Parallel folded filter
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United States of America Patent
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-
Nov 26, 2002
Grant Date -
N/A
app pub date -
Jun 22, 2000
filing date -
Oct 16, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A parallel folded filter has good sealing properties between the folded filter web and the filter housing with the smallest possible amount of sealant. The filter is prepared with an elliptical filter blank, in which the rows (1) of fold lines (locations of predefined fold edges or imaginary fold edges) are at right angles to an axis (4) extending in the direction of the greatest longitudinal extension of the filter blank (2). The circumferential contour of the filter blank (2) is dimensioned such that it assumes a circular shape with the folds stood up (e.g., in a folded state). An adhesive bead (3) is applied along the circumferential contour. A ring-shaped filter housing accommodates the folded filter blank (2) such that a circumferential support surface is present for the adhesive bead (3).
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