Patent ID: 7422132
Filing Date: 2008-09-09
Classification: B65H,D21G

Abstract:
1. A vacuum belt conveyor equipped with lateral guidance for a web forming machine, the vacuum belt conveyor having a web transport side for transportation of a web threading tail, comprising: a frame having a first side and a second side; at least two rolls mounted for rotation to the frame; an air-permeable belt forming a loop around the at least two rolls and arranged for movement on the at least two rolls to form the vacuum belt conveyer; wherein a section of the belt loop is arranged to transport a web threading tail; wherein the section of the belt loop defines the web transport side of the vacuum belt conveyor and defines a plane; a source of vacuum arranged to draw air in a first direction, through the section of the belt loop arranged to transport the web threading tail; and air blows arranged on the first and second sides of the frame adjacent the web transport side of the vacuum belt conveyor, the air blows providing lateral guidance for keeping the web threading tail on the vacuum belt conveyor; wherein the air blows are spaced from and positioned above the web transport side of the vacuum belt.