Cylindrical filters and their manufacture

Details Cylindrical filters and their manufacture Cylindrical filters and their manufacture

1992-12-03

1994-11-01

Nold, Charles R.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 57, 428 58, 428 59, 2104931, 2104932, 2104935, 21049701, 210489, 2103232, 210348, B01D 2907

Patent

active

053606507

ABSTRACT:
A cylindrical filter is formed from a sheet of filter material which includes two connected layers of filter media. Opposed edges of the sheet are joined to form the cylinder by separating the media adjacent the edges and then sealing together the first of the separated layers followed by sealing the second of the separated layers. The two seals are spaced inwardly of the edges and are spaced from one another. In this way, failure of one seal does not result in failure of the cylindrical filter.

REFERENCES:
patent: 2554157 (1951-05-01), Snyder
patent: 3865919 (1975-02-01), Pall et al.
patent: 4089783 (1978-05-01), Holyoak
patent: 4172797 (1979-10-01), Robichaud et al.
patent: 4184966 (1980-01-01), Pall et al.
patent: 4312648 (1982-01-01), Day
patent: 4578191 (1986-03-01), Jaffrin et al.
patent: 4609465 (1986-09-01), Miller
patent: 4747946 (1988-05-01), Ikeyama et al.
patent: 4963258 (1990-10-01), Yagishita
patent: 5015377 (1991-05-01), Silvera

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