Appeal No. 1996-2703
Application 08/339,637
49), and states that “[t]he achievement of such properties
when bonding to honeycomb requires an adhesive that not only
exhibits strength properties in the cured state, but that
also, when first heated, has flow and other characteristics
necessary to wet and form a fillet along the contacted edge
portion of the honeycomb” (col. 2, lines 50-55). McKown also
states that the adhesive provides a processing benefit as
follows (col. 3, lines 34-61):
In the completely uncured state, the adhesive is a
flowable particulate which can be readily removed
from undesired areas by means of a vacuum tool.
Upon subjection to temperatures above about 120E F.
and below the cure temperature, the adhesive enters
an agglomerated, fused state in which it adheres
strongly to the substrate to which it is applied and
yet is not tacky or sticky enough to cause
individually treated substrates to stick together
during storage or shipment. Moreover, in this
state, the treated parts can be manipulated into the
bonding position without the need for careful
precautions to insure precise initial matching. The
adhesive can remain in this fused adherable, non-
tacky, curable state for extended periods of time at
temperatures less than about 90E F.
Because of this stability in an adherable state, it
is now possible for the manufacturer of the basic
structural elements, e.g., the manufacturer of panels and
honeycomb structures, to pre-coat such elements with the
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Last modified: November 3, 2007