Appeal No. 1999-2062 Page 2
Application No. 08/928,311
BACKGROUND
The appellants' invention relates to a method of
manufacturing a grinding roll. An understanding of the
invention can be derived from a reading of exemplary claims 13
and 26 (the independent claims on appeal), which are
reproduced below.
13. 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 such that
the solid material is pulverized through the coaction of
the grinding roll 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
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 of a plurality of rib members extending in
the longitudinal direction of the body portion with the
spacing between adjacent ones of the plurality of rib
members being established as a function of an angle
passing through the center of the grinding roll and
wherein this angle X is defined as:
X = ARC COS [((O.5)(DM)) - ((.375)(ECD)]
(O.5)(DM)
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