Appeal No. 2006-2084
Reexamination Control No. 90/006,360
Figure 1 of the '400 patent is reproduced below.
Figure 1 shows a prior art small-shank tool. The cutting tool 1 in Fig. 1
includes a rectangular-shaped shank 2 having a width of 8 mm, and a
rhomboidal-shaped insert 3. The tool insert 3 is defined by an inscribed circle (not
illustrated), which is approximately equal to the width of the shank. The shank
defines a single tool-supporting edge 5 for engaging and supporting a
corresponding edge of the tool insert. One of the problems is that if the insert is
torqued in the clockwise direction, the tool insert may become relatively easily
dislodged on the shank. It is stated that industry has attempted to overcome this
problem by providing another smaller supporting edge 5' on the opposite side of
the tool insert relative to the first supporting edge 5. However, because of the size
and location of the second supporting edge, it provides little additional support and
has proven to break away relatively easily.
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