Using a sausage tying machine - GIF

Using a sausage tying machine.

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Previously:

Chicken sausage production - GIFs
Sausage link cutting and tying machine - GIF
Sausage linker - GIF
Sausage stapler - GIF
World record sausage maker - GIF

I can't make out what he is doing with the string, but as elaborate as that machine appears, it seems he has too much fiddling to do for each tie off.

The machine crimps on a metal ring...