Patent No. EP4307941 (titled "Aerosol-Generating Device With Venting Means") was filed by Philip Morris on Mar 18, 2022. The application was issued on May 7, 2025.
Aerosol-generating device for heating aerosol-generating articles like tobacco rods or capsules without pressure buildup due to heating. The device has a sealed housing compartment with a heating element inside. To prevent pressure increase due to heated gas expansion, a venting membrane allows gas flow between the sealed compartment and outside. This allows compensating for heated gas expansion without allowing water or dust ingress.

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