cash register tape

[Don Y]

David Griffith wrote:
> I'm pretty sure I could design and build a paper tape punch and reader
> that uses plain old cash register tape and winds the tape on old microfilm
> spools.  Assuming the sprocket and data holes match standard paper tape,
> what are some other caveats to look out for?

You don't even need to have a "sprocket" engage the holes.
Use a friction roller and just make sure it always moves
*forward* constantly (trivial with the sorts of electronics
available nowadays) without slipping backwards, etc.