Metered spray dampening system

Abstract From the Canadian patent

Ab~tr~ct, _. A ~ultiple ~pr~y noz~le~ orr~et press da~penlng 8y8te~ or the type havlng lndl~ld~al ~eterlng pu~p~ ror the respectlve noz~le~ utilize~ ~ devl~e ~or opening the pu~p output vslvea ~hlle ~alntalnlng ~a~penlng liquld reed pressure substantl~lly elev~ted, thzreby purglng reed llnes pump p~s~ge~, ~ays ~nd pu~p cha~ber~ o~ bubbles a~d p~rtlcles ~hlch Yould interrere ~ith ~ccuratc ~terlng. Con~tant reclrculatlon and ~ilteri~e o~ the ~eed liquld ~nde~ pressure ~ain~ainB purglng llquld subst~ntl~lly bubble and partlcle rree.