Picker for divellicating pulp

Abstract

Abstract AN APPARTUS FOR DIVELLICATING SHETS INTO THEIR COMPONENT FIBERS, AND A METHOD THEREFORE, INCLUDES A CYLINDRICAL DRUM HAVING PICKING TEETH ON THE SURFACE THEREOF AND A PULP SHEET FEED GUIDE WHICH IS ADAPTED TO CONTACT THE TOP SURFACE OF THE OUTERMOST PULP SHEET SO THAT AT EACH POINT OF CONTACT BETWEEN A PLANE TANGENT TO THE TEETH TEETH THE ANGLE BETWEEN THE PLANE TANGENT TO THE TEETH AT THE POINT OF CONTACT AND THE PLANE OF THE PULP SHEET AT THE CONTACT POINT IS NOT IN EXCESS OF ABOUT 10*. THIS CAN BE ACHIEVED BY THE USE OF A FORMING GUIDE, THE INNER SURFACE OF WHICH SPIRALLY APPROACHES THE PICKING TEETH TO A POINT OF APPROXIMATELY ZERO CLERANCE, THE RADIAL DISTANCE, R, FROM ANY POINT OF THE INNER SURFACE OF THE GUIDE TO THE CENTER AXIS OF THE DRUK BEING DETERMINED ACCORDING TO THE FOLLOWING FORMULA: R=RO(1+KO) WHEREIN RO IS THE RADIAL DISTANCE FROM THE INNER GUIDE SURFACE TO THE CENTER AXIS OF THE DRUM AT THE POINT OF APPROXIMATELY ZERO CLERANCE, O IS THE ANGLE IN RADIANS BETWEEN THE LINES CORRESPONDING TO RO AND THE LINE CORRESPONDING TO R, AND K IS A CONSTANT WHICH IS GREATER THAN ZERO AND LESS THAN 0.176.

Inventors

• 👤 David W Appel
• 👤 Charles L Sanford

Bibliographic Details