Patent ID: 8377249

Claim:
A method for intermittently varying a speed of a portion of an advancing substrate, the method comprising the steps of: continuously advancing a substrate in a machine direction at a first speed, the substrate having a first surface disposed opposite of a second surface; engaging the substrate with a first guide member, wherein the first surface of the substrate is disposed on and contacts an outer radial surface of a first guide member; advancing the substrate from the first guide member to a second guide member, the second guide member being connected with a support member; engaging the substrate with the second guide member such that the first surface of the substrate is disposed on and contacts an outer radial surface of the second guide member; rotating the support member at a variable angular velocity such that the second guide member orbits around a center axis at a varying angular velocity as the support member rotates; advancing the substrate from the second guide member to a third guide member; engaging the substrate with the third guide member, wherein the first surface of the substrate is disposed on and contacts an outer radial surface of the third guide member; and advancing the substrate from the third guide member at a second speed, wherein the second speed is variable.