Tobacco Smoke Filter and Methods of Making the Same

Inactive Publication Date: 2010-06-17
BRITISH AMERICAN TOBACCO (INVESTMENTS) LTD
View PDF3 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]In accordance with the present invention, there is provided a smoke filter for a tobacco product comprising an axially extending filter section defining a path along which, in use, smoke passes through filtration material, wherein the path ext

Problems solved by technology

One challenge faced with the addition of granular or particulate material to the filter filaments is how to adhere the individual particles in such a way that they remain active.
One solution has been to

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Tobacco Smoke Filter and Methods of Making the Same
  • Tobacco Smoke Filter and Methods of Making the Same
  • Tobacco Smoke Filter and Methods of Making the Same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0065 Filter Manufacture

[0066]Activated carbon is moulded into a helical shape approximately 6 mm in diameter. An average pitch and low porosity, i.e., low permeability, are used. The carbon is cut into lengths of approximately 20 mm. Units of standard cellulose acetate tow approximately 6 mm in diameter and approximately 10 mm long are provided and arranged in alternating fashion with lengths of carbon helix.

[0067]The intra helical space of the carbon helix is provided with a mixture of flavourant and adsorbent before the length of helix / cellulose acetate tow is wrapped with an approximately 0.5 mm thick layer of cellulose acetate about its circumference. Plug wrap may optionally be provided around the cellulose acetate layer as known in the art.

[0068]This provides a length of filter material which may be cut along the middle of the approximately 10 mm lengths of cellulose acetate tow to provide a plurality of filter units each approximately 30 mm in length and each comprising an a...

example 2

[0070 Cigarette Manufacture

[0071]A resin commonly used in tobacco smoke filters is extruded through a die to produce a tight helical shape approximately 7 mm in diameter and 10 meters long. The shape is fed into a machine which applies suction or vacuum, for example a suction garniture, to pack fibres of cellulose acetate around the helix. The packed helix is wrapped in plug wrap and cured on a drying garniture. The cured filter is cut to 60 mm lengths which are provided to a cigarette making machine.

[0072]The cigarette making machine uses the filter to produce cigarettes according to known methods. In brief, two tobacco rods are positioned at either end of the filter and, once secured, the filter is cut at the middle. An optional end segment, for example, a pad of cellulose acetate, is added at the mouth end of the cigarette to mask the helical core unit. The resultant product is a cigarette incorporating a novel tobacco smoke filter according to the invention.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A tobacco smoke filter (10) can comprise a spiral core (11) of impermeable or semi-permeable material. A filter spiral core (11) is surrounded by filter material (12) such as cellulose acetate and wrapped in paper (13).

Description

FIELD OF THE INVENTION[0001]The invention relates generally to devices for filtration of tobacco smoke, their manufacture and use. More specifically, the invention relates to filters suitable for use in smoking devices.BACKGROUND OF THE INVENTION[0002]Single-use, disposable filters have been incorporated in smoking products for decades. Filters are commonly made of cellulose acetate, relying on a process whereby cellulose acetate is dissolved in a solvent such as acetone, and polymer filaments are spun out of the solution. The filaments are lubricated and bundled, then crimped and dried. Alternative filter materials include polypropylene and cellulose. Filters may be segmented, potentially with different materials in different segments; they may incorporate granular additives such as carbon.[0003]The filter is located at one end of the tobacco rod so that smoke from the burning tobacco rod, which comprises a particle phase and a vapour phase, passes through the filter before being i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): A24D3/06A24D3/04
CPCA24D3/045A24D3/0225A24D3/0245
Inventor FALLON, GARY
Owner BRITISH AMERICAN TOBACCO (INVESTMENTS) LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap