Method Of Manufacturing An Electrical Heater

What is this patent about?

'291 is related to the field of smoking systems, specifically those employing electrical heating of a replaceable cigarette within a reusable lighter. The background acknowledges prior art electrical smoking articles, highlighting issues such as disposable heating elements, repeated electrical connections, and aerosol condensation on reusable heating elements. The invention aims to improve upon these designs.

The underlying idea behind '291 is to create a smoking system where a replaceable cigarette containing tobacco flavor material is heated by electrical elements in a reusable lighter. A key aspect is the design of the cigarette and lighter to promote transverse airflow into the cigarette's cavity. This airflow pattern is intended to enhance aerosol and flavor delivery while minimizing condensation of residual vapor within the system.

The claims of '291 focus on a cigarette for use in a smoking system, comprising a carrier with a cavity containing tobacco flavor material. The carrier and flavor material are designed to allow transverse airflow into the cavity, enabling the generation of a flavored tobacco response when heated. The claims also cover a lighter with a heater fixture that receives the cigarette and provides transverse airflow, along with electrical heater elements and activation means.

In practice, the cigarette is inserted into the lighter, where electrical heating elements surrounding the cigarette's cavity heat the tobacco flavor material. When the smoker draws on the cigarette, air is pulled transversely through the tobacco web and into the cavity, carrying the generated aerosol to the smoker. The transverse airflow is achieved through a combination of air-permeable materials in the cigarette and specifically designed air passages in the lighter.

This design differentiates itself from prior approaches by optimizing airflow patterns to improve aerosol delivery and reduce condensation. Unlike systems with longitudinal airflow, the transverse airflow ensures efficient removal of aerosol from the cavity. The use of reusable heating elements and a replaceable cigarette minimizes waste, while the airflow design reduces maintenance by preventing aerosol buildup on the lighter's internal components. The serpentine shape of the heating elements increases electrical resistance without increasing the size of the lighter.