Ok, so if I have one vending machine with new cartridges and used cartridges (pretty much ANY vending machine could do this), one vending machine that refills/tests cartridges (this might be new and novel, don't know), and one vending machine that recycles old cartridges, and I duct-tape them all together, would I be in violation of this patent? It's not really clear to me what HP is trying to patent. I would think a machine that automatically refills and tests cartridges would be pretty cool. I think slapping that machine into another machine that also sells new and used cartridges is in no way actually inventing anything, and I wouldn't think that warrants a patent.
This would have been like Eli Whitney inventing the cotton gin, but in his patent application, he throws in things like: "This invention will contain one device that separates cotton from the seed, then it will contain one storage bin for the discarded seeds, and one storage bin for the cotton, and it will have a set of wheels as to be mobile." When in reality, the only thing people care about is the gin itself.