Here is a very fancy film slitter for slitting 35mm film from cassettes into 2 Minox format films. Designed 40 years ago. It is designed to be used in an infrared glove box so that all operations can be monitored on a TV screen. A film cassette is loaded on the left side and film is advanced through the cutter blades using the switch on the front of the unit. Films are then attached to the take up spools on the right. Once the that is done the switch on the front panel is switched to spool and the machine automatically slits to the pre selected length. A Minox cassette is then placed over the film spools and the film trimmed. Then it is taken off the spool and the encapsulated is placed over the cassette. That film can now be removed and finished off in daylight. The machine was mounted on a tilted base as the IR camera was mounted above the machine. I'll see if I can make a video in operation if I can get around to it.
If you have any questions please feel free to just ask. This machine spooled 10s of thousands of Minox films.