Apparatus for dosing and mixing fluid reactants

Claim 1

Apparatus for dosing and mixing at least two fluid reactants, comprising a. a dosing unit comprising a housing containing dosing cylinders arranged side by side which are connected to storage containers for the reactants through pipes, and a yoke on which dosing pistons corresponding to the cylinders are arranged and which is provided with a drive, and b. a mixing head with mixing chamber and outlet aperture, said mixing chamber containing an ejection control member comprising a piston adapted to traverse the mixing chamber so that in a first position said ejection control member allows the reaction components to enter said mixing chamber and in a second position said ejection control member allows the reactants to return to said storage containers, and c. conduits connecting the dosing unit to the mixing head characterized in that the housing of the dosing unit and the mixing head together form a rigid block with the conduits connecting the dosing cylinders with the mixing chamber in the form of channels inside this block.