Browse Prior Art Database

Ink Jet Nozzle Structure

IP.com Disclosure Number: IPCOM000053127D
Original Publication Date: 1981-Sep-01
Included in the Prior Art Database: 2005-Feb-12
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Brandon, FY: AUTHOR [+3]

Abstract

The manufacture of ink jet nozzles, with regard to the materials employing part tolerances, sealing and especially with respect to repeatability of manufacture, has provided an elusive engineering challenge. The nozzle described below and shown in the drawing is comprised of glass tubing, with the exception of a screen filter, and does not require the use of any epoxy, seal glass, etc., for bonding the screen, adapter or nozzle.

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Ink Jet Nozzle Structure

The manufacture of ink jet nozzles, with regard to the materials employing part tolerances, sealing and especially with respect to repeatability of manufacture, has provided an elusive engineering challenge. The nozzle described below and shown in the drawing is comprised of glass tubing, with the exception of a screen filter, and does not require the use of any epoxy, seal glass, etc., for bonding the screen, adapter or nozzle.

Referring now to the drawing, cylindrical elements 1-5 may be constructed of GS300 glass tubing. The filter screen 6 is preferably composed of a stainless steel mesh screen having a diameter which fits interiorally of the sleeve or cylinder 4 and is captured at its peripheral extremities by the tubes or sleeves 3 and 5. Ink enters the inlet 6a of the nozzle 10 and exits through an aperture 1a in the orifice plate tube 1. The tolerances on the various tubes are held to a close value so that, for example, the outer diameters of tubes 3 and 5 correspond closely to the inner or internal diameter of the sleeve or tube 4.

The inner element or sleeve or cylinder 2 having a reduced diameter bore 2a therethrough, which mates with the orifice 1a of the orifice plate 1, has its ends polished to a 5-10-microinch finish. This part is then ultrasonically cleaned, and a thin film of hafnium is sputtered on its outside or external end. All of the parts are ultrasonically cleaned and positioned, as shown in the drawing, in a fixtu...