Appeal No. 1998-2537
Application 08/680,602
and grit paper (3) bonded together by means of a thermosetting
adhesive. The lay-ups are then placed in a suitable press
which may comprise heated upper and lower platen members, to
which pressure may be applied (col. 3, lines 31-41). The
secondary reference to Huber discloses a method for
manufacturing a sound absorbing grinding wheel comprising a
plurality of grinding layers (1) comprising abrasive grains,
filler and a binder; at least one dampening layer formed by
foils (2), preferably butyl rubber; and a reinforcing tissue
(3). The method comprises pouring and flattening a layer of
grinding mixture (1) in a mold (5) and inserting a foil (2)
lined with reinforcing tissue (3). More grinding mixture (4)
is poured thereon and another layer of foil (2) and
reinforcing tissue (3) may be placed thereon and repeated as
desired. This lay-up is then compressed in the
mold (5) to create a grinding wheel blank (7). After removing
the grinding wheel blank (7) from the mold (5), the blank is
clamped between clamping plates (6) and cured. Huber notes
(col. 2, lines 66-68) that the clamping plates (6) are
5
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