Yes, very sad news. I´ve met him on a number of occasions, as he set up his stand at practically every German-speaking show going, and also used to visit the Llanfair 16mm exhibition every two years, as well.
After a very nasty accident at home a couple of years ago, he was just beginning to get back to his old self, always available for a technical chat, but not a man for unnecessary small-talk.
We can only hope that the sons and the rest of the family continue to run the business in the innovative (and slightly eccentric) fashion that he did.