| 摘要 |
A method for applying an electric charge in ink jet printers of the so-called continuous kind, in which electrically conductive ink or like medium is forced in the form of a jet (3) from a container through a nozzle (1) or the like and is caused to form droplets (4), which are electrically charged and which are caused to pass deflecting electrodes (6) to which a voltage is applied and are caused to travel along a movement path dependent, inter alia, upon the electric charge, thereby to provide a pre-determined transcript or the like on a printing sheet (5) or corresponding material. The method according to the invention is particularly characterized in that disturbances of a given kind are generated in a known manner by means of a piezo-electric crystal (8) and are caused to act upon the jet (3) in a manner to cause the jet to disintegrate into droplets (4) in a pre-determined fashion, and in that the ink is electrically charged in the nozzle (1) by varying the voltage applied while taking into account the pre-determined frequency at which droplets are separated, whereby practically each droplet (4) is given an individual, pre-determined charge lying in relation with the level of voltage applied on conjunction with the separation of the droplets (4). The invention also relates to an arrangement for carrying out the method. |
