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TUBULAR INK JET ARRAY CAVITY

IP.com Disclosure Number: IPCOM000025136D
Original Publication Date: 1983-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 79K

Publishing Venue

Xerox Disclosure Journal

Abstract

Resonance within an ink jet cavity can serve to minimize the driving amplitude of the pressure transducer. Modes of resonance can, however, lead to undamped reflections within the cavity which result in interference phenomena. These interference effects lead to an unwanted spatial variation in the disturbance amplitude at the jet nozzles and substantial variations in breakoff length between adjacent jets.

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Page 1 of 2

(EROX DISCLOSURE JOURNAL

TUBULAR INK JET ARRAY CAVITY Joel M. Pollack
John M. Schneider

F/G. 2

Volume 8 Number 5 September/October 1983

Proposed Classification
U.S: C1. 346/75 Int. Cl. Gold 15/18

413

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

Page 2 of 2

TUBULAR INK JET ARRAY CAVITY (Cont'd)

Resonance within an ink jet cavity can serve to minimize the driving amplitude of the pressure transducer. Modes of resonance can, however, lead to undamped reflections within the cavity which result in interference phenomena. These interference effects lead to an unwanted spatial variation in the disturbance amplitude at the jet nozzles and substantial variations in breakoff length between adjacent jets.

The device 10 in Figure 1 eliminates these interference effects for larqe arrays of nozzles 12. The radial modes can be suppressed in a cavity 14 when the radius is confined to less than 3?/* . In prior art devices, large arrays with either cylindrical or rectilinear cavities suffer from a fundamental constraint upon the overall length because of longitudinal reflections.

In a cylindrical cavity 14 as shown in Figure 1 having a radius r equal to7"/4 and having nozzles 12 either mounted in the wall of the cylinder or welded thereon as a nozzle plate 16 to an opening 18 in the cavity 14 as shown in Figure 2, the radial component of resonance alone can be used to drive the jet breakoff and still minimize the necessary driving amplitude of the pressure transducer 22...