Patent ID: 6279898
Filing Date: 2001-08-28
Classification: B65H

Abstract:
An air cushion guide for sheet or web-formed material, comprising:at least one guide member formed with nozzle openings through which air is blown between said guide member and the guided material for supporting the guided material on a supporting air cushion located above said guide member;said guide member formed with at least two chambers extending side by side along a direction of travel of the guided material;said nozzle openings including a first group of nozzle openings characterizable by a first characteristic curve and communicating with a first one of said chambers, said first characteristic curve relating volumetric air flow emerging from said first group of nozzles to a pressure in said first one of said chambers;said nozzle openings including a second group of nozzle openings characterizable by a second characteristic curve and communicating with a second one of said chambers, said second characteristic curve relating volumetric air flow emerging from said second group of nozzles to a pressure in said second one of said chambers;said second characteristic curve being different from said first characteristic curve;at least one of two variables consisting of volumetric air flow emerging from the nozzles and flow speed of the air between the guide member and the guided material being adjustable independently of one another.