Apparatus for making melt-blown filtration media having integrally co-located support and filtration fibers
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United States of America Patent
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Mar 31, 1998
Grant Date -
N/A
app pub date -
Jul 2, 1996
filing date -
May 2, 1995
priority date (Note) -
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Abstract
The apparatus is provided to make a melt blown fibrous medium and includes first and second melt blowing dies for respectively issuing first and second streams of melt blown fibers along first and second melt blown paths. The first and second streams are issued on a forming surface where the streams are collected to form a melt blown fibrous medium. A movable transfer surface is interposed between the first die and the forming surface in the first path so that the first stream of melt blown fibers impinges on the transfer surface in advance of the forming surface such that the first stream is transferred to and brought into contact with the second stream of melt blown fibers on the forming surface.
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