Thermal tape printing apparatus for a corded or cordless hand-held payment terminal

摘要

The unit has a robust structure for holding the paper roll with a hinged cover surrounding space for the paper roll providing supply to the thermal printing head. The portable payment terminal includes a keypad (4,5) with a hinged cover (100) and a thermal printing head printing on a band of rolled paper. The paper passes in front a thermal printing head (TPH) by a drive roller (ROL), and is cut into sections to form receipts. The device includes a fixed chassis (FIX) carrying the print head (TPH), and a movable cover (CO) giving access to a paper compartment. This is hinged about an axis (X2) which is parallel to the axis (X1) of the paper driver roller. The fixed part of the chassis (FIX) includes two lateral plates standing parallel, and perpendicular to the cover hinge axis, and joined by an inwardly curved cylindrical wall. The cover includes two discs which are intended to be seated between the two lateral plates, and a cylindrical envelope section which defines the paper compartment.