Patent ID: 6743314
Filing Date: 2004-06-01
Classification: A61F,B65H

Abstract:
A registration method for phasing simultaneously advancing webs or 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 on the target web, wherein the target web pitch length is greater than the controlled web pitch length to pucker the target web to provide desired visual and tactile properties to a finished product.