Continuous heat treating apparatus for metal strips

Claim 1

A CONTINUOUS HEAT TREATING APPARATUS FOR METAL STRIPS COMPRISING: A FIRST SET OF ROLLS; A SECOND SET OF ROLLS SPACED APART FROM SAID FIRST SET, GUIDE ROLL MEANS BETWEEN EACH SET, EACH OF SAID FIRST AND SECOND SETS INCLUDING A CURRENT CARRYING ROLL WITH A CONDUCTIVE STRIP-ENGAGING SURFACE, A RESILIENT CONCAVE PRESSURE SHOE OF A SIZE CORRESPONDING ABOUT TO THE SIZE OF CURRENT CARRYING ROLL, MEANS TO APPLY AN A.C. CURRENT ACROSS SAID STRIP-ENGAGING SURFACE SO AS TO PASS A HEATING CURRENT THROUGH SAID METAL STRIP, MEANS TO DRIVE SAID CURRENT CARRYING ROLLS, MEANS TO URGE SAID SHOES AGAINST SAID CURRENT CARRYING ROLLS TO CAUSE EXTENDED SURFACE CONTACT OVER A LARGE ARC THEREBETWEEN, AND A COOLING LIQUID TANK TO IMMERSE SAID CURRENT CARRYING ROLL AND SAID SHOE, MEANS TO MOVE A METAL STRIP TO BE HEAT TREATED BETWEEN THE SHOE AND THE CURRENT CARRYING ROLL OF SAID FIRST SET, AROUND SAID GUIDE ROLL MEANS, AND BETWEEN THE SHOE AND CURRENT CARRYING ROLL OF SAID SECOND SET, AND MEANS TO PASS CURRENT THROUGH SAID METAL STRIP VIA SAID CURRENT CARRYING ROLLS, SO AS TO HEAT TREAT SAID METAL STRIP WHILE IT IS MOVING BETWEEN SAID CURRENT CARRYING ROLLS.