Paper Machine With One or a Plurality of Valve Devices

Abstract

A piezo nozzle system can be used in a paper machine. Contrary to all expectations, piezo nozzle systems have proven to be particularly suitable for use in the extreme ambient conditions of a paper machine. Despite the high degree of humidity, the use of piezo nozzle systems allows a high degree of control and dynamics to be achieved when using controlled or regulated valve devices in a paper machine. Furthermore, the use of piezo nozzle systems ensures a high availability and stability of the valve devices while having a robust and extremely compact design.

1 . A paper machine comprising at least one valve device, which has at least one piezo nozzle system, wherein the valve device has a piezo nozzle system provided for the coating of paper. 
     
     
         2 . The paper machine according to  claim 1 , wherein the piezo nozzle system is designed to apply size. 
     
     
         3 . The paper machine according to  claim 1 , wherein the piezo nozzle system is designed to apply dyestuffs. 
     
     
         4 . The paper machine according to  claim 1 , wherein at least one piezo nozzle system being provided to moisten paper. 
     
     
         5 . The paper machine according to  claim 1 , wherein the piezo nozzle system has a plurality of zones, which can be driven in order to influence the flow rate of the respective zone. 
     
     
         6 . The paper machine according to  claim 1 , wherein at least one piezo nozzle system is provided in the region of the headbox in order to apply fibrous stock to a wire. 
     
     
         7 . The paper machine according to  claim 6 , wherein the piezo nozzle system is designed to influence the fiber orientation. 
     
     
         8 . The paper machine according to  claim 1 , wherein a cleaning device for a wire is provided which has at least one piezo nozzle system. 
     
     
         9 . The paper machine according to  claim 1 , wherein a cutting device for paper is provided which has at least one piezo nozzle system, with the aid of which a jet cutting the paper is formed. 
     
     
         10 . A method of operating a paper machine comprising at least one valve device, which has at least one piezo nozzle system, the method comprising the step of coating paper with a piezo nozzle system of said valve device. 
     
     
         11 . The method according to  claim 10 , comprising the step of applying size by means of the piezo nozzle system. 
     
     
         12 . The method according to  claim 10 , comprising the step of applying dyestuffs by means of the piezo nozzle system. 
     
     
         13 . The method according to  claim 10 , comprising the step of moistening paper by at least one piezo nozzle system. 
     
     
         14 . The method according to  claim 10 , comprising the step of driving a plurality of zones of the piezo nozzle system in order to influence the flow rate of the respective zone. 
     
     
         15 . The method according to  claim 10 , comprising the step of applying fibrous stock to a wire by the at least one piezo nozzle system arranged in the region of the headbox. 
     
     
         16 . The method according to  claim 15 , comprising the step of influencing the fiber orientation by the piezo nozzle system. 
     
     
         17 . The method according to  claim 10 , comprising the step of cleaning a wire by means of at least one piezo nozzle system. 
     
     
         18 . The method according to  claim 10 , comprising the step of cutting paper by means of at least one piezo nozzle system with the aid of which a jet cutting the paper is formed.