Paper converting plant

Patent metadata

Field	Value
Publication number	US-11273572-B2
Application number	US-201816642144-A
Country	US
Kind code	B2
Filing date	Oct 9, 2018
Priority date	Oct 18, 2017
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

Paper converting plant including a rewinder adapted to produce paper logs and having an inlet for feeding a paper web, a winding station where the logs are formed and an exit station for unloading the finished logs. The rewinder has walls delimiting a chamber inside which the logs are formed, and an air suction channel at a lower part of chamber. The suction channel exerts a suction causing the formation of an air flow directed from the top to the bottom inside the chamber. The chamber includes two semi-chambers communicating with the air suction channel such that a vertical air flow directed downwards is generated in each of them, the chamber being provided with a manner for regulating the vertical air flows providing vertically oriented identical air flow rates in the semi-chambers.

First claim

The invention claimed is:

1. A paper converting plant for converting paper webs, comprising:
a rewinder that is adapted to produce paper logs and has an inlet for feeding a paper web, a winding station where the paper logs are formed and an exit station for unloading the finished logs, wherein the rewinder is provided with a plurality of walls delimiting a chamber inside which the paper logs are formed, and an air suction channel disposed and acting at a lower part of said chamber, said air suction channel being adapted to exert a suction that causes the formation of an air flow directed from the top to the bottom inside the chamber, wherein said chamber is subdivided into two semi-chambers both communicating with the air suction channel such that a vertical air flow directed downwards is generated in each of them, said chamber being provided with regulating means for regulating said vertical air flows to provide vertically oriented identical air flow rates in the semi-chambers.

2. The plant according to claim 1 , wherein said air suction channel has an opening extending throughout the width of rewinder.

3. The plant according to claim 1 , wherein said rewinder comprises electric motors arranged outside the chamber.

4. The plant according to claim 1 , wherein said walls are inclined such that the containment chamber is narrowed at its bottom, in correspondence of said air suction channel.

5. The plant according to claim 1 , wherein said air suction channel is connected downstream to an air filtering device.

6. The plant according to claim 1 , wherein said air channel is connected downstream to an air filtering device and then to an inlet disposed at the top of said chamber to enter filtered air in the same chamber.

7. The plant according to claim 1 , further comprising a containment cabin adapted to delimit the environment surrounding the plant from a remaining part of a shed in which the same plant is located.

8. The plant according to claim 7 , wherein said chamber is inside said containment cabin.

9. The plant according to claim 8 , wherein the motors of said rewinder are external to said containment cabin.

10. The plant according to claim 1 , wherein the walls of the containment chamber are provided with removable or openable doors provided with respective activation means.

11. The plant according to claim 1 , further comprising residues separation means for separating possible residues carried by said air flows according to the mass and/or the size of the residues themselves.

12. The plant according to claim 11 , wherein said residues separation means comprise a connecting channel connecting said chamber to said air suction channel, a container located at the bottom of said connection channel, and air blowing means adapted to convey a part of said residues towards the suction channel, the air suction channel being arranged laterally with respect to an exit direction of the residues from the containment chamber, said connecting channel having a lower part communicating with the container.

13. The plant according to claim 1 , wherein said chamber is divided into two semi-chambers and by a paper web being converted, said flows of equal amount in the two semi-chambers and determining a pressure of the same amount on the two sides of the paper web.

14. The plant according to claim 1 , wherein said means for regulating said air flows comprise perforated bodies having a same area and arranged in each of said semi-chambers in zones crossed by said air flows.

Assignees

• Futura Spa

Inventors

• Perini Fabio
• Giurlani Giovacchino
• Catalini Andrea

Classifications

• B65H18/16

  by friction roller · CPC title

• B65H2406/31

  Suction box; Suction chambers · CPC title

• B65H19/2269

  Cradle · CPC title

• B31B50/16

  Cutting webs · CPC title

• B31B70/16

  Cutting webs · CPC title