Patent ID: 9023261
Filing Date: 2015-05-05
Classification: A61F,B26F,B29C,B29D,B29K,B31F,Y10T

Abstract:
1. An apparatus for aperturing a web, said apparatus comprising two intermeshing counter-rotating rolls that form a nip therebetween, said apparatus comprising: a) a generally cylindrical first roll, said first roll having a surface, a circumference, and a first axis, said first roll comprising a plurality of circumferentially extending ridges and grooves on the surface of the first roll that are oriented perpendicular to said first axis, wherein said ridges have a top surface and said grooves have a bottom surface; and b) a generally cylindrical second roll, said second roll having a surface, a circumference, and a second axis extending in a direction that is parallel to said first axis, said second roll comprising: