Patent Publication Number: US-2021176826-A1

Title: Electronic vaping device with outlet-end illumination

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This is a continuation of U.S. application Ser. No. 15/931999, filed May 14, 2020, which is a continuation application of U.S. application Ser. No. 15/858425, filed Dec. 29, 2017, the entire contents of each of which are incorporated herein by reference. 
    
    
     BACKGROUND 
     Field 
     The present disclosure relates to electronic vaping devices, e-vaping devices, and/or non-combustible vaping devices. 
     Description of Related Art 
     An e-vaping device includes a heater element which vaporizes a pre-vapor formulation to generate a “vapor,” sometimes referred to herein as a “generated vapor.” 
     The e-vaping device includes a power supply, such as a rechargeable battery, arranged in the device. The battery is electrically connected to the vapor generator, such that the heater element therein heats to a temperature sufficient to convert a pre-vapor formulation to a generated vapor. The generated vapor exits the e-vaping device through an outlet-end insert that includes an outlet. 
     SUMMARY 
     According to some example embodiments, a cartridge for an e-vaping device may include a structural element at least partially defining a reservoir, the reservoir configured to hold a pre-vapor formulation, a vapor generator configured to draw the pre-vapor formulation from the reservoir and to heat the drawn pre-vapor formulation to form a generated vapor, a housing extending along a longitudinal axis of the cartridge, and an outlet-end insert coupled to the housing. The housing may at least partially enclose the reservoir and the vapor generator. The housing may have a tip end and an outlet end. The housing may be configured to channel light from the tip end of the housing to the outlet end of the housing via internal reflection through an interior of the housing. The outlet-end insert may be coupled to the outlet end of the housing. The outlet-end insert may include at least one outlet in flow communication with the vapor generator. The outlet-end insert may be configured to direct the generated vapor out of the cartridge through the at least one outlet. The outlet-end insert may be further configured to emit the channeled light. 
     The housing may be configured to receive, at the tip end of the housing, light emitted from a light source that is external to the cartridge through an opening at a tip end of the cartridge. 
     The cartridge may further include a light source at a tip end of the cartridge. The light source may be configured to emit at least a portion of the received light. 
     The light source may be configured to emit light having a selected color of a plurality of colors. 
     The outlet-end insert may be configured to channel the channeled light substantially exclusively through an outlet-end surface of the outlet-end insert. The outlet-end surface may extend substantially orthogonally to a longitudinal axis of the cartridge. 
     The housing and the outlet-end insert may be included in an individual integral element. 
     At least the housing may be transparent to visible light in a direction that is substantially orthogonal to the longitudinal axis of the cartridge. 
     According to some example embodiments, an e-vaping device may include a cartridge and a power supply section. The cartridge may include a structural element at least partially defining a reservoir, the reservoir configured to hold a pre-vapor formulation, a vapor generator configured to draw the pre-vapor formulation from the reservoir and to heat the drawn pre-vapor formulation to form a generated vapor, a housing extending along a longitudinal axis of the cartridge, and an outlet-end insert coupled to the housing. The housing may at least partially enclose the reservoir and the vapor generator. The housing may have a tip end and an outlet end. The housing may be configured to channel light from the tip end of the housing to the outlet end of the housing via internal reflection through an interior of the housing. The outlet-end insert may be coupled to the outlet end of the housing. The outlet-end insert may include at least one outlet in flow communication with the vapor generator. The outlet-end insert may be configured to direct the generated vapor out of the cartridge through the at least one outlet. The outlet-end insert may be further configured to emit the channeled light. The power supply section may be configured to supply electrical power to the cartridge to cause the vapor generator to form the generated vapor. 
     The e-vaping device may further include a light source included in one of the cartridge and the power supply section. The light source may be configured to emit light based on electrical power received from the power supply section. The housing may be configured to receive at least a portion of the light emitted by the light source at the tip end of the housing. 
     The e-vaping device may further include control circuitry configured to activate the light source based on a determination that air is being drawn through at least a portion of the e-vaping device. The control circuitry further may be configured to cause the light source to remain activated for at least a particular period of elapsed time following a cessation of air being drawn through at least the portion of the e-vaping device. 
     The light source may be configured to emit light having a particular property. The particular property may be a color of the light and/or a brightness of the light. The control circuitry may be further configured to control the particular property of the light emitted by the light source, based on a determination that the light source has emitted light for at least a threshold period of elapsed time, a determined amount of pre-vapor formulation held in the reservoir, a determined amount of electrical charge held in the power supply section, and/or a magnitude of generated vapor that is generated by the vapor generator. 
     The outlet-end insert may be configured to channel the channeled light substantially exclusively through an outlet-end surface that extends at least partially orthogonally to a longitudinal axis of the cartridge. 
     The housing and the outlet-end insert may be included in an individual integral element. 
     At least the housing may be transparent to visible light in a direction that is substantially perpendicular to the longitudinal axis of the cartridge. 
     At least the power supply section may include a housing that is opaque to visible light. 
     The power supply section and the cartridge may be configured to be removably coupled together. 
     The power supply section may include a rechargeable battery. 
     According to some example embodiments, a method for operating an e-vaping device may include determining that at least a threshold flow of air is being drawn through at least an outlet-end insert of the e-vaping device, and controlling a light source of the e-vaping device to emit light through an interior of the e-vaping device based on the determining, such that the light is transmitted through an interior of a housing of the e-vaping device to the outlet-end insert, and the outlet-end insert emits the channeled light. 
     The light source may be configured to emit light having a particular property. The particular property may be a color of the light and/or a brightness of the light. The controlling may include controlling the particular property of the light emitted by the light source, based on a determination that the light source has emitted light for at least a threshold period of elapsed time, a determined amount of pre-vapor formulation held in a reservoir of the e-vaping device, a determined amount of electrical charge held in a power supply section of the e-vaping device, and/or a magnitude of generated vapor that is generated by a heating element of the e-vaping device. 
     The outlet-end insert may be configured to channel the channeled light substantially exclusively through an outlet-end surface that extends at least partially orthogonally to a longitudinal axis of the e-vaping device. 
     The housing and the outlet-end insert may be included in an individual integral element. 
     At least the housing may be transparent to visible light in a direction that is substantially perpendicular to a longitudinal axis of the e-vaping device. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The various features and advantages of the non-limiting embodiments herein may become more apparent upon review of the detailed description in conjunction with the accompanying drawings. The accompanying drawings are merely provided for illustrative purposes and should not be interpreted to limit the scope of the claims. The accompanying drawings are not to be considered as drawn to scale unless explicitly noted. For purposes of clarity, various dimensions of the drawings may have been exaggerated. 
         FIG. 1A  is a side view of an e-vaping device, according to some example embodiments; 
         FIG. 1B  is a longitudinal cross-sectional view along line IB-IB&#39; of the e-vaping device of  FIG. 1A ; 
         FIG. 1C  is an orthogonal cross-sectional view along line IC-IC′ of the e-vaping device of  FIG. 1A ; 
         FIG. 1D  is a longitudinal cross-sectional view of an outlet end of an e-vaping device, according to some example embodiments; 
         FIG. 1E  is a longitudinal cross-sectional view of a portion of an e-vaping device, according to some example embodiments; and 
         FIG. 2  is a flowchart illustrating operations that may be performed, according to some example embodiments. 
     
    
    
     DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS 
     Some detailed example embodiments are disclosed herein. However, specific structural and functional details disclosed herein are merely representative for purposes of describing example embodiments. Example embodiments may, however, be embodied in many alternate forms and should not be construed as limited to only the example embodiments set forth herein. 
     Accordingly, while example embodiments are capable of various modifications and alternative forms, example embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit example embodiments to the particular forms disclosed, but to the contrary, example embodiments are to cover all modifications, equivalents, and alternatives falling within the scope of example embodiments. Like numbers refer to like elements throughout the description of the figures. 
     It should be understood that when an element or layer is referred to as being “on,” “connected to,” “coupled to,” or “covering” another element or layer, it may be directly on, connected to, coupled to, or covering the other element or layer or intervening elements or layers may be present. In contrast, when an element is referred to as being “directly on,” “directly connected to,” or “directly coupled to” another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout the specification. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. 
