Patent ID: 8973267
Filing Date: 2015-03-10
Classification: B23C,B31F,Y10T

Abstract:
1. A method for manufacturing an embossing roller comprising providing a roller with an axis and a plurality of protuberances arranged according to a geometrical distribution, each of said protuberances being substantially in a shape of a truncated pyramid with a major base closer to the axis of the roller, a top surface further away from the axis of the roller, and planar side surfaces generated by chip removal using a hob, wherein chip-removal machining of top surfaces of the protuberances is completed by said hob in absence of subsequent grinding, and said hob includes teeth with grooves therebetween wherein at least some of the grooves have a profile that is curvilinear in cross-sectional view so that said hob shapes at least some of said top surfaces with rounded edges radiusing to at least some of the planar side surfaces of said protuberances, wherein said protuberances are provided in helically aligned arrangements around the axis of the roller, and wherein said top surfaces are generated via interaction of the roller with said grooves of said hob, each said top surface being generated by chip removal using said hob.