Filter element

US4579658A · kind A · utility

Inventor

• Klaus Moller · Mutterstadt, DE

Key dates

• Filing date: Jun 16, 1983
• Grant date: Apr 1, 1986
• Expiry date: Jun 16, 2003

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D46/10
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a sheet-like filter element comprising a porous or fibrous filtering layer and a pair of opposite cover layers, these cover layers are maintained in tight engagement with the outer surfaces of the filtering layer by means of transversely extending connecting strings. The filter element may, for example, be used as a filter for a gas venting opening in a stoma bag, and in that case the porous filtering layer contains a big amount of finely granulated activated carbon. The connecting strings maintain the cover layers pressed against the filtering layer so as to avoid any tendency to delamination of the filtering layer and formation of undesired spaces or passages therein.