US 6,387,220 B1 · Vacuum conveyor

Abstract

Apparatus for transferring at least a portion of a running web from a first section of a web making machine to a second section of the web making machine includes at least two pulleys, in which at least one is a driven pulley, a suction box coupled to a vacuum source, an air-pervious endless conveyor belt tensioned over the at least two pulleys to form a conveying run and a return run, and a device for creating a negative pressure at an inner surface of the conveying run. The at least one driven pulley is adapted to drive the endless conveyor belt over the at least two pulleys while the negative pressure propagates through the conveying run. The endless conveyor belt includes an upstream and a downstream end and the endless conveyor belt is pivotable around a pivot axis located in a region of the upstream end. The endless conveyor belt is pivotable to move the portion of the running web between the rope section and the portion is adapted to receive a full width of the running web. Apparatus also includes a control system for moving the downstream end into an area of the web width when a beginning of the at least a portion of the web has entered the rope section.

Claims19

Dependent claims

An apparatus for transferring at least a portion of a running web from a first section of a web making machine to a second section of the web making machine arranged downstream from the first section, relative to a web run direction, the second section including a portion adapted to receive a full width of the running web and a rope section located outside of the full width receiving portion, said apparatus comprising:

at least two pulleys, in which at least one is a driven pulley;
an air-pervious endless conveyor belt tensioned over said at least two pulleys to form a conveying run and a return run;
a device for creating a negative pressure at an inner surface of said conveying run;
said at least one driven pulley being adapted to drive said endless conveyor belt over said at least two pulleys while the negative pressure propagates through said conveying run;
an upstream and a downstream end and said belt conveyor being pivotable around a pivot axis located in a region of said upstream end, wherein said belt conveyor is pivotable to move the portion of the running web between the rope section and the portion adapted to receive a fall width of the running web;
and
a control system for moving the downstream end into an area of the web width when a beginning of the at least a portion of the web has entered the rope section.

4 more elements

Dependencies are inferred from the claim text.

Vacuum conveyor

Life of this patent

Vacuum conveyor

Life of this patent

Abstract

Claims19