Patent Application
20150128968
The present disclosure relates to aerosol delivery devices such as smoking articles, and more particularly to wrapped mouthpiece constructions useful in such devices. An electrically resistive heater may be configured to heat a material, which may be made or derived from tobacco or otherwise incorporate tobacco, to form an inhalable substance for human consumption.
Many smoking devices have been proposed through the years as improvements upon, or alternatives to, smoking products that require combusting tobacco for use. Many of those devices purportedly have been designed to provide the sensations associated with cigarette, cigar, or pipe smoking, but without delivering considerable quantities of incomplete combustion and pyrolysis products that result from the burning of tobacco. To this end, there have been proposed numerous smoking products, flavor generators, and medicinal inhalers that utilize electrical energy to vaporize or heat a volatile material, or attempt to provide the sensations of cigarette, cigar, or pipe smoking without burning tobacco to a significant degree. See, for example, the various alternative smoking articles, aerosol delivery devices and heat generating sources set forth in the background art described in U.S. Pat. No. 7,726,320 to Robinson et al., U.S. Pat. App. Pub. No. 2013-0255702, U.S. patent application Ser. No. 13/536,438 to Sebastian et al., filed Jun. 28, 2012, U.S. patent application Ser. No. 13/602,871 to Collett et al., filed Sep. 4, 2012, and U.S. patent application Ser. No. 13/647,000 to Sears et al., filed Oct. 8, 2012, which are incorporated herein by reference.
Certain tobacco products that have employed electrical energy to produce heat for smoke or aerosol formation, and in particular, certain products that have been referred to as electronic cigarette products, have been commercially available throughout the world. Representative products that resemble many of the attributes of traditional types of cigarettes, cigars or pipes have been marketed as ACCORD® by Philip Morris Incorporated; ALPHA™, JOYE 510™ and M4™ by InnoVapor LLC; CIRRUS™ and FLING™ by White Cloud Cigarettes; COHITA™, COLIBRI™, ELITE CLASSIC™, MAGNUM™, PHANTOM™ and SENSE™ by Epuffer® International Inc.; DUOPRO™, STORM™ and VAPORKING® by Electronic Cigarettes, Inc.; EGAR™ by Egar Australia; eGo-C™ and eGo-T™ by Joyetech; ELUSION™ by Elusion UK Ltd; EONSMOKE® by Eonsmoke LLC; GREEN SMOKE® by Green Smoke Inc. USA; GREENARETTE™ by Greenarette LLC; HALLIGAN™, HENDU™, JET™, MAXXQ™, PINK™ and PITBULL™ by Smoke Stik®; HEATBAR™ by Philip Morris International, Inc.; HYDRO IMPERIAL™ and LXE™ from Crown7; LOGIC™ and THE CUBAN™ by LOGIC Technology; LUCI® by Luciano Smokes Inc.; METRO® by Nicotek, LLC; NJOY® and ONEJOY™ by Sottera, Inc.; NO. 7™ by SS Choice LLC; PREMIUM ELECTRONIC CIGARETTE™ by PremiumEstore LLC; RAPP E-MYSTICK™ by Ruyan America, Inc.; RED DRAGON™ by Red Dragon Products, LLC; RUYAN® by Ruyan Group (Holdings) Ltd.; SMART SMOKER® by The Smart Smoking Electronic Cigarette Company Ltd.; SMOKE ASSIST® by Coastline Products LLC; SMOKING EVERYWHERE® by Smoking Everywhere, Inc.; V2CIGS™ by VMR Products LLC; VAPOR NINE™ by VaporNine LLC; VAPOR4LIFE® by Vapor 4 Life, Inc.; VEPPO™ by E-CigaretteDirect, LLC and VUSE® by R. J. Reynolds Vapor Company. Yet other electrically powered aerosol delivery devices, and in particular those devices that have been characterized as so-called electronic cigarettes, have been marketed under the tradenames BLU™, COOLER VISIONS™; DIRECT E-CIG™; DRAGONFLY™; EMIST™; EVERSMOKE™; GAMUCCI®; HYBRID FLAME™; KNIGHT STICKS™; ROYAL BLUES™; SMOKETIP® and SOUTH BEACH SMOKE™.
It may be desirable to provide a smoking article that employs heat produced by electrical energy to provide sensations of smoking a cigar, cigarette, or pipe, but without combusting tobacco to any significant degree, without need for a combustion heat source, and without necessarily delivering considerable quantities of incomplete combustion and/or pyrolysis products. Furthermore, it may be desirable for such a smoking article to include a comfortable mouthpiece that is similar to mouthpieces and/or the sensory profile aspects associated with existing smoking articles such as, for examples, cigars, cigarettes, or pipes. In other aspects, it may be desirable to provide such a smoking with a mouthpiece that provides a solid rigid main body surrounded by coating material that provides a user with a comfortable sensory experience during contact with the user's mouth (e.g., lips, teeth, and/or tongue) and that also provides a visible display of indicia such as, for example, product identification, advertising, labeling, or other visual indicia. It may further be desirable to provide a rigid-bodied smoking article that includes a mouthpiece providing comfortable mouth-feel characterized by smokers as “bite” or “bite sensation,” where the mouthpiece can effectively display information about the smoking article.
The present disclosure relates to wrapping materials and other constructions for a mouthpiece component or portion of a smoking article or other aerosol delivery device configured to produce aerosol. In certain embodiments, a rigid tube body may form part of a mouthpiece for a smoking article, with a tipping cover that encircles an outer circumference along a length of the mouthpiece, where the tipping cover includes a polymeric label in a form selected from a seamless tube, a seamed tube, an overmold, or any combination thereof, which may overly a tipping wrap. In certain embodiments, a rigid tube body may form part of a mouthpiece for a smoking article, with a tipping wrap that encircles an outer circumference along a length of the mouthpiece to form at least a double layer that includes more flexibility and/or less resistance to permanent indentation than the rigid tube.
Various embodiments are described below with reference to the drawings. The relationship and functioning of the various elements of the embodiments may better be understood by reference to the following detailed description. However, embodiments are not limited to those illustrated in the drawings. It should be understood that the drawings are not necessarily to scale, and in certain instances details may have been omitted that are not necessary for an understanding of embodiments disclosed herein, such as—for example—conventional fabrication and assembly. The term “smoking article” is used herein as a matter of convention, although many embodiments may not actually burn tobacco or generate any combustion-based aerosol (in the form of smoke or otherwise); rather, the terms “smoking” and/or “vaping” are used to refer to drawing an aerosol into a user's mouth for purpose of experiencing flavor(s) and/or other sensation(s) associated with aerosol components.
