Patent ID: 6764563
Filing Date: 2004-07-20
Classification: A61F,B65H

Abstract:
A registration method far phasing simultaneously advancing webs of material having variable pitch lengths, the method comprising the steps of:a. providing a continuous target web containing consecutively spaced target objects along a path at a first velocity, the target web having a target web pitch length between consecutive target objects; b. providing a continuous controlled web of material preprinted with consecutively spaced preprinted objects along a path at a second velocity, the controlled web having controlled web pitch length between consecutive preprinted objects; c. detecting the preprinted objects of the controlled web by sensing by an optic that electronically strobes a resolver providing actual position data; d. generating an error signal based upon the detection of the preprinted objects of the controlled web and comparing to a fixed target position constant; e. adjusting the controlled web pitch length such that the controlled web pitch length is approximately equal to the target web pitch length to maintain registration due to pitch mismatch; and f. adjusting the second velocity such that the preprinted objects are shifted toward the target objects a the target web, wherein the controlled web pitch length is greater than the target itch length to pucker the controlled web to provide desired visual and tactile properties to a finished product.