Dover Europe Sarl

Jean-Marie Rolland

Damien Bonneton

Niklaus Hugi

Camille Gobin

Jean-François Abadie

Gabriel Leopold

Nesrine Rebzani

Bénédicte Bertolami

David Darnaud

A method for forming at least one plurality of printed dots on a surface, with help of at least one plurality of drops generated by a printhead of a continuous inkjet printer. The method comprises, for each plurality of printed dots: deciding, whether all drops of the at least one plurality of drops are protected from perturbations due to the air resistance or whether at least one drop of the at least one plurality of drops is not protected from the perturbations; generating and charging each drop of the at least one plurality of drops according to whether it is protected from the perturbations or not protected from the perturbations; and printing the at least one plurality of drops on the surface.

Method for printing a plurality of drops at high speed

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 printed graphical code has H lines and a W columns i (i=1, . . . W) and a pattern of H&#xd7;W cells, each at the intersection of a column and a line. Each cell or dot is formed with a drop from a printhead of a continuous inkjet printer and two successive dots of a column are separated by at least one non printed cell. A method for printing each column comprises: retrieving or selecting charges to be applied to each drop for printing the dots of the column from a set of data or database of charges for each of a number of configurations of drops to be printed, the number being equal to or less than 2if H is an even number or equal to or less than 2if H is an odd number; charging the drops for printing according to the retrieved charges; and printing the column.

Method for optimizing a printing speed of a CIJ printer, in particular for printing 2D or graphical codes

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.

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Romans sur Isere, France

Jean-Marie Rolland