As the counterpart to printing presses, some automated book scanners also work that way-- puffer to separate the pages, vacuum paddle to flip them: https://www.

As the counterpart to printing presses, some automated book scanners also work that way-- puffer to separate the pages, vacuum paddle to flip them: https://www.youtube.com/watch?v=GmGntnfohrA https://www.youtube.com/watch?v=GmGntnfohrA