An in-line laminar flow motionless mixer mixes a low viscosity fluid into a high viscosity fluid. A first conduit section receives the high viscosity fluid and has a first set of slots. Injector nozzles extend into the first conduit section ahead of the slots with orifices which add the low viscosity...http://www.google.es/patents/US5597236?utm_source=gb-gplus-sharePatente US5597236 - High/low viscosity static mixer and method