The invention is defined by the claims, may be embodied in many different forms, and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey enabling disclosure to those skilled in the art. As used in this specification and the claims, the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Reference to “dry weight percent” or “dry weight basis” refers to weight on the basis of dry ingredients (i.e., all ingredients except water).
The present disclosure provides descriptions of mechanisms, components, features, and methods configured to dynamically change a visual characteristic in response to feedback. While the mechanisms are generally described herein in terms of embodiments associated with aerosol delivery devices such as so-called “e-cigarettes,” it should be understood that the mechanisms, components, features, and methods may be embodied in many different forms and associated with a variety of articles. For example, the description provided herein may be employed in conjunction with embodiments of traditional smoking articles (e.g., cigarettes, cigars, pipes, etc.), heat-not-burn cigarettes, and related packaging for any of the products disclosed herein. Accordingly, it should be understood that the description of the mechanisms, components, features, and methods configured to provide for illumination disclosed herein are discussed in terms of embodiments relating to aerosol delivery mechanisms by way of example only, and may be embodied and used in various other products and methods.
In this regard, the present disclosure provides descriptions of aerosol delivery devices that use electrical energy to heat a material (preferably without combusting the material to any significant degree) to form an inhalable substance; such articles most preferably being sufficiently compact to be considered “hand-held” devices. An aerosol delivery device may provide some or all of the sensations (e.g., inhalation and exhalation rituals, types of tastes or flavors, organoleptic effects, physical feel, use rituals, visual cues such as those provided by visible aerosol, and the like) of smoking a cigarette, cigar, or pipe, without any substantial degree of combustion of any component of that article or device. The aerosol delivery device may not produce smoke in the sense of the aerosol resulting from by-products of combustion or pyrolysis of tobacco, but rather, that the article or device may yield vapors (including vapors within aerosols that can be considered to be visible aerosols that might be considered to be described as smoke-like) resulting from volatilization or vaporization of certain components of the article or device. In highly preferred embodiments, aerosol delivery devices may incorporate tobacco and/or components derived from tobacco.
Aerosol delivery devices of the present disclosure also can be characterized as being vapor-producing articles or medicament delivery articles. Thus, such articles or devices can be adapted so as to provide one or more substances (e.g., flavors and/or pharmaceutical active ingredients) in an inhalable form or state. For example, inhalable substances can be substantially in the form of a vapor (i.e., a substance that is in the gas phase at a temperature lower than its critical point). Alternatively, inhalable substances can be in the form of an aerosol (i.e., a suspension of fine solid particles or liquid droplets in a gas). For purposes of simplicity, the term “aerosol” as used herein is meant to include vapors, gases and aerosols of a form or type suitable for human inhalation, whether or not visible, and whether or not of a form that might be considered to be smoke-like.
In use, aerosol delivery devices of the present disclosure may be subjected to many of the physical actions employed by an individual in using a traditional type of smoking article (e.g., a cigarette, cigar or pipe that is employed by lighting and inhaling tobacco). For example, the user of an aerosol delivery device of the present disclosure can hold that article much like a traditional type of smoking article, draw on one end of that article for inhalation of aerosol produced by that article, take puffs at selected intervals of time, etc.
Aerosol delivery devices of the present disclosure generally include a number of components provided within an outer body or shell. The overall design of the outer body or shell can vary, and the format or configuration of the outer body that can define the overall size and shape of the aerosol delivery device can vary. Typically, an elongated body resembling the shape of a cigarette or cigar can be a formed from a single, unitary shell; or the elongated body can be formed of two or more separable pieces. For example, an aerosol delivery device can comprise an elongated shell or body that can be substantially tubular in shape and, as such, resemble the shape of a conventional cigarette or cigar. In one embodiment, all of the components of the aerosol delivery device are contained within one outer body or shell. Alternatively, an aerosol delivery device can comprise two or more shells that are joined and are separable. For example, an aerosol delivery device can possess at one end a control body comprising an outer body or shell containing one or more reusable components (e.g., a rechargeable battery and various electronics for controlling the operation of that article), and at the other end and removably attached thereto an outer body or shell containing a disposable portion (e.g., a disposable flavor-containing cartridge). More specific formats, configurations and arrangements of components within the single shell type of unit or within a multi-piece separable shell type of unit will be evident in light of the further disclosure provided herein. Additionally, various aerosol delivery device designs and component arrangements can be appreciated upon consideration of the commercially available electronic aerosol delivery devices, such as those representative products listed in the background art section of the present disclosure.
Aerosol delivery devices of the present disclosure most preferably comprise some combination of a power source (i.e., an electrical power source), at least one control component (e.g., means for actuating, controlling, regulating and ceasing power for heat generation, such as by controlling electrical current flow the power source to other components of the article), a heater or heat generation component (e.g., an electrical resistance heating element or component commonly referred to as an “atomizer”), and an aerosol precursor composition (e.g., commonly a liquid capable of yielding an aerosol upon application of sufficient heat, such as ingredients commonly referred to as “smoke juice,” “e-liquid” and “e-juice”), and a mouthend region or tip for allowing draw upon the aerosol delivery device for aerosol inhalation (e.g., a defined air flow path through the article such that aerosol generated can be withdrawn therefrom upon draw). Exemplary formulations for aerosol precursor materials that may be used according to the present disclosure are described in U.S. Pat. Pub. No. 2013/0008457 to Zheng et al., the disclosure of which is incorporated herein by reference in its entirety.
Alignment of the components within the aerosol delivery device can vary. In specific embodiments, the aerosol precursor composition can be located near an end of the article (e.g., within a cartridge, which in certain circumstances can be replaceable and disposable), which may be proximal to the mouth of a user so as to maximize aerosol delivery to the user. Other configurations, however, are not excluded. Generally, the heating element can be positioned sufficiently near the aerosol precursor composition so that heat from the heating element can volatilize the aerosol precursor (as well as one or more flavorants, medicaments, or the like that may likewise be provided for delivery to a user) and form an aerosol for delivery to the user. When the heating element heats the aerosol precursor composition, an aerosol is formed, released, or generated in a physical form suitable for inhalation by a consumer. It should be noted that the foregoing terms are meant to be interchangeable such that reference to release, releasing, releases, or released includes form or generate, forming or generating, forms or generates, and formed or generated. Specifically, an inhalable substance is released in the form of a vapor or aerosol or mixture thereof. Additionally, the selection of various aerosol delivery device components can be appreciated upon consideration of the commercially available electronic aerosol delivery devices, such as those representative products listed in the background art section of the present disclosure.
