The phone on the left has the back open (to the paper cartridge) and the phone on the right is how it would look with the case closed.
There is a serrated blade at the bottom where the paper comes out that allows the user to easily rip off the paper in a nice neat line.
What the back of the case looks like both opened and closed.
The phone case is printing what is on the phone screen.
The back opens up to allow for paper replacement.
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Phone Case Printer

This is a phone case (compatible with any phone of today) that can print what is on the phone screen. It has a variety of uses from maps, lists, pictures, directions etc.

Jeff Feeman
Industrial and Human Factors Design Lancaster, PA