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US 5,394,895 AGranted
Tipping paper and cigarette using the same
AssigneeJapan Tobacco Inc.
InventorsMotohiko Muramatsu, Kazuko Takeda, Yasuyuki Futamura, Takayoshi Sagawa
Life of this patent
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Abstract
The vented filter cigarette is produced by combining a filter having a highly air-permeable circumferential surface and a tipping paper having a plurality of pores. The tipping paper has an embossment in the area of the pores formed therein. The embossment serves to create a slight gap between the tipping paper and the circumferential surface of the filter, by which the tightness therebetween is loosened. Thus, the filter ventilation is increased, and the variation in the degree of the ventilation can be reduced.
Claims7
A vented filter cigarette comprising:
- a filter having a fiber filter material and a permeable plug wrap paper wrapping the fiber filter material, the plug wrap paper having a Coresta permeability of 1000 or more so as to have a high and substantially uniform permeability overall;
- a tobacco rod;
- and
- tipping paper, having a plurality of pores, connecting the filter and the tobacco rod, the tipping paper being arranged not to reach an end of the tobacco rod which is to be lit;
- wherein said permeable plug wrap paper has a ventilation area which faces said pores and through which dilution air from the pores passes,
- wherein an embossment is formed on the tipping paper in a region including said pores in order to loosen tightness between the tipping paper and the plug wrap paper in said ventilation area to control filter ventilation of the cigarette, and
- wherein said embossment is arranged only around the pores so as not to reach either end of the tipping paper.
4 more elements
Dependencies are inferred from the claim text.