Abstract: A formulation for an aerosol-generating system is provided, the formulation including: one or more aerosol formers; and one or more polymers selected from the group consisting of: polyvinyl acetate, polyvinyl alcohol, polyethylene glycol, polyglycolic acid, polylactic acid, polydioxanone, polycaprolactone, polyethylene, polypropylene glycol, and starch, in which the formulation has a melting point of between 100 degrees Celsius and 300 degrees Celsius. An aerosol-generating article for the aerosol-generating system, and an aerosol-generating system, are also provided.

Abstract: An aerosol-generating device includes a housing having a first end defining a mouthpiece, a second end, and a cavity defined between the first end and the second end. The device also includes a reservoir within the cavity. The reservoir is configured to store a liquid aerosol-forming substrate. The device also includes an atomizer and a valve within the mouthpiece of the housing. The valve has a first side and an second side. The second side of the valve includes a hydrophilic coating, a hydrophobic coating, or both a hydrophilic coating and a hydrophobic coating.

Abstract: An aerosol-generating device includes a housing having a first end defining a mouthpiece, a second end, and a cavity defined between the first end and the second end. The device also includes a reservoir within the cavity. The reservoir is configured to store a liquid aerosol-forming substrate. The device also includes an atomizer and a valve within the mouthpiece of the housing. The valve has a first side and an second side. The second side of the valve includes a hydrophilic coating, a hydrophobic coating, or both a hydrophilic coating and a hydrophobic coating.

Abstract: A nicotine formulation for an aerosol-generating system is provided, the nicotine formulation including: one or more water-miscible polyhydric alcohols, the nicotine formulation having a water-miscible polyhydric alcohol content of greater than or equal to about 40 percent by weight, the nicotine formulation being solid at 25° C. or having a viscosity at 25° C. of greater than or equal to about 100 Pa·s, the one or more water-miscible polyhydric alcohols including glycerine and propylene glycol, and a ratio of the weight percent glycerine content to the weight percent propylene glycol content of the nicotine formulation is greater than or equal to about 1.5. An aerosol-generating article and an aerosol-generating system are also provided.

Abstract: A nicotine formulation for an aerosol-generating system is provided, the nicotine formulation including: one or more water-miscible polyhydric alcohols; one or more metal salts; and one or more organic acids, the nicotine formulation having a metal salt content of greater than or equal to about 0.5 percent by weight, the one or more metal salts being selected from the group consisting of metal benzoates, metal cinnamates, metal cycloheptanecarboxylates, metal levulinates, metal propanoates, metal stearates, and metal undecanoates, and the nicotine formulation having an organic acid content of between about 0.5 percent and about 4 percent by weight. An aerosol-generating article and an aerosol-generating system are also provided.

Abstract: A liquid nicotine formulation for an aerosol-generating system is provided, the nicotine formulation including: one or more water-miscible polyhydric alcohols, the nicotine formulation having a water-miscible polyhydric alcohol content of greater than or equal to about 5 percent by weight; and one or more low molar mass metal salts, the one or more low molar mass metal salts being selected from the group consisting of metal cinnamates, metal cycloheptanecarboxylates, metal levulinates, metal propanoates, metal stearates, and metal undecanoates. An aerosol-generating article and an aerosol-generating system are also provided.

Abstract: There is provided a susceptor assembly configured to inductively heat an aerosol-forming substrate under influence of an alternating magnetic field, the susceptor assembly including a first susceptor including a first susceptor material and a second susceptor including a second susceptor material, the first and the second susceptor materials being chosen such that during pre-heating of the susceptor assembly starting at room temperature a resistance-over-temperature profile of the susceptor assembly has a minimum value of resistance in a temperature range of ±5 degree Celsius around a Curie temperature of the second susceptor material. There is also provided an inductive heating assembly, an aerosol-generating device, and an aerosol-generating system including the susceptor assembly.

Abstract: An aerosol-generating article is provided, including: a fluid guide having proximal and distal ends, and an inner longitudinal region including an inner longitudinal passageway between the distal end and the proximal end thereof, such that fluid can travel from the distal end to the proximal end, the fluid guide including a barrier between the inner and outer longitudinal passageways; a tubular element including a gel or a porous medium or a thread loaded or any combination, the gel or the medium or the thread or the combination includes an active agent, the tubular element having proximal and distal ends and disposed to a distal side of the fluid guide; an aperture to allow fluid to pass to the tubular element and exit the article at the proximal end; a combustible heat source at the distal end of the article; and a cavity between the fluid guide and the tubular element.

Abstract: A heater assembly (300) for an aerosol-generating system, the heater assembly comprising: a fluid permeable heater (322) for heating a liquid aerosol-forming substrate to form an aerosol; a porous member (324) for conveying liquid aerosol-forming substrate to the fluid permeable heater, wherein the fluid permeable heater is deposited on to a porous outer surface (324a) of the porous member, the fluid permeable heater comprising: a first layer (326) of deposited electrically conductive material; a second layer (328) of deposited electrically conductive material, wherein the electrical conductivity of the second layer is greater than the electrical conductivity of the first layer such that the second layer modifies the electrical resistance of the fluid permeable heater to a required resistance.

Abstract: There is provided an inductively heating aerosol-generating device configured to generate an aerosol by heating an aerosol-forming substrate, the device including a receiving cavity configured to receive the aerosol-forming substrate; an induction source configured to generate an alternating electromagnetic field; and a susceptor assembly configured and arranged to inductively heat the aerosol-forming substrate within the receiving cavity under influence of the alternating magnetic field generated by the induction source, the susceptor assembly including a first susceptor and a second susceptor, the first susceptor including a first susceptor material having a positive temperature coefficient of resistance, and the second susceptor including a second ferromagnetic or ferrimagnetic susceptor material having a negative temperature coefficient of resistance.

