>I plan to implement an automatic Arduino/Raspberry-Pi based loader, it should read ~12 lines (~24 Octal chars) per second.
You might be interested in some work that has been done in high speed video capture from inexpensive Raspi-cameras, e.g.
This works by restricting the pixel field to a small "area of interest" stripe only, but that's perfect for your purpose of course.
Wouldn't it be great as well to have a printer then that could output paper "tape" of some form that could then be read-in again with this machine?
Just to recreate the old-time experience in a better way than using USB sticks as stand-ins for paper tape!