Re: Ah, spirit copiers.
Roneo and spirit copiers https://en.wikipedia.org/wiki/Spirit_duplicator (aka the Banda machine) were different things.
As a young lad, I recall my parents getting an electric spirit copier - just the same but it had a motor to do the hard work. Still needed the spirit tank filling, then the little lever pumping to wet the pad or roller, then leave it to soak, and then start up. The first few copies were feint until enough spirit had transferred to soften the ink on the master.
Where I used to work they had a Roneo type machine. They did several catalogues a year, and since this was pre-Euro, in quite a few currencies. The UK catalogue was priced, the rest came with a separate price list - done on the Roneo.
This one was an automatic model - looked like a copier, and *in theory* did all it's one master handling. Set the mode to "make master", it would scan the original (just like a copier) and then spit out one copy. Assuming that was OK, you then went into print mode, dialled in the quantity and set it off - at up to 130 copies/minute.
It had several issues - most of which relate to Tim W's argument about the benefits of advances.
The first and most obvious is that handling paper at 130 sheets a minute is not a trivial task. This was not a "set and forget" operation - someone had to supervise it so they could hit the stop button when (not if) the paper stopped piling up in the out tray. Once a single sheet failed to land properly, the whole thing just went into "fill the room" mode.
The second is the process doesn't make collated copies like modern digital copiers. You had to do a stack of page 1s, turn that stack over and do page 2 onto the page, then repeat with pages 3 & 4, and eventually end up with (say) 10 piles of paper. The whole sales dept would then collate these by hand - and it took all week to do several thousand copies of various lists.
The third issue was a matter of "something didn't work properly". I said that *in theory* it handled it's own masters. That meant unwrapping the old sticky inky one off the drum, making a new one, and wrapping the new one on the drum. It could make the new one OK, but if you didn't manually remove the old one (which was easy and clean as long as you just held the non-inky end) then it just ended up in a horrible sticky inky mess of shredded and jammed master - and no amount of "but I specifically told you to ..." would stop it being *my* fault and *my* problem to deal with.
Then the machine broke down, and this was in the early days of digital copiers. We got a shiny new digital copier, which also happened to be the printer nearest my desk - nice printer, A4, A3, duplex, folding, stapling, punching, and above all, collating. At first they'd use it as a copier, but I did a little bit of database work so they could select the catalogue & currency, hit print, set the right options and it would just spit out as many copies as they wanted - it just needed feeding with paper, staples, and from time to time, toner.
It cost more - each price list probably cost around 50p-£1p vs 10p - but it saved hundred of man-hours a year while also producing a better quality. It was also quicker because, while the copier was at first sight half the speed of the old machine - it did all the collating and stapling so the first copy was ready to use as soon as it came out without having to wait for it all to be printed and then collated.