Wallboard with applied markings
An apparatus and method for applying reference or grid markings to wallboard during the manufacturing process is disclosed. Reference or grid markings are applied to one sheet of cover paper at a location between the originating cover paper rolls and the cover paper creaser or creasers. This is accomplished by locating and aligning multiple print heads across the width of the continuously passing cover paper, such that markings are ejected onto the cover paper in a specific and coordinated fashion. In addition to using any suitable commercially-available computer equipment to coordinate printer head activity, this function is accomplished by attaching each print head to a common horizontal support element and provide individual adjustments that are perpendicular to, and with the directional flow of the passing cover paper.
1 . A wallboard comprising:
a cover paper containing reference marks in predetermined locations;
a slurry core; and
a second cover paper devoid of reference marks.
2 . The wallboard of claim 1 , wherein the reference marks are located on each edge of the cover paper and 16 inches, 24 inches and 32 inches from either edge of said cover paper.
3 . The wallboard of claim 1 , wherein said predetermined marks are formed from indelible ink.