It wasn't just Versatec plotters that used this mixture - standard office photocopiers also had clay-coated paper and liquid toner. I don't know what allowed the change to plain-paper copiers (which use an intermediate photosensitive drum, like a laser printer) but it was probably the expiry of a patent, maybe Xerox's.
On Sun, Apr 14, 2024 at 8:02 AM Paul Anderson via cctalk < cctalk@classiccmp.org> wrote: > I have a Versatec interface here somewhere, but I don't remember if it is > for an 8 or 11. > > Paul > > On Sun, Apr 14, 2024 at 1:40 AM Tony Duell via cctalk < > cctalk@classiccmp.org> > wrote: > > > On Sat, Apr 13, 2024 at 10:48 PM Jon Elson via cctalk > > <cctalk@classiccmp.org> wrote: > > > > > Yes, there were a number of Versatec models for different > > > paper sizes and pixel density. > > > > Does anyone else have one in their collection? > > > > I have an ICL-badged V80 which has a GPIB interface to link it to a > > PERQ. I also have the schematics, etc for the plain V80 but nothing on > > the GPIB interface (ether user or service data). IIRC the V80 is based > > round a Texas 16-bit microprocessor with some AM2900-series sequencers > > and ROMs to control the electrode timing. > > > > As Jon said in the bit I deleted, there's a 'nib electrode' under the > > paper and a segmented backing electrode above it. The charge image is > > built up on the paper, then the toner is flowed over it and the carbon > > (I assume) particles adhere to the charged bits. No drying heater in > > mine. > > > > -tony > > >
