Whiteboard and phone camera works quite well for recording what was doodled in a problem solving meeting. Your vertical roller version with digitiser suggests

Whiteboard and phone camera works quite well for recording what was doodled in a problem solving meeting. Your vertical roller version with digitiser suggests the use of a continuous loop of dry marker roller (this used to exist as canvas painted with a heavy paint that could take dry marker pens. The paint used to crack after some years though) so after being scanned, the marks are erased...