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US 3,930,452 AGranted
Impact resistant panels
AssigneeGlaverbel-Mecaniver
InventorsRobert Van Laethem, Pol Baudin, Marcel De Boel
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AssigneeGlaverbel-Mecaniver
InventorsRobert Van Laethem, Pol Baudin, Marcel De Boel
Estimating the term…
An impact resistant panel composed of a group of at least three sheets of vitreous material bonded together via intervening layers of plastic material. According to one form of construction, the group includes a set of consecutive vitreous sheets of at least three different thicknesses which are arranged in order of thickness, and at least the first sheet, taken in the direction from the highest sheet thickness end of the set, is tempered. According to a second form of construction, the group includes a set of consecutive sheets of at least two different thicknesses arranged in order of thickness and at least two of the plastic layers are of different thicknesses and are arranged so that one of the layers having the smallest thickness is nearer the first sheet, taken in the direction from the thickest sheet, than is any other layer.
In an impact resistant panel composed of a group of at least three sheets of vitreous material bonded together via intervening layers of plastic material, the improvement wherein said group of vitreous sheets comprises a set of consecutive vitreous sheets of at least three different thicknesses which are arranged in order of thickness, and at least the first sheet of said set, taken in the direction from the highest sheet thickness end of said set, is tempered, and at least two of said intervening layers of plastic material are of respectively different thicknesses and are arranged so that the thinner of said layers is nearer to said first sheet than is any other one of said layers.
Dependencies are inferred from the claim text.