Appeal No. 96-3613
Application 08/335,496
cylindrical projection (specification, page 9) and that the
geometry of the foam dispensing passage and sealing cylindrical
projection, inter alia, are such as to clear the dispensing
passage and screen upon opening without any degradation in
performance in producing foaming (specification, page 10). As
discerned throughout the specification (pages 13 and 14, and page
16), the focus is upon sealing engagement of the projection with
the “interior” surface of the dispensing passage, i.e., the
cylindrical sealing exterior surface 60 seats against the
cylindrical “interior” surface of the dispensing passage
(specification, page 14). It appears to us that the undisclosed
embodiment would require the lock to engage some structure (a
pair of molded keepers, for example) on the inner (interior)
surface of the dispensing passage downstream of the orifice and
screen. In our opinion, the aforesaid structure (molded on the
interior surface) which, of course, remains on the inner surface
when the door is in opened position and the dispenser is in use,
may reasonably be expected to effect some degree of degradation
in performance in producing foaming, contrary to appellant’s
expressed expectation for the disclosed dispenser (specification,
page 10). Thus, the undisclosed embodiment would not appear to
us to have been contemplated by appellant within the framework of
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