Hope this is not considered OT. Please think of it as home automation, & there's quite a few posters on this group with a wide experience of mechanical processing machines.
Over the years I've tried quite a few ways of speeding up the process of (de)stringing red and black currants, none very successful. IMHE it can take 3or 4 hours to string.just half an hour's picking.
Freezing them and then rolling or stirring to try to knock the stalks off didn't work. Immersing them in water to separate out the chaff & dud berries gave reasonable results, but the cook doesn't like wet fruit. Rolling them over a board with holes to allow singletons to drop through is only moderately successful.
So...any ideas please?
Anyone know how it is done commercially?
The fruit is destined for the freezer & will then used in pies, desert fruit stews & jam later in the year. So an outcome with perfect looking fruit is not essential, though turning it into a puree is a no-no.
BTW the fruit has not been sprayed, so washing is not required, especially as it will be cooked anyway before eating.
TIA