E-vaping device, method of controlling resistance-to-draw (RTD) for the e-vaping device and method of establishing a desired RTD

摘要

The e-vaping device includes a housing, the housing defining one or more inlets, a power source, and a cartridge. The cartridge includes a reservoir containing a pre-vapor formulation. A heater and wick arrangement is in fluid communication with the reservoir. An annular seal is in fluid communication with the one or more inlets. The annular seal defines a first air passage. A flow restrictor is held by the annular seal. The flow restrictor defines a second air passage, the second air passage being configured to provide a desired resistance-to-draw (RTD) for the e-vaping device. A combined airflow cross-sectional area of the one or more inlets is greater than an airflow cross-sectional area of the second air passage. The flow restrictor is made from a first material that is harder than a second material for the annular seal.