Method of and apparatus for producing a foam-forming reaction mi

Measuring and testing – Specific gravity or density of liquid or solid – With weighing feature

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G01N 902

Patent

active

041955277

ABSTRACT:
The invention relates to a method of and an apparatus for producing a foam-forming reaction mixture of at least two liquid components which react together and which are fed continuously to a mixing zone where they are mixed together. The volumetric flow of at least one component is measured continuously both in the main pipe leading to the mixhead and also in a subsidiary pipe which branches off the main feed line between the storage for the components and its pump. This subsidiary stream serves as a source for intermittent weighing of the component so that the density of the reaction component can be periodically calculated and monitored. This helps ensure the proper mass of component entering the mixhead.
An apparatus is disclosed which achieves precise dosing of the components so that a product free of defects and having the desired properties may be produced.

REFERENCES:
patent: 2708360 (1955-05-01), Geer et al.
patent: 3050145 (1962-08-01), Lane
patent: 3151775 (1964-10-01), Whitehead
patent: 3308991 (1967-03-01), Glassey
patent: 3541863 (1970-11-01), Barron et al.
patent: 3848618 (1974-11-01), Royse

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