Cylindrical filters and their manufacture

Details Cylindrical filters and their manufacture Cylindrical filters and their manufacture

1992-12-03

1997-01-14

Yoder, Michele K.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156249, 156290, 1563084, 1563096, 55521, 2104931, 21049701, 428 346, 428181, B32B 3104, B32B 3120, B01D 2907

Patent

active

055935290

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.

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patent: 4963258 (1990-10-01), Yagishita
patent: 5015377 (1991-05-01), Silvera

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