Firma Carl Freudenberg

Carl Freudenberg Kg

Dieter Hintenlang

Udo Michaelis

Dieter Unrath

Ulrich Schlor

Margit Hofmann

Klaus Leister

Richard Borris

Verena Hücker

A filter cartridge made of an accordion fold pack folded in a zigzag-shaped manner and made of a thermoplastically moldable and heat-sealable material, whose folds are held at an adjusted, defined distance relative to each other, in particular made of a nonwoven fabric. The longitudinal direction of the accordion fold pack, transversely to the folds, the individual fold peaks are folded over in the same direction in at least one strip on one or both sides of the accordion fold pack and in each case fixedly joined to the next following, likewise turned-down fold at least in the overlapping region, by heat-sealing.

Filter cartridge made of an accordion fold pack folded in a zigzag-shaped manner and method for its manufacture

A flexible folded filter insert which is not noticeably deformed by the air which it cleans. The insert has a fold pattern which is closed off at the ends by flexible strips which can be compressed in the longitudinal direction.

Flexible folded filter insert

A pocket filter includes a front frame which accommodates at least two filter bags. The top of each bag accommodates a reinforcing frame. The bags are secured dust-tight to one another, to the reinforcing frames, and to the front frame. The front frame is a severed at at least one point along its perimeter. The front frame has a U-shaped channel around it that opens inward, and the reinforcing frames can be inserted into the channel when the front frame is open at the severed point. The reinforcing frames match each other and match the size of the front frame, creating a dust-tight contact between all the adjacent reinforcing frames and the inner surface of the channel when the front frame is closed at the severed point. Facing webs, disposed in the channel opening on each side of the 'U', create a dust-tight contact with the reinforcing frame.

Pocket filter

Growing community of inventors

Absteinach, Germany

Dieter Hintenlang