An aerosol delivery device incorporates a battery or other electrical power source to provide current flow sufficient to provide various functionalities to the article, such as resistive heating, powering of control systems, powering of indicators, and the like. The power source can take on various embodiments. Preferably, the power source is able to deliver sufficient power to rapidly heat the heating member to provide for aerosol formation and power the article through use for the desired duration of time. The power source preferably is sized to fit conveniently within the aerosol delivery device so that the aerosol delivery device can be easily handled; and additionally, a preferred power source is of a sufficiently light weight to not detract from a desirable smoking experience.
One example embodiment of an aerosol delivery device 100 is provided in
In specific embodiments, one or both of the control body 102 and the cartridge 104 may be referred to as being disposable or as being reusable. For example, the control body may have a replaceable battery or a rechargeable battery and thus may be combined with any type of recharging technology, including connection to a typical electrical outlet, connection to a car charger (i.e., cigarette lighter receptacle), and connection to a computer, such as through a universal Ser. bus (USB) cable. For example, an adaptor including a USB connector at one end and a control body connector at an opposing end is disclosed in U.S. patent application Ser. No. 13/840,264, filed Mar. 15, 2013, which is incorporated herein by reference in its entirety. Further, in some embodiments the cartridge may comprise a single-use cartridge, as disclosed in U.S. patent application Ser. No. 13/603,612, filed Sep. 5, 2012, which is incorporated herein by reference in its entirety.
In the exemplified embodiment, the control body 102 includes a control component 106, a flow sensor 108, and a battery 110, which can be variably aligned, and can include a plurality of indicators 112 at a distal end 114 of an outer body 116. The indicators 112 can be provided in varying numbers and can take on different shapes and can even be an opening in the body (such as for release of sound when such indicators are present).
An air intake 118 may be positioned in the outer body 116 of the control body 102. A coupler 120 also is included at the proximal attachment end 122 of the control body 102 and may extend into a control body projection 124 to allow for ease of electrical connection with an atomizer or a component thereof, such as a resistive heating element (described below) when the cartridge 104 is attached to the control body. Although the air intake 118 is illustrated as being provided in the outer body 116, in another embodiment the air intake may be provided in a coupler as described, for example, in U.S. patent application Ser. No. 13/841,233; Filed Mar. 15, 2013.
The cartridge 104 includes an outer body 126 with a mouth opening 128 at a mouthend 130 thereof to allow passage of air and entrained vapor (i.e., the components of the aerosol precursor composition in an inhalable form) from the cartridge to a consumer during draw on the aerosol delivery device 100. The aerosol delivery device 100 may be substantially rod-like or substantially tubular shaped or substantially cylindrically shaped in some embodiments.
The cartridge 104 further includes an atomizer 132 comprising a resistive heating element 134 (e.g., a wire coil) configured to produce heat and a liquid transport element 136 (e.g., a wick) configured to transport a liquid. Various embodiments of materials configured to produce heat when electrical current is applied therethrough may be employed to form the resistive heating element 134. Example materials from which the wire coil may be formed include Kanthal (FeCrAl), Nichrome, Molybdenum disilicide (MoSi2), molybdenum silicide (MoSi), Molybdenum disilicide doped with Aluminum (Mo(Si,Al)2), and ceramic (e.g., a positive temperature coefficient ceramic). Further to the above, representative heating elements and materials for use therein are described in U.S. Pat. No. 5,060,671 to Counts et al.; U.S. Pat. No. 5,093,894 to Deevi et al.; U.S. Pat. No. 5,224,498 to Deevi et al.; U.S. Pat. No. 5,228,460 to Sprinkel Jr., et al.; U.S. Pat. No. 5,322,075 to Deevi et al.; U.S. Pat. No. 5,353,813 to Deevi et al.; U.S. Pat. No. 5,468,936 to Deevi et al.; U.S. Pat. No. 5,498,850 to Das; U.S. Pat. No. 5,659,656 to Das; U.S. Pat. No. 5,498,855 to Deevi et al.; U.S. Pat. No. 5,530,225 to Hajaligol; U.S. Pat. No. 5,665,262 to Hajaligol; U.S. Pat. No. 5,573,692 to Das et al.; and U.S. Pat. No. 5,591,368 to Fleischhauer et al., the disclosures of which are incorporated herein by reference in their entireties.
Electrically conductive heater terminals 138 (e.g., positive and negative terminals) at the opposing ends of the heating element 134 are configured to direct current flow through the heating element and configured for attachment to the appropriate wiring or circuit (not illustrated) to form an electrical connection of the heating element with the battery 110 when the cartridge 104 is connected to the control body 102. Specifically, a plug 140 may be positioned at a distal attachment end 142 of the cartridge 104. When the cartridge 104 is connected to the control body 102, the plug 140 engages the coupler 120 to form an electrical connection such that current controllably flows from the battery 110, through the coupler and plug, and to the heating element 134. The outer body 126 of the cartridge 104 can continue across the distal attachment end 142 such that this end of the cartridge is substantially closed with the plug 140 protruding therefrom.
A reservoir may utilize a liquid transport element to transport an aerosol precursor composition to an aerosolization zone. One such example is shown in
It is understood that an aerosol delivery device that can be manufactured according to the present disclosure can encompass a variety of combinations of components useful in forming an electronic aerosol delivery device. Reference is made for example to the reservoir and heater system for controllable delivery of multiple aerosolizable materials in an electronic smoking article disclosed in U.S. patent application Ser. No. 13/536,438, filed Jun. 28, 2012, which is incorporated herein by reference in its entirety. Further, U.S. patent application Ser. No. 13/602,871, filed Sep. 4, 2012, discloses an electronic smoking article including a microheater, and which is incorporated herein by reference in its entirety.
In another embodiment substantially the entirety of the cartridge may be formed from one or more carbon materials, which may provide advantages in terms of biodegradability and absence of wires. In this regard, the heating element may comprise a carbon foam, the reservoir may comprise carbonized fabric, and graphite may be employed to form an electrical connection with the battery and controller. Such carbon cartridge may be combined with one or more elements as described herein for providing illumination of the cartridge in some embodiments. An example embodiment of a carbon-based cartridge is provided in U.S. patent application Ser. No. 13/432,406; filed Mar. 28, 2012, which is incorporated herein by reference in its entirety.
In use, when a user draws on the article 100, the heating element 134 is activated (e.g., such as via a puff sensor), and the components for the aerosol precursor composition are vaporized in the aerosolization zone 146. Drawing upon the mouthend 130 of the article 100 causes ambient air to enter the air intake 118 and pass through the central opening in the coupler 120 and the central opening in the plug 140. In the cartridge 104, the drawn air passes through an air passage 148 in an air passage tube 150 and combines with the formed vapor in the aerosolization zone 146 to form an aerosol. The aerosol is whisked away from the aerosolization zone 146, passes through an air passage 152 in an air passage tube 154, and out the mouth opening 128 in the mouthend 130 of the article 100.
