Filter element and method of making a filter element
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United States of America Patent
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Jun 13, 1989
Grant Date -
N/A
app pub date -
Sep 3, 1987
filing date -
Sep 9, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A filter element comprises a relatively rigid fluid-permeable cylinder (5), around which is provided a body (7) of non-woven fibrous filter material. A jacket (6) of permeable material is positioned around the outer surface of the filter material, and is heat-shrunk onto the filter material in order to hold this under substantially uniform radial compression over the whole of its area.
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