Filter bag for pocket air filters
AssigneeKluge-Luftfilter GmbH
InventorKlaus Kluge
Life of this patent
Estimating the term…
Abstract
A filter bag for pocket air filters has two abutting side parts which are made of an air-permeable filter material that is weldable by ultrasound. The side parts are continuously welded to one another in side edge portions on three sides of the side parts so that a pocket having two opposite side edges, a bottom edge and an opening opposite said bottom edge is formed. Several webs made from a flexible material web are formed in the pocket. The webs connect the side parts to one another and are orientated from an opening side of the filter bag in the direction of the bottom edge. The flexible material web is alternately connected—at least in portions—to one of the side parts in each case in weld portions. The weld portions are delimited by at least one weld across the direction of flow.
Claims8
A filter bag for pocket air filters
- having two abutting side parts which are made of an air-permeable filter material that is weldable by ultrasound,
- wherein the side parts are continuously welded to one another in side edge portions on three sides of the side parts, so that by way of two side parts welded to each other, a pocket having two opposite side edges, a bottom edge and an opening opposite said bottom edge, is formed,
- wherein in the pocket three or more webs are formed from a flexible material web,
- wherein the webs join together the side parts and extend from an opening side of the filter bag towards the bottom edge,
- wherein the flexible material web is alternately connected to the side parts in staggered weld portions, the weld portions being delimited by at least one weld longitudinally to the direction of flow, so that the flexible material web is connected to the weld portions in a zig-zag pattern,
- wherein the webs are formed by web portions of the flexible material web and the web portions run, in each case, between two adjacent weld portions, by which the flexible material web is connected to two opposite side parts,
- wherein, in each case, a web portion width of the web portions defined by one length of a web portion between the side parts decreases from the opening side to the bottom edge, and
- wherein one weld portion width of at least one weld portion increases from the opening side in the direction of the bottom edge.
Dependencies are inferred from the claim text.