| 摘要 |
The invention relates to a hydraulic actuator for a circuit for feeding a liquid-spraying module made of a fluid section (TF) and a dry section (TS) separated by a leaktight and elastic membrane (62). The fluid section (TF) includes a main body (42) for filtering all the fluid entering the said section, connected to a secondary filtering body (44) with tangential circulation of the quantity of fluid necessary for printing, itself connected to a plenum (calming) chamber (490) produced in a bored cylinder (48) hollowed out at the centre of the fluid section (TF) and in which the fluid not used for printing ends up, and which fluid is ejected towards the tank by a hydroejector (46). The dry section (TS) is made up by a cap (58) in which there slides a stop (61) under the action of a screw (60) moved by an automatically-controlled stepper motor (63) mounted so that it floats on the dry section. The invention applies to continuous ink jet printers. <IMAGE>
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