Printing Images on a coffee mug

Does anyone know what piece of equipment is required to print a picture onto a coffee mug? Like they do in those stands at the mall? Searching the Internet finds me lots of places that will print a picture on a mug for me, but none that talks about what you need to do it yourself.

Thanks.

Try here:
http://www.transferit.net/files/pages/heatpress.htm

Or here:
http://www.geoknight.com/dk3.html

Or here:
http://www.stores.ebay.com/clcdigital