Abstract: A cartridge includes a first compartment having a first air inlet and outlet and containing a nicotine source comprising a first carrier material (i) impregnated with nicotine, and (ii) defining a first airflow channel extending therethrough, which defines a first airflow path extending along the first airflow channel between the first air inlet and outlet. The cartridge includes a second compartment having a second air inlet and outlet and containing an acid source comprising a second carrier material (i) impregnated with an acid, and (ii) defining a second airflow channel extending therethrough, which defines a second airflow path extending along the second airflow channel between the second air inlet and outlet. The first and second compartments are arranged in parallel within the cartridge. The cross-sectional area of at least one of the first and second airflow channels varies in a direction along the first or second airflow path.

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 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 (220) having a second air inlet (134) and a second air outlet (135).

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 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: There is provided aerosol-generating system (200) comprising a cartridge (100). The cartridge comprises a heater assembly comprising at least four individually activatable heating elements (116, 118 . . . 140) arranged in an array. There is an aerosol-forming substrate on each of the heating elements. The system also comprises an aerosol-generating device (201) configured to engage the cartridge. The aerosol-generating device comprises a power supply (206) and control circuitry (212). The control circuitry is configured to control a supply of power from the power supply to each of the heating elements to generate an aerosol. The control circuitry is configured to activate the heating elements sequentially such that no two spatially adjacent heating elements are activated consecutively.

Abstract: A cartridge for an aerosol-generating system is provided, the cartridge including: a first compartment containing an alkaloid source, the alkaloid source including a liquid alkaloid formulation having a polyhydric alcohol content of at least about 10 percent by weight and an alkaloid content of at least about 10 percent by weight; and a second compartment containing an acid source. An aerosol-generating system is also provided, including: the cartridge; and an aerosol-generating device including a housing defining a device cavity configured to receive at least a portion of the cartridge, and a heating element configured to heat the first compartment and the second compartment of the cartridge.

Abstract: An aerosol-generating device is provided, including: an outer housing; a heater configured to heat an aerosol-forming substrate; and a plurality of layers of thermal insulation arranged around at least a part of the heater, the plurality of layers of thermal insulation including a first thermal insulation layer, a second thermal insulation layer, a radiation reflector layer being arranged between the first and the second thermal insulation layers, and a heat spreader layer including the outer housing of the aerosol-generating device. An aerosol-generating system is also provided, including the aerosol-generating device and an aerosol-generating article including an aerosol-generating substrate.

Abstract: A cartridge for use in an aerosol-generating system, the cartridge comprising: a first compartment having a first air inlet and a first air outlet, the first compartment containing a nicotine source; and a second compartment having a second air inlet and a second air outlet, the second compartment containing an acid source; wherein the first compartment comprises a first air flow channel extending from the first air inlet, or the first air outlet, longitudinally along at least a portion of the first compartment, wherein the first air flow channel is adjacent to and in fluid communication with the nicotine source; or wherein the second compartment comprises a second air flow channel extending from the second air inlet, or the second air outlet, longitudinally along at least a portion of the second compartment, wherein the second air flow channel is adjacent to and in fluid communication with the acid source; or wherein the first compartment comprises a first air flow channel extending from the first air inlet,

Abstract: A cartridge (1) for an aerosol generating device, comprising a first cavity (13) containing a nicotine source and a second cavity (14) containing a lactic acid source, the first cavity and the second cavity defining an inner space between the cavities and an outer periphery of the cavities; and a susceptor comprising one or more susceptor elements, wherein the susceptor is arranged such that the susceptor is partly positioned in the inner space (16) between the cavities, and partly positioned in the outer periphery of the cavities, the outer periphery of the cavities being a space between the cavity walls and the cartridge walls.

Abstract: A reclosable cartridge assembly (10) for use in an aerosol-generating system comprises: a cartridge (12) extending longitudinally between end walls (22, 26); a housing (30, 32) enclosing the cartridge (12) and comprising: an upstream portion with an end wall (22) comprising an opening (42); and a downstream housing portion (32) with an end wall comprising an opening (44). One of the housing portions (30, 32) is rotatably fitted onto the cartridge (12). One of the cartridge end walls (22, 26) comprises a rupturable portion (38, 40) separable from the remainder of the end wall to expose an opening (42, 44) in the end wall. The rotatable housing portion (30, 32) is adapted to engage the rupturable portion (38, 40) such that, upon rotation from a storage position to a dispensing position, the housing portion (30, 32) breaks off the rupturable portion (38, 40) and exposes the opening (42, 44) in the end wall.

