Method of forming a fibrous mat
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United States of America Patent
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-
Oct 31, 1995
Grant Date -
N/A
app pub date -
Sep 16, 1993
filing date -
Sep 16, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of producing a nonwoven fiber glass mat that contains discrete areas which are of different construction than the remainder of the mat. The permeable forming screen onto which a fibrous aqueous slurry is deposited is of a different structure in areas corresponding to the discrete areas of the mat so as to restrict the flow of water through those areas. Less fiber is deposited in those areas, resulting in the discrete areas being comprised of a thinner mat. The orientation of fibers within the discrete areas can be controlled by correlating the restricted flow of slurry in these areas to the flow of slurry necessary to cause this condition.
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