Filter Medium for a Fluid
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United States of America Patent
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Issued Date -
Apr 24, 2008
app pub date -
Aug 27, 2005
filing date -
Sep 2, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to a filter medium in the form of a wound filter with a number of adjacent tubular flow channels (5, 6) with a radial flow, which are formed from a double-layered filter web material of which one layer has a smooth embodiment and the other is corrugated. The aim of the invention is to provide the above with a simple and hence economically-produced seal, by means of which the above may repeatedly be exchangeably inserted in a filter device with a seal with little complexity. Alternatively and optionally additionally the end regions for sealing of the filter web material which forms the wound filter should permit a simplified and reliable sealing. The above is achieved by means of a material wherein felt is provided on the external circumference of the wound filter as sealing material for a radial seal within a housing. Furthermore, the amplitude of the corrugations of the corrugated layer of the filter web material in the circumferentially terminating end regions can be embodied to taper gently towards the end and are produced accordingly.
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