Appeal No. 1998-1308
Application No. 08/469,397
board is characterized by three series of linear indentations.
The indentations of each series are parallel and intersect the
other indentations at an angle of 60 degrees. The
indentations are useful in allowing volatile products to vent
from the sandwich panel during bonding.
Claim 1 reproduced below is further illustrative of the
claimed subject matter.
A rigid foam board for fabrication of sandwich panels
made from two face sheets bonded one each over each side of
said foam board, comprising:
a polyurethane foam board having opposed planar faces, at
least one of said faces having embossed therein a pattern
having three series of parallel linear indentations, each of
said series intersecting the other two series and lying at an
angle 60° angularly offset from the other two series;
said indentations being sufficiently deep and close
together to provide escape paths for volatiles generated
during said bonding, whereby said face sheets may be bonded
over said polyurethane foam board and said escape paths vent
said volatiles and prevent the development of excessive
pressure between said face sheets that otherwise would
interfere with said bonding.
The references of record relied upon by the examiner as
evidence of anticipation and obviousness are:
Wolf 4,188,428 Feb.
12, 1980
Brambach 4,826,723 May 2,
1989
2
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