Smoking article comprising an airflow directing element
US9918494B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2013 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Feb 20, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D1/22
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A smoking article is provided, having a mouth end and a distal end, including a heat source; an aerosol-forming substrate; an airflow directing element including an air-permeable segment downstream of the substrate and defining an airflow pathway; and at least one air inlet for drawing air into the segment, wherein the pathway includes a first portion extending from the inlet towards the substrate and a second portion extending from the substrate towards the mouth end, wherein the first portion is defined by a low resistance-to-draw portion of the segment that extends from proximate to the inlet to an upstream end of the segment, and the segment further includes a high resistance-to-draw portion that extends from proximate to the inlet to a downstream end of the segment, and the ratio of the resistance-to-draw of the high portion to the low portion is higher than 1:1 and lower than 50:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.