Japan Tobacco Inc.

Takeo Tsutsumi

Keigo Miura

Takaaki Matsufuji

Satoshi Ishikawa

Kaoru Inoue

Makoto Sato

Sadayoshi Matsuura

Tetsuya Motodamari

Fumio Sashide

Takashi Kominami

Satoshi Kitao

Ken Uyama

Narumi Akiyama

A low ignition propensity cigarette according to the invention includes a high-density region formed in the center of the paper tube and containing normal shred tobacco filled to be a filling density of 0.15 to 0.35 g/cm, for example 0.25 g/cm, and a low density region formed between the paper tube and the high-density region and containing expanded shred tobacco filled to a filling density of 0.05 to 0.15 g/cm, for example 0.14 g/cm. The thickness of the low-density region defined between the paper tube and the high-density region is in the range of 1 to 3 mm.

Low ignition propensity cigarette

A cigarette comprises a tobacco section including a columnar tobacco filler material and at least one cellulose-based wrapping paper sheet for wrapping the outer circumferential surface of the columnar tobacco filler material. The outermost wrapping paper sheet among the wrapping paper sheets has a thermal conductivity not lower than 0.5 W&#xb7;K&#xb7;m.

Cigarette

Wrapper paper for a smoking article carries 1 g/mto 15 g/mof a burn adjusting agent and 1 g/mto 30 g/mof a calcium phosphate-based compound in the wrapper paper.

Wrapper paper for smoking articles

A low fire-spreading cigarette has a tobacco section including a columnar tobacco filler material, an inside wrapper paper sheer wrapping the outer circumferential surface of the columnar tobacco filler material and an outside wrapper paper sheet wrapping the outer circumferential surface of the inside wrapper paper sheet. The heat conductivity of the inside wrapper is 0.5 W&#xb7;K&#xb7;mor more and the heat conductivity of the outside wrapper paper sheet is less than 0.5 W&#xb7;K&#xb7;m.

Low fire-spreading cigarette

A smoking article is manufactured through supplying a tobacco filler material onto a tobacco wrapping paper sheet that is transferred, wrapping the tobacco filler material supplied onto the tobacco wrapping paper sheet with the tobacco wrapping paper sheet so as to prepare a rod body, and cutting the rod body into a plurality of tobacco rods each having a prescribed length. The tobacco filler material contains at least 20% by weight of expanded tobacco material. The tobacco wrapping paper sheet is coated with the burn adjusting agent during transfer of the tobacco wrapping paper sheet.

Growing community of inventors

Yokohama, Japan

Takeo Tsutsumi