Abstract: A cartridge for an aerosol-generating system is provided, the cartridge including: a liquid storage portion configured to hold a liquid aerosol-forming substrate; and a heater assembly including an electrical heating element configured to heat the liquid aerosol-forming substrate to form an aerosol, a capillary body configured to convey the liquid aerosol-forming substrate to the electrical heating element, the electrical heating element being disposed at a porous end surface of the capillary body, and electrical contacts connected to the electrical heating element, each electrical contact being disposed at opposite sides of the porous end surface, such that the electrical heating element extends between the electrical contacts and forms an electrical connection therebetween. An aerosol-generating system including an aerosol-generating device and the cartridge is also provided.

Abstract: A cartridge for an aerosol-generating system includes a storage container containing a supply of an aerosol-forming substrate, a fluid permeable heating element positioned across an opening in the storage container, a protective cover coupled to the storage container and covering the fluid permeable heating element, at least one air inlet, at least one air outlet, and an airflow path from the at least one air inlet to the at least one air outlet. The protective cover is configured such that a portion of the airflow path is between the protective cover and the fluid permeable heating element.

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: A cartridge for an aerosol-generating system may comprise a liquid storage portion, which includes a housing holding a liquid aerosol-forming substrate. The housing has a first and a second opening. The cartridge may further comprise a first and a second permeable planar heater assembly, wherein the first permeable planar heater assembly is fixed to the housing and extends across the first opening of the housing, and the second permeable planar heater assembly is fixed to the housing and extends across the second opening of the housing. The first and second permeable planar heater assemblies are arranged opposite each other such that they face each other and form an airflow channel in between.

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: A fluid permeable heater assembly for aerosol-generating systems includes an electrically conductive flat filament arrangement and a first contact point and a second contact point for electrically contacting the flat filament arrangement. A longitudinal axis is defined between the first contact point and the second contact point. A center resistance Rc is the electrical resistance between two points situated on the longitudinal axis. One of the two points is situated at a distance from the first contact point equal to about 40 percent and the other one of the two points being situated at a distance from the first contact point equal to about 60 percent.

Abstract: An aerosol-generating system comprises a liquid storage portion comprising a container holding a liquid aerosol-forming substrate and defining an opening, and a heater assembly which extends across the opening along a transverse plane. The heater assembly comprises at least one electrically operated heating element, and a first channel defines a first flow route which brings ambient air into impingement against the heater assembly. In an embodiment a portion of the first channel is arranged orthogonally to the transverse plane such that the at least a portion of the first channel directs ambient air from outside the system to impinge perpendicularly onto a surface portion of the heating element before conveying the ambient air to a downstream end.

Abstract: An electrically conductive flat filament arrangement for a fluid permeable heater assembly for aerosol-generating systems includes a center portion and two side portions. The two side portions are on opposite sides of the center portion. The center portion defines a heating region of the filament arrangement and the side portions define electrical contact regions of the filament arrangement. The center portion and the two side portions each include a plurality of openings. Each plurality of openings defines an open area of the center portion and an open area of each of the two side portions. A percentage of the total area of the center portion including the open area of the center portion is greater than the percentage of the total area of one of the side portions including the open area of the side portion.

Abstract: An electrically conductive flat filament arrangement for a fluid permeable heater assembly for aerosol-generating systems includes a center portion and two side portions. The two side portions are on opposite sides of the center portion. The center portion defines a heating region of the filament arrangement and the side portions define electrical contact regions of the filament arrangement. The center portion and the two side portions each include a plurality of openings. Each plurality of openings defines an open area of the center portion and an open area of each of the two side portions. A percentage of the total area of the center portion including the open area of the center portion is greater than the percentage of the total area of one of the side portions including the open area of the side portion.

Abstract: An electrically operated aerosol-generating system is provided, including: an aerosol-generating device; an aerosol-forming cartridge including at least one aerosol-forming substrate, the aerosol-forming cartridge being at least partially received within the aerosol-generating device; at least one electric heater configured to heat the at least one aerosol-forming substrate; at least one air inlet and at least one air outlet; and an air flow channel extending between the at least one air inlet and the at least one air outlet, the air flow channel being in fluid communication with the aerosol-forming substrate, the air flow channel having an internal wall surface on which one or more flow disturbing devices are disposed, the flow disturbing devices being arranged to create a turbulent boundary layer in a flow of air drawn through the air flow channel.

