Dryer section
AssigneeJ. M. Voith GmbH
InventorsLudwig Hauser, Winfried Haessner
Life of this patent
Estimating the term…
Abstract
A dryer section in which a paper web to be dried meanders successively over several drying cylinders, which are arranged in two rows one above the other. To the top row of cylinders is allotted a top supporting belt and to the bottom row of cylinders a bottom supporting belt. Between each two drying cylinders each of the supporting belts runs over a carrier roll. At the open paper draws are provided web stabilizers of which each exhibits several nozzle elements with one air blow slot each and a web-guiding surface interacting with it. The direction of flow of the blow air is at all nozzle elements the same as the direction of travel of the paper web. Each web stabilizer is designed as an exhaust-air box surrounding the nozzle elements, to which an exhaust-air pipe is connected.
Claims15
A dryer section for a machine for the processing of fibrous webs, in particular paper webs, comprising:
- several heatable drying cylinders arranged in a top row and a bottom row one above the other so that the fibrous web can meander over each drying cylinder successively while traveling in a running direction through the dryer section;
- several carrier rolls associated with said several heatable drying cylinders, with at least one carrier roll disposed in one of said rows and located opposite a drying cylinder of the other row;
- at least one top supporting belt allotted to the top row of cylinders and at least one bottom supporting belt allotted to the bottom row of cylinders, with each supporting belt running in the direction of web travel on a drying cylinder and over a carrier roll;
- several air pockets associated with said heatable drying cylinders, each air pocket being delimited by a free peripheral part of a drying cylinder, by the opposite carrier roll and by the fibrous web;
- and
- several web stabilizers, each disposed in one of the air pockets, for contactless stabilization of the run of the fibrous web, each of said web stabilizers including at least one nozzle element extending transversely across the width of the fibrous web and connected to a supply-air pipe, the nozzle element having an air blow slot open towards the fibrous web and a web-guiding surface interacting therewith;
- said nozzle element being arranged in such a way that the direction of flow of the blow air over the web-guiding surface is the same as the running direction of the fibrous web, and said nozzle element having an exhaust side;
- said nozzle element being arranged inside an exhaust air box having an exhaust air space on the exhaust side of each nozzle element, to which exhaust space is connected a pipe for the re-exhaust of the supplied blow air.
Dependencies are inferred from the claim text.