Apparatus for coating paper

Claim 1

IN COMBINATION, IN COATING APPARATUS FOR PAPER WEBS AND THE LIKE WHEREIN AN AQUEOUS HARDENABLE MINERAL COATING COMPOSITION IS APPLIED TO A TRAVELING WEB: AN UPPER RESILIENTLY COVERED ROTATBLE WEB CARRYING BACKING ROLL AND A LOWER ROTABLE APPLICATOR ROLL DEFINING WITH THE BACKING ROLL A COATING APPLICATION NIP THROUGH WHICH A WEB TO BE COATED IS PASSED FROM A COATING APPLICATION NIP INLET TO A COATING APPLICATION NIP OUTLET TO RECEIVE AN EXCESS OF AQUEOUS COATING COMPOSTION, SAID APPLICATION NIP LYING ON A VERTICALLY EXTENDING CENTER LINE BETWEEN THE BACKING AND APPLICATOR ROLLS; A SMALL DIAMETER DOCTOR ROD ROTATBLE COUNTER TO THE BACKING ROLL INDEPENDENTLY OF THE BACKING ROLL FRONTING ON THE OUTLET SIDE OF SAID APPLICATION NIP AROUND THE BACKING ROLL FROM SAID NIP AND FORMING WITH THE BACKING ROLL A SECOND AND PRESSURE NIP THROUGH WHICH THE WEB WITH COATING THEREON IS PASSED; THE SAID SECOND AND PRESSURE NIP BEING FROM ABOUT 2* TO NOT MORE THAN 30* OF ARC AROUND THE BACKING ROLL FROM THE COATINING APPLICATION NIP AND WHICH LATTER AND GREATER DISTANCE IS EQUAL IF UP TO 20 TO 30 TIMES THE DIAMETER OF THE SAID DOCTOR ROD, THE SAID DOCTOR ROD ALSO LYING WITHIN FROM ABOUT 0 TO 30* AROUND THE BACKING ROLL PERIPHERY FROM THE VERTICAL DIAMETER OF THE BACKING ROLL AND IN THE DIRECTION OF BACKING ROLL ROATION, AND SUPPORT MECHANISM FOR SAID DOCTOR ROD INCLUDING A SOCKET SUPPORTING SAID ROD AND A HOLDER SUPPORTING SAID SOCKET, SAID HOLDER PROJECTING REARWARDLY FROM SAID SOCKET AND ROD AND AWAY FROM SAID APPLICATION NIP OUTLET SIDE AND FORMING WITH THE HORIZONTAL AN ANGLE OF LESS THAN 30*.