Patent ID: 7828490

Claim:
A printing apparatus, comprising: a main body having a first thermal head capable of printing on a first face of roll paper; a cover body having a second thermal head capable of printing on a second face opposite to the first face of the roll paper; a hinge mechanism which retains the cover body so that the cover body can rotationally move between a first state that it covers the main body and a second state that it is opened with respect to the main body; a first platen roller provided to the cover body so as to correspond to the first thermal head of the main body; a second platen roller provided to the main body so as to correspond to the second thermal head of the cover body; a first locating mechanism which locates the first platen roller of the cover body with respect to the first thermal head of the main body when the cover body makes the shift from the second state to the first state, and arranges the second thermal head of the cover body in the vicinity of the second platen roller of the main body; and a second locating mechanism which locates the second thermal head arranged in the vicinity of the second platen roller by the first locating mechanism with respect to the second platen roller of the main body, subsequently with the locating of the first locating mechanism, wherein the cover body comprises: a first frame which is fixed to the hinge mechanism and supports the second thermal head; a second frame which supports the first platen roller; and a connector which connects the first frame and the second frame so that the second frame can be rotationally moved with respect to the first frame.