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Resonant Sound Absorbing Liner Ink Jet Heads

IP.com Disclosure Number: IPCOM000083281D
Original Publication Date: 1975-Apr-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Lane, R: AUTHOR [+2]

Abstract

Cavity resonances in an ink jet head affect the drop breakoff uniformity across an array of nozzles and is detrimental to drop placement accuracy. These cavity resonances are eliminated or at least substantially reduced by using an absorbing liner between the cavity and the print head.

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Resonant Sound Absorbing Liner Ink Jet Heads

Cavity resonances in an ink jet head affect the drop breakoff uniformity across an array of nozzles and is detrimental to drop placement accuracy. These cavity resonances are eliminated or at least substantially reduced by using an absorbing liner between the cavity and the print head.

An ink jet head 2 has an absorbing liner such as rubber mats 4, with air cavities 6 therebetween, spaced between the head structure 2 and the cavity wall
8. A nozzle array 10 is mounted on the face of the head 2, and a piezoelectric driver 12 is situated inside the cavity for producing perturbations in the ink.

The rubber mats 4 are selected to give an absorption on the order of 99% of sound energy in the 50-100 khz range appropriate to ink jet systems.

The piezoelectric driver 12 could be shock mounted directly to the rubber mat 4, for further reducing resonances of the piezoelectric driver itself.

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