Food-safe permanent repair (re-join them) of 2 tines of metal (stainless steel?) whisk/beater of electric stand-mixer?
I have a 34 year old stand mixer (Sunbeam Mixmaster) which uses 2 separate beaters (whisks) to mix ingredients in a bowl while it rotates. The beaters each have 4 tines which are joined with a rivet where they intersect at the tip of the beater/whisk (see photos. The broken beater is the one on the right). On one of the beaters two of the tines have come apart (broken) at the rivet so I can't re-rivet to repair. I believe the metal is steel (maybe stainless although there is some rust on the metal - they ARE 34 years old). What can I do to permanently re-attach the broken tines at the tip, that is food-safe and doesn't add bulk to that spot? (the beaters interlock with each other while rotating so they have to be the same height or else they won't interlock correctly while spinning). The mixer works fine otherwise and I am reluctant to buy a new one because the comparable ones that are available are built much more cheaply than this one was (very flimsy, lots of plastic instead of solid metal body) and I don't want to buy an expensive, large and bulky Kitchenaid-type mixer which is more than I need for the amount of baking that I do. Thanks for any suggestions!