Abstract: A recording substrate (21) is brought into a predetermined position on a recording substrate holder (10). One edge of the recording substrate (21) rests against a recording substrate stop (18) provided at one side on the recording substrate holder (10). Extending transversely to the recording substrate stop (18), in or on the recording substrate holder (10), there is a transmitting or receiving means (KS) which can be covered by the recording substrate (21). A receiving or transmitting means (KE) is provided on the printing head (7). In the region of the extent of the transmitting or recording means (KS), at a defined distance from the recording substrate stop (18), a shielding surface (30) is arranged on the recording substrate holder (10). During the movement of the printing head (7) along the transmitting or receiving means (KS), the location of the shielding surface (30) and the location of the recording substrate edge remote from the recording substrate stop (18) are detected.

Abstract: In a printing device having an abutment (10) intended for supporting a recording medium (52), a print head (32) which is movable relative to the abutment (10) in the direction of the lines, an actuating drive (28, 26, 24) for setting the print head distance relative to the abutment (10) and a pressing element (36) which extends the full width of the recording medium and presses the recording medium (52) onto the abutment (10) and can be deflected in accordance with the thickness of the recording medium (52), a magnet (54) is arranged on one of the parts (pressing element 36, part 46 fixed to the print head) and at least one Hall probe (56) is arranged on the respective other part (part 46 fixed to the print head, pressing element 36) in such a way that the magnet (54) and the Hall probe (56) can be brought into congruence with one another in a predetermined print head position corresponding to a measurement position, a circuit arrangement (60) being provided to measure the Hall voltage and to regulate the lat