     It should be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers, and/or sections should not be limited by these terms. These terms are only used to distinguish one element, region, layer, or section from another region, layer, or section. Thus, a first element, region, layer, or section discussed below could be termed a second element, region, layer, or section without departing from the teachings of example embodiments. 
     Spatially relative terms (e.g., “beneath,” “below,” “lower,” “above,” “upper,” and the like) may be used herein for ease of description to describe one element or feature&#39;s relationship to another element(s) or feature(s) as illustrated in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the term “below” may encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. 
     The terminology used herein is for the purpose of describing various example embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “includes,” “including,” “comprises,” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. 
     Example embodiments are described herein with reference to cross-sectional illustrations that are schematic illustrations of idealized embodiments (and intermediate structures) of example embodiments. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, example embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. 
     Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, including those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. 
     When the terms “about” or “substantially” are used in this specification in connection with a numerical value, it is intended that the associated numerical value include a tolerance of ±10% around the stated numerical value. Moreover, when reference is made to percentages in this specification, it is intended that those percentages are based on weight, i.e., weight percentages. The expression “up to” includes amounts of zero to the expressed upper limit and all values therebetween. When ranges are specified, the range includes all values therebetween such as increments of 0.1%. Moreover, when the words “generally” and “substantially” are used in connection with geometric shapes, it is intended that precision of the geometric shape is not required but that latitude for the shape is within the scope of the disclosure. Although the tubular elements of the embodiments may be cylindrical, other tubular cross-sectional forms are contemplated, such as square, rectangular, oval, triangular and others. 
       FIG. 1A  is a side view of an e-vaping device  10 , according to some example embodiments.  FIG. 1B  is a longitudinal cross-sectional view along line IB-IB′ of the e-vaping device  10  of  FIG. 1A .  FIG. 1C  is an orthogonal cross-sectional view along line IC-IC′ of the e-vaping device  10  of  FIG. 1A . 
     In at least one example embodiment, as shown in  FIGS. 1A-1B , an electronic vaping device (e-vaping device)  10  may include a replaceable cartridge (or first section)  15 , sometimes referred to herein as an “e-vaping tank,” and a reusable battery section (or second section, also referred to herein as a power supply section)  20 , which may be coupled together at the respective interfaces  25 A,  25 B. The interfaces  25 A,  25 B may be configured to be removably coupled together, such that the first section  15  and the second section  20  are configured to be removably coupled together. It should be appreciated that each interface (also referred to herein as a connector) of the interfaces  25 A,  25 B may be any type of interface, including a snug-fit, detent, clamp, bayonet, and/or clasp. In the example embodiments shown in  FIGS. 1A-1C , air inlet ports  27  extend through a portion of the interface  25 B. It will be appreciated that, in some example embodiments, an air inlet port  27  may extend through a separate portion of the e-vaping device  10 , including, for example, interface  25 A. 
     In some example embodiments, at least one air inlet port  27  may be formed in first housing  30 , second housing  30 ′, interface  25 A, and/or interface  25 B. In some example embodiments, the air inlet ports  27  may be machined with precision tooling such that their diameters are closely controlled and replicated from one e-vaping device  10  to the next during manufacture. 
     In some example embodiments, the air inlet ports  27  may be drilled with carbide drill bits or other high-precision tools and/or techniques. In some example embodiments, the first housing  30  and/or second housing  30 ′ may be at least partially formed of metal or metal alloys such that the size and shape of the air inlet ports  27  may not be altered during manufacturing operations, packaging, and vaping. Thus, the air inlet ports  27  may provide consistent resistance to draw (“RTD”). In some example embodiments, the air inlet ports  27  may be sized and configured such that the e-vaping device  10  has a RTD in the range of from about 60 mm H 2 O to about 150 mm H 2 O. 
     In some example embodiments, one or more interfaces of the interfaces  25 A,  25 B may be the connector described in U.S. application Ser. No. 15/154,439, filed May 13, 2016 and published as U.S. Application Pub. No. 2017/0325502 on Nov. 16, 2017, the entire contents of which is incorporated herein by reference thereto. As described in U.S. application Ser. No. 15/154,439, published as U.S. Application Pub. No. 2017/0325502 on Nov. 16, 2017, an interface of the interfaces  25 A,  25 B may be formed by a deep drawn process. 
     In some example embodiments, the first section  15  may include the first housing  30  and the second section  20  may include the second housing  30 ′. The e-vaping device  10  includes an outlet-end insert  35  at a first end. As referred to herein, the first end of the e-vaping device  10  may be referred to as an outlet end  45  of the e-vaping device  10 . In some example embodiments, the outlet-end insert  35  and the first housing  30  may be transparent to visible light in one or more directions. The outlet-end insert  35  and the first housing  30  may at least partially comprise a transparent material, including one or more of a transparent plastic material, a transparent glass material, some combination thereof, or the like. 
     Referring to  FIGS. 1A-1B , in some example embodiments, the first section  15  may include a structural element (also referred to herein as an inner tube  32 ) at least partially defining a reservoir  34  configured to hold a pre-vapor formulation, a vapor generator  40  configured to draw the pre-vapor formulation from the reservoir  34  and to heat the drawn pre-vapor formulation to form a generated vapor, and a first housing  30  extending along a longitudinal axis of the first section  15 , and the outlet-end insert  35  coupled to an outlet end  31 B of the first housing  30 . The first housing  30  may at least partially enclose the reservoir  34  and the vapor generator  40 . The first housing  30  has a tip end  31 A and the outlet end  31 B. The outlet-end insert  35  may include a cavity  35 A and at least one outlet air port  36  in flow communication with the vapor generator  40  via at least the cavity  35 A. The outlet-end insert  35  may be configured to direct a generated vapor, generated at the vapor generator  40 , out of the first section  15  through the at least one outlet air port  36 . 
     In some example embodiments, the first housing  30  and/or the second housing  30 ′ is transparent to visible light in a direction that is substantially orthogonal to the longitudinal axis of the first section  15 . In some example embodiments, the second housing  30 ′ and/or the first housing  30  may be opaque to visible light. 
     As described further below, the first housing  30  may be configured to channel light through an interior of the first housing  30  via internal reflection. For example, as shown in  FIG. 1B , the first housing  30  may receive light  92  at the tip end  31 A of the first housing  30 , and the light  92  may be channeled, as internally-reflected light  94 , through an interior (thickness  30 C) of the first housing  30  from the tip end  31 A to the outlet end  31 B thereof based on internal reflection of the internally-reflected light  94  between an inner surface  30 A of the first housing  30  and an outer surface  30 B of the first housing  30 . 
     As shown in  FIG. 1B , the first housing  30  may include a tip-end portion  33  that is configured to receive light  92  at the tip end  31 A of the first housing  30  into the interior of the first housing  30 . As shown, the tip-end portion  33  is configured to enable the light  92  to pass into the interior of the first housing  30  such that the light is internally-reflected through the thickness  30 C of the first housing  30 , from the tip end  31 A of the first housing  30  to the outlet end  31 B of the first housing, as internally-reflected light  94  between the inner surface  30 A of the first housing  30  and the outer surface  30 B of the first housing  30 . 
     As further described below, the internally-reflected light  94  may be directed (“emitted”) from the outlet end  31 B of the first housing  30  to the outlet-end insert  35 , where the light may be further channeled through the outlet-end insert  35  to be emitted from the e-vaping device  10  as emitted light  96 . As shown in  FIG. 1B , the emitted light  96  may be emitted at least partially from an outlet-end surface  35 B of the outlet-end insert  35 , where the outlet-end surface  35 B extends at least partially orthogonally to a longitudinal axis of the first section. 
     Referring back to  FIGS. 1A-1B , the first section  15  may include the inner tube  32  that defines an inner longitudinal boundary of the reservoir  34 , and the first housing  30  may define an outer longitudinal boundary of the reservoir  34 , such that that the reservoir  34  is an annular cylindrical reservoir  34  in the first section  15 . As further shown in  FIG. 1B , the outlet-end insert  35  may define an outlet-end boundary of the reservoir  34 , and the first section  15  may include a transfer pad  38  that defines a tip end of the reservoir  34 . In some example embodiments, the first section  15  may include a gasket assembly (not shown in  FIGS. 1A-1C ) that defines an outlet end of the reservoir  34 , such that the gasket assembly is between the reservoir  34  and the outlet-end insert  35 . 
