Axial droplet aspirator

Details Axial droplet aspirator Axial droplet aspirator

G - Physics

01

D

299/15, 101/96.0

G01D 15/16 (2006.01) B41J 2/02 (2006.01)

Patent

CA 1070749

AXIAL DROPLET ASPIRATOR ABSTRACT OF THE DISCLOSURE There is described a droplet aspirator for an ink jet printer. The aspirator includes a housing having a tunnel therein, which is spaced from an ink jet nozzle which emits an ink jet stream which passes through the tunnel. A gas stream is also directed through the tunnel at substantially the same velocity as the ink jet stream for reducing the aerodynamic effects on adjacent ink droplets. The tunnels cross-sectional area is substantially constant from one plane to the next when measured in any given plane transverse to the longitudinal axis, for maintaining the velocity of the gas stream constant. The tunnel has a circular cross- section when used in a nozzle per spot system, and when used in an analog deflected system, has an entrance of one geometry, with the tunnel changing in geometry along its longitudinal axis to a different geometry at its exit. Preferably, in the analog deflected system, the entrance geometry is circular and the exit geometry is elliptical or rectangular.

293420

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