Feeder for apparatus for ejecting a mixture of a plurality of li

Details Feeder for apparatus for ejecting a mixture of a plurality of li Feeder for apparatus for ejecting a mixture of a plurality of li

1977-09-12

1979-05-15

Scherbel, David A.

Dispensing

Plural sources, compartment, containers and/or spaced jacket

With discharge assistant for each source

219307, 219309, 222146HE, B67D 562

Patent

active

041543688

ABSTRACT:
A feeder for apparatus for ejecting a mixture of liquids, e.g. urethane foam, comprises a pair of swash plate proportioning pumps one individual to each of the liquids, e.g. resin and isocyanate, each proportioning pump being fed by a gear pump from a supply of the respective liquid. Seepage along the drive shafts of the isocyanate pumps is continuously removed by bathing them in a recirculating stream of flushing agent. The swash plate and gear pumps and flushing agent pump are all driven by a single motor from a common chain drive. The liquids are heated during passage through separate hoses to a common dispensing head or gun, by immersed coil electric resistance heaters extending lengthwise freely within the hoses. A novel control system is provided for the hose heater circuit, the adequacy of the liquid supply and other operating conditions.

REFERENCES:
patent: 2669299 (1954-02-01), Roach
patent: 2716179 (1955-08-01), Cornella
patent: 3263932 (1966-08-01), Ruland
patent: 3614389 (1971-10-01), Malisza
patent: 3976230 (1976-08-01), Sperry
patent: 4034203 (1977-07-01), Cooper

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