     The inner tube  32  may define at least a portion of a channel  42  extending through the first section  15 . As shown in  FIG. 1B , the tip end of the inner tube  32  is coupled with the transfer pad  38  such that the tip end of the inner tube  32  extends through the transfer pad  38  and the inner tube  32  defines the channel  42  such that the channel  42  is in fluid communication with a conduit  41 A, described further below. As further shown in  FIG. 1B , the outlet end of the inner tube  32  is coupled with the outlet-end insert  35 , at cavity  35 A with which the outlet air ports  36  are in fluid communication, such that the inner tube  32  defines the channel  42  such that the channel  42  is in fluid communication with the outlet air ports  36 . 
     The reservoir  34  may be refillable via a reservoir opening using any commercially-available pre-vapor formulation in order to continually reuse first section  15 . In some example embodiments, the reservoir opening is included in the outlet-end insert and enables access to the reservoir  34  from an exterior of the first section  15 . 
     As shown in  FIG. 1B , the transfer pad  38  provides a seal with the first housing  30  and further is configured to transport pre-vapor formulation from the reservoir  34  and between opposite (outlet-end and tip-end) surfaces of the transfer pad  38  to a dispensing interface  41  that is described further below. 
     In some example embodiments, the transfer pad  38  includes a plurality of fibers. Each fiber of the plurality of fibers may be substantially parallel to a longitudinal axis of the e-vaping device  10 . The transfer pad  38  may be formed of at least one of polypropylene and polyester. The transfer pad  38  may be formed by melt blowing, which is a process by which micro- and/or nano-fibers are formed from at least one polymer that is melted and extruded through small nozzles surrounded by high speed blowing gas and/or air. The polymers used in the melt blowing process do not include any processing aids, such as antistatics, lubricants, bonding agents, and/or surfactants. Thus, the polymers are substantially pure and the transfer pad  38  is inert to the pre-vapor formulation. In some example embodiments, the polymers may be mixed with processing aids, such as antistatics, lubricants, bonding agents, and/or surfactants. The transfer pad  38  may be obtained from Essentra Public Limited Company (PLC). 
     In some example embodiments, the transfer pad  38  includes an outer side wall. The outer side wall may have a coating thereon that aids in reducing leakage and/or forming a seal between the transfer pad  38  and an inner surface of the first housing  30 . In some example embodiments, the transfer pad  38  includes a plurality of channels. Each of the plurality of channels is between adjacent ones of the plurality of fibers. 
     In some example embodiments, about 50% to about 100% (e.g., about 55% to about 95%, about 60% to about 90%, about 65% to about 85%, or about 70% to about 75%) of the plurality of fibers extend substantially in the longitudinal axis of the e-vaping device  10 . In some example embodiments, about 75% to about 95% (e.g., about 80% to about 90% or about 82% to about 88%) of the plurality of fibers extend substantially in the longitudinal axis. 
     The transfer pad  38  may be generally cylindrical or disc shaped, but the transfer pad is not limited to cylindrical or disc shaped forms and a shape of the transfer pad may depend on a shaped of the reservoir and housing. An outer diameter of the transfer pad  38  may range from about 3.0 mm to about 20.0 mm (e.g., about 5.0 mm to about 18.0 mm, about 7.0 mm to about 15.0 mm, about 9.0 mm to about 13.0 mm, or about 10.0 mm to about 12.0 mm). 
     In some example embodiments, the transfer pad  38  is oriented, such that the channels mostly transverse to the longitudinal axis of the first housing  30  (where the longitudinal axis of the first housing  30  may be the longitudinal axis of the e-vaping device  10 ). In some example embodiments, the transfer pad  38  is oriented, such that the channels do not run transverse to the longitudinal axis of the first housing  30 . 
     While not wishing to be bound by theory, it is believed that the pre-vapor formulation travels through the channels, and a diameter of the channels is such that a liquid surface tension and pressurization within the reservoir moves and holds the pre-vapor formulation within the channel without leaking. 
     Based on the Hagen-Poiseuille equation and principles of capillary action, it is believed that the flow rate of the pre-vapor formulation through the channels is directly proportional to the channel pore size and the liquid surface tension. Moreover, it is believed that the flow rate of the pre-vapor formulation through the channels is inversely proportional to the liquid viscosity and channel length. 
     In some example embodiments, the transfer pad  38  has a density ranging from about 0.08 g/cc to about 0.3 g/cc (e.g., about 0.01 g/cc to about 0.25 g/cc or about 0.1 g/cc to about 0.2 g/cc). The transfer pad  38  has a length ranging from about 0.5 millimeter (mm) to about 10.0 mm (e.g., about 1.0 mm to about 9.0 mm, about 2.0 mm to about 8.0 mm, about 3.0 mm to about 7.0 mm, or about 4.0 mm to about 6.0 mm). In some example embodiments, as the density of the transfer pad  38  increases, the length of the transfer pad decreases. Thus, transfer pads  38  having lower densities within the above-referenced range may be longer than transfer pads  38  having higher densities. 
     In some example embodiments, the transfer pad  38  has a length of about 5.0 mm to about 10.0 mm and a density of about 0.08 g/cc to about 0.1 g/cc. 
     In some example embodiments, the transfer pad  38  has a length of about 0.5 mm to about 5.0 mm and a density of about 0.1 g/cc to about 0.3 g/cc. 
     In some example embodiments, the density and/or length of the transfer pad  38  is chosen based on the viscosity of a liquid flowing therethrough. Moreover, the density of the transfer pad  38  is chosen based on desired vapor mass, desired flow rate of the pre-vapor formulation flow rate, and the like. 
     As shown in  FIG. 1B , the vapor generator  40  includes the dispensing interface  41 , where the dispensing interface  41  is configured to draw pre-vapor formulation from the reservoir  34 , and a heating element  43  configured to vaporize the drawn pre-vapor formulation to form a generated vapor. 
     The dispensing interface  41  is coupled to the transfer pad  38 , such that the dispensing interface  41  may extend transversely over at least a portion of the tip-end side of the transfer pad  38 . As described above, the transfer pad  38  is configured to transport pre-vapor formulation from the reservoir  34  to the tip-end side of the transfer pad  38 . Thus, the dispensing interface  41  is in fluid communication with the reservoir  34  via the transfer pad  38 . As a result, the dispensing interface  41  is configured to transport pre-vapor formulation from the reservoir  34  through the transfer pad  38  to the heating element  43 . 
     The heating element  43  is configured to generate heat. As shown in  FIG. 1B , the heating element  43  is coupled to the tip-end side of the dispensing interface  41  and may extend along the surface of the tip-end side of the dispensing interface  41 . 
     The dispensing interface  41  is configured to draw pre-vapor formulation from the transfer pad  38 , such that the pre-vapor formulation may be vaporized from the dispensing interface  41  based on heating of the dispensing interface  41  by the heating element  43 . 
     During vaping, pre-vapor formulation may be transferred from the reservoir  34  and/or storage medium in the proximity of the heating element  43  via capillary action of the dispensing interface  41 . As shown, the heating element  43  may at least partially extend along a tip-end side of the dispensing interface  41  such that when the heating element  43  is activated to generate heat, the pre-vapor formulation in the portion of the dispensing interface  41  that is proximate to the tip-end side of the dispensing interface  41  may be vaporized by the heating element  43  to form a generated vapor. 
     As shown in  FIG. 1B , the dispensing interface includes the conduit  41 A, where the conduit  41 A is extending through the dispensing interface  41  and in fluid communication with the channel  42  of the inner tube  32 . 
