Patent Application
20190150508
The present disclosure relates to an apparatus arranged to heat smokable material.
Articles such as cigarettes, cigars and the like burn tobacco during use to create tobacco smoke. Attempts have been made to provide alternatives to these articles, which burn tobacco, by creating products that release compounds without burning.
Examples of such products are so-called heat-not-burn products, also known as tobacco heating products or tobacco heating devices, which release compounds by heating, but not burning, the material. The material may be for example tobacco or other non-tobacco products or a combination, such as a blended mix, which may or may not contain nicotine.
According to a first aspect of the present disclosure, there is provided an apparatus arranged to heat smokable material to volatilize at least one component of said smokable material, the apparatus comprising: a housing, the housing having an insertion point at one end through which a consumable article comprising smokable material can be removably inserted into the apparatus in use, at least one heater arranged within the housing for heating said smokable material within the consumable article, wherein the housing comprises ventilation around the outside of said consumable article at the insertion point to enable at least one heated volatilized component from said smokable material to exit the apparatus and/or air to enter the apparatus.
In an exemplary embodiment the insertion point is formed in a collar, wherein the collar comprises a plurality of ridges arranged circumferentially around the insertion point that project into the insertion point.
Providing ventilation to the apparatus enables air to enter the apparatus to cool heated volatilized material from the smokable material and also enables some of the heated volatilized material to escape the apparatus without being inhaled by a user.
Embodiments of the disclosure will now be described, by way of example only, with reference to the accompanying drawings, in which:
As used herein, the term “smokable material” includes materials that provide volatilized components upon heating, typically in the form of an aerosol. “Smokable material” includes any tobacco-containing material and may, for example, include one or more of tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco or tobacco substitutes. “Smokable material” also may include other, non-tobacco, products, which, depending on the product, may or may not contain nicotine. “Smokable material” may for example be in the form of a solid, a liquid, a gel or a wax or the like. “Smokable material” may for example also be a combination or a blend of materials.
Apparatus is known that heats smokable material to volatilize at least one component of the smokable material, typically to form an aerosol which can be inhaled, without burning or combusting the smokable material. Such an apparatus is sometimes described as a “heat-not-burn” apparatus or a “tobacco heating product” or “tobacco heating device” or similar. Similarly, there are also so-called e-cigarette devices, which typically vaporize a smokable material in the form of a liquid, which may or may not contain nicotine. The smokable material may be in the form of or provided as part of a rod, cartridge or cassette or the like which can be inserted into the apparatus. A heater for heating and volatilizing the smokable material may be provided as a “permanent” part of the apparatus or may be provided as part of the smoking article or consumable which is discarded and replaced after use. A “smoking article” in this context is a device or article or other component that includes or contains in use the smokable material, which in use is heated to volatilize the smokable material, and optionally other components.
Referring initially to
A first end 3 is sometimes referred to herein as the mouth or proximal end 3 of the device 1 and a second end 5 is sometimes referred to herein as the distal end 5 of the device 1. The apparatus 1 has an on/off button 7 to allow the apparatus 1 as a whole to be switched on and off as desired by a user.
The apparatus 1 comprises a housing 9 for locating and protecting various internal components of the apparatus 1. In the example shown, the housing 9 comprises a uni-body sleeve 11 that encompasses the perimeter of the apparatus 1, capped with a top panel 17 which defines generally the ‘top’ of the apparatus 1 and a bottom panel 19 which defines generally the ‘bottom’ of the apparatus 1. In another example the housing comprises a front panel, a rear panel and a pair of opposite side panels in addition to the top panel 17 and the bottom panel 19.
The top panel 17 and/or the bottom panel 19 may be removably fixed to the uni-body sleeve 11, to permit easy access to the interior of the apparatus 1, or may be “permanently” fixed to the uni-body sleeve 11, for example to deter a user from accessing the interior of the apparatus 1. In an example, the panels 17 and 19 are made of a plastics material, including for example glass-filled nylon formed by injection molding, and the uni-body sleeve 11 is made of aluminum, though other materials and other manufacturing processes may be used.
The top panel 17 of the apparatus 1 has an opening 20 at the mouth end 3 of the apparatus 1 through which, in use, a consumable article 21 containing smokable material may be inserted into the apparatus 1 and removed from the apparatus 1 by a user.
The housing 9 has located or fixed therein a heater arrangement 23, control circuitry 25 and a power source 27. In this example, the heater arrangement 23, the control circuitry 25 and the power source 27 are laterally adjacent (that is, adjacent when viewed from an end), with the control circuitry 25 being located generally between the heater arrangement 23 and the power source 27, though other locations are possible.
The control circuitry 25 may include a controller, such as a microprocessor arrangement, configured and arranged to control the heating of the smokable material in the consumable article 21 as discussed further below.
