EMI air filter
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United States of America Patent
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N/A
Issued Date -
N/A
app pub date -
Dec 1, 2004
filing date -
Sep 4, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides electromagnetic interference filters and gaskets. In exemplary embodiments, the filters and gaskets are made from conductively coated reticulated foam having a pore density varying from 10 to 40 pores per inch (PPI). The filters can be used to cover ventilation openings in an electronics enclosure to shield electrical components, equipment and devices from EMI, electrostatic discharge (ESD) and radio frequency interference (RFI) while still providing adequate airflow to enter and cool the system. The filter material may also help prevent dust and dirt from entering the enclosure. The filters of the present invention are also well suited to conductively bridge gaps between mating features of electronic enclosures. The reticulated foam to fabricate the filters allow for excellent compression (generally 20%-50% of the original thickness) under low compressive forces, while easily recovering from the compressive load without noticeable compression set (permanent deflection).
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