Appeal No. 1999-2081
Application 08/786,228
means for introducing a flow of water to said first
inlet;
means for introducing a flow of water to said first
inlet;
means for introducing a flow of said polymer to said
second inlet;
a plug disposed outside said mixing chamber and
shaped to seal said outlet orifice along said seat; and
means for yieldable biasing said plug against said
outlet orifice peripheral seat;
whereby the flow of the mixed water and polymer
exerts a force against said plug which causes said plug
to move away from said outlet orifice seat against the
force exerted by said biasing means so as to provide a
gap between said plug and said outlet orifice seat which
results in the activation by shearing of polymer passing
through said gap.
In support of the rejection, the examiner relies on
the
following prior art:
Brooks 1,925,787 Sept. 5, 1933
Lavine 2,124,580 July 26, 1938
Robinson 2,817,500 Dec. 24, 1957
Hendrikz 4,199,267 Apr. 22, 1980
Brazelton et al. (Brazelton) 5,135,968 Aug. 4, 1992
Claims 1-9 and 11 stand rejected under 35 U.S.C. §
103 as being unpatentable over the combined disclosures
of Brazelton taken with Robinson, Hendrikz, Brooks, and
Lavine.
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