     Still referring to  FIG. 1B , first section  15  includes an interior space  44  at a backside (tip-end) portion of the vapor generator  40 . The interior space  44  is at least partially defined by first housing  30 , interface  25 A, and vapor generator  40 . The interior space  44  assures communication between the channel  42  and one or more air inlet ports  27  that may extend between the interior space  44  and an exterior of the e-vaping device  10 . Thus, the conduit  41 A establishes fluid communication between the air inlet ports  27  and the channel  42  via the interior space  44 , thereby enabling air to be drawn into the channel  42  from the air inlet ports  27 . 
     In some example embodiments, generated vapor that is generated by the vapor generator  40  based on the heating element  43  vaporizing at least some pre-vapor formulation drawn into the dispensing interface  41  from the reservoir  34  may be at least partially entrained in air drawn into the channel  42  from the air inlet ports  27 . As a result, the generated vapor may be drawn through the channel  42  to the cavity  35 A. The generated vapor may then be drawn out of the e-vaping device via outlet air ports  36  in the outlet-end insert  35 . 
     Referring to  FIGS. 1A-1C , the first section  15  includes the outlet-end insert  35  coupled to the first housing  30  and the inner tube  32 , such that the outlet-end insert  35  both defines an outlet-end side of the reservoir  34  and establishes fluid communication between the cavity  35 A and outlet air ports  36  of the outlet-end insert  35  with the channel  42 . In some example embodiments, the first section  15  may further include a gasket assembly between the outlet-end insert  35  and the inner tube  32 , such that the outlet-end insert  35  is connected to the first housing  30  and is in fluid communication with the channel  42  via one or more conduits extending through the gasket assembly. 
     As shown in  FIG. 1A-1C , the outlet-end insert  35  includes one or more outlet air ports  36  that extend at least partially through the outlet-end insert  35 . As further shown, the outlet-end insert  35  may include the cavity  35 A where the cavity  35 A is connected to the outlet air ports  36 . As shown, the outlet-end insert  35  may be coupled to the inner tube  32  such that the cavity is in direct fluid communication with an outlet end of the channel  42 , thereby establishing fluid communication between the outlet air ports  36  and the channel  42  via the cavity  35 A. As a result, air drawn through the channel  42  towards the outlet end of the e-vaping device  10  may be drawn out of the e-vaping device via the cavity  35 A and one or more of the outlet air ports  36 . 
     Still referring to  FIGS. 1A-1C , the outlet-end insert  35  may be configured to receive internally-reflected light  94  channeled through an interior (thickness  30 C) of the first housing  30  between the inner surface  30 A of the first housing  30  and the outer surface  30 B of the first housing  30 , channel the received light through at least a portion of the interior of the outlet-end insert  35 , and emit the channeled light as emitted light  96  through at least one surface of the outlet-end insert  35 . 
     For example, as shown in  FIG. 1B , the outlet-end insert  35  may receive internally-reflected light  94  from the first housing  30  at an interface between the outlet-end insert  35  and the outlet end  31 B of the first housing  30 . The outlet-end insert  35  may further channel the received light, based on one or more of internal reflection, refraction, transmission, etc., to the outlet-end surface  35 B of the outlet-end insert  35 , thereby enabling the light to be emitted as emitted light  96 , such that the light  96  is emitted in one or more directions that are orthogonal or substantially orthogonal to the outlet-end surface  35 B. In some example embodiments, the light may be at least partially emitted through one or more outer sidewalls of the outlet-end insert  35 . In some example embodiments, the outlet-end insert  35  is configured to channel the received light substantially exclusively through an outlet-end surface  35 B that extends at least partially orthogonally to a longitudinal axis of the first section  15 . 
     As described further below, the internally-reflected light  94  that is channeled through the first housing  30  via internal reflection and emitted through a surface of the outlet-end insert  35  as emitted light  96  may provide an indication of one or more instances of information to an adult vapor from an outlet-end of the e-vaping device  10 . For example, as further described below, the light  92  that is received by the first housing  30  and channeled therethrough may be emitted by a light source in the e-vaping device  10 , where the light source emits the light  92  to have one or more particular properties associated with particular information, such that the emitted light  96  indicates the particular information to an adult vaper observing the emitted light  96 . 
     In some example embodiments, an e-vaping device  10  may be configured to be manipulated by an adult vaper such that the outlet end  45  of the e-vaping device  10  is proximate to the adult vaper and a tip end  50  is distal to the adult vaper. 
     Because the e-vaping device  10  may be configured to emit the emitted light  96  through a surface of the outlet-end insert  35 , based on the internally-reflected light  94  being channeled through an interior of the first housing  30  via internal reflection, the light  96  may be emitted towards an adult vaper manipulating the e-vaping device  10 . 
     Thus, where the emitted light  96  is emitted to provide an indication of information to the adult vaper, an e-vaping device  10  that is configured to emit the light  96  through the outlet-end insert  35  may be configured to provide improved visibility of the information-indicating light  96  to an adult vaper manipulating the e-vaping device  10 , thereby improving the ability of the e-vaping device  10  to communicate information to an adult vaper manipulating the e-vaping device  10 . 
     In addition, because the e-vaping device  10  is configured to emit light  96  from the outlet-end insert  35  of the e-vaping device  10 , the e-vaping device  10  is configured to reduce the visibility of the emitted light  96  to other portions of a proximate environment in which an adult vaper is located (e.g., away from the adult vaper). 
     As a result, the transmission of the emitted light  96  to the surrounding environment may be at least partially restricted to the adult vaper, thereby at least partially restricting the recipients of information communicated by the emitted light  96  to the adult vaper to which the outlet end  45  may be proximate. Furthermore, the reduced transmission of the emitted light  96  to the surrounding environment may improve privacy for the adult vaper, as observability of the emitted light  96  may be at least partially restricted to the adult vaper manipulating the e-vaping device. 
     Still referring to  FIG. 1B , the e-vaping device  10  includes electrical pathways  48 A,  48 B that may electrically couple at least the heating element  43  to a power supply  12  included in the second section  20 . The electrical pathways  48 A,  48 B may include one or more electrical connectors. In some example embodiments, if and/or when interfaces  25 A,  25 B are coupled together, the heating element  43  and the power supply  12  may be electrically coupled together via electrical pathways  48 A,  48 B. 
     In some example embodiments, one or more of the interfaces  25 A,  25 B include one or more of a cathode connector and an anode connector, such that, if and/or when interfaces  25 A,  25 B are coupled together, the coupled interfaces  25 A,  25 B may electrically couple the heating element  43  and the power supply  12  together. 
     If and/or when interfaces  25 A,  25 B are coupled together, one or more electrical circuits through the first section  15  and the second section  20  may be established (“closed”). The established electrical circuits may include at least the heating element  43 , a control circuitry  11 , the power supply  12 , and a light source  14 . The electrical circuit may include electrical pathways  48 A,  48 B, interfaces  25 A,  25 B, and/or a sensor  13 . 
     Still referring to  FIG. 1A  and  FIG. 1B , the second section  20  includes the second housing  30 ′ extending in a longitudinal direction, the sensor  13 , where the sensor  13  is responsive to air drawn into the second section  20  via an air inlet port  27 A adjacent to a free end or tip end  50  of the e-vaping device  10 , at least one power supply  12 , control circuitry  11 , and light source  14 . The power supply  12  may include a rechargeable battery. The sensor  13  may be one or more of a pressure sensor, a microelectromechanical system (MEMS) sensor, etc. 
     In some example embodiments, the power supply  12  includes a battery arranged in the e-vaping device  10  such that the anode is downstream of the cathode. A connector element included in the electrical pathway  48 B may contact the downstream end of the battery. The heating element  43  may be coupled to the power supply  12  by at least the two spaced apart electrical leads included in the separate, respective electrical pathways  48 A,  48 B, the interfaces  25 A,  25 B, sensor  13 , light source  14 , and/or control circuitry  11 . 
     The power supply  12  may be a Lithium-ion battery or one of its variants, for example a Lithium-ion polymer battery. Alternatively, the power supply  12  may be a nickel-metal hydride battery, a nickel cadmium battery, a lithium-manganese battery, a lithium-cobalt battery or a fuel cell. The e-vaping device  10  may be usable by an adult vaper until the energy in the power supply  12  is depleted or in the case of lithium polymer battery, a minimum voltage cut-off level is achieved. 
