A - Human Necessities – 24 – D
Patent
A - Human Necessities
24
D
131/21
A24D 3/00 (2006.01) A24D 3/04 (2006.01)
Patent
CA 1200732
ABSTRACT The invention concerns a smoking-article ventilated filter element, comprising a plug of fibrous filtration material wrapped in a wrapper of which at least a portion extending to an end of said element has been removed by the action of heat on moving said element and a heated means relatively to and in contact with each other. The removal of wrapper may expose filtration material underlying said wrapper or a further intermediate wrapper, if present. The first named wrapper may be of a material of a thermoplastic character or comprising a proportion of thermoplastic fibres. The invention also concerns a smoking article comprising a rod of smoking-material, a filter-plug element and a tipping wrapper serving to interattach said rod and plug element, which element comprises fibrous filtration material wrapped in a wrapper of which at least a portion extending to the mouth end of said element has been removed in the aforesaid matter to provide ventilation air-distribution channel means bounded by said tipping wrapper and Opening at said mouth end, and said tipping wrapper permitting ingress of ventilation air into said channel means upstream of said mouth end. The channel means may be constituted by at least one groove extending parallel to the axis of the element or helically and the tipping wrapper may be provided with a ring of spaced ventilation perforations disposed to communicate with said grooves at an upstream region thereof. The channel means may be extended from an annular groove. If there is a further intermediate wrapper, at least a portion thereof may have been removed by the action of heat. The further wrapper may be of substantially zero air permeability.. Two said channel means may follow helical intersecting paths with intermediate portions of wrapper material bonded to underlying filtration material.
434683
Brown & Williamson Tobacco Corporation
Mitches & Co.
LandOfFree
Smoking article filters does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Smoking article filters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Smoking article filters will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1313966