Vandal resistant display units

Abstract

A display device includes a component in the form of a plate bearing one or more display indicia on one plate surface and having a passage extending through the plate adjacent the display indicium. An integral light-transmissive element is fixedly secured in the plate passage and has a first lensed surface at one end adjacent the display indicium. At its opposite end, the light-transmissive element defines both a second lensed surface and a flat surface in abutting relation to a stepped part of the passage within the plate. The first lensed surface is convex relative to the light-transmissive element and the second lensed surface is concave relative to the light-transmissive element. The element, comprised of a polycarbonate film which is highly resistant to impact damage, is of dimension relative to the passage such that an interference-fit exists therebetween. The element is accordingly not removable by action thereon at the display surface, is not destructed by impact and cannot be forced against an interior light source, thereby providing a quite high degree of resistance to vandalism.

Dependencies are inferred from the claim text.