Appeal No. 95-2880
Application 08/091,294
maintained, within the definition of that term as used by the
appellant. That is, rotating the spout during use is not
explicitly contemplated by Colin, and to do so would cause it to
screw on or off of the mixer to which it is attached. Colin
clearly does not attach the spout by means of a bead and groove
connection, as is required by the appellant's claim 1.
The Yu reference discloses a single cartridge caulking gun
that has a detachable nozzle. Like Colin, the nozzle 84 in the
embodiment shown in Figure 3 is attached to the dispensing nipple
86 by means of screw threads. As was the case with Colin, it can
be inferred that the nozzle is sealingly, but not rotatably,
attached to the nipple. In the alternative embodiment shown in
Figure 1, however, the nozzle 12 is attached to the end of the
discharge nipple 22 by means of a connection comprising a
circular bead 26 provided at the dispensing end of the nipple and
a corresponding groove 50 provided in the mounting end of the
nozzle. Although not explicitly set forth, the nozzle would
appear inherently to be rotatable on its bead and groove
connection to the same extent as would be the appellant's
attachment, and we note that such a conclusion is not
contradicted in the text. From our perspective, the Yu
connection also must be sealingly maintained on the nipple, or
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