Patent ID: 8539867
Filing Date: 2013-09-24
Classification: B26D,B26F,G03G,Y10T

Abstract:
1. A method comprising: moving a medium between and relative to both a first rotatable member, supporting a first structure, and a second rotatable member, supporting a first blade, to selectively position one of a continuum of portions of the medium relative to the first structure and the first blade, wherein the first rotatable member includes consecutive anvils, including a first anvil and a second anvil, without any blade between the first anvil and the second anvil along a perimeter of the first rotatable member, and consecutive blades, including a first blade and a second blade, without any anvil between the first blade and the second blade along the perimeter of the second rotatable member; and perforating the medium between the first structure and the first blade, wherein the second rotatable member is coupled to a second structure comprising the second blade, the method further comprising: rotating the first rotatable member in a clockwise direction while concurrently rotating the second rotatable member in a counterclockwise direction to perforate the medium between the first structure and the first blade of the second rotatable member; and rotating the first rotatable member in the counterclockwise direction while concurrently rotating the second rotatable member in the clockwise direction to perforate the medium between the second structure and the second blade of the first rotatable member.