Stock material or miscellaneous articles – Structurally defined web or sheet – Honeycomb-like
Patent
1984-02-29
1985-09-03
Epstein, Henry F.
Stock material or miscellaneous articles
Structurally defined web or sheet
Honeycomb-like
52806, 181292, 428138, B32B 312
Patent
active
045392447
ABSTRACT:
Broad band noise attenuation sandwich panels utilizing a cellular core positioned between and bonded to two facing sheets by an adhesive bonding system. One facing sheet is perforated and the other imperforate. A thin sheet of porous fibrous felt or fabric is bonded to the outer surface of the perforate sheet. The adhesive layer, at least between the perforate sheet and the porous fibrous material, is sufficiently thick to isolate the two components and form a funnel shaped opening necked down at the entrance to each perforation.
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Beggs Stanley L.
Lawson Dale W. R.
Riel Frank J.
Epstein Henry F.
Gilliam Frank D.
Rohr Industries, Inc.
Schlesinger Patrick J.
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