Safety windowpanes made of laminated glass; processes for their manufacture
AssigneeVertal Nord Est
InventorsJean-Pierre Deprez, Christian de la Rochefoucauld
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Abstract
A safety windowpane and process of manufacture made of laminated glass. The windowpane includes two glasses made of annealed, hardened or quenched glass 1, 2 bonded to one another by an insert sheet of synthetic material 3 to the opposite faces of which the glasses are adhesively attached. The sheet includes in the material a line 4 of discontinuity in mechanical strength of relatively small width. The line defines an outline of preopening of a surface area such that after breaking of the glasses 1, 2 and rupture along the outline, it offers a sufficient passage for a human body.
Claims10
A laminated glass safety windowpane comprising two glass layers selected from annealed, hardened or quenched glass bonded to each other by an insert sheet of synthetic material selected from the group consisting of polyvinylbutyral and ultraviolet-polymerizable transparent acrylic resin to the opposite faces of which said glasses are adhesively attached over a complete surface thereof, in which said sheet comprises in said material a line of discontinuity in mechanical strength of relatively small width, said line defining an outline of an opening in the surface area of said insert sheet which is capable of rupturing and providing an emergency exit upon breakage of said glass layers of said window pane.
Dependencies are inferred from the claim text.