Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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AGC Glass Europe SA
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Glaverbel Belgium SA
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Application filed by Glaverbel Belgium SAfiledCriticalGlaverbel Belgium SA
Priority to ES1972178145UpriorityCriticalpatent/ES178145Y/en
Publication of ES178145UpublicationCriticalpatent/ES178145U/en
Application grantedgrantedCritical
Publication of ES178145YpublicationCriticalpatent/ES178145Y/en
Investigating Strength Of Materials By Application Of Mechanical Stress
(AREA)
Abstract
Glass sheet, produced by a stretching process, characterized in that the distribution of glass veins of different refractive indexes in a cross section that extends over the entire width of the stretched tape and that is perpendicular to the drawing line, is discernable in any cross-section as a model of major contour lines, substantially parallel and visually forming or suggesting a pattern of planar ellipses within one another, and because such a distribution is such that there is no abrupt substantial change in the refractive index from one vein of glass to the other so as to produce a marked interruption in the continuity of the parallel interference strips, when the sheet is examined by means of an interferential microrefractometer that uses a ray of light, projected through the laminated glass in parallel to their main faces. (Machine-translation by Google Translate, not legally binding)