Helical wound tube

Details Helical wound tube Helical wound tube

1992-12-09

1995-10-24

Dawson, Robert A.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

2104971, 2104972, 493299, 493941, 156190, 156195, 55520, 55DIG5, B01D 2706

Patent

active

054607213

ABSTRACT:
A helically wound tube made of at least two sheets of preperforated flat roll paper material. Each sheet is helically wound in edge abutting relation such that one longitudinal edge of the sheet abuts the other longitudinal edge of the sheet to form a ridgeless seam. Some of the perforations of the subsequently wound sheets overlap some of the perforations of the previously wound sheets to form a reinforced cylindrical tube having perforations that permit radial flow through the cylindrical tube.

REFERENCES:
patent: 1792797 (1931-02-01), Armstrong
patent: 2070073 (1937-02-01), Walton
patent: 2115577 (1938-04-01), Goldman
patent: 2354481 (1944-07-01), Russell
patent: 2549363 (1951-04-01), Blickman
patent: 3769128 (1973-10-01), Manjikian
patent: 4101423 (1978-07-01), Merrill et al.
patent: 4717374 (1988-01-01), Elias
patent: 4760949 (1988-08-01), Elias
patent: 4863602 (1989-09-01), Johnson
patent: 5001819 (1991-03-01), Harrop
patent: 5039413 (1991-08-01), Harwood et al.
patent: 5230726 (1993-07-01), Smith et al.

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