Dry gloss pre-cast clay laminated paper and method of making it

Claim 1

A METHOD OF PRODUCING PAPER AND PAPERBOARD HAVING A CAST MINERAL SURFACE, WHICH COMPRISES THE STEPS OF APPLYING A THIN, SUBSTANTIALLY UNIFORM LAYER OF MINERAL COATING COMPOSITION DIRECTLY ON A CONTINUOUSLY MOVING CASTING SURFACE, SAID MINERAL COMPOSITION COMPRISING A WATER BORNE SLURRY COMPOSED ESSENTIALLY OF A MAJOR PROPORTION OF MINERAL PIGMENT AND A MINOR PROPORTION OF BINDER, DRYING SAID MINERAL LAYER IN CONTACT WITH SAID CASTING SURFACE WITH THE SURFACE OF SAID MINERAL LAYER AWAY FROM SAID CASTING SURFACE EXPOSED SO AS TO RAPIDLY REMOVE SUBSTANTIALLY ALL OF THE MOISTURE THEREFROM, THEREBY PROVIDING A SUBSTANTIALLY DRY FRANGIBLE MINERAL LAYER, ADVANCING A WEB OF PAPER FOR CONTACT WITH THE SAID MINERAL LAYER, AND, AS SAID PAPER WEB IS ADVANCED, APPLYING TO ONE SURFACE THEREOF A CONTINUOUS FILM OF BONDING ADHESIVE, BRINGING THE ADHESIVE SURFACE OF SAID WEB INTO PRESSURE CONTACT WITH THE DRY MINERAL LAYER SO AS TO EFFECT AN INTIMATE BOND THEREBETWEEN, THE SAID BONDIND ADHESIVE, AT THE TIME OF ITS CONTACT WITH SAID MINERAL LAYER, BEING SUFFICIENTLY FREE FROM MOISTURE AND OTHER SOLVENTS CAPABLE OF STRIKING THROUGH THE MINERAL LAYER TO ITS CAST SURFACE, SO THAT SAID CAST SURFACE WILL REMAIN ESSENTIALLY DRY, AND THEREAFTER STRIPPING SAID MINERAL LAYER FROM SAID CASTING SURFACE BY MEANS OF SAID WEB, SAID MINERAL LAYER BEING FIRMLY BONDED TO SAID WEB BY SAID BONDING ADHESIVE TO PROVIDE AN UNINTERRUPTED MINERAL COATING SUPPORTED ON THE SURFACE OF SAID WEB AND HAVING ITS EXPOSED FACE DISPLAYING THE CAST FINISH IMPARTED TO IT BY THE SAID CASTING SURFACE.