Method for perforating a nonlinear line of weakness

Patent metadata

Field	Value
Publication number	US-12030739-B2
Application number	US-202318302860-A
Country	US
Kind code	B2
Filing date	Apr 19, 2023
Priority date	Mar 17, 2015
Publication date	Jul 9, 2024
Grant date	Jul 9, 2024

Abstract

A method for providing a nonlinear line of weakness on a web material including providing: a base, a support, a blade, and a driving means. The base may comprise at least one counter component having a length (L CC ) where the counter component comprises a nonlinear shape having a shape width (W). The support may be operatively engaged with the base. The blade may have a length (L B ) and may be disposed on the support so as to either contact or to come in close proximity with the counter component. At least one of the counter component and the blade may have a nonlinear shape and at least one of the counter component and the blade may comprise multiple segments.

First claim

What is claimed is:

1. An apparatus for providing a nonlinear line of weakness on a web material, the apparatus comprising:
a base comprising at least one counter component having a length (L CC ) wherein the counter component comprises a nonlinear shape having-a shape width (W);
a support operatively engaged with the base;
a blade having a length (L B ) and being disposed on the support so as to either contact or to come in close proximity with the counter component;
wherein at least one of the counter component and the blade has a nonlinear shape;
wherein at least one of the counter component and the blade comprises multiple segments;
wherein the base comprises a cylindrical base having a base longitudinal axis, wherein the base rotates about the base longitudinal axis, and the base longitudinal axis runs substantially perpendicular to a machine direction; and
wherein the counter component is helically mounted on the cylindrical base at an angle of greater than 0 degrees to about 45 degrees to the base longitudinal axis.

2. The apparatus of claim 1 , wherein the support is movable with respect to the base.

3. The apparatus of claim 1 , wherein the base is movable with respect to the support.

4. The apparatus of claim 1 , wherein the counter component is helically mounted on the cylindrical base at an angle of from about 2 degrees to about 20 degrees with respect to the base longitudinal axis.

5. The apparatus of claim 1 , wherein the nonlinear shape is periodic and comprises a wavelength, and the shape width (W) is substantially equivalent to the wavelength.

6. The apparatus of claim 1 , wherein the base is stationary in a cross machine direction.

7. The apparatus of claim 1 , wherein the driving means is associated with the support.

8. The apparatus of claim 1 , wherein the counter component comprises an anvil.

9. The apparatus of claim 1 , wherein the nonlinear shape is a sinusoidal shape.

10. The apparatus of claim 1 , wherein the counter component comprises a nonlinear shape.

11. The apparatus of claim 1 , wherein the blade has a plurality of teeth.

12. The apparatus of claim 1 , wherein the support is reciprocally shifted for at least half of the shape width (W).

13. The apparatus of claim 1 , wherein the base is reciprocally shifted for at least half of the shape width (W).

14. The apparatus of claim 1 , wherein the base comprises a cylindrical base having a base longitudinal axis, wherein the base rotates about the base longitudinal axis, and the base longitudinal axis runs substantially perpendicular to a machine direction.

15. The apparatus of claim 14 , wherein the counter component is helically mounted on the cylindrical base at an angle of greater than 0 degrees to about 45 degrees to the base longitudinal axis.

16. The apparatus of claim 14 , wherein the counter component is helically mounted on the cylindrical base at an angle of from about 2 degrees to about 20 degrees with respect to the base longitudinal axis.

17. The apparatus of claim 1 , wherein the nonlinear shape is periodic and comprises a wavelength, and the shape width (W) is substantially equivalent to the wavelength.

18. The apparatus of claim 1 , wherein the counter component comprises an anvil.

19. An apparatus for providing a nonlinear line of weakness on a web material, the apparatus comprising:
a base comprising at least one counter component having a length (L CC ) wherein the counter component comprises a nonlinear shape having-a shape width (W);
a support operatively engaged with the base;
a blade having a length (L B ) and being disposed on the support so as to either contact or to come in close proximity with the counter component;
wherein at least one of the counter component and the blade has a nonlinear shape;
wherein at least one of the counter component and the blade comprises multiple segments;
wherein the base comprises a cylindrical base having a base longitudinal axis, wherein the base rotates about the base longitudinal axis, and the base longitudinal axis runs substantially perpendicular to a machine direction; and
wherein the counter component is helically mounted on the cylindrical base at an angle of from about 2 degrees to about 20 degrees with respect to the base longitudinal axis.

20. An apparatus for providing a nonlinear line of weakness on a web material, the apparatus comprising:
a base comprising at least one counter component having a length (L CC ) wherein the counter component comprises a nonlinear shape having-a shape width (W);
a support operatively engaged with the base;
a blade having a length (L B ) and being disposed on the support so as to either contact or to come in close proximity with the counter component;
wherein at least one of the counter component and the blade has a nonlinear shape;
wherein at least one of the counter component and the blade comprises multiple segments; and
wherein the base comprises a cylindrical base having a base longitudinal axis, wherein the base rotates about the base longitudinal axis, and the base longitudinal axis runs substantially perpendicular to a machine direction.

Assignees

• Procter & Gamble

Inventors

• Slovut Deborah Sue
• Tanno Laura Marie
• Kien Kathryn Christian

Classifications

• B26D2007/2664

  for radial adjustment · CPC title

• B26F1/22

  to form non-rectilinear cuts, e.g. for tabs · CPC title

• B26D7/265

  Journals, bearings or supports for positioning rollers or cylinders relatively to each other · CPC title

• B26D7/2628

  Means for adjusting the position of the cutting member · CPC title

• B26D7/26

  Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member · CPC title