Cigarette wrapper with novel pattern

Patent metadata

Field	Value
Publication number	US-2023210165-A1
Application number	US-202318180319-A
Country	US
Kind code	A1
Filing date	Mar 8, 2023
Priority date	Dec 13, 2010
Publication date	Jul 6, 2023
Grant date	—

Abstract

A wrapper for a smoking article has a base web and a plurality of elements each having at least a pair of patch areas where diffusivity is in the range of 0 to about 0.2 cm/sec. Patches of adjacent elements are circumferentially offset from one another along the axis of a smoking article. 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 element. Testing elements may be simultaneously printed with the add-on material to monitor diffusivity and/or presence of add-on material.

First claim

1 . (canceled)

2 . A smoking article comprising:
a tobacco rod, the tobacco rod including,
a wrapper including a plurality of patch elements arranged in circumferentially extending, longitudinally spaced-apart, mutually offset rows, the patch elements of such number, size, and diffusivity value that the smoking article exhibits an IP performance of less than about 15%; and exhibits an average SE performance less than about 35°.

3 . A method of achieving ignition propensity performance in a smoking article together with statistically fewer self-extinguishments in such smoking articles, comprising:
establishing on a wrapper of the smoking article a plurality of patch elements arranged in circumferentially extending, longitudinally spaced-apart, mutually offset rows, the establishing step including establishing the patch elements at desired size and diffusivity value such that the smoking article exhibits an IP performance of less than 15%, and exhibits an average SE performance less than 35%.

4 . The method of claim 3 , wherein the diffusivity value is established in the range of 0 to 0.2 cm/sec.

5 . The method of claim 3 , further comprising:
forming the patches by single-pass printing of an aqueous solution containing starch, calcium carbonate, and an anti-wrinkling agent.

6 . The method of claim 5 , wherein the establishing further comprises applying the rows of patch elements to a base web according to a chevron form.

7 . A process of making wrapper for a smoking article comprising:
applying an add-on material on a base web in the form of a plurality of patch elements; and controlling diffusivity values in the patch elements to lie in the range of 0 to 0.2 cm/sec using an aqueous solution of starch, calcium carbonate, and an anti-wrinkling agent.

8 . The process of claim 7 , further comprising:
selecting the anti-wrinkling agent, the anti-wrinkling agent including propylene glycol, 1,2 propylene glycol, glycerin, or any combination thereof.

9 . The process of claim 7 , further comprising:
slitting the base web to form bobbins.

10 . The process of claim 7 , wherein the elements of patches are applied to the base web in a chevron pattern.

11 . The process of claim 10 , wherein the patch elements are applied to the base web in a chevron pattern such that an apex of a lagging chevron is essentially transverse of an outer edge portion of a leading chevron.

12 . The process of claim 10 , wherein the chevron pattern has an angle with respect to the transverse direction of the web, which angle lies in the range of 0.5° to 5°.

13 . A wrapper substantially free of creases and frayed edges, the wrapper in a condition of having been formed by:
printing an add-on material on a base web in the form of a plurality of elements of patches; and controlling diffusivity in the patches to lie in the range of 0 to 0.2 cm/sec using an aqueous solution of starch, calcium carbonate, and an anti-wrinkling agent, the aqueous solution in a condition of having been maintained at a temperature ranging from 120° F. to 140° F. prior to application.

14 . A method of conducting quality control in a manufacture of a wrapper comprising rows of occlusive elements, the method comprising:
printing a first pattern of the rows of occlusive elements in a first lane along a base web with an add-on material and a gravure roller having a cell geometry; and concurrently printing a second pattern of test elements in a second lane along the base web with the add-on material and the cell geometry; conducting on portions of the second pattern testing for diffusivity; and optionally testing for a presence of the first pattern; whereby at least one of a diffusivity value and a presence of the first pattern is monitored.

15 . The method of claim 14 , wherein each test element has sufficient size, geometry, or both size and geometry to facilitate measurement of diffusivity.

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

• A24C5/005

  Treatment of cigarette paper · CPC title