Patent ID: 6241378
Filing Date: 2001-06-05
Classification: D06F

Abstract:
An apparatus for dosing and mixing quantities of paste-form substances and a solvent in a preset ratio prior to dispensing, said apparatus comprising:a paste feed line for supplying paste to said apparatus;a solvent feed line for supplying a solvent to said apparatus, said solvent feed line including a solvent shutoff member for selectively interrupting the flow of the solvent through the solvent feed line;a dual piston control assembly including a piston plate adapted for movement between a first position and a second position, and first and second pistons each extending from one side of said piston plate;a dosing chamber in fluid communication with the paste and solvent fluid feed lines, said dosing chamber including an inlet through which the paste and the solvent enter, an outlet through which the mixture of paste and solvent exits for dispensing, and a dose size detector for detecting via conductivity measurement the presence of a preset dose of solvent and paste therein; anda first passage fluidly connecting the paste feed line with the inlet of the dosing chamber enabling fluid flow therebetween, and a second passage fluidly connecting the solvent feed line with the first passage configured for enabling high velocity jet-stream fluid flow therebetween, thereby inducing sufficient mixing between the paste and solvent, said first and second passages each being configured for receiving said first and second pistons, respectively, as the piston plate moves to the first position to close the corresponding fluid flows therethrough.