[DonRotolo]

One such machine supplier is "badge-a-minit" (google it). They may not be the least expensive though, I have not done any research. Don't only consider the machine price, but the supplies price as well because you'll be using a LOT of that stuff.

Basically, we print the button on a color laser printer (several per page), cut out the circle using a circle cutter, then load into the button press: A clear cover, the paper (face down), a badge front, and a badge backer. Whack the press, and out pops a badge.

Our press spins 180 degrees, so while person A is loading one press hole, person B is whacking the press. Spin & repeat. Our is NOT a badge a minit product, their supplies were too costly.