Filter bags having distance elements of progressively differing lengths, and method of forming same
AssigneeCamfil AB
InventorNiclas Karlsson
Life of this patent
Estimating the term…
Abstract
Method for the fabrication of filters with deep folds connecting of opposed sides of the filter to prevent blow-out, by welding intermediate distance elements to the filter material on each side. The distance elements include bridges and/or connections between parts welded to the difference filter sides. The bridges are extendable to different lengths at different locations in the filter.
Claims6
A filter constituted by folds or bags of filter material where the opposed sides of the bags are connected by distance elements, wherein the distance elements are made of sheet material which is welded to both sides of the filter in the fold, said sheet material being punched along curved or angled lines with remaining distance elements between opposed bag sides so that the distance elements due to their curvature can become longer when straightened so that they upon deployment of the filter can be drawn out or extended to a greater length than the distance between the welds at the welding.
Dependencies are inferred from the claim text.