Patent No. EP4337043 (titled "Aerosol Generation Device And Set") was filed by Japan Tobacco on May 9, 2022. The application was issued on Feb 19, 2025.
Aerosol generation device for e-cigarettes and replacement cartridges that improves heating uniformity and aerosol production. The device has a narrowed internal surface in the cartridge receptacle that compresses the airflow path through the cartridge. This reduces cold spots and improves heat distribution when the cartridge is inserted, compared to a straight receptacle. The protrusions narrow the path and force the air to flow through the cartridge material more evenly, improving vaporization.

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