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ELECTRIC FIELD ASSISTED INK JET SYSTEM

IP.com Disclosure Number: IPCOM000023711D
Original Publication Date: 1978-Dec-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 222K

Publishing Venue

Xerox Disclosure Journal

Abstract

One type of ink jet printing system utilizes a drop-on-demand process, That is, an ink droplet is expressed only on a predetermined signals Such signal might be, for example, an application of electrical field to a piezoelectric member, This system requires more accurate control of drop size and velocity than is required by ink jet printing systems based on a continuous process- The requirement for more stringent control is most evident in the case of "first drop syndrome", which appears as a larger first drop in a sequence of drops and its corresponding misplacement on the receiving member. By increasing drop velocity, misplacement can be reduced, One technique for increasing drop velocity is to provide an electric field between the jet nozzle and the receiving sur-face- The ink droplet is inductively charged by the field and is, as a result, accelerated toward the receiving surface minimizing drop misplacements

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XEROX DISCLOSURE JOURNAL

ELECTRIC FIELD ASSISTED INK JET Proposed Classification

______

                                    tJ~S~C1~ 346/1
Marcus M~ Schnarr Into Cl, GOld 9/00

One type of ink jet printing system utilizes a drop~on~demand
process, That is, an ink droplet is expressed only on a
predetermined signals Such signal might be, for example, an
application of electrical field to a piezoelectric member,
This system requires more accurate control of drop size and
velocity than is required by ink jet printing systems based on
a continuous process~ The requirement for more stringent
control is most evident in the case of "first drop syndrome",
which appears as a larger first drop in a sequence of drops and
its corresponding misplacement on the receiving member. By
increasing drop velocity, misplacement can be reduced, One
technique for increasing drop velocity is to provide an
electric field between the jet nozzle and the receiving sur~
face~ The ink droplet is inductively charged by the field and
is, as a result, accelerated toward the receiving surface
minimizing drop misplacements

Volume 3 Number 6 November/December 1978 421

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