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Browse Prior Art Database

Seal Glass for Ink Jet Nozzles

IP.com Disclosure Number: IPCOM000088450D
Original Publication Date: 1977-Jun-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 23K

Publishing Venue

IBM

Related People

Humenik, JN: AUTHOR

Abstract

One of the current ink jet printing mechanisms, capable of high speed printing, is comprised of a single, glass nozzle. Described herein is a glass for sealing the glass nozzle to the holder in the nozzle assembly.

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Seal Glass for Ink Jet Nozzles

One of the current ink jet printing mechanisms, capable of high speed printing, is comprised of a single, glass nozzle. Described herein is a glass for sealing the glass nozzle to the holder in the nozzle assembly.

The figure is a schematic representation of the nozzle assembly. This assembly consists of a glass nozzle which is sealed to an alumina holder. The glass used to effect this seal must possess several properties. First, its thermal expansion must be such that it is compatible with the nozzle glass (Alpha = 64) and the alumina (Alpha = 70). Without this compatibility, the seal would crack. Second, the seal glass must flow at a temperature below the anneal temperature of the nozzle glass to prevent deformation of the nozzle during fabrication.

The glass which can satisfy both of the above criteria is described below.

The composition and thermal properties of this seal glass are given below: Conposition (w/o) Thermal Properties 37.8 PbO Alpha(20-300 Degrees C ; = 56.7 x10/-7// Degrees C 17.0 B(2)0(3) 8.6 SiO(2) TsT (strain) = 400 Degrees C 1.6 Al(2)0(3) Ta(anneal) = 427 Degrees C
28.7 ZnO Ts(softening) = 523 Degrees C 6.2 CuO 0.6 Bi(2)0(3).

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