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Cutting Laminated Glass Plate Structures

IP.com Disclosure Number: IPCOM000086072D
Original Publication Date: 1976-Jul-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 55K

Publishing Venue

IBM

Related People

Hartwig, U: AUTHOR [+2]

Abstract

Glass plate structures in laminated form, such as those used in gas panel technology, are generally cut by abrasive machining involving expensive diamond tools and lubricants.

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Cutting Laminated Glass Plate Structures

Glass plate structures in laminated form, such as those used in gas panel technology, are generally cut by abrasive machining involving expensive diamond tools and lubricants.

The well-known method of cutting glass, which takes advantage of the glass's notch sensitivity in a two-step process (first the glass is notched by scribing a line and then a tensile or shear stress is applied to it), cannot be used in this case, since with laminated structures there is no suitable cutting edge. Notching both substrates and then subjecting them to a breaking step requires rather sophisticated methods and means to achieve satisfactory results.

A very simple method of cutting laminated glass plate assemblies involves, according to the present proposal, also a two-step process, namely scribing lines opposed to each other on the upper and on the lower glass plates and heating them rapidly along the lines. Propane-oxygen burners are quite suitable for the present method.

As a precaution against transferring too much heat into the glass structure, which would lead to uncontrolled breaking in the case of faulty scribing, the heat transfer time should be limited to an interval that will be sufficient to permit cutting off the accurately scribed glass structure.

A suitable apparatus closely controlling the process parameters ensures the accuracy which is necessary for a proper sequencing of the processing steps. This apparatus contains a two-...