History of a Remarkable Mixer

At the beginning of the Inversina are Paul Schatz & the Oloid. Paul Schatz (1898, Konstanz, Germany - 1979) was a German-born sculptor, inventor and mathematician Paul Schatz discovered in 1929 that the Platonic solids could be inverted. In particular the Invertible Cube, elaborated in accordance with the respective laws, and its specific, rhythmic mobility were to become the basis upon which Paul Schatz was to build his later work.
His most famous invention, the Oloid, became the object of Swiss Patent no 500,000 as a «device to generate a tumbling motion». If the Oloid rolls down a slightly inclined surface, you will be able to perceive the typical, rhythmically pulsing movement in a novel way.*
*Please also see the website of the Paul Schatz Society, www.paul-schatz.ch for more information.

The Inversina is the technical realization of the Oloid: the edges of the mixing container in a 50L model equipped with light fixtures and a time exposure camera makes this visible:

The challenge of building a mixer with the Paul-Schatz Principle caught the attention of Bioengineering AG, the Swiss Technology Firm that invented and still manufactures the Inversina. The idea was intriguing, but the task wasn’t easy: it took a team of engineers and mathematicians more than one year to derive the exact formulas and parameters that allowed for the Inversina to work. Finally, after many sleepless nights, the 2L model was born, followed by the 20L, the 50...350L Inversinas and the manual Inversina.