Reel-up and a method of reeling a paper web in the dry end of a paper machine

Patent metadata

Field	Value
Publication number	US-9969586-B2
Application number	US-201414771663-A
Country	US
Kind code	B2
Filing date	Feb 12, 2014
Priority date	Mar 27, 2013
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

The invention relates to a reel-up 3 for receiving and winding into a roll 4 a paper web W that arrives from a drying cylinder 2 in a paper making machine and which drying cylinder 2 is located upstream of the reel-up 3 and which paper web W follows a path of travel from the drying cylinder 2 to the reel-up 3 . The reel-up 3 comprises a rotatably mounted reel spool 5 onto which a paper web W can be wound to create a paper roll 4 of increasing diameter and an endless flexible belt 6 mounted for rotation along a predetermined path of travel such that the flexible belt 6 forms a loop. The flexible belt 6 is positioned adjacent to the reel spool 5 to engage the paper web W against the reel spool 5 during winding. The reel-up 3 is arranged to receive the paper web W at the end of a path of travel of the paper web W which ends in a point of contact P with the flexible belt 6 where the paper web W meets the flexible belt 6 such that a wedge-shaped space WS is formed between the flexible belt 6 and the paper web W. From the point of contact P, the paper web W will be carried by the flexible belt 6 to the reel-spool 5 . According to the invention, the reel-up 3 further comprises an air deflector 8 for diverting or evacuating air away from the wedge-shaped space WS formed between the flexible belt 6 and the paper web W. The invention also relates to a method of reeling a paper web.

First claim

The invention claimed is:

1. A reel-up ( 3 ) for receiving and winding into a paper roll ( 4 ) a paper web (W) that arrives from a drying cylinder ( 2 ) in a paper making machine and which drying cylinder ( 2 ) is located upstream of the reel-up ( 3 ) and which the paper web (W) follows a path of travel from the drying cylinder ( 2 ) to the reel-up ( 3 ), the reel-up ( 3 ) comprising:
a rotatably mounted reel spool ( 5 ) onto which the paper web (W) can be wound to create the paper roll ( 4 ) of increasing diameter;
an endless flexible belt ( 6 ) mounted for rotation along a predetermined path of travel such that the flexible belt ( 6 ) forms a loop, the flexible belt ( 6 ) being positioned adjacent to the reel spool ( 5 ) to engage the paper web (W) against the reel spool ( 5 ) during winding; and
an air deflector ( 8 ),
wherein:
the reel-up ( 3 ) is configured to receive the paper web (W) at the end of the path of travel of the paper web (W) which ends in a point of contact (P) with the flexible belt ( 6 ) where the paper web (W) meets the flexible belt ( 6 ) such that a wedge-shaped space (WS) is formed between the flexible belt ( 6 ) and the paper web (W) and from which point of contact (P) the paper web (W) will be carried by the flexible belt ( 6 ) to the reel-spool ( 5 ),
the air deflector ( 8 ) is positioned in the area immediately before the point of contact (P); and
the air deflector ( 8 ) is configured to divert flows of air entrained by at least one of the paper web (W) or the flexible belt ( 6 ) away from the wedge-shaped space (WS).

2. A reel-up ( 3 ) according to claim 1 , wherein the air deflector ( 8 ) is shaped as a beam, which extends in the cross machine direction.

3. A reel-up ( 3 ) according to claim 2 , wherein the air deflector ( 8 ) is arranged to be movable between a first position away from the point of contact (P) in which first position the air deflector ( 8 ) does not affect air entrained by the paper web (W) or the flexible belt ( 6 ) and a second position in which second position in which the air deflector ( 8 ) is so close to the point of contact (P) that flows of air entrained by at least one of the flexible belt ( 6 ) or the paper web (W) will be diverted away from the wedge-shaped space (WS).

4. A reel-up ( 3 ) according to claim 3 , wherein the air deflector ( 8 ) carries at least one blade ( 9 ) which can be adjusted in relation to the air deflector ( 8 ) when the air deflector ( 8 ) is in its second position such that the blade ( 9 ) can be brought closer to the flexible belt ( 6 ) or the paper web (W).

5. A reel-up ( 3 ) according to claim 2 , wherein the beam has a substantially triangular cross section.

6. A reel-up ( 3 ) according to claim 1 , wherein:
the flexible belt ( 6 ) is air permeable; and
at least one blow box ( 11 ) is arranged inside the loop of the flexible belt ( 6 ) between the point of contact (P) and the reel spool ( 5 ) such that an underpressure can be generated that draws the paper web (W) against the flexible belt ( 6 ).

7. A reel-up ( 3 ) according to claim 1 , wherein:
the flexible belt ( 6 ) is air permeable and guided in its loop by guide rolls inside the loop of the flexible belt ( 6 );
the reel spool ( 5 ) is arranged to engage the paper web (W) at a point between a guide roll located upstream of the reel spool ( 5 ) and a guide roll located downstream of the guide roll; and
the upstream guide roll is a suction roll which is partially wrapped by the flexible belt.

8. A reel-up ( 3 ) according to claim 1 , wherein the flexible belt ( 6 ) is air permeable and the reel-up also comprises a suction roll ( 10 ) which is located inside the loop of the flexible belt ( 6 ) at the point of contact (P) where the paper web meets the flexible belt, the suction roll ( 10 ) having a suction zone that acts both upstream and downstream of the point of contact (P).

9. A method of reeling a paper web on a reel-up according to claim 1 , in which method air is diverted from the wedge-shaped space (WS) formed between the flexible belt ( 6 ) and the paper web (W) by means of the air deflector ( 8 ).

10. A method according to claim 9 , which includes the step of moving the air deflector ( 8 ) from a first position away from the point of contact (P) to a second position in which the air deflector ( 8 ) is so close to the point of contact (P) that flows of air entrained by at least one of the flexible belt ( 6 ) or the paper web (W) will be diverted away from the wedge-shaped space (WS).

11. A method according to claim 9 , wherein:
the flexible belt ( 6 ) is air permeable and air is also evacuated away from the wedge-shaped space (WS) by means of a suction roll ( 10 ) which is located inside the loop of the flexible belt ( 6 ) at the point of contact (P) where the paper web (W) meets the flexible belt ( 6 ); and
the suction roll ( 10 ) has a suction zone that acts both upstream of and downstream of the point of contact (P).

Assignees

• Valmet Oy

Inventors

• Malmqvist Per-Olof
• Oennerloev Lars-Erik

Classifications

• B65H18/22 Primary

  by friction band · CPC title

• B65H20/06 Primary

  by friction band · CPC title

• B65H2601/211

  Entrapping air in or under the material · CPC title

• B65H2301/4143

  Performing winding process · CPC title

• B65H2801/84

  Paper-making machines · CPC title