Abstract: Travel of a printing head between ink-receiving and marking positions is guided along an arcuate path by a fluid power piston device having a cylinder pivotally mounted at its forward end on the frame of the printing apparatus. The longitudinal axis of the ink storing cartridge engaged by the printing head in the ink-receiving positions, is inclined downwardly and is tangent to the travel path at the adjacent terminal end thereof.

Abstract: In an ink metering device for an ink trough--ink roller combination, circular-cylindrical buttons rotatably inserted into the bottom plate of the ink trough are used as ink metering elements. One face end of the buttons has raised projections acting as metering ridges, which are either in contact with the ink roller 2 or spaced apart therefrom by a specific distance. The projections acting as metering ridges preferably extend diametrically across the face end of each metering element. By rotating the metering elements about their axis of rotation, which is approximately perpendicular to a tangent of the ink roller, the ink metering can thus be varied from a minimum amount (zero) to a maximum (for complete inking), depending on the rotational position of the raised projections.

Abstract: The invention relates to a printing mechanism, particularly for labelling devices, with an adjustable printing attachment, an inking rocker arm 20 and 108 which can be swung out and is swung out of its movement path on moving the printing attachment and a transfer roller 2, which inks the set type of the printing attachment said transfer roller 2 cooperating with a supply roller 4 arranged on a roller holder 6 and 106 freely rotatable about a spindle parallel to the transfer roller spindle 16. The roller holder 6 is pivotably mounted about the spindle 16 of transfer roller 2 and has laterally outwardly projecting projections 12, which engage on the guide rails 8 arranged on the sidewalls 18 of the casing.

Abstract: An ink supply device for use in a labeling machine: the ink supply device includes at least one inking roller; guide means on the frame of the labeling machine guide the inking roller to roll over the printing surface of a printing head; the guide means may comprise curved slots in or rails on the side plates of the machine frame; guide rollers that support the inking rollers are received in the guide means; in another embodiment, there are additional bearing plates attached at both ends of an inking roller; these plates are engageable with the lower end surfaces of the printing head; in other embodiments, two inking rollers are provided; each such roller is biased and guided in a different way; springs may bias both rollers toward the print surface, or only one roller; the roller may be guided to vertically shift over the print surface by a guide slot in the support carriage for the roller or by the slot of the guide means.