History of The Szego Mill

Laszlo Szego - Toronto 1960s
Laszlo Szegő - Toronto 1960's
Mor Sattler - Nagykanizsa 1940s
Mor Sattler-Szegő - Nagykanizsa 1942

The Szego Mill was invented by László Szegő, the son of a Hungarian industrialist and crude-oil merchant, during the 1960s and ’70s.

László was the oldest of a number of brothers who, with their father Mór, ran various manufacturing and research concerns in the family’s large factory complex in Nagykanizsa.

Szego family factory in Nagykanizsa
Szego family factory in Nagykanizsa - 8,000 sq. m. / 86,000 sq. ft.
Szego Jeno - Nagykanizsa Factory Stationery
Szego Jeno - Nagykanizsa Factory Stationery

Built in the 1930’s and partially destroyed in WWII, the complex included dormitories for employees of a metal recycling scrapyard and foundry which advertised itself as offering the services of "Master Locksmiths; Manufacture and general repairs of gasoline and raw gas engines, tractors, pumps, industrial and agricultural machinery; Rolling mills and grinding, gear milling; Iron and metal foundries; Autogenous and electric welding"

The business also conducted metallurgical research and provided design services for external firms.

László and his brother József and their respective sons Daniel and Andrew (all successful inventors with patents of their own) continued their innovative work upon emigrating to Toronto after the Hungarian Revolution of 1956.

Early Szego-Family Ball Mill Patent - 1899
Early Szego-Family Ball Mill Patent - 1899

Following in the footsteps of his great-uncle Károly Sattler's Ball Mill patent of 1899, László patented a number of mill designs from the mid-1950’s to the late 1970’s. During this time he teamed up with Prof. Dr. Olev Träss of the Department of Chemical Engineering and Applied Chemistry at the University of Toronto. Together they made significant improvements to the device and began research which would prove its ground-breaking abilities.

In his later years, László often raised money by selling powdered tungsten and other metals processed in the Mill at a high premium. The powders were so fine that they would float into a metallic cloud upon opening a vial of the products.

Early Szego Mill Patent Drawings
Early Szego Mill Patent Drawings

After László’s death in 1975, Dr. Träss continued his work and formed General Comminution Inc., a Toronto company which manufactured the Mill while continuing extensive research into it’s capabilities and uses. Dr Träss's research produced over 100 published papers. His research & development proved the Mill's capabilities far beyond what László had originally imagined, leading to a number of patented processes that could only have been made possible by this invention.

David Szego
David Szegő
Prof. Dr. Olev Träss
Prof. Dr. Olev Träss

László’s great-nephew David was born that same year, and Szegő & Träss have once again teamed up to bring László’s invention — with 40 years of research and improvements — into production to see its full intended capabilities brought to life for the benefit of the global marketplace.

Szego Materials Engineering