Appeal No. 1998-0331
Application No. 08/297,257
locations about the spindle carrier. The spindle carrier is
supported in a headstock (Fig. B-7) which includes first and
second walls, the first of which faces a gearbox, having a
throughbore for receiving the spindle carrier. As to the
spindle carrier bearings, at section B, p. 14, the reference
teaches that "[t]wo wide spindle carrier journals housed in
the rugged headstock frame and a heavy bearing in the gearbox
section rigidly supporting the stem end provide a three-point
bearing for the carrier system." See, also, Fig. B-13.
The examiner describes Fig. 1 of the DT '799 reference as
teaching a "first spindle bearing and a second spindle
bearings [sic, bearing] each having a set of tapered roller
bearings disposed in the headstock (12)" (see final rejection,
p. 2 and answer, p. 5).
Burka discloses a machine tool including multiple rotary
spindles for holding workpieces W. Each rotary spindle member
12 is mounted in a spindle carriage 34 that is rotatably
mounted to a stationary support structure 30 by means of heavy
duty
bearings 44 mounted in stepped portions of support structure
30. See Fig. 3 and col. 5, ll. 17-19. Additionally, the
-7-
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