The power source 27 may be for example a battery, which may be a rechargeable battery or a non-rechargeable battery. Examples of suitable batteries include for example a lithium-ion battery, a nickel battery (such as a nickel-cadmium battery), an alkaline battery and/or the like. The battery 27 is electrically coupled to the heater arrangement 23 to supply electrical power when required and under control of the control circuitry 25 to heat the smokable material in the consumable (as discussed, to volatilize the smokable material without causing the smokable material to burn).
An advantage of locating the power source 27 laterally adjacent to the heater arrangement 23 is that a physically large power source 25 may be used without causing the apparatus 1 as a whole to be unduly lengthy. As will be understood, in general a physically large power source 25 has a higher capacity (that is, the total electrical energy that can be supplied, often measured in Amp-hours or the like) and thus the battery life for the apparatus 1 can be longer.
In one example, the heater arrangement 23 is generally in the form of a hollow cylindrical tube, having a hollow interior heating chamber 29 into which the consumable article 21 comprising the smokable material is inserted for heating in use. Different arrangements for the heater arrangement 23 are possible. For example, the heater arrangement 23 may comprise a single heating element or may be formed of plural heating elements aligned along the longitudinal axis of the heater arrangement 23. The or each heating element may be annular or tubular, or at least part-annular or part-tubular around its circumference. In an example, the or each heating element may be a thin film heater. In another example, the or each heating element may be made of a ceramics material. Examples of suitable ceramics materials include alumina and aluminum nitride and silicon nitride ceramics, which may be laminated and sintered. Other heating arrangements are possible, including for example inductive heating, infrared heater elements, which heat by emitting infrared radiation, or resistive heating elements formed by for example a resistive electrical winding.
In one particular example, the heater arrangement 23 is supported by a stainless steel support tube and comprises a polyimide heating element. The heater arrangement 23 is dimensioned so that substantially the whole of the smokable material when the consumable article 21 is inserted in the apparatus 1 so that substantially the whole of the smokable material is heated in use.
The or each heating element may be arranged so that selected zones of the smokable material can be independently heated, for example in turn (over time) or together (simultaneously) as desired.
The heater arrangement 23 in this example is surrounded along at least part of its length by a thermal insulator 31. The insulator 31 helps to reduce heat passing from the heater arrangement 23 to the exterior of the apparatus 1. This helps to keep down the power requirements for the heater arrangement 23 as it reduces heat losses generally. The insulator 31 also helps to keep the exterior of the apparatus 1 cool during operation of the heater arrangement 23. In one example, the insulator 31 may be a double-walled sleeve which provides a low pressure region between the two walls of the sleeve. That is, the insulator 31 may be for example a “vacuum” tube, i.e. a tube that has been at least partially evacuated so as to minimize heat transfer by conduction and/or convection. Other arrangements for the insulator 31 are possible, including using heat insulating materials, including for example a suitable foam-type material, in addition to or instead of a double-walled sleeve.
The housing 9 may further comprises various internal support structures 37 (best seen in
The apparatus 1 further comprises a collar 33 which extends around and projects from the opening 20 into the interior of the housing 9 and a generally tubular chamber 35 which is located between the collar 33 and one end of the vacuum sleeve 31.
One end of the chamber 35 connects to and is supported by the collar 33 and the other end of the chamber 35 connects to the one end of the vacuum sleeve 31 and hence supports the vacuum sleeve 31. Accordingly, as best seen in
As mentioned above, in this example, the heater arrangement 23 is generally in the form of a hollow cylindrical tube and this tube is in fluid communication with the opening at the mouth end 3 of the device 1 via the chamber 35 and the collar 33.
Referring now to
The chamber 35 further comprises a cooling structure 35f, which in this example, comprises a plurality of cooling fins 35f spaced apart along the body 35a, each of which is arranged circumferentially around the body 35a.
The chamber 35 also comprises a flange portion 35g around the second open end 35c and a plurality of projections or clips 35h also arranged around the second open end 35c. Each clip 35h is generally ‘L’ shaped and comprises a first portion 35h1 that is joined to the flange portion 35g and a second portion 35h2 that is generally perpendicular to first portion 35h1 and which extends in a direction generally parallel to the longitudinal axis of the tubular body 35a. Each second portion 35h2 comprises a stepped surface 35i that faces towards an axis that extends along the longitudinal axis of the tubular body 35a and which stepped surface 35i is slightly curved.
As best seen in
As is best appreciated from
As best seen in
In an alternative example shown in
In a further example a combination of the lobes 35j and the oval gripping section 35k could be used to retain the consumable article 21 in the hollow chamber 35. For example, an oval gripping section 35k and the arrangement of lobes 35j could be spaced apart longitudinally in the hollow chamber 35 and act separately to retain an inserted consumable article 21 in place, or, the lobes 35j could be arranged around the surface of the oval gripping section 35k.
