Abstract: A method is provided for continuous production of gypsum boards which comprises forming a laminate of gypsum slurry between a facing paper and a backing paper and continuously forming a longitudinal recess along the side edges of the laminate surface, and a lateral recess at spaced intervals on the laminate surface thereby producing a four-tapered edge gypsum board which is uniquely suitable as a material of construction in the building industry.

Abstract: A method is provided for continuous production of gypsum boards which comprises forming a laminate of gypsum slurry between a facing paper and a backing paper and continuously forming a longitudinal recess along the side edges of the laminate surface, and a lateral recess at spaced intervals on the laminate surface thereby producing a four-tapered edge gypsum board which is uniquely suitable as a material of construction in the building industry.

Abstract: Construction and method of making a simulated decorative cracked glass laminate in tile, panel, sheet, plate or veneer form. The structural element comprises in bonded combination a glass mirror and a backing layer, preferably a water-felted mineral fiberboard panel. An accurately reproduced image of decorative cracked glass is applied to the mirror, either before or after the mirror is bonded to the backing layer to provide a simulated decorative cracked glass mirror appearance with the mirror being uncracked and intact and the bonded combination being shatter-, heat- and fire-resistant. Means are provided to produce such a simulated cracked glass appearance with uncracked glass.

Abstract: Construction and method of making a decorative cracked glass laminate in tile, panel, sheet, plate, veneer or in situ form. It comprises three layers laminated together, an inner backing layer, a substantially light-transparent outer layer, and a decoratively cracked glass intermediate layer sandwiched between the inner and outer layers. The intermediate layer, preferably a mirror, is made of tempered glass and the outer layer is made of annealed glass. The laminate is made by laminating the inner and outer layers to the intermediate layer while it is in uncracked condition, and then causing it to crack in situ as by cutting into an exposed edge. Alternatively, the two glass layers may be laminated together and then laid in a backing material such as plastics which then forms the backing layer of the two-glass laminate.

Abstract: A construction of an element adapted to provide fire-resistant support for a relatively fragile and relatively heavy decorative glass member, the construction converting that element into a structural element having in bonded combination a water-felted mineral fiberboard panel, a glass mirror, and a latex-, rubber-base or epoxy waterproof adhesive, the combination being edge-supported on a hung gridwork.