Appeal No. 95-2880
Application 08/091,294
the lack thereof (see In re Sovish, 769 F.2d 738, 742, 226 USPQ
771, 774 (Fed. Cir. 1985)).
The thrust of the appellant's invention is directed to a
sealing, rotatable snap-in mounted attachment to the mixing tube
of a mixer. As manifested in claim 1, the invention is presented
as a mixer for a dispensing apparatus having a double cartridge,
comprising means for mounting an attachment in the form of a
circular bead provided at the dispensing end of the mixer and a
corresponding groove provided in the mounting end of the
attachment, the bead and the groove having such dimensions that
the attachment is "rotatably and sealingly" maintained on the
mixer.
The first rejection of this claim is that it is unpatentable
over the combined teachings of Colin, Yu and Yoshioka. We view
Colin as an example of the device over which the appellant
believes his invention to be an improvement. Colin discloses a
dispensing apparatus having two cartridges which provide
materials to a mixer 16. At the dispensing end of the mixer is a
spout 32, which is attached by a threaded connection. While it
can be assumed that the spout is "sealingly" maintained on the
mixer as required by claim 1, or else it would be inoperable
because of leakage, it does not appear to be "rotatably"
5
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