Abstract: An aerosol-forming substrate is provided for use with an inductive heating device, including: a solid material to release volatile compounds to form an aerosol upon heating of the substrate, a first susceptor material to heat the substrate and having a first Curie-temperature and being arranged in thermal proximity of the solid material, and a second susceptor material having a second Curie-temperature and being arranged in thermal proximity of the solid material, the first Curie-temperature being lower than the second Curie-temperature, and the second Curie-temperature defining a maximum heating temperature of the first and second materials, the first and second materials being arranged in heaped formation at different locations within the substrate, one of the first and second susceptor materials being arranged in a central region of the substrate and the respective other one of the first and second susceptor materials is arranged in peripheral regions of the substrate.

Abstract: A cartridge for an aerosol-generating system includes a storage container containing a supply of an aerosol-forming substrate, a fluid permeable heating element positioned across an opening in the storage container, a protective cover coupled to the storage container and covering the fluid permeable heating element, at least one air inlet, at least one air outlet, and an airflow path from the at least one air inlet to the at least one air outlet. The protective cover is configured such that a portion of the airflow path is between the protective cover and the fluid permeable heating element.

Abstract: A cartridge for an aerosol-generating system may comprise a liquid storage portion, which includes a housing holding a liquid aerosol-forming substrate. The housing has a first and a second opening. The cartridge may further comprise a first and a second permeable planar heater assembly, wherein the first permeable planar heater assembly is fixed to the housing and extends across the first opening of the housing, and the second permeable planar heater assembly is fixed to the housing and extends across the second opening of the housing. The first and second permeable planar heater assemblies are arranged opposite each other such that they face each other and form an airflow channel in between.

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: Aerosol-generating system (1000) comprising an aerosol-generating device (1100) comprising a heating element (1102), and a cartridge (1200) comprising a housing (1202), a wicking element (1204), and a biasing means (1206). The cartridge is engageable with, and disengageable from, the device. When the cartridge is not engaged with the device, the wicking element is in a disengaged wicking element position and is not in contact with the heating element. When the cartridge is engaged with the device, the wicking element is in an engaged wicking element position, different to the disengaged wicking element position relative to the housing, and is in contact with the heating element, and the biasing means biases the wicking element towards the disengaged wicking element position such that the wicking element applies a force to the heating element in a force direction non-parallel with the engagement direction.

Abstract: A fluid permeable heater assembly for aerosol-generating systems includes an electrically conductive flat filament arrangement and a first contact point and a second contact point for electrically contacting the flat filament arrangement. A longitudinal axis is defined between the first contact point and the second contact point. A center resistance Rc is the electrical resistance between two points situated on the longitudinal axis. One of the two points is situated at a distance from the first contact point equal to about 40 percent and the other one of the two points being situated at a distance from the first contact point equal to about 60 percent.

Abstract: An aerosol-generating device is provided, including an air inlet and outlet; an air flow passage extending between the inlet and the outlet; a heating element to heat an aerosol-forming substrate; a sensor assembly in communication with the passage to measure one or both of a flow rate and a pressure level within the air flow passage; and a controller coupled to the sensor assembly to control a supply of power to the heating element, receive data from the sensor assembly and record when a user puffs on the device, and assign a puff number to each puff recorded by the controller, an amount of power supplied for a given puff being dependent on the puff number of the given puff, and the device being configured such that the puff number resets to zero after a predefined amount of time has passed since a certain numbered puff occurred.

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 cartridge for an aerosol-generating system is provided, the cartridge containing a nicotine source including a liquid nicotine formulation, the liquid nicotine formulation including glycerine in an amount of at least 10 percent by weight and nicotine, in which a ratio by weight of nicotine to glycerine in the liquid nicotine formulation is between about 3:2 and about 9:1. 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 cartridge.

Abstract: An inductive heating assembly is 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 including 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. An aerosol-generating device and an aerosol-generating system include the inductive heating assembly.