On 10/13/2015 11:43 AM, Brent Hilpert wrote:
TMK these were generally referred to as electrographic printing.
This sort of scheme goes back to at least the 40/50s for fax
machines: http://www.cs.ubc.ca/~hilpert/e/deskfax/index.html There
the metalisation is on the back of the paper.
Similar technique used in an early 70s calculator, but the
metalisation is on the front:
http://www.cs.ubc.ca/~hilpert/eec/calcs/CanonEP151.html John Wolff
describes the mechanism in more detail:
http://www.johnwolff.id.au/calculators/Canon/SE600/SE600.htm
My first contact with this paper wasn't printing, but rather in biology.
You'd wrap the stuff around the drum of a kymograph, connect the
(insulated) stylus to a HV (battery-powered induction coil setup) power
source, and grounding the drum. Turn the power on and let 'er rip. I
suspect that this technology probably goes back to the 20's at least.
--Chuck
