Invention Grant
US08621966B2 Perforation anvil 有权
穿孔铁砧

Perforation anvil
Abstract:
A method and apparatus for perforating a web includes an anvil roll having an outer surface wherein at least a portion of the outer surface defines an anvil surface. The anvil surface includes a plurality of angled grooves having a variable groove width. The method may include phasing the cutting position on the anvil to effect varying perforation patterns.
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