Grooved continuous casting mold for slabs

Claim 1

IN A WATER-COOLED CONTINUOUS CASTING MOLD, OPEN ON TOP AND BOTTOM, FOR USE IN THE CONTINUOUS CASTING OF SLABS, AN INNER MOLD WALL COMPRISING TWO END SECTIONS AND TWO WIDE CONNECTING SECTIONS, SAID WIDE CONNECTING SECTIONS HAVING A GREATER WIDTH IN THE HORIZONTAL DIRECTION THAN SAID END SECTIONS, AND EACH WIDE CONNECTING SECTION HAVING AN INTERNAL SURFACE ADAPTED TO BE IN CONTACT WITH A WIDE SURFACE OF A SLAB BEING CAST, A SERIES OF UPRIGHT GROOVES RECESSED IN THE INTERNAL SURFACE OF EACH WIDE CONNECTING SECTION, EACH UPRIGHT GROOVE COMPRISING TWO INTERSECTING UPRIGHT FACES ONE OF SAID FACES FORMING A SMALLER ANGLE OF INCLINATION WITH SAID INTERNAL SURFACE THAN THE OTHER FACE SAID ONE FACE BEING COORDINATED WITH THE UPRIGHT CENTRAL AXIS OF SAID WIDE CONNECTING SECTION, SAID OTHER FACE BEING COORDINATE WITH ITS RESPECTIVE END SECTION, SAID GROOVES CONVERGING DOWNWARDLY WITH RESPECT TO SAID CENTRAL AXIS AT A PREDETERMINED TAPER, SAID TAPER BEING ADAPTED TO BE IN ACCORDANCE WITH THE SHRINKAGE DOWNWARD CONTRACTION OF SAID SLAB.