Consider E-Ink technology (linked). The display consists of an array of electrically alterable miniscopic cells, each of which retains its status after getting altered, and there are electronic circuits behind the visible surface of the display, to do the altering.

In this printer the paper consists of the array of alterable miniscopic cells. It passes through the printer, which suitably alters the cells as the paper passes through. The resulting image is as static as ever. But the paper can be used over and over again, because the entire image on the paper can be erased and otherwise altered, while passing through the printer.

Note that E-ink technology is only one of several possibilities for this system, and some of them can do colors well.
-- Vernon, Oct 27 2016

E-ink technology http://www.eink.com/technology.html
As mentioned in the main text. [Vernon, Oct 27 2016]

An alternative to E-ink https://www.technol...-the-e-paper-chase/
As mentioned in the main text. [Vernon, Oct 27 2016]

Printer companies' similar inventions https://www.google....sable+paper+printer
Prior art. They don't use epaper tech, though, so this is a new idea, I think. [notexactly, Oct 27 2016]

Barely vaguely related self promotion ... Solar_20Panel_20in_20a_20can
[normzone, Oct 27 2016]

[+] Autobun... I take it you've done due diligence.
-- FlyingToaster, Oct 27 2016



random, halfbakery