Appeal No. 1998-2537
Application 08/680,602
Appellant’s invention is directed to a method of
manufacturing a depressed center abrasive wheel having a
thickness of less than three thirty-seconds (3/32) of an inch.
The method comprises the steps of combining metered abrasive
grains (12), metered liquid resin (14), and other grinding
aids (16) into a hopper, which is then transferred into a
mixing chamber. This mixture and layers of fiberglass (26) or
equivalent reinforcing materials are provided in press cavi-
ties (24) of a hydraulic press having mating platens (22)
having flat surfaces to create flat “green” wheels. The flat
“green” wheels are then taken out of the press and disposed
between metal plates (32), each having a depressed wheel
center portion which clamps the flat “green” wheel and forms
the depressed center portion of the “green” wheel (Figure 3).
This clamped assembly is then cured to produce the final
depressed center abrasive wheel product. Claim 1 is represen-
tative of the subject matter on appeal and a copy of that
claim may be found in the Appendix to appellant's brief.
2
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