Xerox has reached an agreement with On Demand Books, the company behind the Espresso Book Machine, reports Publishers Weekly. You can check out the PW article for more on the tech specs, but this essentially means that On Demand will now have the considerable resources of Xerox at its disposal, in terms of a sales force and a trusted name in the business of copying things fast. Through this agreement, the Espresso Book Machine (which, you’ll recall, is an in-store device that spits out a speedy hard copy of a digital copy of a book in a few minutes).

Here’s more from PW: “By partnering with Xerox, On Demand will have access to a sales force for the first time and will make joint sales calls with Xerox, which will forward leads. ‘It’s been a long journey,’ said Xerox publishing v-p John Conley, formerly with R.R. Donnelley, who has been in discussions with On Demand for a number of months. For him, the driver behind Xerox’s decision is that there is now enough content, some 3.3 million titles, to make EBM work. ‘On Demand does many things we can’t do,’ he said, citing the EBM’s finisher and the EspressNet software. ‘But we have many, many skills that can make them more robust as you set a goal for worldwide capability. We think we can help make this incredibly significant. We like what it can do for the book distribution model.”

There are only 21 stores and libraries that currently have the machines, but through this agreement, you can bet you’ll see more of them–On Demand hopes to get 80 machines in the world by the end of 2011. Check out the video above to see how the Espresso Book Machine Works.