Apparatus for winding a web of paper material and a method of removing dust

Patent metadata

Field	Value
Publication number	US-10364113-B2
Application number	US-201716082495-A
Country	US
Kind code	B2
Filing date	Feb 27, 2017
Priority date	May 4, 2016
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

Abstract

The invention relates to an apparatus for winding a paper web. It comprises a rotatably mounted reel spool ( 3 ) onto which paper can be wound and an endless flexible belt ( 5 ) which is permeable to air and supported by support rolls ( 12 ). The flexible belt is positioned adjacent the reel spool ( 3 ) to engage the web against the reel spool during winding such that the endless flexible belt is deflected from the path of travel. The flexible belt has a web-contacting side ( 6 ). An actuator ( 9 ) is arranged to position the reel spool ( 3 ) and the flexible belt relative to each other to vary the amount of deflection. The apparatus further comprises a cleaning device ( 11 ) with at least one nozzle for blowing air against the web-contacting side of the flexible belt at a point where the flexible belt is not in contact with the paper. The invention also relates to a method of removing dust particles.

First claim

The invention claimed is:

1. An apparatus ( 1 ) for winding a web of paper material into a roll ( 2 ), the apparatus ( 1 ) comprising:
a rotatably mounted reel spool ( 3 ) onto which a paper web can be wound to create a roll ( 2 ) of increasing diameter;
an endless flexible belt ( 5 ) which is permeable to air and supported by a plurality of support rolls ( 12 ) for rotation along a predetermined path of travel such that the endless flexible belt ( 5 ) forms a loop and wherein the predetermined path of travel is defined by the path of the endless flexible belt ( 5 ) around the support rolls ( 12 ), the endless flexible belt ( 5 ) being positioned adjacent to the reel spool ( 3 ) to engage the web against the reel spool ( 3 ) during winding such that the endless flexible belt ( 5 ) is deflected from the predetermined path of travel by an amount relative to the amount of paper wound on the reel spool ( 3 ), the endless flexible belt ( 5 ) having a web-contacting side ( 6 ) that contacts the paper on the reel spool ( 3 ) during winding and an inner side ( 7 ) facing away from the paper on the reel spool ( 3 );
a deflection sensor ( 8 ) mounted adjacent to the endless flexible belt ( 5 ), the deflection sensor ( 8 ) being arranged to measure the amount of deflection of the endless flexible belt ( 5 ) from the predetermined path of travel;
an actuator ( 9 ) for positioning the reel spool ( 3 ) and the endless flexible belt ( 5 ) relative to each other to vary the amount of deflection of the endless flexible belt ( 5 );
a controller ( 10 ) connected to the deflection sensor ( 8 ) and the actuator ( 9 ) for controlling the amount of deflection of the endless flexible belt ( 5 ) as the roll ( 2 ) increases in diameter;
a device generating underpressure located inside the loop of the endless flexible belt and arranged to create an underpressure on the inside of the loop such that a paper web travelling on the endless flexible belt ( 5 ) towards the rotatably mounted spool ( 3 ) will be drawn against the endless flexible belt ( 5 ); and
at least one cleaning device ( 11 ), which cleaning device comprises at least one air nozzle and which cleaning device is arranged to be capable of blowing pressurized air against at least one of the two sides ( 6 , 7 ) of the endless flexible belt ( 5 ),
wherein the at least one cleaning device ( 11 ) is arranged to blow air against the web-contacting side ( 6 ) of the endless flexible belt ( 5 ) at a point where the endless flexible belt ( 5 ) is not in contact with the paper material such that dust particles will be removed from the surface of the web-contacting side ( 6 ) of the endless flexible belt ( 5 ).

2. An apparatus according to claim 1 , wherein the at least one cleaning device is arranged to be capable of blowing pressurized air over at least 80% of the width of the endless flexible belt.

3. An apparatus according to claim 1 in which the at least one air nozzle ( 13 ) is arranged at such a distance from the endless flexible belt ( 5 ) and at such an angle relative to the surface of the flexible member that pressurized air from the at least one nozzle ( 13 ) does not have to travel more than 25 mm from the nozzle ( 13 ) until it reaches the surface of the endless flexible belt ( 5 ).

4. An apparatus according to claim 3 , wherein the distance between the at least one nozzle ( 13 ) and the endless flexible belt ( 5 ) is in the range of 5 mm-20 mm.

