专利名称：Cylindrical filters and their manufacture发明人：Michael Grimes申请号：US07/642652申请日：19910117公开号：US05185190A公开日：19930209
摘要：A cylindrical filter is formed from a sheet of filter material which includes twoconnected layers of filter media. Opposed edges of the sheet are joined to form thecylinder by separating the media adjacent the edges and then sealing together the firstof the separated layers followed by sealing the second of the separated layers. The twoseals 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.
申请人：PALL CORPORATION
代理机构：Leydig, Voit & Mayer
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