Importance

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Abstract

As an elongated laminate of paper faced gypsum being produced into drywall boards is advanced along a conveyor to a point at which the gypsum is dried to a water content such that the laminate can be embossed by an embossing roller which can be pressed into the laminate for a sufficient time and depth to form a embossed channel which is about the lateral width of a piece of drywall tape which would be used to tape the ends of two separate abutting drywall pieces when being hung and taped, and a depth sufficient to accommodate a strip of drywall tape within said embossed channel. The embossing step is done on the underside of said advancing laminate at a distance from a shear used for shearing the laminate into pieces of drywall, that the center line of the embossed channel bottom wall formed by said embossing roller is located the distance the advancing laminate has to travel to shear the individual drywall pieces being produced to a desired length, or a multiple thereof.

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First Claim