Machine and process for the production of logs of paper material

Patent metadata

Field	Value
Publication number	US-10829328-B2
Application number	US-201816494460-A
Country	US
Kind code	B2
Filing date	Mar 2, 2018
Priority date	Mar 29, 2017
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

Rewinding machine for the production of logs of paper material, including a winding station in which is fed a paper web and, in sequence, more tubular cores, and in which station winding are arranged a first, a second and a third winding roller cooperating with each other to wind a predetermined amount of said paper web onto each core. The machine includes a fourth winding roller which is connected to respective moving elements adapted to arrange it in a first inoperative position until the diameter of a log in the winding station is lower than a first predetermined value and a second operating winding position when the diameter of the log being formed is equal to said first predetermined value, the moving elements being controlled to maintain the fourth roller in the second operating winding position until the diameter of the log reaches a second final value higher of the first predetermined value.

First claim

The invention claimed is:

1. A rewinding machine for the production of logs of paper material, comprising:
a winding station in which a paper web is fed and, in sequence, more tubular cores, and in which station winding are arranged a first, a second and a third winding roller cooperating with each other to wind a predetermined amount of said paper web onto each core, the machine further comprises the winding station having a fourth winding roller which is connected to respective moving means adapted to arrange it in a first inoperative position until the diameter of a log in the winding station is lower than a first predetermined value and a second operating winding position when the diameter of the log being formed is equal to said first predetermined value, said moving means being controlled to maintain the fourth roller in the second operating winding position until the diameter of the log reaches a second final value higher of the first predetermined value such that, in a first phase, which ends with the attainment of said first predetermined value of the diameter of the log being formed, the winding of the web on the cores is realized by said first, second and third winding roller, and, at a subsequent phase, the log is completed in cooperation by the four winding rollers until said second final value of the diameter of the log is reached.

2. The machine according to claim 1 , wherein said third roller is connected to respective moving means adapted to move it cyclically to and from a point of arrival of the cores defined between the first and the second roller winding.

3. The machine according to claim 2 , wherein the means for moving said third roller comprise a rotary actuator connected to two arms that supports the fourth roller, said arms being adapted to rotate about a pin whose axis is parallel to the axis of the same third roller.

4. The machine according to claim 1 , wherein the axes of said four rollers are parallel to each other.

5. The machine according to claim 1 , wherein the angular speeds of the third and the fourth winding roller are controlled independently of each other.

6. The machine according to claim 1 , wherein the movement of the fourth roller between the inoperative position and the operative winding position is progressive.

7. The machine according to claim 1 , wherein the movement of the fourth roller (R 4 ) between the operating winding position and the inoperative position is snap movement.

8. The machine according to claim 1 , wherein said means for moving the fourth roller comprise a rotary actuator connected to two arms that support the fourth roller, said arms being adapted to rotate about the axis of the third roller.

9. A Process for the production of logs of paper material, comprising:
supplying a paper web and, in sequence, more tubular cores in a winding station of a rewinding machine, in which winding station are arranged a first, a second and a third winding roller cooperating with each other to wind a predetermined amount of said paper web onto each core, wherein, in said winding station, a fourth winding roller which is arranged in a first inoperative position until the diameter of a log in the winding station is lower than a first predetermined value and a second operating winding position when the diameter of the log being formed is equal to said first predetermined value, said fourth winding roller being maintained in the second operating winding position until the diameter of the log reaches a second final value higher of the first predetermined value such that, in a first phase, which ends with the attainment of said first predetermined value of the diameter of the log being formed, the winding of the web on the cores is realized by said first, second and third winding roller, and, at a subsequent phase, the log is completed in cooperation by the four winding rollers until said second final value of the diameter of the log.

10. The process according to claim 9 , wherein said third roller is moved cyclically to and from a point of arrival of the cores defined between the first and the second winding roller.

11. The process according to claim 9 , wherein the angular speeds of the third and fourth winding roller are controlled independently of each other.

12. The process according to claim 9 , wherein the movement of the fourth roller between the inoperative position and the operative winding position is progressive.

13. The process according to claim 9 , wherein the movement of the fourth roller between the operating position of the winding and the inoperative position is a snap movement.

14. The process according to claim 9 , wherein said fourth roller exerts on the log a pressure which favors the bonding of the final edge of the paper web on the underlying paper.

15. The process according to claim 9 , wherein said fourth roller exerts on the log a pressure directed towards the first roller.

Assignees

• Futura Spa

Inventors

• Perini Fabio

Classifications

• B65H19/2269 Primary

  Cradle · CPC title

• B65H2301/41361

  sequentially used roll supports for the same web roll · CPC title