Abstract: There is provided a cartridge assembly (10) for use in an aerosol-generating system, the cartridge assembly comprising: a cartridge (12) comprising at least a first compartment (18) extending along a longitudinal axis, the first compartment comprising an aerosol-generating compound and being sealed at a first end by a first frangible barrier (22) extending in respective planes transverse to the longitudinal axis; and at least a first piercing member (38) configured to rupture the first frangible barrier (22). The first piercing member (38) comprises: a first piercing body (40) having a cross-sectional surface area at least about 40 percent of a cross-sectional area of the at least one compartment (19); and a first channel (381, 382) extending parallel to the longitudinal axis of the cartridge through the first piercing body (40), the first channel (381, 382) having an inlet and an outlet.

Abstract: A heater assembly is provided for an aerosol-generating system, the heater assembly including: a fluid permeable heating element configured to heat a liquid aerosol-forming substrate to form an aerosol, the fluid permeable heating element including a plurality of apertures configured to allow fluid to permeate through the fluid permeable heating element; and a transport material including a plurality of channels configured to convey a liquid aerosol-forming substrate to the plurality of apertures of the fluid permeable heating element, the transport material including a ceramic, which is deposited directly on to a fluid permeable surface of the fluid permeable heating element, and for over 50 percent of the apertures of the fluid permeable heating element, the transport material further includes a corresponding channel configured to convey liquid aerosol-forming substrate to its respective aperture.

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: An aerosol-generating article is provided for producing an inhalable aerosol upon heating, the aerosol-generating article including: an aerosol-forming substrate including a gel composition, the gel composition including at least one gelling agent, at least one of an alkaloid compound and a cannabinoid compound, and an aerosol former; an upstream element upstream of the aerosol-forming substrate; and a recess extending from an upstream end of the aerosol-generating article, through the upstream element, and through at least a portion of the aerosol-forming substrate, in which a longitudinal inner surface of the recess is provided with a wrapper.

Abstract: An aerosol-generating device is provided, including: a heating element to heat an aerosol-generating article to generate an aerosol; and a cleaning apparatus arranged to cooperate with the heating element and to clean a surface of the heating element, in which the cleaning unit includes at least one piezoelectric element, and in which the piezoelectric element is configured to generate cold plasma to clean the surface of the heating element. A method for cleaning a heating element of an aerosol-generating device, and a method for manufacturing an aerosol-generating device, are also provided.

Abstract: A heater is provided for heating an aerosol-forming substrate, the heater including: a heating element to heat the aerosol-forming substrate, the heating element including at least one positive temperature coefficient (PTC) thermistor, the PTC thermistor being configured to be supplied with an electric current so as to heat the PTC thermistor, in which a resistance of the PTC thermistor increases when a temperature of the PTC thermistor increases within a stabilised temperature range, a lower end of the stabilised temperature range being, when a constant voltage is applied to the PTC thermistor, a reference temperature at which the resistance of the PTC thermistor is twice a value of a minimum resistance of the PTC thermistor, and in which the reference temperature is between about 100° C. and about 350° C. when a constant voltage of 3.3V is applied to the PTC thermistor.

Abstract: A cartridge for an aerosol-generating system is provided, the cartridge including: a porous ceramic body having a porosity of between 30% and 65%; and a mesh heater engaged with the porous ceramic body, the mesh heater including a plurality of apertures, each aperture having a dimension between 50 microns and 200 microns, in which the mesh heater is a hybrid mesh heater including a network of wires and fibres, the fibres having a different material composition from the wires. An aerosol-generating system, including an aerosol-generating device and the cartridge, is also provided.

Abstract: A formulation for an aerosol-generating system is provided, the formulation including: one or more aerosol formers; one or more metal salts; and one or more polymeric thickening agents, in which the formulation has a polymeric thickening agent content of greater than or equal to about 0.5 percent by weight, and in which the one or more metal salts include one or more metal stearates. An aerosol-generating article for the aerosol-generating system, and an aerosol-generating system, are also provided.

Abstract: An aerosol-generating article for an aerosol-generating system is provided, the article including: a storage portion having an outlet; an aerosol-forming substrate contained within the storage portion; and a vaporisable barrier to seal the outlet, in which the barrier includes one or more polymers, has a polymer content of greater than or equal to 1 percent by weight, is configured to be vaporised during a first heating cycle of the article during first use of the article in the system, further includes one or more metal salts, and the salts are selected from the group consisting of metal alginates, metal benzoates, metal cinnamates, metal cycloheptanecarboxylates, metal levulinates, metal propanoates, metal stearates, and metal undecanoates. An aerosol-generating system, and a method of manufacturing an aerosol-generating article, are also provided.