Abstract: A method of fabricating bent laminated safety glass windshields having at least one hole through the entire thickness thereof adjacent to but spaced entirely from the marginal edge thereof is disclosed.

Abstract: A laminated glass windshield is manufactured by bonding glass plates having a thickness of 1.5 to 2.5 mm together wherein the peripheral portions of the outer surfaces of the glass plates are subjected to a plane compressive stress of 200 to 500 Kg/cm.sup.2.

Abstract: A method for bonding together a pair of members comprising positioning a layer of soldering glass between the pair of members, melting the glass, bonding the members into the molten glass and cooling the members. One of the members may be conductive with the soldering glass coated thereon, or the soldering glass may be coated on a conductive element which becomes bonded between the pair of members.

Abstract: A method for producing a panel for a back-lighted display sign comprises the steps of impressing recesses about one surface of a planar sheet of rigid foam to reduce the sheet thickness in a pattern corresponding to a desired pattern of recesses. Apertures are also formed through the sheet at locations each bounded by an identical corresponding portion of each recess. The sheet of foam is then sandwiched between outer cover layers to complete the basic panel structure for a display sign having multiple recesses containing discs which are moved between bi-stable positions covering the apertues or clear of the apertures.

Abstract: A plurality of inner and outer shell molds having virtually identical surface contours are formed from a single master mold such that glass outer layers sagged to the contour of said outer shell molds may be laminated with any glass inner layer sag-formed on said inner shell molds.

Abstract: A stretching frame and vacuum former having an identical geometric shape with the vacuum former being proportionally reduced in peripheral dimensions, permits a stretched molecularly-oriented, light-polarizing, organic film having a uniform direction of polarization to be bonded to a substrate without distorting the direction of polarization. The method is practiced by supporting the molecularly-oriented, light-polarizing, organic film in contact with the edge of the vacuum former with the vacuum former being located substantially equidistant from the stretching frame and then a vacuum is applied to the chamber of the vacuum former to draw the film down onto the optical element. By utilizing a stretching frame and vacuum former having identical geometry, the uniform direction of polarization is not distorted by uneven stretching of the organic film as it is drawn down into contact with the glass element by the reduced pressure.