[GreenKeys] how did the ap and upi teletypes motor on and off? i do not see extra stuff

[Jim Haynes]

On Wed, 6 Apr 2016, Sheldon Daitch wrote:

> The Extel printers were usually set up for roll paper.  The roll paper was a
> little bit thinner, and didn't last nearly as long as a box of fanfold, but
> seems to me that the Extels might not have been able to pull the fanfold
> paper through the printer.
> 
A lot of the Extel printers were ribbonless and used a special impact
sensitive paper from 3M that must have been expensive.  Other Extel
printers were fitted with ribbons and could use ordinary paper.  So
far as I know you can't get the impact sensitive paper anymore, so
Extel printers without the ribbon mechanism are dead.