SYSTEM FOR CONTROLLING THE POSITION OF A STRIP OF MATERIAL WITH RESPECT TO LINEAR MOVABLE SEAM JOINING DEVICE

摘要

A system for controlling the position of a strip of ----- with respect to a linear movable seam joining device ----- in response to belt control signals representative of ----- mined positions of said seam joining device and ----- signals representative of desired seam locations, characterized in that it comprises:at least two sets of opposed belts and ----- support structures on each side of the focus of a seam joining device, wherein the opposing surface of each of said belts include material surfaces with are adapted to frictionally engage an adjacent surface of said material; andwherein one or more of said support structure are not state support structures, each including an ----- coupled to the associated belt, said actuator ----- responsive to applied belt control signals and ----- for selectively controlling its associated belt to be a first state part overlying an associated ----- of the locus of said seam joining device of it a second state outside the locus of said seam local device whereby each two state support structure controlled to be in its first state when and ----- joining device is positioned outside the portions and said locus associated with that belt, and to ----- its second state when said seam joining ----- positioned at least in part within said portions.