The various components of an aerosol delivery device according to the present disclosure can be chosen from components described in the art and commercially available. Examples of batteries that can be used according to the disclosure are described in U.S. Pat. App. Pub. No. 2010/0028766, the disclosure of which is incorporated herein by reference in its entirety.
An exemplary mechanism that can provide puff-actuation capability includes a Model 163PC01D36 silicon sensor, manufactured by the MicroSwitch division of Honeywell, Inc., Freeport, Ill. Further examples of demand-operated electrical switches that may be employed in a heating circuit according to the present disclosure are described in U.S. Pat. No. 4,735,217 to Gerth et al., which is incorporated herein by reference in its entirety. Further description of current regulating circuits and other control components, including microcontrollers that can be useful in the present aerosol delivery device, are provided in U.S. Pat. Nos. 4,922,901, 4,947,874, and 4,947,875, all to Brooks et al., U.S. Pat. No. 5,372,148 to McCafferty et al., U.S. Pat. No. 6,040,560 to Fleischhauer et al., and U.S. Pat. No. 7,040,314 to Nguyen et al., all of which are incorporated herein by reference in their entireties.
The aerosol precursor, which may also be referred to as an aerosol precursor composition or a vapor precursor composition, can comprise one or more different components. For example, the aerosol precursor can include a polyhydric alcohol (e.g., glycerin, propylene glycol, or a mixture thereof). Representative types of further aerosol precursor compositions are set forth in U.S. Pat. No. 4,793,365 to Sensabaugh, Jr. et al.; U.S. Pat. No. 5,101,839 to Jakob et al.; PCT WO 98/57556 to Biggs et al.; and Chemical and Biological Studies on New Cigarette Prototypes that Heat Instead of Burn Tobacco, R. J. Reynolds Tobacco Company Monograph (1988); the disclosures of which are incorporated herein by reference.
Still further components can be utilized in the aerosol delivery device of the present disclosure. For example, U.S. Pat. No. 5,261,424 to Sprinkel, Jr. discloses piezoelectric sensors that can be associated with the mouth-end of a device to detect user lip activity associated with taking a draw and then trigger heating; U.S. Pat. No. 5,372,148 to McCafferty et al. discloses a puff sensor for controlling energy flow into a heating load array in response to pressure drop through a mouthpiece; U.S. Pat. No. 5,967,148 to Harris et al. discloses receptacles in a smoking device that include an identifier that detects a non-uniformity in infrared transmissivity of an inserted component and a controller that executes a detection routine as the component is inserted into the receptacle; U.S. Pat. No. 6,040,560 to Fleischhauer et al. describes a defined executable power cycle with multiple differential phases; U.S. Pat. No. 5,934,289 to Watkins et al. discloses photonic-optronic components; U.S. Pat. No. 5,954,979 to Counts et al. discloses means for altering draw resistance through a smoking device; U.S. Pat. No. 6,803,545 to Blake et al. discloses specific battery configurations for use in smoking devices; U.S. Pat. No. 7,293,565 to Griffen et al. discloses various charging systems for use with smoking devices; U.S. Pat. No. 8,402,976 to Fernando et al. discloses computer interfacing means for smoking devices to facilitate charging and allow computer control of the device; U.S. Pat. App. Pub. No. 2010/0163063 by Fernando et al. discloses identification systems for smoking devices; and WO 2010/003480 by Flick discloses a fluid flow sensing system indicative of a puff in an aerosol generating system; all of the foregoing disclosures being incorporated herein by reference in their entireties. Further examples of components related to electronic aerosol delivery articles and disclosing materials or components that may be used in the present article include U.S. Pat. No. 4,735,217 to Gerth et al.; U.S. Pat. No. 5,249,586 to Morgan et al.; U.S. Pat. No. 5,666,977 to Higgins et al.; U.S. Pat. No. 6,053,176 to Adams et al.; U.S. Pat. No. 6,164,287 to White; U.S. Pat. No. 6,196,218 to Voges; U.S. Pat. No. 6,810,883 to Felter et al.; U.S. Pat. No. 6,854,461 to Nichols; U.S. Pat. No. 7,832,410 to Hon; U.S. Pat. No. 7,513,253 to Kobayashi; U.S. Pat. No. 7,896,006 to Hamano; U.S. Pat. No. 6,772,756 to Shayan; U.S. Pat. Nos. 8,156,944 and 8,375,957 to Hon; U.S. Pat. App. Pub. Nos. 2006/0196518 and 2009/0188490 to Hon; U.S. Pat. App. Pub. No. 2009/0272379 to Thorens et al.; U.S. Pat. App. Pub. Nos. 2009/0260641 and 2009/0260642 to Monsees et al.; U.S. Pat. App. Pub. Nos. 2008/0149118 and 2010/0024834 to Oglesby et al.; U.S. Pat. App. Pub. No. 2010/0307518 to Wang; WO 2010/091593 to Hon; and U.S. patent application Ser. No. 13/841,233, filed Mar. 15, 2013, each of which is incorporated herein by reference in its entirety. A variety of the materials disclosed by the foregoing documents may be incorporated into the present devices in various embodiments, and all of the foregoing disclosures are incorporated herein by reference in their entireties.
