Dover Europe Sarl

Markem-imaje Corporation

Markem-image Holding

Markem-imaje Holding

Damien Bonneton

Olivier Savry

Florence Odin

Jean-François Abadie

Camille Gobin

Bruno Barbet

Niklaus Hugi

Jean Xing

Jean-Marie Rolland

Lukas Glutz

Nesrine Rebzani

Patrick Soto

Thierry Jacquier

A method is provided for cleaning a print head, wherein the print head includes a cavity for the circulation of jets and at least one first spraying nozzle for projecting at least one cleaning fluid towards at least one inner portion of the cavity. The method includes the step of projecting, using the first spraying nozzle, several pulses of cleaning fluid towards the inside of the cavity.

Method and device for maintaining a nozzle print head

A method of authenticating a consumable or detachable element of a continuous inkjet printer comprising: the controller of the printer generating a 1item of random information that is dispatched to an authentication circuit of the element; encrypting the 1item of information by the authentication circuit using a 1encryption algorithm and a 1secret key to form a 1item of encrypted random information; dispatching the 1item of information to the controller; encrypting the 1item of information by the controller using a 2encryption algorithm and a 2secret key to form a 2item of encrypted random information; comparing the 1item of encrypted random information with the 2encrypted item of random information to authenticate the consumable element; and if the consumable element is authenticated, dispatching at least one part of a 3key, termed the shared key, by the element to the printer.

System for advanced protection of consumable or detachable elements

A print head of a continuous ink jet printer comprising: a cavity for the circulation of jets, delimited laterally by a 1side wall and a 2side wall, both at least partially parallel to a direction of flow of the jets in the cavity, at least one nozzle for producing at least one ink jet 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, open onto the exterior of the cavity and allowing the exiting of the drops or segment of ink intended for printing, at least one gutter for recovering drops or segments not intended for printing, at least one spraying nozzle, arranged in the cavity, for projecting at least one cleaning fluid towards at least one inner portion of the cavity and a motor driving the at least one spraying nozzle in rotation about an axis (x), for example perpendicular to a direction of flow of the jets in the cavity; a supply circuit supplying at least the spraying nozzle with cleaning fluid.

A print head of an ink jet printer comprising: a cavity for the circulation of jets, delimited laterally by side walls, at least one nozzle for producing at least one ink jet in the cavity, at least one generator applying a charge to at least one ink jet, 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, a slot, open onto the exterior of the cavity, a 1gutter for recovering drops or segments not intended for printing, a 2gutter for recovering drops or segments that are not deflected and not intended for printing, this 2gutter comprising an input slot and at least one suction channel, an actuator in order to actuate the 2gutter, a 1detector to detect an electrical charge of drops recovered in the 2gutter for recovering when the latter is in a closed position and/or a detector to detect, without contact, the passing of charged drops when the 2gutter is in an open position.

Method and device for detecting the correct operation of the nozzles of a print head

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 1gutter for recovering drops or segments not intended for printing, a 2gutter for recovering drops or segments that are not deflected and not intended for printing, this 2gutter being mobile and comprising an input slot and at least one suction channel, a motor, to actuate the 2gutter 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 2gutter for recovering in the closed position of the latter.

Print head of an ink jet printer with 2 gutters for recovery, of which one is mobile

A print head of a continuous ink jet printer, including, in a cover: means for producing at least one ink jet; means for separating drops of jets intended for printing from those that do not serve for printing; a slot, enabling drops intended for printing to get out; a recovery gutter () for drops not intended for printing, the recovery gutter comprising an ink recovery volume (); at least one detection conductor (), arranged inside the head; means () for detecting a variation in impedance of at least one of the detection conductors when ink () is present in contact with the conductor or with a dielectric layer () in contact therewith.

Device for measuring overflow from a gutter of a print head of an ink jet printer

The invention relates to a method for detecting the presence of a jet from a multi-jet print head of an inkjet printer comprising a plurality of nozzles (), at least one 1and one 2nd deviation electrode () for each jet, in which: the inkjet is produced by one of the nozzles, at a frequency f, and is then charged by a voltage Vat a frequency f, fnot being an integer multiple or sub-multiple of f; a jet charge signal is detected, derived from sampling, at frequency f, of the voltage at frequency f, at least one spectral component of this signal being used to detect the presence of the jet.

Method and device for detecting the presence of jets

A method of authenticating a consumable or detachable element of a continuous inkjet printer, (CIJ), comprising: the controller of the printer generating and dispatching a 1item of random information to an authentication circuit of the element; encrypting the 1item of random information by the authentication circuit using a 1encryption algorithm and a 1secret key to form a 1item of encrypted random information; dispatching the 1item of encrypted random information to the controller; encrypting the 1item of random information by the controller using a 2encryption algorithm and a 2secret key to form a 2item of encrypted random information; and comparing the 1item of encrypted random information with the 2encrypted item of random information. If the consumable element is authenticated, a shared key part of a 3key is dispatched by the consumable or detachable element to the CIJ.

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.

Binary continuous ink jet printer

The invention relates to a new control method for controlling the printing of a binary continuous inkjet printer provided with a printhead () with a set of deflection electrodes () shared by all of the nozzles of the head, at least one pair of electrodes () supplied in phase opposition relative to each other, and actuators () to which pulses are sent to form a distance Lbr from the plane of the nozzles (), from the break of a jet discharged by a nozzle () in communication with a stimulation chamber () to which said actuator is mechanically coupled, drops not able to be electrically charged or jet segment subjected to the electrostatic influence of the deflection electrodes. According to the invention, the pulses are controlled so as to minimize the total electrical charge taken on by the ink jet segments inside a volume of influence of the electrodes.

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Hostun, France

Damien Bonneton