Abstract: A device for forming and ejecting drops of an ink jet of a CIJ printing machine, this device including: a cavity for containing an ink and including an end provided with a nozzle (10) for ejecting ink drops, actuator means (21, 22, 32, 41, 42), in contact with the cavity, in which device the jet velocity modulation, from the nozzle (10), has a value ?Vj(ft) at the operating frequency of the cavity and the actuator, and this jet velocity modulation, at the temperature of 15° C. and at the temperature of 35° C., does not vary, in a frequency range of ±5 kHz about the operating frequency ft, outside the range of between 0.25 ?Vj(ft) and 4 ?Vj(ft).

Abstract: A removable single-block assembly for an ink circuit of a continuous inkjet printer, including a plate having a first fluid inlet, a second fluid inlet and a third fluid inlet and a first fluid outlet, a second fluid outlet, and a third fluid outlet, this assembly further including a first pump called a pressure pump, a second pump called a recovery pump, and a filter, fluid connection means to allow fluids to flow: between said first fluid inlet, the first pump, and said first fluid outlet, between said second fluid inlet, the filter, and said second fluid outlet, and between said third fluid inlet, said second pump, and said third fluid outlet, and means for mounting and dismounting the assembly on the ink circuit.

Abstract: A printing control method of a multi-nozzle binary continuous ink jet printer wherein drops of a first category and drops of a second category are formed by jet breaking. The flowpaths followed by the drops of the first and second categories are differentiated. For printing a black pixel followed by a white pixel, a drop of the first category and a drop of the second category are formed. The cumulative formation time drops of the first and second categories is equal to or higher than the running time of one pixel.

Abstract: In an apparatus for imprinting a material web including a transport arrangement for moving the material web through the apparatus along stations for applying coloring agents to the material web and fixing the coloring agent applied to the web, and a web buffer arranged in the web transport direction of the material web ahead of the first imprinting station for accommodating a section of the material web moved back out of the station area upon shutdown of the apparatus, at least one clamping structure (11a, 11b) is provided for fixing the material web (3) during the movement of the material web back out of the station area.

Abstract: An ink composition for inkjet printing by the continuous deflected jet technique, which is liquid at ambient temperature, comprising: a) a binder; b) one or more dyes and/or pigments; and c) a solvent, in which: said solvent comprises at least 10% by weight—relative to the total weight of the ink composition—of at least one noncyclic acetal, and at least 5% by weight of one or more other organic compounds capable of dissociating the ionizable species that are found in the ink.