Mixer

Apparatus for mixing two or more fluids to provide extensive mixing and kneading which leads to the formation of a homogeneous mixture in a relatively short length of the apparatus while creating only a small pressure drop, comprising in combination:

• an elongate casing defining a through-bore of substantially uniform cross-section throughout for at least a major extent thereof;
• at least one pair of helically twisted strips in which one strip is twisted in right-hand direction whereas the other strip is twisted in left-hand direction, said strips being disposed in side-by-side nested and interfitted relation whereby to define fluid flow paths which periodically merge and then separate along the length of said strips;
• said strips being housed within said casing within the section thereof which is of substantially uniform cross-section and said casing tightly enclosing said strips whereby to confine said fluid flow paths and enhance intermingling and mixing of fluids passing therethrough.