>I forgot how I loaded it into the machine, but perhaps it was easier then putting a usb stick in a computer.

My library had two forms of microfiche.

One was a cartridge containing a single spool, which upon being inserted into the reader would unspool onto an internal mechanism. You used two jog wheels, one fine and one coarse, to control the speed at which you traversed the tape, and there were numeric inputs so you could go to an arbitrary page. (it got close enough)

The second were flat rectangular sheets with pages laid out in a grid, and you placed the flat sheet onto a glass bed, pulled down a cover and slid the plate into the reader, using etch-a-sketch-like controls to move along the x and y axis.

In either case you could insert a dime and a single page of whatever was on the screen would spit out from an attached printer.