Patent ID: 6666604
Filing Date: 2003-12-23
Classification: B41J

Abstract:
Thermal printing device comprising a frame, a thermal printhead flexibly mounted on the frame, a driving roller carried by a cover and integral with a gear assembly, the printhead resting on the roller when the device is in a printing position, and two orifices arranged in each lateral side of the frame, in which ends of a rotation axis of the roller can be inserted, wherein each orifice has a profile comprising a shoulder forming a position of unstable equilibrium of the axis of the roller during movement of said axis in said orifices, and said shoulder of unstable equilibrium is arranged between two positions of stable equilibrium of the axis and the roller, at an entry of a top part of the orifices and at a bottom of the orifices in a closed, locked position of the roller, respectively, wherein the cover (i) comprises one or a plurality of articulated elements, (ii) supports the roller so that the roller is movable with respect to the cover along a longitudinal axis perpendicular to the rotation axis of the roller, (iii) enables moving the roller to the entry of the top part of the orifices, and (iv) permits free displacement of the roller inside said orifices.