> On Jan 22, 2018, at 4:08 PM, Noel Chiappa via cctalk <cctalk@classiccmp.org> > wrote: > >> From: Grant Taylor > >> What makes the copies of papers printed on them special? > > Well, the Dover was the first device (that I know of) that could print _very_ > high-quality graphical/multi-font output, and on ordinary paper. It was also > pretty darned fast - a couple of seconds per sheet, IIRC. The whole package > just blew us all away (I was a MIT when we got ours). > > There was a prior device (from quite a few years before) called a 'Xerox > Graphics Printer', but i) IIRC it printed on thermal paper (think > poor-quality thermal fax paper); ii) the resolution was nothing like as high > as that of the Dover (which was, IIRC, in the 100's of DPIs - which it needed > to produce the very-high quality printout with type-faces), and iii) it was > quite slow.
The XGP printed on roll paper. It was a laser type process and used a modified Xerox copy engine. It had a cutter to cut the roll paper to size (computer controlled natch). The cutter caused *no* end of troubles. AFAIR it wasn’t particularly slow given the output quality. Ours at CMU was driven by an 11/45. All of the CMU docs produced by the CS department were printed by the XGP (and typeset by Scribe). I still have various docs (including my copy of the Hydra Songbook) and they look quite good. TTFN - Guy
