Filter element
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United States of America Patent
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-
Feb 24, 1998
Grant Date -
N/A
app pub date -
Dec 24, 1996
filing date -
Dec 26, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A filter element made of nonwoven filter fabric includes a plurality of pleated portions and a flange portion formed integrally with the filter portion. The flange portion is formed by a pair of press-forming dies to have a thin and compressed connecting portion formed along the outer periphery of the filter portion, a thick and uncompressed seal portion formed along the outer periphery of the connecting portion and a thin and compressed protecting portion formed along the outer periphery of the seal portion.
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