Voith Sulzer Papiertechnik Patent Gmbh

George Kutak-Petrik

Allan Broom

Wolfgang Drefs

Leif Mohrsen

Process for transferring at least a portion of a running web from a first section of a web making machine includes rotating an endless conveyor belt by driving at least one driven pulley, creating a negative pressure at an inner surface of endless conveyor belt as endless conveyor belt is guided over suction box, and guiding the at least a portion of running web onto endless conveyor belt. Process also includes transferring the at least a portion of the running web from endless conveyor to rope section located outside of a web width, pivoting endless conveyor belt around the pivot axis to move downstream end into an area of rope section one of at and before transferring, and pivoting endless conveyor belt around pivot axis to move downstream end into an area of the at least a portion of running web and inside web width.

Vacuum conveyor

Vacuum conveyor and process for transporting at least a portion of a material web in a web travel direction. The vacuum conveyor includes two pulleys, a suction box positioned between the two pulleys, and an endless conveyor belt arranged around the two pulleys to form a loop. The suction box is positioned within the loop and the loop includes a conveyor run adapted to contact and guide the material web and a return run moving in a direction opposite the conveyor run. The suction box includes a suction opening positioned adjacent the conveyor run to suction the material web onto the conveyor belt and an exhaust opening positioned adjacent the return run. A vacuum source is coupled to the exhaust opening through the return run. The process includes creating a suction air flow from the vacuum source to the suction box through the return run of the conveyor belt, suctioning the at least a portion of the material web onto a conveying run of an endless conveyor with a suction box having a suction opening positioned adjacent at least a portion of the conveying run, and moving the endless conveyor to transport the at least a portion of the material web.

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.

Growing community of inventors

New Westminster, Canada

George Kutak-Petrik