Cylindrical filters and their manufacture

Details Cylindrical filters and their manufacture Cylindrical filters and their manufacture

B - Operations, Transporting

01

D

26/160, 182/73,

B01D 29/13 (2006.01) B01D 29/01 (2006.01) B01D 29/11 (2006.01) B29C 53/40 (2006.01)

Patent

CA 2034521

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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