Abstract: There is provided an inductive heating assembly configured to inductively heat an aerosol-forming substrate to a pre-determined operating temperature, the heating assembly including an induction source configured to generate an alternating electromagnetic field; and a susceptor assembly configured to inductively heat the aerosol-forming substrate under influence of the alternating magnetic field generated by the induction source, the susceptor assembly including a first susceptor comprising a first susceptor material and a second susceptor including a second susceptor material having a Curie temperature at least 50 degrees Celsius below an operating temperature of the heating assembly. There is also provided an aerosol-generating device and an aerosol-generating system including the inductive heating assembly.

Abstract: A liquid supply system for use with an aerosol-generating device, the liquid supply system comprising a liquid retention material (136), a liquid flow channel extending from the liquid retention material and a barrier (125) disposed in the liquid flow channel, the barrier having a threshold temperature between 60° C. and 120° C., wherein the barrier is impermeable to liquid below its threshold temperature and the barrier becomes reversibly permeable to liquid above the threshold temperature.

Abstract: There is provided an inductively heatable aerosol-generating article, including an aerosol-forming substrate; and a susceptor assembly configured to inductively heat the aerosol-forming substrate under influence of an alternating magnetic field, the susceptor assembly including a first susceptor and a second susceptor, the first susceptor including a first susceptor material having a positive temperature coefficient of resistance, and the second susceptor including a second ferromagnetic or ferrimagnetic susceptor material having a negative temperature coefficient of resistance. There is also provided an aerosol-generating system including the aerosol-generating article and an aerosol-generating device for the aerosol-generating article.

Abstract: There is provided an inductive heating assembly to inductively heat an aerosol-forming substrate to an operating temperature, the assembly including an induction source connected to a DC power supply to generate an alternating electromagnetic field to inductively heat a susceptor assembly including a first susceptor and a second susceptor having a Curie temperature below the operating temperature, and a controller operatively connected to the induction source and the DC power supply, to determine an actual apparent resistance of the susceptor assembly indicative of the actual temperature of the susceptor assembly, to determine a minimum value of the apparent resistance occurring during pre-heating of the susceptor assembly, and to control operation of the induction source such that the actual apparent resistance corresponds to the determined minimum value of the apparent resistance plus a pre-determined offset value of the apparent resistance to control heating of the substrate to the operating temperature.

Abstract: An aerosol-generating system is provided, including: a cartridge assembly including a cartridge having an upstream end and a downstream end, and a ventilation air inlet positioned downstream of the cartridge; and an aerosol-generating device including a housing defining a device cavity configured to receive an upstream end of the cartridge assembly, an electric heater configured to heat the cartridge when the cartridge assembly is received within the device cavity, a power supply, and a controller configured to control a supply of electrical power from the power supply to the electric heater, the system being configured so that, when the upstream end of the cartridge assembly is received within the device cavity, the ventilation air inlet is positioned within the device cavity and a portion of an internal surface of the device cavity overlying the ventilation air inlet is spaced apart from the cartridge assembly.

Abstract: An aerosol-generating device is provided, including a heater assembly including at least one heating element; an aerosol-forming substrate proximate to the assembly and including a liquid mixture including nicotine and a first aerosol-former having a boiling temperature higher than nicotine; a power supply to supply power to the assembly to generate an aerosol from the substrate; a mouthpiece to draw aerosol out of the device; and control circuitry to control the supply of power to the assembly, supply a first power to the element or to supply a power sufficient to maintain the element at a first temperature or first temperature range, between user puffs, and supply a second power to the element being higher than the first power or to raise a temperature of the element above the first temperature or the first temperature range, during user puffs, to provide preferential evaporation of nicotine over the first aerosol former.

Abstract: A liquid supply system for use with aerosol-generating devices includes a liquid retention material 136, a liquid flow channel extending from the liquid retention material and a barrier 125 disposed in the liquid flow channel, the barrier having a degradation temperature between 60° C. and 130° C.

Abstract: An aerosol generating system includes, a body defining a cavity having a cavity opening, an aerosol-forming substrate disposed in the cavity, a heating element disposed proximate to the cavity opening, and a controller configured to detect contact of the aerosol-forming substrate with the heating element.

Abstract: A cartridge for an aerosol-generating system is provided, the cartridge including: a first compartment having a first air inlet and a first air outlet, and containing a nicotine source including a first carrier material impregnated with nicotine; and a second compartment having a second air inlet and a second air outlet, and containing an acid source including a second carrier material impregnated with an acid, one of the first and the second compartments including a pair of susceptor elements being arranged in contact with the first and the second carrier materials, respectively, within the first and the second compartments, respectively, and the first and the second carrier materials being respectively arranged between the pair of susceptor elements.

Abstract: There is provided a cartridge (100) for use in an aerosol-generating system (10) for the generation of an aerosol comprising nicotine salt particles. The cartridge (100) comprises a first compartment (110) containing a nicotine source (210) comprising a first carrier material (211) impregnated with nicotine, the first compartment (110) having a first air inlet (132) and a first air outlet (133). The first compartment (110) defines a first airflow path (217) extending across a first surface (213) of the first carrier material (211) between the first air inlet (132) and the first air outlet (133). The first compartment (110) has a width (115) in a direction perpendicular to the first airflow path (217). The cartridge (100) also comprises a second compartment (120) containing an acid source (220) comprising a second carrier material (221) impregnated with an acid, the second compartment (120) having a second air inlet (134) and a second air outlet (135).