Patent ID: 6444064
Filing Date: 2002-09-03
Classification: A61F,B65H

Abstract:
A registration method for 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 a 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.