Debrie Charts or Pilots

This system, unique to Debrie printers, consists in a film band that runs
synchronously with the film being printed but at 1/8 of the speed of the
original. A hole in the film band marks the place where the light change
takes place and triggers the light change mechanism to operate.

This method can be used on several Debrie Matipo contact and optical
printers. It can be very useful when the original should not be notched
or when the original is damaged and notching is impossible.