Cigarette wrapper with novel pattern

Patent metadata

Field	Value
Publication number	US-11064729-B2
Application number	US-201313896040-A
Country	US
Kind code	B2
Filing date	May 16, 2013
Priority date	May 16, 2012
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A wrapper for a smoking article has a base web and a plurality of crenellated bands, each having a diffusivity value in the range of 0 to about 0.2 cm/sec. The add-on material can be applied by gravure printing in a single pass in a chevron pattern such that an apex of the element is co-linear with substantially symmetrically spaced points on a trailing, outer edge of an adjacent chevron element. Testing elements may be simultaneously printed with the add-on material to monitor diffusivity and/or presence of add-on material.

First claim

We claim:

1. A wrapper for a smoking article, said wrapper comprising:
a base web having first and second side edges extending in a longitudinal direction and two ends extending in a transverse direction; and
an add-on material printed on said base web according to a pattern comprising a plurality of generally transverse, longitudinally spaced bands including respective leading edge portions and trailing edge portions, each band extending from the first side edge to the second side edge at an angle with respect to the transverse direction of the base web that is not perpendicular to the longitudinal direction of the base web, at least one of said leading edge portions or said trailing edge portions of the respective bands being crenellated, and opposite ends of the respective bands overlap at a seam when the wrapper is disposed about a column of shredded tobacco.

2. The wrapper of claim 1 , wherein both at least one of said leading edge portions and at least one of said trailing edge portions of the respective bands are crenellated.

3. The wrapper of claim 2 , wherein said at least one crenellated leading edge portions and trailing edge portions each include merlons and crenels of essentially a same transverse dimension.

4. The wrapper of claim 3 , wherein each merlon extends transversely in the range of about 4 mm, and extends in the range of about 3 mm in the longitudinal direction.

5. The wrapper of claim 1 , wherein the angle is less than about 5°.

6. The wrapper of claim 5 , wherein the angle is in the range of about 0.5° to about 5°.

7. The wrapper of claim 1 , wherein each of said at least one leading edge portions or each of said at least one trailing edge portions of the respective bands is crenellated, said crenellated leading or trailing edge portions of the respective bands including merlons and crenels of essentially a same transverse dimension, each merlon extending about 3 mm in the transverse direction and extending about 3 mm in the longitudinal direction.

8. The wrapper of claim 1 , wherein the add-on material includes an anti-wrinkling agent selected from the group consisting of propylene glycol; 1,2 propylene glycol; and glycerin.

9. The wrapper of claim 8 , wherein the add-on material includes calcium carbonate.

10. The wrapper of claim 9 , wherein a printing composition for forming the add-on material comprises in the ranges of about 20 to about 22 wt % starch, about 7 to about 9 wt % propylene glycol; about 10 to about 12 wt % calcium carbonate and a remainder substantially comprising water, all said ranges being with respect to a total weight of said printing composition.

11. The wrapper of claim 9 , wherein said bands are in a condition of said add-on material having been printed on the base web in a single pass application of a printing composition while being maintained by thermal conditioning at a predetermined viscosity and film-forming capability, said thermal conditioning comprises maintaining said printing composition at a temperature ranging from about 120° F. to about 150° F. until printing.

12. The wrapper of claim 11 , wherein said predetermined viscosity of the printing composition ranges from about 16.5 seconds to about 19.5 seconds as measured by a Zahn #2 cup at 120° F. at time of application.

13. The wrapper of claim 12 , wherein said predetermined film-forming capability comprises release of at least one of amylopectin and amylose from a starch in said printing composition.

14. The wrapper of claim 1 , wherein the base web has a permeability of greater than about 20 CORESTA in regions other than said bands.

15. The wrapper of claim 1 , wherein each band has a diffusivity in the range of 0 to about 0.2 cm/sec, a printing composition for forming said add-on material comprises an occluding component and an anti-wrinkling agent, and/or a printing composition for forming said add-on material is an aqueous solution.

16. The wrapper of claim 1 , wherein the leading edge portions and the trailing edge portions of each band is crenellated.

17. A smoking article comprising a tobacco rod having a wrapper, said wrapper comprising:
a base web having first and second side edges extending in a longitudinal direction and two ends extending in a transverse direction wherein the base web is disposed about a column of tobacco such that the first and second side edges of the base web overlap and form a seam; and
an add-on material printed on said base web according to a pattern comprising a plurality of generally transverse, longitudinally spaced circumferential bands including respective leading edge portions and trailing edge portions, each circumferential band extending from the first side edge to the second side edge at an angle with respect to the transverse direction of the base web that is not perpendicular to the longitudinal direction of the base web, at least one of said leading edge portions or said trailing edge portions of the respective circumferential bands being crenellated, and opposite ends of the respective circumferential bands overlap at the seam.

18. The smoking article of claim 17 , wherein both at least one of said leading edge portions and at least one of said trailing edge portions of the respective circumferential bands are crenellated.

19. The smoking article of claim 18 , wherein said at least one crenellated leading edge portions and trailing edge portions each include merlons and crenels of essentially a same transverse dimension.

20. The smoking article of claim 19 , wherein each merlon extends transversely in the range of about 4 mm, and extends in the range of about 3 mm in the longitudinal direction.

21. The smoking article of claim 17 , wherein the angle is less than about 5°.

22. The smoking article of claim 21 , wherein the angle is in the range of about 0.5° to about 5°.

23. The smoking article of claim 17 , wherein each of said at least one leading edge portions or each of said at least one trailing edge portions of the respective circumferential bands is crenellated, said crenellated leading or trailing edge portions of the respective circumferential bands including merlons and crenels of essentially a same transverse dimension, each merlon extending about 3 mm in the transverse direction and extending about 3 mm in the longitudinal direction.

24. The smoking article of claim 17 , wherein the add-on material includes an anti-wrinkling agent selected from the group consisting of propylene glycol; 1,2 propylene glycol; and glycerin.

25. The smoking article of claim 24 , wherein the add-on material includes calcium carbonate.

26. The smoking article of claim 25 , wherein a printing composition for forming the add-on material comprises in the ranges of about 20 to about 22 wt % starch, about 7 to about 9 wt % propylene glycol; about 10 to about 12 wt % calcium carbonate and a remainder substantially comprising water, all said ranges being with respect to a total weight of said printing composition.

27. The smoking article of claim 25 , wherein said circumferential bands are in a condition of said add-on material having been printed on the base web in a single pass application of a printing composition while being maintained by thermal conditioning at a predetermined viscosity and film-forming capability, said thermal conditioning comprises maintaining said printing composition at a temperature ranging from about 120° F. to about 150

Assignees

• Altria Client Services Llc

Inventors

• Rose Marc
• Sherwood Timothy S
• Smith Robert N

Classifications

• A24D1/025 Primary

  the covers having material applied to defined areas, e.g. bands for reducing the ignition propensity · CPC title