Abstract: A drop generator for a printing head of a continuous inkjet printer includes at least one ink feed conduit for feeding ink into a stimulation chamber, which has a quality factor Q lower than 2 and at least one resonant frequency fr; an actuator for stimulating a wall of said stimulation chamber; and at least one nozzle for ejecting a jet.

Abstract: An arrangement in communication with a printer. The printer includes at least a print-head configured to deposit liquid ink on an area on a surface of a substrate. The liquid ink comprises a solvent portion and a dry content. The arrangement comprises at least one nozzle configured to generate a stream of gas over said area with a gas stream velocity and/or gas stream shape, such that an evaporation rate of the solvent portion of the liquid ink is increased and a rate of change of velocity of the gas stream propagation increases with a distance normal to a direction of a gas flow and is maximized over the surface of the substrate and the deposited ink.

Abstract: A damper for a continuous ink jet printer, comprising a fluid receiving chamber (6), comprising at least a lateral wall (22), a fluid inlet (11), and a fluid outlet (12), and at least one membrane (14), the membrane being in a material having a Young modulus between 0.5 MPa and 1000 MPa, the membrane being deformed under the influence of a pressure variation in the first portion.

Abstract: A cleaning process for cleaning at least one part of a hydraulic circuit of a continuous inkjet printer. The hydraulic circuit includes a solvent tank and an ink tank, and hydraulic connections for sending ink and/or solvent to a print head. The cleaning process includes: a preliminary step of flushing or cleaning at least part of the ink or hydraulic circuit; and flowing or circulating the gas, and solvent, through at least one part of the hydraulic circuit and recovering dirty fluid from the at least one part of the hydraulic circuit in a recovery cartridge or in a tank.

Abstract: The present invention mask helps contain the spread of viruses, bacteria, and other microbes that spread through human repertory ingestion while allowing users to utilize a cellular communication device in a private manner. The present invention employs an impervious privacy mask with an elongated mouth-piece having a semi-circular opening for a user's mouth and a second opening coupled with a transfer tube in which a user's voice travels until it reaches the receiver of a cellular communication device, cellular phone, intelligent personal assistant, or computer, inserted in a head-set equipped with ear-pieces. The present invention is a device allowing both speaking and listening with privacy since it prevents both the user's voice to spread in the surrounding environment and outside noises to disturb the communication. Additionally, it prevents microbes contained within the user's emitted breath when speaking to be spread to the outside environment and to contaminate ambient air.

Abstract: A drop generator for a printing head of a continuous inkjet printer includes at least one ink feed conduit for feeding ink into a stimulation chamber, which has a quality factor Q lower than 2 and at least one resonant frequency fr; an actuator for stimulating a wall of said stimulation chamber; and at least one nozzle for ejecting a jet.

Abstract: A print head of a binary continuous jet printer comprising: a plurality of nozzles for producing a plurality of ink jets in a cavity delimited by lateral walls, an upper wall and a lower wall, a sorting unit for separating drops or sections of one or more of the jets intended for printing from drops or sections that do not serve for printing, a slot, which passes through the lower wall, enabling the exit of ink drops intended for printing, a gutter for recovering drops or sections not intended for printing, a conduit for injecting gas into the cavity, and for making this gas circulate, in the cavity, to the plurality of nozzles for producing a plurality of ink jets in the cavity, then to the gutter.

Abstract: A damper for a continuous ink jet printer, comprising a fluid receiving chamber (6), comprising at least a lateral wall (22), a fluid inlet (11), and a fluid outlet (12), and at least one membrane (14), the membrane being in a material having a Young modulus between 0.5 MPa and 1000 MPa, the membrane being deformed under the influence of a pressure variation in the first portion.

Abstract: A print head of a continuous ink jet printer comprising: a cavity for the circulation of jets, at least one nozzle for producing at least one ink jet or solvent in the cavity, at least one electrode for sorting drops or segments of one or several of the jets intended for printing from drops or segments that are not used for printing, an outlet slot of the cavity, open onto the exterior of the cavity and allowing the exiting of the drops or segments of ink intended for printing, a 1st gutter for recovering drops or segments not intended for printing, a 2nd gutter for recovering drops or segments that are not deflected and not intended for printing, this 2nd gutter being mobile and comprising an input slot and at least one suction channel, a motor, to actuate the 2nd gutter for recovering in movement between a retracted position, in which it does not close off the outlet slot of the cavity, and a closed position, in which its input slot faces the outlet slot of the cavity; a seal between the print head and the

Abstract: The invention firstly relates to a print head of a continuous ink jet printer, comprising a first reservoir (12) and a second reservoir (22), arranged on either side of least one jet ejection nozzle (30, 301-30n) to which they are connected, and a first actuator (16, 161-16n) for applying a 1st pressure to the ink of the, or coming from the, 1st reservoir, and a second actuator (26, 261-26n) for applying a 2nd pressure to the ink of the, or coming from the, 2nd reservoir, and a controller for controlling these first and second actuators, said controller being programmed to apply a variable difference between these 2 pressures.

