15 Jul
2011
15 Jul
'11
1:43 p.m.
Nasty thing that printer - It had a sharp serrated tear off bar and =
loads of
people got cut by it. If I remember rightly it had a helically wound =
wire on
a cylinder running against a bar on the other side of the paper. It was =
said
it worked in the same way as the WWII German Hellschreiber fax system.
IT's certianly similar in concept to Hell. It's an electrolytic process,
and one of the electrodes is replacable (you get a new one with each roll
of paper). I am not sure if it's metla deposited on the paper or a
chemical change in something that the paper is soaked in that causes the
image to appear.
The spinning helix (one of the electrodes) and the moving paper
effectively give you a scanning spot ove the paper and my applying a
high-ish voltage (I think around 70-V) betwen the elctrodes you get a dot
at that point. Or at least that's what's supposed to happen. Mine gous
throug hte motions and feds out the paper, but it's totally blank. The HV
ispresent, I'e tried another paper roll, etc. And yes, I did mosten the
pad inside the printer.
-tony