Browse Prior Art Database

Method of Plastic Press Sealing a Display Panel

IP.com Disclosure Number: IPCOM000085059D
Original Publication Date: 1976-Feb-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Chaikin, A: AUTHOR [+2]

Abstract

In sealing the glass plates in a gaseous display panel, one of the conventional techniques is to insert rods of seal glass between the two glass plates and apply pressure to the seal so that the sealed glass, when it reaches the critical oven temperature, will reflow to provide the desired chamber space and seal width.

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Method of Plastic Press Sealing a Display Panel

In sealing the glass plates in a gaseous display panel, one of the conventional techniques is to insert rods of seal glass between the two glass plates and apply pressure to the seal so that the sealed glass, when it reaches the critical oven temperature, will reflow to provide the desired chamber space and seal width.

Normally, such pressure is applied to the seal area by placing weights on the upper plate of the panel or by utilizing spring pressure. After this pressure is applied, the assembly is processed through the remainder of the oven cycle in which the seal pressure compresses the seal to the desired thickness under control of spacing members. The pressures thus applied can be quite high, amounting to as much as ten pounds.

Forces of this magnitude, when applied to thin, slender sealing rods can sometimes cause fracture or minute localized chipping of the rod. This is very undesirable from the standpoint of providing a continuous rim seal, and also from the standpoint of contamination resulting from particles produced by fracture or chipping being projected into the active area of the panel during the seal operation.

A method to effect sealing without fracturing the sealing rods causes the necessary sealing pressure to be applied only after the seal glass has softened or become "plastic". Referring to the drawing, a gas panel comprising glass substrates or plates 1 and 3 and peripheral sealing rods 5 and 7 is placed within a fixture comprising a...