Cell has multiple functions comprising a chamber has a variable volume, and fluid supply circuit of a print head has a jet of ink which is relates

摘要

The invention relates to a cell including a variable-volume chamber and to a fluid-feed circuit of an ink-jet printing head which is equipped therewith. Such a cell is made up of the combination of a variable-volume chamber 1 connected to a pressure sensor 5 on the one hand and to at least one pair of valves 7, 9, each pair associated with a restriction 8, 10; the variation in volume being obtained by means of a piston actuated by an eccentric 3 integral with the rotor of a motor 4. Such a cell operates as a pump, allows the motor to be timed, determines the viscosity of a fluid, monitors the homogeneity of the fluid, etc. The invention particularly applies to ink-jet printing techniques. IMAGE