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(11) | EP 0 100 215 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Cigarettes and methods of manufacture |
| (57) A cigarette is provided which comprises a tobacco rod 1, and an integral axially
aligned substantially cylindrical assembly at the mouth end of the cigarette which
preferably includes a wrapped cylindrical filter plug 7, 8 and tipping paper 2, and
which is provided with means to adjust the air dilution value of the cigarette. The
assembly has first and second ends, which are open to permit the passage of air and
smoke, and at least two openings 6 in addition to the open ends. Means are provided
for rotating one opening relative to the other so that the openings are in varying
degrees of registry to permit varying amounts of air to combine with and dilute the
smoke. In accordance with another aspect of the invention a filter cigarette is provided
which has a wrapped filter plug 202, 203 aligned in end-to-end abutting relationship
with a substantially cylindrical tobacco rod 201. The filter plug and tobacco rod
are circumscribed and joined by a substantially air permeable first layer of tipping
paper 204. Circumscribing the first layer of tipping paper is a second layer of substantially
air impermeable tipping paper 206. The second layer has a circumferentially extending
row of closely spaced perforations 210 intermediate the two ends of the second layer
which divides it into a mouth-end sleeve 207 attached to the first layer at the mouth
end of the cigarette and a second rod-end sleeve 208 detachable from the mouth end
sleeve by rotating the sleeve relative to the first sleeve so that it can move axially
between the mouth-end sleeve and positions along the tobacco rod allowing airto enter
the filter through the exposed portions of the air permeable layers. |