Fluid handling – Systems – With pump
Patent
1987-08-12
1988-07-05
Chambers, A. Michael
Fluid handling
Systems
With pump
137340, 137428, 137566, 101364, 210181, 210197, F16K 4900
Patent
active
047547790
ABSTRACT:
A printing press liquid circulation system of the type wherein the liquid is circulated in a closed path to and from one or several fountain pans of the press by means of a pump. The system is characterized by the provision of an upright filter chamber, the lower section of which is connected to the suction side of the pump, said chamber being provided with a filter medium intermediate its ends, the return conduit of the fountain paths opening in the upper section of the filter chamber above said filter medium. A liquid make-up and proportional mixing system is provided to maintain at a predetermined level the liquid in the lower section of the filter chamber. Air cannot enter the liquid and, therefore, the formation of foam, either in the fountain path or in the pump and filter chamber lower section, is prevented. Preferably, the discharge of the pump is connected to a heat exchanger to maintain the liquid at the required temperature.
REFERENCES:
patent: 2128263 (1938-08-01), Ofeldt
patent: 2851053 (1958-09-01), Wollner et al.
patent: 3511378 (1970-05-01), Goregliad
patent: 4011157 (1977-03-01), Pinnebalcer, Jr. et al.
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