Claims
- 1. A continuous method of providing individual sheets from a web having opposed, first and second edges and a substantially infinite length, comprising the following steps:
a) forming a line of weakness comprising perforations and scores extending substantially from the first edge to the second edge; and b) applying a force substantially parallel to the length of the web sufficient to separate an individual sheet from the web at the line of weakness.
- 2. The method of claim 1 wherein the step of forming the line of weakness comprises applying laser energy to the web.
- 3. The method of claim 1 wherein the step of forming the line of weakness comprises applying ultrasonic energy to the web.
- 4. The method of claim 1 wherein the step of forming the line of weakness comprises passing the web through a nip between a knife and knife abutting means.
- 5. The method of claim 1 wherein the web comprises polymeric film.
- 6. The method of claim 5 wherein the polymeric film has apertures formed therein.
- 7. The method of claim 1 wherein the line of weakness is substantially perpendicular to the length of the web.
- 8. A continuous method of providing individual sheets from a web having opposed, first and second edges and a substantially infinite length, comprising the following steps:
a) providing a knife and a knife abutting means, both having a web contacting surface, wherein at least one of the knife and abutting means web contacting surfaces comprises a plurality of surface continuities and a plurality of surface discontinuities having a depth and a lateral width; b) positioning a first portion of the web in a nip between the web contacting surfaces, wherein a second portion of the web extending beyond the contacting surfaces defines an individual sheet; c) converging the knife and the knife abutting means, thereby perforating the web in regions corresponding to the surface continuities and scoring the material in regions corresponding to the surface discontinuities; and d) applying a force substantially parallel to the length of the web sufficient to separate the individual sheet from the web at the line of weakness.
- 9. The method of claim 8 wherein the discontinuities provide a total depth of less than about 95% of the material's thickness.
- 10. The method of claim 8 wherein the discontinuities provide a total depth of about 10% to about 75% of the web's thickness.
- 11. The method of claim 8 wherein the web comprises polymeric film.
- 12. The method of claim 8 wherein the polymeric film has apertures formed therein.
- 13. The method of claim 8 wherein the discontinuities comprise grooves.
- 14. The method of claim 8 wherein the abutting means comprises a cylindrical anvil.
- 15. The method of claim 8 wherein the lateral width of the discontinuities is about 0.5 mm to about 6 mm.
- 16. The method of claim 8 wherein the discontinuities are randomly spaced.
- 17. The method of claim 8 wherein the discontinuities are uniformly spaced.
- 18. The method of claim 8 wherein the width of the discontinuities vary.
- 19. The method of claim 8 wherein the width of the discontinuities is greater at the web contacting surface than the width of the discontinuities distal to the web contacting surface.
- 20. The method of claim 8 wherein the width of the discontinuities at the web contacting surface is substantially equal to the width of the discontinuities distal to the web contacting surface.
- 21. canceled.
- 22. canceled.
- 23. canceled.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This invention is related to the following copending applications: U.S. Ser. No._____, filed Jun.______, 1999, entitled “Tampon With Cover and Hydrophilic Additive” (Attorney Docket, PPC-708); U.S. Ser. No. ______, filed Jun.______, 1999, entitled “Multilayered Apertured Film Wrapping Element for Absorbent Articles” (Attorney Docket, PPC-691); U.S. Ser. No.______, filed Jun.______, 1999, entitled “Heterogeneous Apertured Film Wrapping Element for Absorbent Articles” (Attorney Docket, PPC-713); U.S. Ser. No.______, filed Jun.______, 1999, entitled “Domed Tampon with Surfactant-Treated Cover” (Attorney Docket, J&J-1810); U.S. Ser. No. ______, filed Jun.______, 1999, entitled “Sealing Roller and Sealing Roller Element, Particularly for Producing a Tampon for Feminine Hygiene and Method Therefore” (Attorney Docket, J&J-1819); and U.S. Ser. No. filed Jun.______, 1999, entitled “Tampon for Feminine Hygiene and Process and Apparatus for its Production” (Attorney Docket, J&J-1820).
Divisions (1)
|
Number |
Date |
Country |
Parent |
09343759 |
Jun 1999 |
US |
Child |
10827574 |
Apr 2004 |
US |