Apparatus for perforating a nonlinear line of weakness

Patent metadata

Field	Value
Publication number	US-10293510-B2
Application number	US-201615072395-A
Country	US
Kind code	B2
Filing date	Mar 17, 2016
Priority date	Mar 17, 2015
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

A perforating apparatus has a base having at least one counter component. The counter component has a length, L CC , and a nonlinear shape having a shape width, W. A support is operatively engaged with the base. A blade having a length, L B , is disposed on the support so as to cooperate in interacting relationship with the counter component. The blade has a plurality of teeth. A web material is perforated as it passes between the base and the support and the blade cooperates with the counter component. A driving means is associated with one of the support and the base to reciprocally shift the one of the support or the base for a distance, D, in a shifting direction. The distance, D, is at least the translational distance that one tooth travels to cover the shape width, W.

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 that is periodic, has a wavelength and a shape width, W, equivalent to the wavelength;
a support operatively engaged with the base;
a blade having a length, L B , and being disposed on the support so as to cooperate in interacting relationship with the counter component, wherein the blade has a plurality of teeth, wherein a web is perforated as the web passes between the base and the support and the blade cooperates with the counter component; and
a driving means associated with one of the support and the base to reciprocally shift the one of the support or the base a distance, D, in an axial shifting direction, wherein the distance one of the plurality of teeth shifts is equivalent to the shape width, W;
wherein the counter component is helically mounted on the cylindrical base at an angle of from 4 degrees to 8 degrees with respect to a base longitudinal axis.

2. 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.

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

4. The apparatus of claim 1 wherein the base is moveable with respect to the support.

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

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

7. The apparatus of claim 1 wherein the driving means comprises a linear actuator.

8. 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 plurality of teeth;
a support operatively engaged with the base;
a blade having a length, L B , and being disposed on the support so as to cooperate in interacting relationship with the counter component, wherein the blade comprises a nonlinear shape that is periodic, has a wavelength and a shape width, W, equivalent to the wavelength, wherein a web is perforated as the web passes between the base and the support and the blade cooperates with the counter component; and
a driving means associated with one of the support and the base to reciprocally shift the one of the support or the base a distance, D, in an axial shifting direction, wherein the distance one of the plurality of teeth shifts is equivalent to the shape width, W;
wherein the counter component is helically mounted on the cylindrical base at an angle of from 4 degrees to 8 degrees with respect to a base longitudinal axis.

9. The apparatus of claim 8 wherein the support comprises a cylindrical support having a support longitudinal axis, wherein the support rotates about the support longitudinal axis.

10. The apparatus of claim 8 wherein the driving means is associated with the support.

11. The apparatus of claim 8 wherein the driving means is associated with the base.

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

13. The apparatus of claim 8 wherein the driving means comprises a linear actuator.

14. The apparatus of claim 8 wherein the support is moveable with respect to the base.

Assignees

• Procter & Gamble

Inventors

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

Classifications

• B26D7/265

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

• B26D7/26

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

• B65H35/10

  from or with devices for breaking partially-cut or perforated webs, e.g. bursters · CPC title

• B65H35/08

  from or with revolving, e.g. cylinder, cutters or perforators · CPC title

• B26F1/20 Primary

  with tools carried by a rotating drum or similar support (B26F1/22 takes precedence) · CPC title