Employed in a casing applicator (13) for stuffing of meat products which is mounted on a stuffing tube (3) through which the meat mass is displaced coming from a stuffing machine (4) toward a clipping device (5), a supporting tube (2) through which a casing (1) travels, it consists of a pair of unshirring wheels (8) which pull the previously shined casing (1) on the supporting tube (2) taking it to the end of the supporting tube (2), being complemented with a ring (9) on the external surface of which the casing slides, incorporating a robot (12) which controls the speed and working of the servo-motors associated with the unshirring wheels and actuates the pneumatic cylinders for positioning the wheels on the casing.