Appeal No. 1999-2062 Page 3
Application No. 08/928,311
wherein: DM = the mean diameter of the grinding roll
ECD = the estimated depth of solid material the
mean diameter of the grinding roll.
26. A method of manufacturing a grinding roll in order
to thereby improve the energy efficiency thereof, the
grinding roll being of the type employed in a pulverizer
having a grinding surface therewithin having solid
material disposed thereon wherein the grinding roll is
operative to coact with the grinding surface, comprising
the steps of:
a. forming from a first type of material a body
portion embodying the configuration of a frustum of a
right circular cone;
b. providing on the body portion an external portion
formed of a second type of material and having a pair of
opposed axial ends, one of the opposed ends having a
relatively smaller diameter than the other opposed end;
and
c. providing on the exterior of the external portion
a tread surface capable of producing a gripping action
therefrom sufficient to eliminate slippage between the
grinding roll and the grinding surface, the tread surface
being formed by a plurality of rib members
circumferentially spaced from one another on the external
portion and each rib member extending in the axial
direction of the external portion and extending radially
outwardly from the external portion at a height which
decreases in the direction from the smaller diameter end
of the external portion toward the larger diameter end of
the external portion.
The prior art reference of record relied upon by the
examiner in rejecting the appealed claims is:
Hunt 1,009,520 Nov.
21, 1911
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