Dispenser for mixing then dispensing multiple components

A dispenser comprising:

• at least two parallel, hollow cylinders for supplying different mutually reactive components to a mixing device located downstream of said cylinders;
• a respective first piston moveable in each of the cylinders and displaceable by a piston rod connected to the respective piston;
• said pistons rods being interconnected for simultaneous dispensing of the components contained in the cylinders, when the piston rods and pistons are displaced in the cylinders towards a respective outlet therein;
• and
• a means for actuating the pistons rods to perform a forward stroke of the pistons in their respective cylinders for dispensing an amount of said reactive components to the mixing device,
• said actuating means comprising a spring member adapted to act on the piston rods, and a manually operable brake member for controlling the force of the spring acting on the piston rods, wherein said actuating means further comprises:
• at least one rotatable member biased in a rotational direction by a torsion spring, and
• at least one flexible string attached, at a first end thereof, to the rotatable member so as to be wound thereon, and at a second end thereof to an element connected to the piston rods, wherein the manually operable brake member is arranged to normally act on the rotatable member to hold it still, but, when deactivated, adapted to release the rotatable member to thereby wind the string upon the rotatable member while simultaneously causing the pistons to perform a forward stroke for dispensing the reactive components to the mixing device.