     Further, the power supply  12  may be rechargeable and may include circuitry configured to allow the battery to be chargeable by an external charging device. To recharge the e-vaping device  10 , a Universal Serial Bus (USB) charger or other suitable charger assembly may be used. 
     Upon completion of the connection between the first section  15  and the second section  20 , the power supply  12  may be electrically connected with the heating element  43  of the vapor generator  40  upon actuation of the sensor  13 . Air is drawn primarily into the first section  15  through one or more air inlet ports  27 . The one or more air inlet ports  27  may be located along the first and second housings  30  and  30 ′ of the first and second sections  15 ,  20  or at one or more of the coupled interfaces  25 A,  25 B. 
     The sensor  13  may be configured to sense an air pressure drop and initiate application of voltage from the power supply  12  to the heating element  43  of the vapor generator  40 . In addition, the at least one air inlet port  27 A may be located adjacent to the sensor  13 , such that the sensor  13  may sense air flow indicative of vapor being drawn through the outlet end of the e-vaping device  10 . The sensor  13  may activate the power supply  12  and the light source  14 . 
     Referring to  FIG. 1B , the e-vaping device  10  may include the light source  14 . The light source  14  may be configured to glow when the heating element  43  is activated. The light source  14  may include a light emitting diode (LED). As shown, the light source  14  may be located proximate to an outlet end of the second section  20 . For example, the light source  14  may be coupled to the control circuitry  11 . As shown, the light source  14  may be configured to emit light  92  that passes through the opening at the interface between interfaces  25 A,  25 B, such that the light  92  enters the first section  15  through an opening at the tip end of the first section  15 , passes through interior space  44 , and is received into the first housing  30  interior via the tip end portion at the tip end  31 A of the first housing  30 . 
     In some example embodiments, the sensor  13  is configured to generate an output indicative of a magnitude and direction of airflow in the e-vaping device  10 . The control circuitry  11  receives the output of the sensor  13 , and determines if (1) a direction of the airflow in flow communication with the sensor  13  indicates a draw on the outlet-end insert  35  (e.g., a flow through the outlet-end insert  35  towards an exterior of the e-vaping device  10  from the channel  42 ) versus blowing (e.g., a flow through the outlet-end insert  35  from an exterior of the e-vaping device  10  towards the channel  42 ) and (2) the magnitude of the draw (e.g., flow velocity, volumetric flow rate, mass flow rate, some combination thereof, etc.) exceeds a threshold level. If and/or when the control circuitry  11  determines that the direction of the airflow in flow communication with the sensor  13  indicates a draw on the outlet-end insert  35  (e.g., a flow through the outlet-end insert  35  towards an exterior of the e-vaping device  10  from the channel  42 ) versus blowing (e.g., a flow through the outlet-end insert  35  from an exterior of the e-vaping device  10  towards the channel  42 ) and the magnitude of the draw (e.g., flow velocity, volumetric flow rate, mass flow rate, some combination thereof, etc.) exceeds a threshold level, the control circuitry  11  may electrically connect the power supply  12  to the heating element  43 , thereby activating the vapor generator  40 . Namely, the control circuitry  11  may selectively electrically connect the electrical pathways  48 A,  48 B in a closed electrical circuit (e.g., by activating a heater power control circuit included in the control circuitry  11 ) such that the heating element  43  becomes electrically connected to the power supply  12 . In some example embodiments, the sensor  13  may indicate a pressure drop, and the control circuitry  11  may activate the vapor generator  40  in response thereto. 
     In some example embodiments, the control circuitry  11  may include a time-period limiter. In some example embodiments, the control circuitry  11  may include a manually operable switch for an adult vaper to initiate heating. The time-period of the electric current supply to the heating element  43  of the vapor generator  40  may be set or pre-set depending on the amount of pre-vapor formulation desired to be vaporized. In some example embodiments, the sensor  13  may detect a pressure drop and the control circuitry  11  may supply power to the heating element  43  as long as heater activation conditions are met. Such conditions may include one or more of the sensor  13  detecting a pressure drop that at least meets a threshold magnitude, the control circuitry  11  determining that a direction of the airflow in flow communication with the sensor  13  indicates a draw on the outlet-end insert  35  (e.g., a flow through the outlet-end insert  35  towards an exterior of the e-vaping device  10  from the channel  42 ) versus blowing (e.g., a flow through the outlet-end insert  35  from an exterior of the e-vaping device  10  towards the channel  42 ), and the magnitude of the draw (e.g., flow velocity, volumetric flow rate, mass flow rate, some combination thereof, etc.) exceeds a threshold level. 
     In some example embodiments, the control circuitry  11  may include a maximum, time-period limiter. In some example embodiments, the control circuitry  11  may include a manually operable switch for an adult vaper to initiate a vaping. The time-period of the electric current supply to the heating element  43  may be given, or alternatively pre-set (e.g., prior to controlling the supply of electrical power to the heating element  43 ), depending on the amount of pre-vapor formulation desired to be vaporized. In some example embodiments, the control circuitry  11  may control the supply of electrical power to the heating element  43  as long as the sensor  13  detects a pressure drop. 
     Still referring to  FIG. 1B , in some example embodiments, the control circuitry  11  is configured to control the supply of electrical power to the light source  14  to control one or more particular properties of the light  92  emitted by the light source  14 , such that the emitted light  92 , when emitted as emitted light  96 , communicates information based on the one or more particular properties of the emitted light. The one or more particular properties of the light may include a color temperature of the emitted light  92  and/or a brightness of the emitted light  92  and/or a length of time (“period of elapsed time”) that the light  92  is emitted by the light source  14 . As referred to herein, a “color temperature” of emitted light may be referred to as a “color” of the emitted light. 
     The control circuitry  11  may monitor one or more properties associated with the e-vaping device  10 . For example, the control circuitry  11  may determine (“monitor,” “track,” “calculate,” etc.) an amount of pre-vapor formulation held in the reservoir  34 , an amount of electrical energy (“electrical charge”) held in the power supply  12 , a magnitude of generated vapor that is generated by the vapor generator  40  during one or more individual instances of generating the vapor a flow rate of air through at least a portion of the e-vaping device  10 , some combination thereof, or the like. Such properties associated with the e-vaping device  10  may be referred to herein as “e-vaping device properties.” The control circuitry  11  may monitor the one or more e-vaping device properties, based on processing sensor data generated by one or more sensor devices in the e-vaping device  10 , including information received through a communication interface of the e-vaping device  10 . 
     In some example embodiments, the control circuitry  11  may control the supply of electrical power to the light source  14  to control the one or more properties of the light  92  emitted by the light source  14  such that the emitted light  92  has properties that correspond to the one or more e-vaping device properties monitored by the control circuitry  11 . 
     As referred to herein, properties of the light  92  may be the same or substantially the same (e.g., the same within manufacturing tolerances and/or material tolerances) as the properties of the emitted light  96 . The control circuitry  11  may thus enable the e-vaping device  10  to emit an emitted light  96  that has one or more properties corresponding to the one or more e-vaping device properties, such that the e-vaping device  10  may communicate, to an adult vaper observing the outlet end  45  of the first section  15 , information indicating one or more properties of the e-vaping device  10 . 
     In an example, the control circuitry  11  may, based on both determining that electrical power is to be supplied to the heating element  43  to cause vapor to be generated and further determining that one or more monitored e-vaping device properties at least meet one or more threshold values and/or are within one or more ranges, control the supply of electrical power to the light source  14  so that the light source  14  emits light  92  having one or more properties determined by the control circuitry  11  to correspond to the one or more e-vaping device properties. 
     The correspondence (“association,” “relationship,” etc.) between various light properties and various particular e-vaping device properties, including correspondence between particular values and/or ranges of values thereof, may be stored in a look-up table that may be further stored in a memory. The memory may be included in the e-vaping device  10 , including within the control circuitry  11 . The control circuitry may, upon determining a value of an e-vaping device property based on processing data from a sensor device, access the look-up table to determine a corresponding property value of at least one property of light  92  to be emitted by the light source  14 . The control circuitry  11  may further determine one or more corresponding properties of the electrical power to be supplied to the light source  14  to cause the light source  14  to emit light  92  having the at least one property identified in the look-up table. 
