Browse Prior Art Database

Planar Monolithic Electrostatic Nozzle Spot Ink Printer

IP.com Disclosure Number: IPCOM000086957D
Original Publication Date: 1976-Nov-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Kuhn, L: AUTHOR [+3]

Abstract

The application of an asymmetric electric field to the continuous portion of a conducting jet of fluid gives rise to deflection of the jet.

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Planar Monolithic Electrostatic Nozzle Spot Ink Printer

The application of an asymmetric electric field to the continuous portion of a conducting jet of fluid gives rise to deflection of the jet.

For nozzle/spot systems, printing is accomplished with undeflected drops and, accordingly, the deflected drops are guttered. In the figure, a nozzle plate is shown wherein the deflection electrodes for an ink jet array are fabricated on the nozzle plate along with the deflection drive circuits.

A nozzle plate 2 is formed of a semiconductor material, such as silicon, and has a plurality of nozzles 4, 6 and 8 etched therein using standard etching techniques. The nozzles are shown as rectangular in cross-section, but in practice may have different geometries than shown, for example, triangular and hexagonal.

Deflection electrodes 10, 12 and 14 are spaced from the electrodes 4, 6 and 8, respectively, for responding to an excitation voltage for perturbing the respective streams and causing deflection thereof. The electrodes should be asymmetric with respect to the nozzles.

The deflection electrode 10 is connected to the secondary winding 16 of a planar transformer 18 having a primary winding 20 and a core 22 comprised of a high Mu film. Similar planar transformers (not shown) are connected to the electrodes 12 and 14.

Drive circuit 24 is connected to the planar transformers as well as to a control circuit 25 and a source of AC excitation 28.

The voltage VS from source 2B is: ...