Doctor blade holding assembly

Abstract

Abstract A DOCTOR BLACE HOLDING ASSEMBLY IS DISCLOSED HAVING A PIVOTABLE DOCTOR BACK PARALLEL TO AND SPACED FROM A ROLL OF A PAPER MAKING MACHINE. A RESILIENT BLADE EXTENDS ALONG THE ENTIRE WIDTH OF THE ROLL FOR ENGAGING AND SCYAPING THE SURFACE OF THE ROLL. A RESILIENT MEANS OF ONE OR MORE MOLDINGS HAVING INTEGRAL FIRST AND SECOND PORTIONS CONNECT THE BLADE TO THE DOCTOR BACK. THE FIRST PORTION OF THE MOLDING IS RELATIVELY LONG AND THIN SO AS TO BE RESILIENT AND IS CONNECTED TO THE DOCTOR BACK TO PROJECT THE ENTIRE MOLDING AS A CANTILEVER TOWARD THE ROLL WITH THE SECOND PORTION OF THE MOLDING PROVIDING A BLADE HOLDER ON THE PROJECTING END OF THE MOLDING AND THE FIRST PORTION PROVIDING RESILIENCY TO SUPPLEMENT THE RESILIENCY OF THE BLADE FOR IMPROVED CONTOUR FOLLOWING AN PRESSURIZED SCRAPING OF THE ROLL. THE RESILIENT MEANS, EITHER A SINGLE MOLDING OR SEGMENTS BONDED TOGETHER ALONG EDGES NORMAL TO THE ROLL, MAY COVER THE ENTIRE SPACE BETWEEN THE DOCTOR BACK AND THE ROLL. A MOLDING IS ALSO DISCLOSED WITH A FIRST PORTION THAT IS TAPERED TO PROVIDE A DECREASING THICKNESS FROM THE DOCTOR BACK END THEREOF TOWARD THE BLADE HOLDING PORTION TO PROVIDE DESIRED FLEXIBILITY AND DEFLECTION CHARACTERISTICS WITH THE GREATER THICKNESS OF THE MOLDING BEING IN THE AREA WHERE THE BENDING MOVEMENT IS CONCENTRATED, THAT RESULTS FROM BENDING THE MOLDING IN A DIRECTION TRANSVERSE TO THE BLADE.

Inventors

• 👤 Donald B De Noyer

Bibliographic Details