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Browse Prior Art Database

MULTI-FLUID ELECTROSTATIC INK EMITTER

IP.com Disclosure Number: IPCOM000023166D
Original Publication Date: 1976-Dec-31
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 220K

Publishing Venue

Xerox Disclosure Journal

Abstract

The figure shows a high-frequency fluid transducer in use in non-impact printing technology. The device consists of a chamber 1 containing two immiscible fluids 2 and 3, an electrode 4 for charging fluid 2 and an orifice 5, The dielectric strength of fluid 2 should be less than that of fluid 3. Fluid 2 serves as the driving member similar in function to that of a piezoelectric crystal. Upon applica- tion of a voltage synchronous with that of a picture signal, fluid 2 will be displaced toward electrode 4 intermittently in accordance with the signal. The displacement forms a pressure variance in fluid 3 which results in the emission of droplets from orifice 5. If fluid 3 is ink, the device can be used to generate a dot pattern on paper.

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XEROX DISCLOSURE JOURNAL

MULTI-FLUID ELECTROSTATIC Proposed Classification
INK EMITTER U.S. Cl. 346/75
Marcus M. Schnarr Int. Cl, GOld 15/18

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The figure shows a high-frequency fluid transducer in use
in non-impact printing technology. The device consists of
a chamber 1 containing two immiscible fluids 2 and 3, an
electrode 4 for charging fluid 2 and an orifice 5, The
dielectric strength of fluid 2 should be less than that of
fluid 3. Fluid 2 serves as the driving member similar in
function to that of a piezoelectric crystal. Upon applica-
tion of a voltage synchronous with that of a picture signal,
fluid 2 will be displaced toward electrode 4 intermittently
in accordance with the signal. The displacement forms a
pressure variance in fluid 3 which results in the emission
of droplets from orifice 5. If fluid 3 is ink, the device
can be used to generate a dot pattern on paper.

Droplet size and frequency can be controlled by the ampli-
tude and duration of the voltage pulse, making this technique
accessible for achieving gray scale as well as high resolu-
tion. The advantage of the fluid driver lies in its
capability to impart large pressures in a relatively short
time due to its fast response and large fluid displacement.

Volume 1 Numbers 11/12 November/December 1976 57

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58 XEROX DISCLOSURE JOURNAL

V~7o1ume 1 Numbers 11/12 November/December 1976

[This page contains 1 picture or other non-text object]