Patent ID: 6250189
Filing Date: 2001-06-26
Classification: B26D,B26F,H01L,Y10T

Abstract:
A method of cutting an article from a sheet material using a rotary die cutter, comprising:a) providing a die shaft having an outer circumference with at least two die shaft bores, each of said die shaft bores having a die shaft outer periphery counterbore coaxially formed in said die shaft and respectfully aligned with said die shaft bores, wherein said die shaft outer periphery counterbores are located at said outer circumference of said die shaft and wherein said die shaft outer periphery counterbores relieve stresses in said die shaft imposed by a die cutting insert mounted to said die shaft;b) providing a die cutting insert having a die cutting insert outside periphery and a die cutting insert inside periphery, said die cutting insert having first and second spaced apart ends;c) providing a knife formed about the outside periphery of said die cutting insert, said knife having a cutting edge and first and second side walls with said first and second sidewalls being aligned at an angle of at least 15 degrees relative to one another; andd) removably attaching said die cutting insert at said die cutting insert inside periphery to said die shaft at said outer circumference of said die shaft, wherein at least one die cutting insert aperture is formed adjacent to each of said first and second ends and extending completely through said die cutting insert, and wherein at least two threaded bolts are sized to mate with said die cutting insert apertures and secure said die cutting insert to said die shaft bores formed in said die shaft.