Other objects and advantages of a print head has a jet of ink in a franking machine for printing units in steps

摘要

The franking machine comprises an ink jet printing head (2) including a plurality of nozzles (b1 - b3, b128, b '1, b ′ 124 - b ′ 128) arranged in at least two rows (r1, r2) extending transversely to the direction of displacement (f) of the articles to be franked. A first end nozzles of a row of nozzles (r1) are arranged in a screw - to - screw of a few seconds end nozzles of the other row of nozzles (r2). The control means (3) provided for controlling the profile of the ejection of the droplets of ink of the plurality of nozzles is arranged in such a way as to control the printing of the first patterns in an arrangement in steps by the action of the first and second nozzles of a screw - to - the first patterns by the action of a nozzle of the second nozzles. By a visual examination of the first and second units, it identifies the nozzles of the first series of which it is necessary to prevent the operation in order to obtain the printing of lines to the longitudinal direction of movement which are regularly spaced from each other.