Filter bag
AssigneeWolf Pvg GmbH & Co. KG
InventorsBrigitte Rosemeier, Wolfgang Czado
Life of this patent
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Abstract
A filter bag includes a first filter material layer including an inflow opening, a second filter material layer having edges along which the second filter layer is joined to the first filter material layer to form an inside space; and a flat, multi-layer filter insert arranged in the inside space and having sections connected, respectively, to the first and second material layers. The filter insert has at least two outer layers defining an intermediate area there between. The intermediate area includes a center layer or an intermediate space for dust collection.
Claims16
A filter bag, comprising:
- a first filter material layer including an inflow opening;
- a second filter material layer having edges along which the second filter layer is joined to the first filter material layer to form an inside space;
- a pre-filter comprising a flat, multi-layer filter insert arranged in the inside space and having sections connected, respectively, to the first and second material layers, the filter insert having at least two outer layers having a higher permeability for air than the first and second filter material layers and defining an intermediate area there-between, wherein one of the outer layers includes at least one opening on a side facing the inflow opening, and at a distance from the inflow opening, so that dust-laden air can flow into the intermediate area, and wherein the intermediate area includes one of a center layer or an intermediate space for dust collection.
The filter bag according to 1, wherein at least one of the outer layers of the filter insert include a plurality of small openings.
Dependencies are inferred from the claim text.