Smoking article with modified smoke delivery

a technology of modified smoke and smoking articles, applied in the direction of tobacco, non-fibrous pulp addition, applications, etc., to achieve the effect of reducing weight and reducing weight of tobacco per unit length

Inactive Publication Date: 2010-11-04
BRITISH AMERICAN TOBACCO (INVESTMENTS) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0018]The method may comprise: trimming tobacco from the outside of the rod of tobacco over an area where the patch is to be disposed, thereby creating a reduced weight of tobacco per unit length; and disposing the patch over the rod of tobacco so that the patch covers the area from which tobacco has been trimmed. Alternativ

Problems solved by technology

However, the structure of the tobacco rod also plays a part in the delivery of smoke to

Method used

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  • Smoking article with modified smoke delivery
  • Smoking article with modified smoke delivery
  • Smoking article with modified smoke delivery

Examples

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Embodiment Construction

[0028]The present invention aims to provide a smoking article such as a cigarette that delivers smoke to the smoker with improved efficiency for a first portion of the smoking article, and also generates less smoke than a conventional smoking article from all or part of the remainder of the smoking article. To address this, a patch of material that allows a more free passage of smoke therethrough than does the tobacco of the smoking article is positioned under part of the outer wrapping paper of the smoking article.

[0029]FIG. 1 shows a longitudinal cross-sectional view through a smoking article according to an embodiment of the invention. The smoking article 10 comprises, in the conventional manner, a cylinder or rod of tobacco 12 that is encircled or encased in a paper wrapper 14 (cigarette paper) that forms a tube around the tobacco 14. The smoking article has a first end A that is intended to be lit, and a second end B that is received in the mouth of the smoker. Again convention...

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Abstract

A smoking article (10) comprises a tobacco rod (12) wrapped with a paper wrapper (14), and a patch (16) of material between the tobacco rod and the paper wrapper that extends along the tobacco rod from or near the mouth end (B) to an intermediate point along the rod. The patch has a structure such that it provides a path for smoke from tobacco upstream of the patch to the mouth end that has less resistance to smoke flow than a path through the tobacco under the patch, thus delivering smoke from the upstream part of the tobacco rod to the smoker more efficiently. The patch may also increase the static burn rate of the latter part of the smoking article.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to a smoking article with modified smoke delivery.[0002]Smoking articles such as cigarettes comprise a rod of smokable material such as tobacco which is tightly wrapped in a paper wrapper (cigarette paper). A filter unit comprising one or more filter components may be joined to the wrapped tobacco rod using a tipping paper. For a uniform composition of tobacco rod, the smoke that is delivered through the tobacco rod from the burning tobacco, for any given puffing regime, is determined by three main factors: the amount of air drawn in through the coal during puffing (which depends upon the level of ventilation through the cigarette paper); the filtration of the smoke through the remaining unburnt part of the tobacco rod; and the speed of burn of the tobacco rod between puffs (smoulder rate). The smoke delivery from any single puff thus depends on the length of tobacco rod remaining, and for a standard puff volume taken fr...

Claims

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Application Information

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IPC IPC(8): A24C1/26A24D1/02
CPCA24D1/027A24D1/02
Inventor FIEBELKORN, RICHARD
Owner BRITISH AMERICAN TOBACCO (INVESTMENTS) LTD
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