Always Be Circulating

I occasionally like to stamp things (rubber stamps in ink on paper approximately the size of a dollar bill; I'll do a few dozen at a time). Does a device exist where I could feed lots of paper through and make a small ink stamp on each of them? I'm not at the point of something messy or a small letter press, but I'm wondering if there are examples of obscure contraptions or homemade devices that I could look into. Thank you, good people.