In rigid-bodied smoking articles, and particularly in electronic cigarettes, it is desirable to provide a “mouth feel” or “bite” that users will find comfortable. Of course, this may vary by user, but it is appreciated that many users prefer a construction that allows holding the smoking article between one's lips and/or between one's teeth that does not include direct contact of the teeth with a rigid metal or ceramic surface. Certain plastics or other polymers are used to construct mouthpieces in some smoking articles. Preferred embodiments described herein may include a metal and/or ceramic construction of a rigid tubular body that houses components for delivering an aerosol (which components may include electronic circuitry, heating elements, feedback devices, and other components). In particular, embodiments described herein may include embodiments of Vuse™ digital electronic cigarettes (R.J. Reynolds Vapor Company) and/or smoking articles and/or components of smoking articles described in one or more of U.S. Pat. No. 4,922,901 to Brooks et al.; U.S. Pat. No. 5,249,586 to Morgan et al.; U.S. Pat. No. 5,388,594 to Counts et al.; U.S. Pat. No. 5,666,977 to Higgins et al.; U.S. Pat. No. 6,196,218 to Voges; U.S. Pat. No. 6,810,883 to Felter et al.; U.S. Pat. No. 6,854,461 to Nichols; U.S. Pat. No. 7,832,410 to Hon; U.S. Pat. No. 7,513,253 to Kobayashi; U.S. Pat. No. 7,726,320 to Robinson et al.; U.S. Pat. No. 7,896,006 to Hamano; U.S. Pat. No. 6,772,756 to Shayan; U.S. Pat. No. 8,079,371 to Robinson et al.; U.S. Pat. Pub. No. 2009/0095311 to Hon; U.S. Pat. Pub. Nos. 2006/0196518, 2009/0126745, and 2009/0188490 to Hon; U.S. Pat. Pub. No. 2009/0272379 to Thorens et al.; U.S. Pat. Pub. Nos. 2009/0260641 and 2009/0260642 to Monsees et al.; U.S. Pat. Pub. Nos. 2008/0149118 and 2010/0024834 to Oglesby et al.; U.S. Pat. Pub. No. 2010/0307518 to Wang; and WO 2010/091593 to Hon; U.S. patent application Ser. No. 13/432,406, filed Mar. 28, 2012, U.S. patent application Ser. No. 13/536,438, filed Jun. 28, 2012, U.S. patent application Ser. No. 13/602,871, filed Sep. 4, 2012, U.S. patent application Ser. No. 13/647,000, filed Oct. 8, 2012, and U.S. patent application Ser. No. 13/827,994 filed on Mar. 14, 2013, each of which is incorporated herein by reference, including that all features, examples, and embodiments therein may be combined with each other and aspects of the present disclosure in a manner that those of skill in the art will appreciate with reference to the present disclosure.
Tipping materials in typical cigarettes, and in segmented smoking articles that use a combustible fuel element to heat rather than burn smokable material such as tobacco, typically include paper materials that cover a filter material (which may be encompassed by plug wrap material) to form a mouth-end of the subject smoking article. Examples of tipping materials are described in U.S. Pat. No. 7,789,089 to Dube et al., and in U.S. Pat. App. Publ. Nos. 2007/0215167 to Crooks et al., 2010/0108081 to Joyce et al., 2010/0108084 to Norman et al., and 2013/0167849 to Ademe et al., each of which is incorporated by reference herein. Representative techniques for producing smoking articles incorporating wrapping materials or having wrapping materials applied thereto are set forth in U.S. Pat. No. 5,469,871 to Barnes et al.; and U.S. Pat. Pub. Nos. 2010/0186757 to Crooks et al and 2012/0067360 to Conner et al.
One embodiment of a smoking article 500 may include a tipping-covered mouthpiece 502 (which may be embodied, for example, as a cartridge or a control body as described above with reference to
The smoking article may incorporate tobacco within an electrically-powered, aerosol-generating device. At least one form of tobacco can be positioned at one or more specific locations within the smoking article. Aerosol-forming material may be employed in addition to the tobacco. The mouthpiece 502 may be used by the smoker to inhale components of tobacco that are generated by the action of heat upon components of that smoking article. A representative smoking article includes a source of electrical power (e.g., a battery), a controller mechanism including a sensor that is capable of selectively powering certain components of the device (e.g., electrical resistance heating elements) at least during periods of draw, and at least one heating device (e.g., an electrical resistance heating unit) for forming a thermally generated aerosol that incorporates components of tobacco. During use, a cartridge containing some form of tobacco is positioned within or in connection with the smoking article, and after use, the used cartridge may be removed from the device. When desired, another cartridge may be positioned for further use.
As shown in
An upper/outer layer 224 of the double-layer tipping wrap 220 is provided in the form of an adhesive label or sleeve 224. In many embodiments the inner/lower layer 222 has a first thickness that is greater than a second thickness of the upper/outer layer 224. In the illustrated embodiment and in other embodiments, the upper/outer layer 224 may include indicia (letters/words, images, colors, textures, or other indicia) that identify properties of the mouthpiece 202 and/or a smoking article incorporating the mouthpiece. Exemplary indicia may communicate flavor(s), product source identification (e.g., branding, trademark, etc.), and/or other information, and/or it may provide aesthetic appeal. The label 224 may be an adhesive label with a paper and/or polymer construction. For example, its construction may be the same as or similar to the filter paper or plug wrap used on conventional cigarettes. Generally, an outer layer of this and other embodiments may include fleece, filter paper, plug wrap, cellulose acetate non-woven web, polymeric film, polymeric foam, or any combination thereof.
The softness, “mouth feel,” or other characterization of how a user will experience and interact with the mouth end/mouthpiece of a smoking article can be described in different manners. In particular, with reference to the focus of the present disclosure upon providing a desirable sensory interaction when the main body of the smoking article is substantially rigid, it may be useful to consider means of explaining or describing this qualitative aspect. In some embodiments, including actual and constructive experimental examples below, the trait is described with reference to durometer, which is a well-understood means for measuring hardness as a material's or structure's resistance to permanent indentation on a “Shore M” hardness scale. In each of the embodiment, the wrapped mouth end portion, whether single-wrapped, double-wrapped, and/or otherwise multiply wrapped, with or without an outer wrapping material (e.g., printable or preprinted polymer) includes more flexibility and/or less resistance to permanent indentation.
Another means of describing this trait with reference to one or more of a polymeric label, a wrapped coating, or any combination thereof applied to a smoking article is Young's Modulus, which is a common means of describing of elastic modulus, sometimes called the modulus of elasticity. It is a measure of the stiffness of an elastic material and provides a quantitative means of characterizing materials. It is defined as the ratio of the stress along an axis over the strain along that axis in the range of stress in which Hooke's law holds. Its SI unit is the Pascal (Pa or N/m2 or m−1·kg·s−2). The practical units used are megapascals (MPa or N/mm2) or gigapascals (GPa or kN/mm2). In anisotropic materials, Young's modulus may have different values depending on the direction of the applied force with respect to the material's structure. Young's modulus, E, can be calculated by dividing the tensile stress by the tensile strain in the elastic (initial, linear) portion of the stress-strain curve, applying a standard formula.
