Any photocopied materiel that was copyrighted would be an obvious infringment and therefore illegal. The sort of illegal like downloading a song from the net.
However, Jeppesen provide a service called JeppView, which is a CD Rom bought by a company to use by printing off charts from the CD. Usually prinited as a small booklet per airport. This is legal and of course the compnay would have to also buy the update CD-Rom from Jeppesen when there are revisions. MASTER charts on board for ships library MUST be original. So therefore the airline saves on the wear and tear of the charts and can keep printing as many as they like. My company practices this. Personally, I would prefer original loose charts that I manage myself.