Centrally-holed paper roll with reinforcing element and method of manufacturing said roll
A roll of sheet product, in particular of tissue paper, with a central hole along its winding axis includes a cylindrical reinforcing element onto which the paper is wound. The reinforcing element includes at least one ring joined to the innermost turn of the roll, with a width less than the width of the roll and provided with a means of extracting the ring by pulling substantially along the axis of the roll.
1. A roll having a central hole along its winding axis, the roll comprising:
a roll of sheet product;
a cylindrical reinforcing element on which the sheet product is wound,
wherein the reinforcing element comprises at least one ring attached to an innermost turn of the roll of sheet product, with a width less than the width of the roll of sheet product and provided with a means of extracting the ring by pulling substantially along the axis of the roll, and
wherein each of the at least one ring comprises at least one slot that makes it possible, from the outer edge of the respective ring, to fold the material forming the respective ring towards the axis of the roll and so provide a grasping tab forming the extraction means.
2. The roll according to claim 1 , wherein the at least one slot follows the curvature of the respective ring and is in arc-of-circle form.
3. The roll according to claim 1 , wherein the at least one slot is axially oriented.
4. The roll according to claim 3 , wherein the at least one slot extends from an edge of the respective ring over a part of the width of the respective ring.
5. The roll according to claim 1 , wherein the at least one slot comprises two slots.
6. The roll according to claim 1 , wherein the at least one ring is flush with or slightly set back from one end of the roll.
7. The roll according to claim 1 , wherein the at least one ring is secured by gluing or by mechanical bonding to the innermost turn of the roll of sheet product.
8. The roll according to claim 1 , wherein the at least one ring has a width less than a third of the width of the roll of sheet product.
9. The roll according to claim 8 , wherein the width of the at least one ring is at least equal to a seventh of the width of the roll of sheet product.
10. The roll according to claim 1 , wherein the at least one ring comprises a first ring disposed in the central hole and a second ring disposed in the central hole axially offset relative to the first ring, the second ring secured in position without gluing.
11. A method of dispensing a roll of sheet product in a paper dispensing system with central unwinding utilizing the roll according to claim 1 , comprising centrally unwinding the roll of sheet product from the dispensing system.
12. Method of manufacturing a roll according to claim 1 , comprising:
fitting hoops on a spindle arranged to form, after transverse cutting, two of the at least one rings, providing an extraction means on each of the rings, winding a wide sheet product onto the spindle over the rings to form a log, extracting the spindle, and cutting the log through the hoops so as to obtain rolls with the rings.
13. The method according to claim 12 , wherein the hoops are fixed temporarily in rotation and in translation onto the spindle.
14. The method according to claim 13 , wherein the hoops are fixed temporarily onto the spindle by a mechanical means.
15. Method of manufacturing a roll according to claim 1 , comprising fitting the at least one ring in the hole provided in the roll.