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Browse Prior Art Database

Ink Jet Head

IP.com Disclosure Number: IPCOM000080940D
Original Publication Date: 1974-Mar-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Koshinski, AA: AUTHOR [+2]

Abstract

An ink jet head having a wide frequency vibrational response for producing high-velocity drops, can be constructed with removable horn elements and still achieve a compact structure.

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Ink Jet Head

An ink jet head having a wide frequency vibrational response for producing high-velocity drops, can be constructed with removable horn elements and still achieve a compact structure.

In Figs. 1 and 2, head 1 is formed with a cavity 2, counterbore 3 and slot 4. The slot extends across the width of the head, and holds a pair of opposing blocks 5 having shaped surfaces 6 shown in Fig. 3. Blocks 5 are covered by rectangular member 7 adhesively secured in the slot 4. Surfaces 6 may be linear, exponential or parabolic in shape and form an acoustic horn leading from cavity 2. A drilled hole 8, counterbored to accept a nozzle 9, communicates with the horn. A supply opening 10 is formed opposite the nozzle opening 8 and connects to ink supply duct 11 secured to the head 1. The diameter of opening 10 is kept small to provide a high resistance to pressure excitation within the cavity.

A metal disk 12 is soldered in counterbore 3 and has a piezoelectric disk 13 adhesively secured thereto. The two disks may be sealed with silicone rubber. Upon electrically pulsing the piezoelectric disk 13, the metal disk 12 buckles and efficiently produces pressure perturbations in the relatively small volume. These perturbations are amplified along converging horn surfaces 6 toward nozzle 9.

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