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US 4,905,018 AGranted
Ink jet printing head and industrial plotter which is equipped with it
AssigneeImaje S.A.
InventorLuc Regnault
Life of this patent
Estimating the term…
Abstract
Ink jet printing head and replacement of bevel sticks in industrial tracers by an ink jet printing head provided with a set of deflection plates (3, 4, 5) so arranged and polarized that the electric field of deflection of droplets is orientable according to an angle which may vary from 0.degree. to 180.degree.. The applications cover particularly the field of industrial tracing techniques.
Claims8
An ink jet printing head comprising:
- (a) an ink feed device;
- (b) a modulation system having an ejection nozzle operatively connected to said ink feed device;
- (c) a charging electrode downstream of said ejection nozzle in position to charge ink droplets ejected by said ejection nozzle;
- (d) a first deflection plate downstream of said charging electrode and adjacent the path of the ink droplets;
- (e) a second deflection plate downstream of said charging electrode by the same distance as said first deflection plate, adjacent the path of the ink droplets, and perpendicular to said first deflection plate;
- (f) a third deflection plate downstream of said charging electrode by the same distance as said first and second deflection plates, adjacent the path of the ink droplet, parallel to said first deflection plate, and perpendicular to said second deflection plate;
- and
- (g) electronic circuit means for controlling the voltages on said first, second, and third deflection plates so that the electric field generated by said first, second, and third deflection plates is oriented along an angle .beta. which may vary from 0.degree. to 180.degree..
5 more elements
Dependencies are inferred from the claim text.