Follow us on Twitter
twitter icon@FreshPatents

Browse patents:
Next
Prev

Smoking article




Title: Smoking article.
Abstract: There is provided a smoking article, comprising: an inner rod of aerosol generating material; an inner wrapper, circumscribing the inner rod; and a combustible outer rod circumscribing the inner wrapper, wherein combustion of the outer rod is arranged to heat the inner rod to generate an aerosol for delivery through the inner rod. ...


Browse recent British American Tobacco (investments) Limited patents


USPTO Applicaton #: #20140076337
Inventors: Tom Woodman, Garrick Thorn


The Patent Description & Claims data below is from USPTO Patent Application 20140076337, Smoking article.

FIELD OF THE INVENTION

- Top of Page


The present invention relates to a smoking article, for example a Heat-Not-Burn (HNB) device.

BACKGROUND

- Top of Page


Heat-Not-Burn (HNB) devices which are sometimes also referred to as non-combustion type smoking articles are being developed as a possible alternative to conventional cigarettes. HNB technology generates an aerosol by heating rather than burning tobacco and/or other smoking materials. Examples of coaxial HNB cigarettes are known from US Publication No. US 2005/0066985 and U.S. Pat. No. 5,265,626.

A disadvantage of known HNB products, for example Premier™ and Eclipse™ introduced by RJ Reynolds Tobacco Company is that they do not provide a similar user experience to conventional tobacco burning cigarettes. For example, the above HNB products look, feel and taste different to conventional cigarettes.

SUMMARY

- Top of Page


According to the invention there is provided a smoking article, comprising: an inner rod of aerosol generating material; a inner wrapper, circumscribing the inner rod; and a combustible outer rod circumscribing the inner wrapper, wherein combustion of the outer rod is arranged to heat the inner rod to generate an aerosol for delivery through the inner rod.

Advantageously the aerosol is generated through heating but not burning the inner rod. In addition, combustion of the outer rod provides a visual indictor of consumption to the user.

Conveniently, the inner wrapper is substantially non-flammable. This can help prevent combustion of the inner rod.

The inner wrapper may be substantially non-permeable.

Preferably, the smoking article comprises a central low impedance path which is surrounded by a high impedance path.

Typically, the outer rod is of a higher density than the inner rod creating a pressure drop to control airflow through the inner rod.

Preferably, the smoking article further comprises a filter arranged to create a pressure drop by having portions of varying density in the filter to control airflow through the inner rod.

Optionally, airflow is restricted to flow through the inner rod only.

The inner wrapper may comprise bands, spaced along the length of the inner wrapper, wherein the bands are arranged to enable the inner rod to break and be disposed of along with ash from the outer rod.

The inner rod can have break portions, spaced along the length of the inner rod, the break portions becoming brittle when heated to enable the inner rod to break and be disposed of along with ash from the outer rod.

Typically, the aerosol generating material and/or the combustible material of the outer rod is tobacco or a tobacco substitute.

The aerosol generating material can include additives, including humectants, and may be substantially non-combustible. Advantageously, humectants may i) prevent or arrest combustion of the inner rod, ii) contribute to the flavour and sensory experience for the consumer, and iii) prevent the aerosol generating material from drying out.

The invention also includes a method of manufacturing a smoking article described above.

BRIEF DESCRIPTION OF THE DRAWINGS

- Top of Page


Embodiments of the present invention will now be described by way of illustrative example with reference to the accompanying drawings, in which:

FIG. 1a is a perspective view of a coaxial smoking article showing internal features of a body of the smoking article, including an inner rod and inner wrapper, in dashed lines.

FIG. 1b is transverse cross-sectional view of the body of coaxial smoking article of FIG. 1;

FIG. 2 is a longitudinal cross-sectional view of the coaxial smoking article of FIG. 1, showing an expanded view of a coaxial rod arrangement of the body;

FIG. 3a is the longitudinal cross-sectional view of FIG. 2, showing an expanded view of a filter arrangement for the smoking article;

FIG. 3b is the longitudinal cross-sectional view of FIG. 2, showing an expanded view of an alternative filter arrangement to that of FIG. 3a; and

FIG. 4 is a longitudinal cross-sectional view of the coaxial smoking article of FIG. 1, part way though consumption.

FIGS. 1a, 1b and 2 show a coaxial smoking article 1, referred to hereinafter as a cigarette, that has a body 2 and a filter 4. The body 2 of the cigarette is of coaxial construction and has an inner rod 6, an inner wrapper 8, an outer rod 10 and an outer wrapper 12.

DETAILED DESCRIPTION

- Top of Page


The inner rod 6 of the coaxial arrangement contains tobacco or a tobacco substitute. The inner rod 6 is heated during use to cause volatilisation of low boiling point components within the product, while avoiding pyrolysis or combustion of the tobacco or volatiles. This volatilisation leads to the creation of a vapour which is drawn through the cigarette 1 and is then condensed into an aerosol and inhaled by the consumer. The volatilised components include water, nicotine, humectants and light volatiles.

The inner rod 6 preferably contains a blend of tobacco or tobacco substitute which has been specifically formulated for the coaxial HNB cigarette although existing tobacco blends or tobacco substitutes may be used for the inner rod 6.

The tobacco blend of one embodiment may include additives which are included to enhance the sensorial attributes of the aerosol. For example, additives such as propylene glycol, glycerol or triacetin may be added to the tobacco blend.




← Previous       Next →
Advertise on FreshPatents.com - Rates & Info


You can also Monitor Keywords and Search for tracking patents relating to this Smoking article patent application.

###


Browse recent British American Tobacco (investments) Limited patents

Keyword Monitor How KEYWORD MONITOR works... a FREE service from FreshPatents
1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored.
3. Each week you receive an email with patent applications related to your keywords.  
Start now! - Receive info on patent apps like Smoking article or other areas of interest.
###


Previous Patent Application:
Ear insert for relief of tmj discomfort and headaches
Next Patent Application:
Smoking article and method of manufacturing a smoking article
Industry Class:
Tobacco
Thank you for viewing the Smoking article patent info.
- - -

Results in 0.13052 seconds


Other interesting Freshpatents.com categories:
Electronics: Semiconductor Audio Illumination Connectors Crypto

###

Data source: patent applications published in the public domain by the United States Patent and Trademark Office (USPTO). Information published here is for research/educational purposes only. FreshPatents is not affiliated with the USPTO, assignee companies, inventors, law firms or other assignees. Patent applications, documents and images may contain trademarks of the respective companies/authors. FreshPatents is not responsible for the accuracy, validity or otherwise contents of these public document patent application filings. When possible a complete PDF is provided, however, in some cases the presented document/images is an abstract or sampling of the full patent application for display purposes. FreshPatents.com Terms/Support
-g2-0.2857

66.232.115.224
Browse patents:
Next
Prev

stats Patent Info
Application #
US 20140076337 A1
Publish Date
03/20/2014
Document #
File Date
12/31/1969
USPTO Class
Other USPTO Classes
International Class
/
Drawings
0


Aerosol Smoking Combustion Wrapper

Follow us on Twitter
twitter icon@FreshPatents

British American Tobacco (investments) Limited


Browse recent British American Tobacco (investments) Limited patents



Tobacco   Cigar Or Cigarette Making  

Browse patents:
Next
Prev
20140320|20140076337|smoking article|There is provided a smoking article, comprising: an inner rod of aerosol generating material; an inner wrapper, circumscribing the inner rod; and a combustible outer rod circumscribing the inner wrapper, wherein combustion of the outer rod is arranged to heat the inner rod to generate an aerosol for delivery through |British-American-Tobacco-investments-Limited
';