Appeal No. 1999-0272 Page 7
Application No. 08/605,212
and moved by an upper shear arm 32; a lower blade 24 carried
and moved by a lower shear arm 34; the upper and lower shear
arms 32 and 34 are both rotatably mounted upon a common freely
rotating shaft 38 which serves as a pivot for the arms 32 and
34; a gear box 36; crank arms 40 and 42; gears 56 and 58;
pivot pins 44 and 52; link arms 46 and 50; and pivot pins 48
and 54. Ward teaches (column 4, lines 7-11) that "[i]t is
quite evident in the mechanical drive shown that rotation of
the crank arms 40 and 42 will drive the link arms 46 and 50
which in turn will force the upper and lower shear arms 32 and
34 toward the centerline 26." Ward also teaches (column 3,
lines 42-54) that the drive shown in Figure 3 use the
mechanism of U.S. Patent No. 3,736,826. From Figure 3 and 3
U.S. Patent No. 3,736,826 it is clear that Ward teaches that
gears 56 and 58 are driven by a single motor.
Gurevich discloses a shear for the cutting of batches of
glass mass. As shown in Figures 1 and 2, Gurevich's shear
includes a first knife 7 arranged on upper lever 6; a second
3A copy of this patent is attached for the appellants'
convenience.
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