Appeal No. 1999-0231
Application No. 08/472,354
plate vacuum hold down system including a cylinder having
either circumferential grooves 11 (Fig. 1) or axial grooves 22
(Fig. 2), we know of no reason why one of ordinary skill in
the art would have been motivated to substitute the axially
extending grooves disclosed in Arkell, which are connected to
a vacuum within the mounting cylinder to maintain a printing
plate in position during operation of the printing press, for
the circumferential grooves
10b disclosed in Figure 1 of Fellows, which are connected to
pressurized air inside the printing cylinder to expand a
printing sleeve during mounting of the sleeve on the cylinder.
Along this same line, it is not absolutely clear to us that
the axially extending grooves 22 in Arkell, which are
interconnected by a single circumferential groove 24 to the
interior of the cylinder, would successfully perform the
function of the circumferential grooves 10b in the embodiment
shown in Figure 1 of Fellows.
In our view, the only suggestion for combining the
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