Filter element, device for folding a filter medium web and process for producing a zigzag-folded filter element

US9486719B2 · kind B2 · utility

Assignee

• MANN+HUMMEL GmbH · DE

Inventors

• Stefan Walz · Freiberg, DE
• Mario Keller · Bad Endorf, DE

Key dates

• Filing date: Mar 19, 2014
• Grant date: Nov 8, 2016
• Expiry date: Mar 19, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2201/127
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A filter element has a multi-layered filter medium web with several layers that is folded along folding lines. The filter medium web has at least one functional region in at least one section located between adjacent folding lines. The at least one functional region is a first embossment. The layers of the filter medium web are firmly bonded to each other along the first embossment. A device for folding a multi-layered filter medium web has an energy-introducing embossing unit that embosses the filter medium web fed by a feed unit to the embossing unit. A folding unit for folding the filter medium web along folding lines is provided. The energy-introducing embossing unit embosses and firmly bonds the layers of the filter medium web along at least one functional region in at least one section of the filter medium web located between adjacent folding lines.