     In an example, the control circuitry  11  may be configured to cause the light source  14  to emit light  92  having a particular color temperature and brightness based on vapor being generated by the vapor generator  40 . The color temperature of the emitted light  92 , in a range of color temperatures, may be proportional to an amount of electrical charge held in the power supply  12 . The brightness of the light  92  may be proportional to an amount of pre-vapor formulation held in the reservoir  34 . Thus, the color temperature and brightness of the emitted light  92 , and thus the color temperature and brightness of the emitted light  96 , may communicate information indicating both an amount of electrical charge in the power supply  12  and an amount of pre-vapor formulation held in the reservoir  34 . 
     In another example, the control circuitry  11  may be configured to cause the light source  14  to emit light  92  having a particular color temperature and brightness based on vapor being generated by the vapor generator  40 . The color temperature of the emitted light  92 , in a range of color temperatures, may correspond to a particular flavorant, of a set of flavorants corresponding to separate color temperatures in the range of color temperatures, that is included in the pre-vapor formulation held in the reservoir  34 . The brightness of the light  92  may be proportional to an amount of pre-vapor formulation held in the reservoir  34 . Thus, the color temperature and brightness of the emitted light  92 , and thus the color temperature and brightness of the emitted light  96 , may communicate information indicating both a flavorant associated with the pre-vapor formulation held in the reservoir  34  and an amount of pre-vapor formulation held in the reservoir  34 . 
     In some example embodiments, a property of the light  92  emitted by the light source  14 , and thus the emitted light  96  that is emitted by a surface of the outlet-end insert  35 , may be a period of elapsed time during which the light  92  is emitted by the light source  14 . For example, the control circuitry  11  may be configured to cause the light source  14  to emit light  92  for a particular period of time that is proportional to the amount of electrical charge held in the power supply  12 , an amount of pre-vapor formulation held in the reservoir  34 , some combination thereof, or the like. As used herein, a value that is “proportional” to another value may include various types of relationships between the two values, including “inversely proportional,” “directly proportional,” or the like. 
     In some example embodiments, the control circuitry may, upon determining that vapor is to be generated based on data received from sensor  13 , control a supply of electrical power to both the heating element  43  and the light source  14 , simultaneously or according to a control sequence. As described above, the control circuitry  11  may control the supply of electrical power to the light source  14  to cause the light source  14  to emit light  92  having one or more particular properties that correspond to one or more monitored properties of the e-vaping device  10 . The control circuitry  11  may cause the light source  14  to emit the light  92  for a particular period of time. 
     The control circuitry  11  may monitor the amount of elapsed time that light is emitted by the light source  14 . In some example embodiments, the control circuitry  11  may control the supply of electrical power to the light source  14  to cause the light source  14  to emit a sequence of lights  92 , where each separate instance of emitted light  92  has different properties, according to a control sequence. Thus, the control circuitry  11  may control the light source  14  to emit various instances of light  92  that communicate various instances of information associated with various e-vaping device properties. As referred to herein, a given “instance” of light refers to a particular continuous emission of light having a particular set of properties. 
     The control circuitry  11  may control the light source  14  to emit a first instance of light (“first light”) having one or more particular properties that correspond to one or more property values of a first set of monitored e-vaping device properties. The control circuitry  11  may cause the light source  14  to emit the first light for a particular period of elapsed time, where the particular period of elapsed time may be associated with the first instance of light and/or may be a magnitude of elapsed time determined based on a determined value of one or more monitored e-vaping device properties in the first set of monitored e-vaping device properties. 
     The control circuitry  11  may subsequently control the light source  14  to emit one or more additional instances of light (“one or more additional lights”) having one or more different properties that correspond to one or more additional sets of monitored e-vaping device properties. The control circuitry  11  may cause the light source  14  to emit an additional instance of light for a separate, particular period of elapsed time, where the separate, particular period of elapsed time may be associated with the additional instance of light and/or may be a magnitude of elapsed time determined based on a determined value of one or more monitored e-vaping device properties in the additional set of monitored e-vaping device properties. 
     Thus, the control circuitry  11  may enable the e-vaping device  10  to communicate a relatively large range of information via controlling the properties of light  92  emitted by the light source  14 . 
     As indicated above, the control circuitry  11  may associate each instance of light  92  emitted by the light source  14  in a control sequence with a particular amount of elapsed time (“period of elapsed time”). As noted above, the magnitude of the period of elapsed time associated with a particular instance of emitted light may be controlled based on one or more monitored e-vaping device properties of the e-vaping device  10 , such that even the amount of time during which a particular instance of light  92  is emitted may thus communicate information regarding the one or more monitored properties. 
     Upon controlling the light source  14  to emit a particular instance of light  92  (e.g., light  92  having one or more particular properties), the control circuitry  11  may enable the light source  14  to emit the particular instance of light  92  for the particular period of elapsed time that is associated with the particular instance of light  92 . 
     In response to determining that the particular period of elapsed time associated with an emitted instance of light has elapsed, the control circuitry  11  may control the light source  14  to emit a different instance of light, having different properties (e.g., color temperature and/or brightness) corresponding to a different set of monitored e-vaping device properties of the e-vaping device  10  for a different period of elapsed time associated with the different instance of light. Upon controlling the light source  14  to emit all instances of light in the control sequence for the associated periods of elapsed time, the control circuitry  11  may cause the light source  14  to be deactivated. 
     In an example, based on receiving data from the sensor  13  indicating that vapor is to be generated, the control circuitry  11  may control light source  14  to emit two separate instances of light in sequence, where the first instance of emitted light  92 , emitted for a first period of time that is proportional to the amount of pre-vapor formulation in the reservoir  34 , has a color corresponding to a determined flavorant included in the pre-vapor formulation and has a brightness corresponding to the amount of vapor generated in response to the received data. 
     Continuing the example, upon the determination that the first period of time has elapsed, the control circuitry  11  may control light source  14  to switch from emitting the first instance of light  92  to emitting a second instance of light  92  for a second period of time that is fixed (e.g. a constant value that is independent of any monitored e-vaping device properties), where the second instance of light  92  has a color temperature and brightness that are both proportional with the determined amount of electrical charge in the power supply  12 . In response to a determination that the second period of time has elapsed, the control circuitry  11  may deactivate the light source  14 . 
     To control the supply of electrical power to the heating element  43  and/or the light source  14 , the control circuitry  11  may execute one or more instances of computer-executable program code. The control circuitry  11  may include a processor and a memory. The memory may be a computer-readable storage medium storing computer-executable code. 
     The control circuitry  11  may include processing circuity including, but not limited to, a processor, Central Processing Unit (CPU), a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA), a System-on-Chip (SoC), a programmable logic unit, a microprocessor, or any other device capable of responding to and executing instructions in a defined manner. In some example embodiments, the control circuitry  11  may be at least one of an application-specific integrated circuit (ASIC) and an ASIC chip. 
     The control circuitry  11  may be configured as a special purpose machine by executing computer-readable program code stored on a storage device. The program code may include program or computer-readable instructions, software elements, software modules, data files, data structures, and/or the like, capable of being implemented by one or more hardware devices, such as one or more instances of the control circuitry  11  mentioned above. Examples of program code include both machine code produced by a compiler and higher level program code that is executed using an interpreter. 
     The control circuitry  11  may include one or more storage devices. The one or more storage devices may be tangible or non-transitory computer-readable storage media, such as random access memory (RAM), read only memory (ROM), a permanent mass storage device (such as a disk drive), solid state (e.g., NAND flash) device, and/or any other like data storage mechanism capable of storing and recording data. The one or more storage devices may be configured to store computer programs, program code, instructions, or some combination thereof, for one or more operating systems and/or for implementing the example embodiments described herein. The computer programs, program code, instructions, or some combination thereof, may also be loaded from a separate computer readable storage medium into the one or more storage devices and/or one or more computer processing devices using a drive mechanism. Such separate computer readable storage medium may include a USB flash drive, a memory stick, a Blu-ray/DVD/CD-ROM drive, a memory card, and/or other like computer readable storage media. The computer programs, program code, instructions, or some combination thereof, may be loaded into the one or more storage devices and/or the one or more computer processing devices from a remote data storage device via a network interface, rather than via a local computer readable storage medium. Additionally, the computer programs, program code, instructions, or some combination thereof, may be loaded into the one or more storage devices and/or the one or more processors from a remote computing system that is configured to transfer and/or distribute the computer programs, program code, instructions, or some combination thereof, over a network. The remote computing system may transfer and/or distribute the computer programs, program code, instructions, or some combination thereof, via a wired interface, an air interface, and/or any other like medium. 
