For particular applications, Vigouroux offers specific parts to be mounted on its binders.
Catch-up thread clamp
Allows the thread to be picked up again each time the clamp is closed (part n°19NRATT)
Warning: only mount on the clamps adapted in the factory to support the catch-up.
To see some videos :
Without automatic clamp :
http://youtu.be/6KcX8oA5eG4
http://youtu.be/FTote5nDovc
With automatic clamp :
http://youtu.be/zY6Vs9QhKy4
http://youtu.be/6NQeEd5M7gU