Patent ID: 6619583
Filing Date: 2003-09-16
Classification: B65H

Abstract:
A device for contact-free guidance of a web material, comprising:a surface element guiding the web material over said surface element and forming a first longitudinal fold in the web material on said surface element, said surface element having a top, a bottom and boundary elements, said surface element being formed with an opening through which air flows from an air cushion underneath the web material to a space underneath said surface element; a top crossmember and a bottom crossmember disposed at said top and at said bottom of said surface element, respectively, said surface element decreasing in width continuously from said top crossmember to said bottom crossmember, and being defined by said boundary elements, said boundary elements having gaseous medium provided therein; and an adjustable closure element assigned to said opening of said surface element for varying, in accordance with a respective format of the web material guided over said surface element, a flow of gaseous-medium volume from the air cushion formed beneath the web material.