Patent ID: 7066065
Filing Date: 2006-06-27
Classification: B26F,E04B,Y10T

Abstract:
1. A method of selecting lineal lengths for notches and teeth along a peripheral edge of a circular compression-cutting blade and forming notches and teeth along a peripheral edge of a circular compression-cutting blade whereby the circular compression-cutting blade, in use, forms a longitudinally extending series of cuts and separable connectors in a fibrous insulation blanket so that the fibrous insulation blanket can be handled and installed as a unit or separated by hand at the longitudinally extending series of cuts and separable connectors into blanket sections having widths less than a width of the fibrous insulation blanket, comprising: selecting a notch length NL for each of the notches in inches; selecting a tooth length for each of the teeth in inches; adding the notch length and tooth length to obtain a pitch length PL in inches; inserting the notch length NL and the pitch length PL in the following empirical equation for finding a tear index TI: solving for TI; and where the TI is between −70 and +70, using the selected notch length and tooth length as a notch length and a tooth length of the notches and teeth to be formed in a circular compression cutting blade for cuffing fibrous insulation blankets; and forming notches and teeth, having the notch length and the tooth length, in a circular compression-cutting blade for cutting fibrous insulation blankets.