Ok, I don't know how much your budget is but I would do this... Use a Zebra wireless printer http://www.zebra.com/id/zebra/na/en/index/products/printers/mobil

Ok, I don't know how much your budget is but I would do this... Use a Zebra wireless printer http://www.zebra.com/id/zebra/na/en/index/products/printers/mobile/mz_220.html http://www.zebra.com/id/zebra/na/en/index/products/printers/... Combine it with a smart phone or an enterprise PDA (eg Motorola Enterprise Mobility - you can drop them, run over them, throw them and nothing will break). I work in delivering software solutions to factories etc and Motorola (was previously Symbol before they got bought out) is the defactor standard for wireless handheld devices. They are built to last but if you need many, may not be so cost effective. I guess a simple app on a smartphone may be able to do it.