Patent ID: 8297863

Claim:
A printing roll release mechanism for a printing roll provided in a thermal printer comprising: a holder ( 1 ) for holding said printing roll ( 6 ); said holder being provided with upper openings ( 2 ); each of said upper openings providing for an outline having an inside part comprising a first semi-circular cavity ( 7 ) provided with two terminal ends, a slanting part ( 8 ) extending from a first terminal end of said semi-circular cavity toward said upper opening ( 2 ) and a first vertical part ( 9 ) extending from said slanting part ( 8 ) and a second vertical part ( 10 ) extending from the other terminal end of said semi-circular cavity; a locking lever ( 13 ) including a second or another set of semi-circular cavities ( 16 ) provided with locking teeth ( 14 ) and freeing teeth ( 15 ) to cooperate with the printing roll ( 6 ) for locking and releasing the printing roll from said thermal printer, and the first-mentioned semi-circular cavities ( 7 ) cooperating with the second-mentioned semi-circular cavities ( 16 ), and said locking teeth ( 14 ) fastening the printing roll ( 6 ) in its working position; and a lifting projection part ( 19 ) coupled with said lever ( 13 ) for rotating said lever ( 13 ) around a pin ( 12 ) to free the printing roll ( 6 ) from said holder ( 1 ) so that the printing roll ( 6 ) can be lifted from its seat, and the freeing teeth ( 15 ) push the ferrules ( 3 ) and the printing roll ( 6 ) along the slanting parts ( 8 ) of the openings ( 2 ).