The chamber 35 may be formed of for example a plastics material, including for example polyether ether ketone (PEEK).
Referring again to
The apparatus 1 may further comprise a door 39 at the distal end 5 that opens and closes an opening in the rear panel to provide access to the heating chamber 29 so that the heating chamber can be cleaned. Examples of suitable doors are also discussed in more detail in the aforementioned co-pending U.S. Provisional Patent App. No. 62/185,227.
Referring now to
The collar 33 extends around and projects from the opening 20 into the interior of the housing 9. In one example, the collar 33 is integral with the top panel 17 of the housing so the collar 33 and the top panel 17 form a single piece. In an alternative example, the collar 33 is a distinct element from the top panel 17, but can be attached to the top panel 17 through an attachment, such as a locking mechanism, adhesive, screws. Other attachments that are suitable for attaching the collar 33 to the top panel 17 may be used.
In this example, the collar 33 comprises a plurality of ridges 60 arranged circumferentially around the periphery of the opening 20 and which project into the opening 20. The ridges 60 take up space within the opening 20 such that the open span of the opening 20 at the locations of the ridges 60 is less than the open span of the opening 20 at the locations without the ridges 60. The ridges 60 are configured to engage with a consumable article 21 inserted into the apparatus to assist in securing it within the apparatus 1.
In one example, the ridges 60 are circumferentially equally spaced around the periphery of the opening 20. In one example, there are four ridges 60, in other examples there may be more or fewer than four ridges 60.
As mentioned above, the ridges 60 project radially into the opening 20 but, as best appreciated from
Referring again particularly to
In operation, the heater arrangement 23 will heat the consumable article 21 to volatilize at least one component of the smokable material 21a.
The primary flow path for the heated volatilized components from the smokable material 21a is axially through the consumable article 21, through the space 21d, the filter/cooling element 21c and the further space 21e before entering a user's mouth through the open end of the mouthpiece assembly 21b. However, some of the volatilized components may escape from the consumable article 21 through its permeable outer wrapper and into the space 36 surrounding the consumable article 21 in the chamber 35. It would be undesirable for the volatilized components that flow from the consumable article 21 into the chamber 35 to be inhaled by the user, because these components would not pass through the filter/cooling element 21c and thus be unfiltered and not cooled.
Advantageously, the volume of air surrounding the consumable article 21 in the chamber 35 and the fin-cooled interior wall of the chamber 35 causes at least some of the volatilized components that escape the consumable article 21 through its outer layer to cool and condense on the interior wall of the chamber 35 preventing those volatilized components from being possibly inhaled by a user.
This cooling effect may be assisted by cool air that is able to enter from outside the apparatus 1 into the space 36 surrounding the consumable article 21 in the chamber 35 via the ventilation paths 61, which allows fluid to flow into and out of the apparatus. A ventilation path 61 will be defined between a pair of the plurality of neighboring ridges 60 to provide ventilation around the outside of the consumable article 21 at the insertion point.
In one example, a second ventilation path 61 is provided between a second pair of neighboring ridges for at least one heated volatilized components to flow from the consumable article 21 at a second location. Therefore ventilation is provided around the outside of the consumable article 21 at the insertion point by the first and second ventilation paths 61.
Furthermore, heated volatilized components that escape the consumable article 21 through its outer wrapper do not condense on the internal wall of the chamber 35 and are able to flow safely out of the apparatus 1 via the ventilation paths 61 without being inhaled by a user.
The chamber 35 and the ventilation both aid in reducing the temperature and the content of water vapor composition released in heated volatilized components from the smokable material.
The various embodiments described herein are presented only to assist in understanding and teaching the claimed features. These embodiments are provided as a representative sample of embodiments only, and are not exhaustive and/or exclusive. It is to be understood that advantages, embodiments, examples, functions, features, structures, and/or other aspects described herein are not to be considered limitations on the scope of the invention as defined by the claims or limitations on equivalents to the claims, and that other embodiments may be utilized and modifications may be made without departing from the scope of the claimed invention. Various embodiments of the invention may suitably comprise, consist of, or consist essentially of, appropriate combinations of the disclosed elements, components, features, parts, steps, means, etc., other than those specifically described herein. In addition, this disclosure may include other inventions not presently claimed, but which may be claimed in future.
The present application is a National Phase entry of PCT Application No. PCT/EP2017/061520, filed May 12, 1017, which claims priority from U.S. Provisional Application No. 62/336,205, filed May 13, 2016, each of which is hereby fully incorporated herein by reference.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2017/061520 | 5/12/2017 | WO | 00 |
| Number | Date | Country | |
|---|---|---|---|
| 62336205 | May 2016 | US |
