Accordion filter with a protective mask

US6299660A · kind A · utility

Assignee

• Firma Carl Freudenberg · DE

Inventors

• Peter Pfeuffer · Ketsch, DE
• Hans-Joachim Lippold · Berlin, DE
• Markus Fronhofer · Karlsruhe, DE
• Hans Leibold · Ettlingen, DE

Key dates

• Filing date: Jan 17, 1997
• Grant date: Oct 9, 2001
• Expiry date: Jan 17, 2017

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2265/06
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A filter element that is able to be sealingly secured in position in a filter housing, comprising an accordion fold pack. The oncoming-flow side of accordion fold pack is covered by a latticed protective mask. The protective mask is sealingly joined to all fold backs of accordion fold pack on the clean-air side. In this manner, the fold edges are protected from damage during the periodic cleaning in the face of the back-blasted air used for that purpose.