter for separating constituent components of fluids includes a plural-layer sheet-like member which is multiply pleated to provide layers of the same or different porosity or to provide structural support layers for pleating a soft or membrane-like filter layer. The multiple layers may be pre-joined or delivered from individual locations to a pneumatic conveyor passage of predetermined cross-section through which the adjacent layers are conveyed by a conveyor gas. The layers are crimped to form pleats by withdrawing the material at a lower linear speed than that at which it is supplied to the passage. Pleating is facilitated by venting the conveyor gas at a passage section of enlarged cross-section. The pleating material is subjected to a hot gas, such as steam, and then cooled by a cooling gas to effect bonding of the layers in the pleated state.

REFERENCES:
patent: 2954036 (1960-09-01), Schur et al.
patent: 3313665 (1967-04-01), Berger
patent: 3377220 (1968-04-01), Berger et al.
patent: 3552400 (1971-01-01), Berger et al.
patent: 3774508 (1973-11-01), Berger et al.
patent: 3867294 (1975-02-01), Pall et al.
patent: 4099943 (1978-07-01), Fischman et al.
patent: 4390031 (1983-06-01), Berger
patent: 4422939 (1983-12-01), Sharp et al.

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