5. An apparatus according to claim 3 , wherein the distance between the at least one nozzle ( 13 ) and the endless flexible belt ( 5 ) is in the range of 10 mm-15 mm.

6. An apparatus ( 1 ) according to claim 1 , wherein the at least one cleaning device ( 11 ) is arranged to blow air against the inner side ( 7 ) of the endless flexible belt ( 5 ).

7. An apparatus ( 1 ) according to claim 1 , wherein the at least one cleaning device ( 11 ) is arranged to blow air against the web-contacting side ( 6 ) of the endless flexible belt ( 5 ) at a point where the endless flexible belt ( 5 ) passes over a support roll ( 12 ) such that the air is blown against the web-contacting side ( 6 ) of the endless flexible belt when the inner side ( 7 ) of the endless flexible belt ( 5 ) contacts the support roll ( 12 ).

8. An apparatus ( 1 ) according to claim 1 , wherein:
the at least one cleaning device ( 11 ) comprises a plurality of nozzles ( 13 ) arranged to blow pressurized air against at least one side ( 6 , 7 ) of the endless flexible belt ( 5 ); and
the nozzles ( 13 ) are distributed in a direction perpendicular to the direction in which the endless flexible belt ( 5 ) moves and which plurality of nozzles ( 13 ) extend over the entire width of the endless flexible belt ( 5 ) such that at least one side ( 6 , 7 ) of the endless flexible belt ( 5 ) can be exposed to pressurized air over its entire width.

9. An apparatus ( 1 ) according to claim 8 , wherein the plurality of nozzles ( 13 ) extend in a straight row over the entire width of the endless flexible belt ( 5 ).

10. An apparatus ( 1 ) according to claim 1 , wherein:
the at least one cleaning device ( 11 ) comprises at least one nozzle ( 13 ) arranged to blow pressurized air against at least one side ( 6 , 7 ) of the endless flexible belt ( 5 ); and
the at least one nozzle ( 13 ) is arranged to be movable in a direction that is at least partially perpendicular to the direction in which the endless flexible belt ( 5 ) moves as it follows its predetermined path.

11. A method of removing dust particles from an apparatus ( 1 ) according to claim 1 , wherein the method comprises the steps of:
blowing pressurized air against at least one of the two sides ( 6 , 7 ) of the endless flexible belt ( 5 ) such that dust particles are blown off from the endless flexible belt ( 5 ); and
blowing air against the web-contacting side ( 6 ) of the endless flexible belt ( 5 ) at a point where the endless flexible belt ( 5 ) is not in contact with the paper material such that dust particles will be removed from the surface of the web-contacting side ( 6 ) of the endless flexible belt ( 5 ).

12. A method according to claim 11 , wherein the method also comprises blowing air against the inner side ( 7 ) of the endless flexible belt ( 5 ).

13. A method according to claim 11 , wherein pressurized air is blown over the entire width of the endless flexible belt ( 5 ).

14. A method according to claim 13 , wherein at least one nozzle ( 13 ) that blows pressurized air against the endless flexible belt ( 5 ) is moved across the endless flexible belt ( 5 ) in a direction that is at least partially perpendicular to the direction in which the endless flexible belt ( 5 ) moves as it follows its predetermined path.

15. A method according to claim 11 , wherein at least one nozzle ( 13 ) blows pressurized air against the web-contacting side ( 6 ) of the endless flexible belt ( 5 ) at a point where the endless flexible belt ( 5 ) passes over a support roll ( 12 ) such that the air is blown against the web-contacting side ( 6 ) of the endless flexible belt when the inner side ( 7 ) of the endless flexible belt contacts the support roll ( 12 ).

16. A method according to claim 11 , wherein the cleaning device ( 11 ) is supplied with pressurized air which has an overpressure which is at least 3 bar.

17. An apparatus according to claim 1 , wherein the at least one cleaning device is arranged to be capable of blowing pressurized air over at least 90% of the width of the endless flexible belt ( 5 ).

Assignees

• Valmet Oy

Inventors

• Malmqvist Per-Olof
• Candutti Massimiliano
• Carlsson Tomas

Classifications

• B65H18/10

  Mechanisms in which power is applied to web-roll spindle · CPC title

• B65H2701/177

  Fibrous or compressible material · CPC title

• B65H2406/122

  Nozzles · CPC title

• B65H2301/41468

  centre and nip drive · CPC title

• B65H18/22 Primary

  by friction band · CPC title