Different polymeric materials, including a range of “softness” characteristics options may be used for mouthpiece cushioning over a rigid body. At least three categories of polymers may be used by themselves, in blended formulation, and/or as a multilayer composite structure. The “softness” of the composite label could vary depending on the choices of material, the processing condition of the film (i.e. orientation process and the layer architecture). The range of moduli will fall within these three general categories:
In one working example, 3M Scotch™ Permanent Mounting foam tape (Cat #110, as available in September 2013 from 3M Co., St. Paul, Minn.) forms the inner/lower layer and is wrapped transversely around/adhered to a stainless steel tube constructed as a mouthpiece for a smoking article, and a pre-printed polymer wrapper label is adhered around its exterior surface to form the upper/outer layer. This example of foam tape is about 1.5 mm thick by 13 mm wide, including a foam layer with adhesive on both sides separated by a release liner. When wrapped around a 9.2 mm diameter stainless steel tube of an electronic cigarette mouth end, the resulting cigarette mouthpiece includes an outer diameter of about 12.7 mm and has a durometer reading of about 90 hardness, when including a peel-off printed stiff polymer wrapper label and about 47 hardness with the label removed. Those of skill in the art will appreciate that, in other embodiments, these sizes will vary in keeping with the dimensions of the underlying tube body, which has an uncoated durometer of about 100 (which may read about 98 to about 100, if the tube is thin-walled enough to flex).
In another working example, Southeast Non-Woven HNB3 substrate (non-woven cellulose acetate web about 1.7 mm thick by about 25 mm wide) was hand-cut to a 29 mm length. This forms the inner/lower layer and is wrapped transversely around/adhered to a stainless steel tube constructed as a mouthpiece for a smoking article, with the wrap forming a butt joint at its ends, and an outermost pre-printed polymer wrapper layer placed over it to form a final mouthpiece construction. When wrapped around a 9.2 mm diameter stainless steel tube with the printed polymer wrapper label applied over the web, the resulting cigarette mouth peace exhibits a diameter of 11.2 mm and has a durometer reading of about 90 Shore M hardness. In another embodiment, Schweitzer-Mauduit 240M9S plug wrap (as commercially available in September 2013) was adhered around its exterior surface to form the upper/outer layer rather than the polymer wrapper.
In another working example, rayon web fleece (e.g., SDH27 from BFF Technical Fabrics in Bridgewater, Somerset, GB; Z8713 from Hoftex Group AG in H of, Germany) is cut in a length substantially equal to the outer circumference of the stainless steel mouthpiece tubular shell. This fleece forms the inner/lower layer and is wrapped transversely around/adhered to a stainless steel tube constructed as a mouthpiece for a smoking article, and a pre-printed polymer wrapper label is adhered around its exterior surface to form the upper/outer layer. When wrapped twice around a 9.2 mm diameter stainless steel tube and with the printed polymer wrapper label applied, the resulting cigarette mouth peace exhibits a diameter of 10.0 mm and has a durometer reading of about 91 Shore M hardness. When three wraps of fleece are used, the outer diameter is about 11.1 mm and hardness remains unchanged at 92. Individual layers of fleece (without pre-printed polymer wrapper label) exhibit hardness numbers of 83 for three layers, 87 for two layers, and 92 for a single layer.
The term “substantially” as used above with reference to the length of a rectangular piece of fleece relative to the outer circumference of the stainless steel mouthpiece tubular shell will be understood by those in the art. Specifically, it will be appreciated that the length and the circumference need not be exactly identical, but will be about the same within reasonable tolerances (e.g., +/−about 1% to about 10% of a given value), and taking into account the potential for slightly mitered or tapered ends that may be used to provide smooth end-to-end abutment/fit of rectangular three-dimensional material around a cylinder. This same relative dimensional consideration applies elsewhere throughout the present disclosure, including with reference to lengths described at least about some multiple of (e.g., 1×, 2×, 3×) the outer circumference. That is for “a length at least about two times the outer circumference,” the length need not be exactly two times the circumference, but preferably will be within reasonable tolerances, and may include slightly mitered or tapered ends or otherwise overlap slightly to provide substantially smooth fit of a rectangular three-dimensional material around a cylinder. As such the length may be slightly less or slightly greater than the described multiple of the circumference, but will be understood by those in the art to substantially circumferentially encompass that circumference.
As shown in
In addition to, or in alternative to, the wrapping assemblies described, certain embodiments may include a tipping cover, which may be configured (for example) as a polymeric label and may be configured to receive and/or display visual indicia (e.g., providing information about a smoking article or smoking article component such as, for example, trade name, flavor(s), or other characteristics). The tipping cover may be constructed as a wrappable strip, a tube, or other configuration. Examples of tipping covers including polymeric labels that may be configured as heat-shrink tubes or in other configurations are described below, including with reference to
In some embodiments, heavy gauge (that is, about 100 μm to about 150 μm thick) reverse-printed PVC or PETG sleeves may be used to cover and/or decorate the unwrapped, single-wrapped, or multi-wrapped cushioned surface of a mouth end piece. The printed material (e.g., graphic images, characters) may use water or solvent-based inks. One such embodiment is shown in
In some embodiments, standard gauge (that is, about 50 μm to about 70 μm thick) PETG, PS, and/or PVC shrink sleeve materials may be adhesive-laminated together to form a two-ply shrink sleeve (about 125 μm to about 170 μm thick). The inner side of an outer, outward-facing layer may be reverse printed with indicia, and adhered (e.g., by emulsion laminated adhesive) to an inward-facing solvent seamed layer of PETG, PS, and/or PVC. This may be applied in strip form or as a heat-shrink cylinder used to cover and/or decorate the unwrapped, single-wrapped, or multi-wrapped cushioned surface of a mouth end piece. One such embodiment is shown in
Appropriate adhesives used for forming multilayer tipping covers, whether in the form of polymeric labels or otherwise, may include—for example—dry bond or wet bond adhesives. Illustrative (but non-limiting) examples of dry bond adhesives generally may be applied as follows: a liquid form of the adhesive (e.g., polyurethane dispersion, acrylic emulsion, water-based EVA and PVOH, high-solid silicone solvents) may be coated on the substrate (one layer of a multi-ply composite), dried and then laminated to a second, third, etc. substrate using heated nip rolls. Illustrative (but non-limiting) examples of wet bond adhesives generally may be applied as follows: a liquid form of the adhesive (e.g., polyurethane dispersion, acrylic emulsions, water-based EVA, PVOH, latex) may be coated on the substrate (one layer of a multi-ply composite), laminated to a second, third, etc. substrate, and then dried using heat such as heated air flow. The ink may be a water-based or solvent-based ink, preferably approved for use with food, tobacco, and similar products (e.g., including well-known inks available from Sun Chemical of Richmond, Va.).