Abstract: A print head of a continuous ink jet printer comprising: a cavity for the circulation of jets, at least one nozzle for producing at least one ink jet or solvent in the cavity, at least one electrode for sorting drops or segments of one or several of the jets intended for printing from drops or segments that are not used for printing, an outlet slot of the cavity, open onto the exterior of the cavity and allowing the exiting of the drops or segments of ink intended for printing, a 1st gutter for recovering drops or segments not intended for printing, a 2nd gutter for recovering drops or segments that are not deflected and not intended for printing, this 2nd gutter being mobile and comprising an input slot and at least one suction channel, a motor, to actuate the 2nd gutter for recovering in movement between a retracted position, in which it does not close off the outlet slot of the cavity, and a closed position, in which its input slot faces the outlet slot of the cavity; a seal between the print head and the

Abstract: The invention relates to a circuit (100) for recovery of vaporized solvent in a cavity (5) in a print head of an inkjet printer, comprising: a double flow heat exchanger (30) comprising a first circuit between a first inlet (35) and a first outlet (36), for a gas flow from said cavity, this exchanger comprising a second circuit thermally coupled to the first circuit and located between a second inlet (37) and a second outlet (39), a condenser (8) with an inlet (35) with fluid coupling to the first outlet (36) from the exchanger, along the direction of circulation of the gas flow, and an outlet (86), with fluid coupling to the second inlet (37) of the double flow exchanger (30).

Abstract: The invention relates to a circuit (100) for recovery of vaporized solvent in a cavity (5) in a print head of an inkjet printer, comprising: a double flow heat exchanger (30) comprising a first circuit between a first inlet (35) and a first outlet (36), for a gas flow from said cavity, this exchanger comprising a second circuit thermally coupled to the first circuit and located between a second inlet (37) and a second outlet (39), a condenser (8) with an inlet (35) with fluid coupling to the first outlet (36) from the exchanger, along the direction of circulation of the gas flow, and an outlet (86), with fluid coupling to the second inlet (37) of the double flow exchanger (30).

Abstract: A print head of a binary continuous jet printer comprising: a plurality of nozzles for producing a plurality of ink jets in a cavity delimited by lateral walls, an upper wall and a lower wall, a sorting unit for separating drops or sections of one or more of the jets intended for printing from drops or sections that do not serve for printing, a slot, which passes through the lower wall, enabling the exit of ink drops intended for printing, a gutter for recovering drops or sections not intended for printing, a conduit for injecting gas into the cavity, and for making this gas circulate, in the cavity, to the plurality of nozzles for producing a plurality of ink jets in the cavity, then to the gutter.

Abstract: The invention relates to a print head of a binary continuous jet printer comprising: means for producing a plurality of ink jets in a cavity, delimited by lateral walls, and by an upper wall and a lower wall, means for separating drops or sections of one or more of said jets intended for printing from drops or sections that do not serve for printing, a slot, which passes through the lower wall, enabling the exit of ink drops intended for printing, a gutter for recovering drops or sections not intended for printing, means for injecting gas into the cavity, and for making this gas circulate, in the cavity, to the means for producing a plurality of ink jets in said cavity, then to the gutter.

Abstract: A liquid composition, including a solvent, for printing with a binary deflected continuous jet printing technique, wherein upon printing the liquid composition form drops that are each: not charged by an electric field, have a zero electric charge, form a dipole under the effect of an electric field, and are then deflected by the electric field. The liquid composition has all the following characteristics: a conductivity at 20° C. from 5 to 500 ?S/cm, still preferably a conductivity at 20° C. from 5 to 500 ?S/cm, the value of 500 ?S/cm being excluded, better a conductivity at 20° C. from 5 to 400 ?S/cm, still better a conductivity at 20° C. from 30 to 400 ?S/cm, for example from 30 to 200 ?S/cm; a dynamic viscosity at 20° C. from 1 to 25 cPs, preferably from 6 to 25 cPs; and a density from 0.8 to 2.5 g/cm3, preferably from 1.2 to 2.5 g/cm3.

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: The invention firstly relates to a print head of a continuous ink jet printer, comprising a first reservoir (12) and a second reservoir (22), arranged on either side of least one jet ejection nozzle (30, 301-30n) to which they are connected, and a first actuator (16, 161-16n) for applying a 1st pressure to the ink of the, or coming from the, 1st reservoir, and a second actuator (26, 261-26n) for applying a 2nd pressure to the ink of the, or coming from the, 2nd reservoir, and a controller for controlling these first and second actuators, said controller being programmed to apply a variable difference between these 2 pressures.

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 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).