     The control circuitry  11  may be a special purpose machine configured to execute the computer-executable code to control the supply of electrical power to the heating element  43  and/or to the light source  14 . Controlling the supply of electrical power to the heating element  43  may be referred to herein interchangeably as activating the heating element  43 . Controlling the supply of electrical power to the light source  14  may be referred to herein interchangeably as activating the light source  14 . 
     As used herein, the term “flavorant” is used to describe a compound or combination of compounds that may provide flavor and/or aroma to an adult vaper. In some example embodiments, a flavorant is configured to interact with at least one adult vaper sensory receptor. A flavorant may be configured to interact with the sensory receptor via at least one of orthonasal stimulation and retronasal stimulation. A flavorant may include one or more volatile flavor substances. 
     The at least one flavorant may include one or more of a natural flavorant or an artificial (“synthetic”) flavorant. The at least one flavorant may include one or more plant extract materials. In some example embodiments, the at least one flavorant is one or more of tobacco flavor, menthol, wintergreen, peppermint, herb flavors, fruit flavors, nut flavors, liquor flavors, and combinations thereof. In some example embodiments, the flavorant is included in a botanical material. A botanical material may include material of one or more plants. A botanical material may include one or more herbs, spices, fruits, roots, leaves, grasses, or the like. For example, a botanical material may include orange rind material and sweetgrass material. In another example, a botanical material may include tobacco material. In some example embodiments, a flavorant that is a tobacco flavor (a “tobacco flavorant”) includes at least one of a synthetic material and a plant extract material. A plant extract material included in a tobacco flavorant may be an extract from one or more tobacco materials. 
     In some example embodiments, the first housing  30  and the second housing  30 ′ may have a generally cylindrical cross-section. In some example embodiments, the first and second housings  30  and  30 ′ may have a generally triangular cross-section along one or more of the first section  15  and the second section  20 . Furthermore, the first and second housings  30  and  30 ′ may have the same or different cross-section shape, or the same or different size. As discussed herein, the first and second housings  30  and  30 ′ may also be referred to as outer housings or main housings. 
     In some example embodiments, the first housing  30  and second housing  30 ′ may be a single tube housing both the first section  15  and the second section  20 , and the entire e-vaping device  10  may be disposable. 
     Pre-vapor formulation, as described herein, is a material or combination of materials that may be transformed into a vapor. For example, the pre-vapor formulation may be a liquid, solid and/or gel formulation including, but not limited to, water, beads, solvents, active ingredients, ethanol, plant extracts, natural or artificial flavors, and/or vapor formers such as glycerin and propylene glycol. The pre-vapor formulation may include those described in U.S. Patent Application Publication No. 2015/0020823 to Lipowicz et al. filed Jul. 16, 2014 and U.S. Patent Application Publication No. 2015/0313275 to Anderson et al. filed Jan. 21, 2015, the entire contents of each of which is incorporated herein by reference thereto. 
     In some example embodiments, the pre-vapor formulation is one or more of propylene glycol, glycerin and combinations thereof. 
     The pre-vapor formulation may include nicotine or may exclude nicotine. The pre-vapor formulation may include one or more tobacco flavors. The pre-vapor formulation may include one or more flavors that are separate from one or more tobacco flavors. 
     In some example embodiments, a pre-vapor formulation that includes nicotine may also include one or more acids. The one or more acids may be one or more of pyruvic acid, formic acid, oxalic acid, glycolic acid, acetic acid, isovaleric acid, valeric acid, propionic acid, octanoic acid, lactic acid, levulinic acid, sorbic acid, malic acid, tartaric acid, succinic acid, citric acid, benzoic acid, oleic acid, aconitic acid, butyric acid, cinnamic acid, decanoic acid, 3,7-dimethyl-6-octenoic acid, 1-glutamic acid, heptanoic acid, hexanoic acid, 3-hexenoic acid, trans-2-hexenoic acid, isobutyric acid, lauric acid, 2-methylbutyric acid, 2-methylvaleric acid, myristic acid, nonanoic acid, palmitic acid, 4-penenoic acid, phenylacetic acid, 3-phenylpropionic acid, hydrochloric acid, phosphoric acid, sulfuric acid and combinations thereof. 
     The reservoir  34 , in some example embodiments, may include a storage medium that may hold the pre-vapor formulation. The storage medium may be a fibrous material including at least one of cotton, polyethylene, polyester, rayon and combinations thereof. The fibers may have a diameter ranging in size from about 6 microns to about 15 microns (e.g., about 8 microns to about 12 microns or about 9 microns to about 11 microns). The storage medium may be a sintered, porous or foamed material. Also, the fibers may be sized to be irrespirable and may have a cross-section that has a Y-shape, cross shape, clover shape or any other suitable shape. If and/or when the reservoir  34  includes a storage medium, the propagation of light through the reservoir  34  may be at least partially inhibited, such that external observation of pre-vapor formulation in the reservoir  34  may be at least partially inhibited and light  92  may be restricted to being emitted to an environment external to the e-vaping device  10 , as emitted light  96 , through a surface of the outlet-end insert  35 . In some example embodiments, the reservoir  34  may include a filled tank lacking any storage medium and containing only pre-vapor formulation. If and/or when the reservoir  34  includes lacks any storage medium, the propagation of light through the reservoir  34  may be at least partially enabled, such that external observation of pre-vapor formulation in the reservoir  34  may be at least partially enabled and at least some light  92  may be emitted to an environment external to the e-vaping device, as emitted light  96 , through at least a portion of the reservoir  34 . For example, at least a portion of the light  92  may be directed through pre-vapor formulation held in the reservoir  34 , and out into the external environment via the first housing  30 , such that the pre-vapor formulation held in the reservoir  34  is illuminated to external observation. 
     The reservoir  34  may be sized and configured to hold enough pre-vapor formulation such that the e-vaping device  10  may be configured for vaping for at least about 1000 seconds. The e-vaping device  10  may be configured to allow each vaping to last a maximum of about 10 seconds. 
     The dispensing interface  41  may include a wick. The dispensing interface  41  may include filaments (or threads) having a capacity to draw the pre-vapor formulation. For example, the dispensing interface  41  may be a wick that is a bundle of glass (or ceramic) filaments, a bundle including a group of windings of glass filaments, etc., all of which arrangements may be capable of drawing pre-vapor formulation via capillary action by interstitial spacings between the filaments. The filaments may be generally aligned in a direction perpendicular (transverse) to the longitudinal axis of the e-vaping device  10 . 
     The dispensing interface  41  may include any suitable material or combination of materials, also referred to herein as wicking materials. Examples of suitable materials may be, but not limited to, glass, ceramic- or graphite-based materials. The dispensing interface  41  may have any suitable capillary drawing action to accommodate pre-vapor formulations having different physical properties such as density, viscosity, surface tension and vapor pressure. 
     In some example embodiments, the heating element  43  may include a wire element. As shown in  FIG. 1B , the heating element  43  may at least partially extend over a tip-end side of the dispensing interface  41  and may at least partially surround an aperture of the conduit  41 A extending through the dispensing interface  41 . The wire element may be a metal wire. In some example embodiments, the wire element may be isolated from direct contact with the dispensing interface  41 . 
     In some example embodiments, the heating element  43  includes a stamped structure, a cut structure, an etched structure, some combination thereof, or the like. A cut structure may be a laser-cut structure, a chemical-cut structure, a mechanically-cut structure, some combination thereof, or the like. An etched structure may be a chemical-etched structure, a laser-etched structure, a mechanically-etched structure, some combination thereof, or the like. 