In still other embodiments, a three-ply polymeric label may be provided, including an outer, outward-facing layer (which may be reverse printed with indicia) of PETG, PS, and/or PVC shrink sleeve materials. This outer layer may be adhesive laminated to an intermediate core layer (of a bulk softening material, for example, PE, EVA, and/or CoPP). This intermediate core layer may be adhesive laminated to an inner layer of solvent seamed PETG, PS, and/or PVC. The inner surface of the intermediate layer and/or the outward-facing surface of the inner layer may be printed with a solid color, with the same or different graphic(s) as the outer layer. This may help to provide a “3D optical effect” where the outer layer print appears to float above or otherwise have depth-difference relative to the inner layer. As such, in a three-ply embodiment, standard (about 50 μm thick) PETG shrink sleeve materials may be adhesive laminated on either side of a low-melting, (about a 50 μm to about 75 μm thick) polyolefin core layer to form an about 150 μm to about 175 μm thick composite structure. The core layer may be clear, and its thickness and/or greater elasticity/lower durometer preferably will provide a mouth feel that may be more comfortable/desirable to a user than an uncoated metal tube body of a smoking article.
One such three-ply embodiment is shown in
In each preferred shrink sleeve embodiment, the shrink sleeve materials may be heated or otherwise activated to shrink conformingly around a single or multiple layer of wrapping material that, as applied, provides a lower durometer/greater flexibility than the rigid body of a tubular mouthpiece (corresponding to a more desirable mouth-feel/bite for many users). In some embodiments, they may be applied directly to the rigid tube body. In such embodiments, the application may be secured by using heat shrink activation in a manner known in the art and appropriate to the particular heat-shrink properties known for the given material. In some embodiments, the material may be applied as an overmold. In an appropriate overmold technique, the steel tube, with or without a sleeve or wrap-around label or cushioning material already applied to it, may be inserted into a slightly larger-diameter injection mold cavity, whereupon a molten thermoplastic is injected into the gap between the tube and the cavity wall to form a tightly adhered outer cylindrical sleeve around the tube. In some embodiments, adhesive may be used to secure a tipping cover to underlying material. In various embodiments, any combination of heat-shrink, adhesive, and overmolding may be used to secure a tipping cover to a mouthpiece and or greater portion of a smoking article, whether directly to a rigid tube body and/or to underlying material such as the cushioning material(s) discussed herein.
Different embodiments of tipping covers may include silicone, latex, PET (polyethylene terephthalate), PETG (polyethylene terephthalate copolymer), PS (polystyrene), OPP (oriented polypropylene), BOPP (biaxially-oriented polypropylene), OPS (oriented polystyrene), PE (polyethylene), EPS (expanded polystyrene), PEF (polyethylene furanoate), PVDF (polyvinylidene difluoride), PEX (cross-linked polyethylene), PEBAX (polyether block amide; including heat-shrink PEBAX), PE (polyethylene), EVA (ethylene vinyl acetate), CoPP (polypropylene copolymer), FEP (fluorinated ethylene propylene), PTFE (polytetrafluoroethylene), and PVC (polyvinyl chloride), or any combination thereof within a single layer, within each layer of a multi-layer composition, and/or in each of the separate layers (e.g., one or more of the materials in each layer, alone or combined with other materials, where each layer of a multi-layer tipping cover may include the same or different compositions, which those of skill in the art will recognize with reference to the properties of each component).
Each of these materials may readily be procured from a variety of suppliers. Tipping covers using these materials may be configured as seamed or seamless shrink-tubes, shrink sleeves, soft sleeves (e.g., silicone tube/sleeve; a sleeve that may be stretched, pulled over the tube, then released to conform therearound, in contrast to tubes or sleeves that may be slipped on and shrunk by heat, UV, or other means), adhesive labels, stretch labels, stretch tubes, or composites/hybrids of one or more such structures.
Shrink sleeves (or tubes) are distinctly different from the elastic, rollable, or other soft sleeve embodiments described, which do not use a process of heating or otherwise treating the shrink material to conform and, in many embodiments, adhere to the underlying tube—which may include cushioning wrap material. It should also be noted that wrap materials may be applied in some mode other than an encircling/wrapping motion. Also, shrink sleeve and/or shrink tube materials described herein have properties well-known in the material science arts such that, one having skill in the art and informed by the present disclosure will be enabled to construct such a tube and/or sleeve, and apply material-appropriate-manner of curing or other treatment (e.g., UV or other EMF irradiation, heat, chemical treatment, or other means) that will shrink the tube and/or sleeve in a manner conforming to an underlying generally rigid tube body, which may further include one or more cushioning wrap layers. Stated another way, tipping cover embodiments may include or be comprised essentially of a shrink material (e.g., in the form of a tube and/or sleeve) that is configured to conform securely around the mouthpiece tube body and/or any material in between the tube body and the tipping cover when treated in a material-appropriate-manner.
Table 1 below shows different combinations of one-layer and two-layer structures for embodiments of a mouthpiece including a tipping cover identifying where visual indicia may be printed. The inner layer may be a single-wrapped cushioning or other material, including polymer label-type material, or a multi wrapped cushioning or other material. A “patch” label or layer refers to a layer that encircles less than a full circumference of the underlying tube body.
Table 2 below shows different combinations of one-layer and two-layer tipping cover structures for embodiments of a mouthpiece.
Certain aspects of embodiments of the present disclosure may be understood with reference to the following examples. These examples are set forth as illustrative and are not to be construed as limiting.
Using a 9.2 mm diameter stainless steel tube about 50 mm in length, a strip of 3M Scotch™ Permanent Mounting foam tape (Cat #110) was adhered to one edge of the tube at about a 25 degree angle relative to the tube's longitudinal axis and spiral wound with the tape's edges abutted tightly together to form a continuous layer of foam about 1.5 mm thick. Edges were trimmed to provide an approximately 35 mm length of cushioned surface upon which a preprinted polymer wrapper label was applied (multi-layer laminate comprising PE and OPP films). Resulting diameter of the mouth end piece was 12.7 mm. A desirable range of foam thickness may include about 0.1 mm to about 1.0 mm or, in some embodiments, about 0.30 mm to about 0.70 mm when an embodiment is desired with a smaller diameter mouthpiece than the about 1.5 mm- to about 2 mm-thick foam tape provided in this Example. Another iteration of this concept would be to have the foam layer pre-applied as part of the pre-printed label's construction (e.g., Labec™ by Commodore Solutions of Bloomfield, N.Y.). (This embodiment is similar to that described above with reference to
Another Example of a multi-wrapped mouthpiece was constructed using a strip of non-woven cellulose acetate web that was about 1.7 mm thick by about 25 mm wide that was cut to a length of about 29 mm. After using transparent tape to anchor it to an about 9.2 mm outer diameter stainless steel tube, the non-woven cellulose acetate piece was wrapped around the tube with the about 29 mm length encircling the tube to form a “butt joint.” Thereafter, another strip with about the same dimensions was attached in the same manner immediately abutting the first strip along the longitudinal end of each, and was then cut circumferentially to form about am about 36 mm longitudinal length of the padded tube mouthpiece along the tube. Then, a preprinted polymer wrapper label was applied. In this example, the resulting outer diameter of the mouth end piece was about 11.2 mm. A desirable range of web thickness may include about 0.1 mm to about 1.0 mm or, in some embodiments, about 0.30 mm to about 0.70 mm thickness, which may be about 0.5 mm. (This embodiment is somewhat similar to that shown in
Another Example of a multi-wrapped mouthpiece was constructed using a strip of non-woven Rayon fleece web that was about 0.15 mm thick by about 36 mm wide, which was cut to a length of about 29 mm. After using transparent tape to anchor this strip to an about 9.2 mm outer diameter stainless steel tube, the non-woven Rayon fleece piece was wrapped around the tube with the about 29 mm length encircling the tube. A preprinted polymer wrapper label was applied over the fleece piece to form the cushioned mouth end tipping. Resulting diameter of the mouth end piece was about 9.6 mm. A desirable fleece thickness in certain embodiments where a smaller diameter is desired may range from about 0.1 mm to about 1.0 mm, with certain embodiments preferably about 0.30 mm to 0.70 mm, which may be about 0.5 mm.
