I was told 60 LPS (so 3600 LPM) for the IBM 3262 belt printer that was
attached to the AS/400 (don't know what model, but it was one of the
oldest 3-19"-racks-full ones) in my first ever IT job.
No idea whether that's accurate, mind... what I do know is that the
thing could basically consume boxes of paper as fast as you could load
them into it :-)