     The heating element  43  may be formed of (“may at least partially comprise”) any suitable electrically resistive materials. Examples of suitable electrically resistive materials may include, but not limited to, titanium, zirconium, tantalum and metals from the platinum group. Examples of suitable metal alloys include, but not limited to, stainless steel, nickel, cobalt, chromium, aluminum-titanium-zirconium, hafnium, niobium, molybdenum, tantalum, tungsten, tin, gallium, manganese and iron-containing alloys, and super-alloys based on nickel, iron, cobalt, stainless steel. For example, the heating element  43  may be formed of nickel aluminide, a material with a layer of alumina on the surface, iron aluminide and other composite materials, the electrically resistive material may optionally be embedded in, encapsulated or coated with an insulating material or vice-versa, depending on the kinetics of energy transfer and the external physicochemical properties required. The heating element  43  may include at least one material selected from the group consisting of stainless steel, copper, copper alloys, nickel-chromium alloys, super alloys and combinations thereof. In some example embodiments, the heating element  43  may be formed of nickel-chromium alloys or iron-chromium alloys. In some example embodiments, the heating element  43  may be a ceramic heater having an electrically resistive layer on an outside surface thereof. 
     The heating element  43  may heat a pre-vapor formulation in the dispensing interface  41  by thermal conduction. Alternatively, heat from the heating element  43  may be conducted to the pre-vapor formulation by means of a heat conductive element or the heating element  43  may transfer heat to the incoming ambient air that is drawn through the e-vaping device  10  during vaping, which in turn heats the pre-vapor formulation by convection. 
     It should be appreciated that, instead of using the dispensing interface  41 , the vapor generator  40  may include the heating element  43  such that the heating element  43  is a porous material which incorporates a resistance heater formed of a material having a high electrical resistance capable of generating heat quickly. 
     In some example embodiments, the e-vaping device  10  may be about 80 mm to about 110 mm long and about 7 mm to about 8 mm in diameter. For example, in some example embodiments, the e-vaping device  10  may be about 84 mm long and may have a diameter of about 7.8 mm. 
       FIG. 1D  is a longitudinal cross-sectional view of an outlet end of an e-vaping device, according to some example embodiments.  FIG. 1E  is a longitudinal cross-sectional view of a portion of an e-vaping device, according to some example embodiments. 
     Referring to  FIG. 1D , in some example embodiments, the outlet-end insert  35  and the first housing  30  may be integral with each other and thus included in an individual integral element that is the first housing  30 . Thus, as shown in  FIG. 1 , the first housing  30  may extend over the outlet end  45  of the first section  15  and thus may define an outlet end of the reservoir  34  and an outlet end of the channel  42 . As shown in  FIG. 1D , the first housing  30  may further include cavity  35 A and outlet air ports  36  extending from the cavity  35 A to the outlet end  31 B of the first housing  30 , where the outlet end  31 B of the first housing  30  is also common with the outlet-end surface  35 B. Thus, the outlet air ports  36  may be in fluid communication with the channel  42  through the cavity  35 A, and generated vapor that is drawn through the channel  42  may further be drawn out of the e-vaping device  10  through cavity  35 A and one or more outlet air ports  36  in the first housing  30 . 
     Still referring to  FIG. 1D , the first housing  30  may include a cylindrical portion extending along the longitudinal axis of the first section  15  to the outlet end  45 , where the first housing  30  further includes a disc portion through which the one or more outlet air ports  36  extend. Internally-reflected light  94  that is channeled through the cylindrical portion (thickness  30 C) of the first housing  30  between the inner surface  30 A of the first housing  30  and the outer surface  30 B of the first housing  30 , as shown in  FIG. 1D , may propagate through the disc portion of the first housing  30  to the outlet-end surface  35 B at the outlet end  31 B of the first housing  30  to be emitted from the e-vaping device  10  as emitted light  96 . 
     By including the outlet-end insert  35  and the first housing  30  in an individual, integral element, the first section  15  may be configured to reduce the quantity of parts of the first section  15  and may further enable reduced expenditures of time, effort, costs, and/or various resources to assemble and/or maintain at least the first section  15  of the e-vaping device  10 . 
     Referring now to  FIG. 1E , in some example embodiments the tip-end portion  33  of the first housing  30  may be integral with interface  25 A, such that the tip-end portion  33  of the first housing  30  is configured to both receive light  92  into the interior of the first housing  30  and is further configured to connect with interface  25 B to couple the first section  15  to the second section  20 . 
       FIG. 2  is a flowchart illustrating operations that may be performed, according to some example embodiments. The operations shown in  FIG. 2  may be implemented at least partially by any of the example embodiments of the e-vaping device  10  included herein, including any example embodiments of the control circuitry  11 . 
     At S 202 , at least a control circuitry  11  of an e-vaping device  10  may detect at least a threshold amount of air flow in the e-vaping device  10 , based on sensor data generated by sensor  13 . The control circuitry  11  may detect air flow based on air being drawn into the e-vaping device  10  via one or more of the air inlet ports  27  and/or air inlet ports  27 A. 
     At S 204  and S 206 , the control circuitry  11  may control the vapor generator  40 , based on the detection at S 202 , to generate a vapor (S 204 ) and may further control the light source  14  to emit a first instance of light  92  (S 206 ). Operations S 204  and S 206  may be implemented simultaneously or substantially simultaneously (e.g., in parallel). Operations S 204  and S 206  may be implemented in series according to a sequence of operations. 
     Controlling the vapor generator  40  at operation S 204  may include controlling a supply of electrical power from the power supply  12  to the heating element  43  to cause the heating element  43  to generate heat to vaporize at least a portion of the pre-vapor formulation held in the dispensing interface  41 . The supply of electrical power may be controlled to cause a particular amount of electrical power to be supplied to the heating element  43  for a particular period of time, thereby causing a particular amount of vapor to be generated. 
     Controlling the light source  14  at operation S 206  may include causing the light source to emit light  92  having one or more particular properties for a particular period of elapsed time. For example, the light source  14  may be controlled to emit light having a particular brightness and/or color temperature for a particular period of elapsed time. The period of elapsed time may extend from a point in time at which a detected drawing of air through at least a portion of the e-vaping device ceases or drops below a threshold flow value (referred to herein as a cessation of air being drawn through at least the portion of the e-vaping device). The one or more particular properties of the first instance of light may be selected based on one or more values of a set of one or more monitored e-vaping device properties of the e-vaping device  10 . Such one or more e-vaping properties may include a determined amount of pre-vapor formulation held in the reservoir  34 , a determined amount of electrical charge held in the power supply section, and/or a magnitude of generated vapor that is generated by the vapor generator  40  at operation S 204 . 
     As noted above, controlling the light source  14  at operation S 206  may include causing the light source to emit the first light for a first period of elapsed time. The first period of elapsed time may be a period of elapsed time extending from the time at which the light source  14  first emits the first light at operation  206  to a first threshold value of elapsed time. 
     At S 208 , based on a determination that the light source  14  has emitted the first light for at least the first period of elapsed time (e.g., a period of elapsed time extending from the time at which the light source  14  first emits the first light at operation  206  to at least the first threshold value of elapsed time), the control circuitry  11  may make a determination regarding whether an additional instance of light (e.g., light having one or more properties different from the first instance of light) is to be emitted by the light source  14 . If not, at S 216 , then the control circuitry  11  may deactivate the light source  14 . 
     If, at S 212 , a determination is made at S 210  that at least one additional instance of light having one or more properties associated with an additional set of monitored e-vaping device properties is to be emitted by the light source  14 , the control circuitry  11  may control the light source  14  to emit an additional instance of light  92 , having one or more properties different from the first instance of light  92  and corresponding to the additional set of monitored e-vaping device properties, for an additional period of elapsed time. At S 214 , upon a determination that the additional period of elapsed time has elapsed, the control circuitry  11  may either control the light source  14  to emit a further additional instance of light at S 210  and S 212  or may deactivate the light source  14  at S 216 . 
     Example embodiments have been disclosed herein; it should be understood that other variations may be possible. Such variations are not to be regarded as a departure from the spirit and scope of the present disclosure, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.