Additionally, another similar (to Example 2) cigarette mouth piece was constructed by using transparent tape to anchor a non-woven Rayon fleece strip that was about 58 mm long to an about 9.2 mm outer diameter stainless steel tube and wrapped around the tube with the about 52 mm length encircling the tube twice to form an overlapping joint. A preprinted polymer wrapper label was applied over this fleece strip to form the mouth end tipping. The resulting diameter of the mouth end piece was about 10 mm.
Another cigarette mouth piece (similar to Examples 2 and 3) was constructed by using transparent tape to anchor a non-woven Rayon fleece strip that was about 88 mm long to an about 9.2 mm outer diameter stainless steel tube and wrapped around the tube with the about 88 mm length thrice encircling the tube to form an overlapping joint. A preprinted polymer wrapper label was applied over the fleece piece to form the mouth end tipping. Resulting diameter of the mouth end piece was about 11.1 mm. A desirable range of fleece thickness in some other embodiments may range from about 0.1 mm to about 1.0 mm or, in certain embodiments, about 0.30 mm to about 0.70 mm, which may be about 0.5 mm. (The construction of this example may be appreciated with reference to
Another Example of a multi-wrapped mouthpiece was constructed using a strip of 50 gram/m2 tipping paper web that was about 0.077 mm thick and about 36 mm wide, which was cut to a length of about 29 mm. After using transparent tape to anchor the strip of paper web to an about 9.2 mm outer diameter stainless steel tube, the 50 gram tipping paper piece was wrapped around the tube with the about 29 mm length encircling the tube. A preprinted polymer wrapper label was applied over the paper piece to form the mouth end tipping. The outer diameter of the mouth end piece thus formed was about 10.0 mm. A desirable range of paper web thickness in certain other embodiments may range from about 0.1 mm to about 1.0 mm or, in some embodiments, about 0.30 mm to about 0.70 mm, which may be about 0.4 mm or about 0.5 mm.
Another cigarette mouth piece was constructed by using transparent tape to anchor a 50 gram/m2 tipping paper piece that was about 58 mm long to a 9.2 mm outer diameter stainless steel tube. Thereafter, the tipping paper was wrapped around the tube with the about 58 mm length encircling the tube twice and forming an overlapping joint. A pre-printed polymer wrapper label was applied over the paper piece to complete the mouth end tipping structure. The final outer diameter of the mouth end piece was about 10.4 mm.
Another cigarette mouth piece (similar to Examples 5 and 6) was constructed using transparent tape to anchor a 50-gram tipping paper strip that was about 88 mm long to an about 9.2 mm stainless steel tube. The tipping paper strip was thrice wrapped around the tube to form a cushioned mouth end. A preprinted polymer wrapper label was applied over the paper piece to form the mouth end tipping. Resulting diameter of the mouth end piece was about 11.5 mm. A desirable range of paper web thickness in certain other embodiments may range from about 0.1 mm to about 1.0 mm or, in some embodiments, about 0.30 mm to about 0.70 mm, which may be about 0.4 mm or about 0.5 mm.
Another smoking article mouthpiece was constructed as follows: an about 33 mm wide by about 36 mm long self-adhesive label strip with printed insignia was applied to a stainless steel tube about 9.2 mm in outer diameter and about 37 mm in height. The label was manually wrapped in its width direction around the steel tube so that the label overlapped with itself by about 4 mm. A length of Raychem RNF-100-1/2-CL-FSP clear cross-linked polyethylene shrink tubing was received in flattened form from Tyco Electronics (Menlo Park, Calif.). An about 37 mm-long piece was cut and slipped over the stainless steel tube previously prepared as described. This shrink tubing had an original layflat width of 22 mm, corresponding to an outer diameter of 14 mm when shaped round, so that it could be slipped effortlessly onto the steel tube. The tubing was shrunk in a natural convection oven preheated to 235° F. for about 5 minutes, then removed from the oven and allowed to cool back to room temperature. In the final product, the tubing was tightly shrunk around the steel tube and self-adhesive label. The lengths of the shrink tubing and steel tube matched each other closely. The two original axial crease lines on the shrink tubing, due its being flattened by the manufacturer, had disappeared. The insignia on the self-adhesive label were clearly and vividly visible through the shrink tubing. The shrunk tubing had a final thickness of about 0.45 mm. The self-adhesive label overlap could not be felt by touch through the shrink tubing such that there was no perceptible seam line. It should be appreciated that the tipping cover embodied here as a heat-shrink sleeve may cover the entire smoking article length, or any portion thereof (e.g., limited to the mouthpiece length, or to some other length as desired).
Those of skill in the art will appreciate that embodiments not expressly illustrated herein may be practiced within the scope of the claims, including that features described herein for different embodiments may be combined with each other and/or with currently-known or future-developed technologies while remaining within the scope of the claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation unless specifically defined by context, usage, or other explicit designation. It is therefore intended that the foregoing detailed description be regarded as illustrative rather than limiting. And, it should be understood that the following claims, including all equivalents, are intended to define the spirit and scope of this invention. Furthermore, the advantages described above are not necessarily the only advantages of the invention, and it is not necessarily expected that all of the described advantages will be achieved with every embodiment. In the event of any inconsistent disclosure or definition from the present application conflicting with any document incorporated by reference, the disclosure or definition herein shall be deemed to prevail.
