Paper having crossdirectional regions of variable basis weight
AssigneePhilip Morris Incorporated
InventorsJeffery L. Allen, Gordon H. Bokelman, Navin Gautam, David J. Kraske, James L. Myracle, Jr., Robert M. Rogers, Edward B. Sanders
Life of this patent
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Abstract
This invention refers to a paper having crossdirectional regions having increased basis weight. The paper of this invention is especially useful as a wrapping material for a smoking article. The paper may be produced by depositing additional material onto a moving base web in a papermaking machine. The additional material is deposited by means of a rotating drum containing a plurality of slits through which the additional material passes.
Claims42
A nonlaminated cigarette paper comprising a base web portion and a plurality of crossdirectional regions, said base web portion having a basis weight in the range of approximately 25 to 70 grams per meter squared, said crossdirectional regions having a basis weight from 0.01% to about 30% above the basis weight of the base web portion, the crossdirectional regions having a porosity of up to about 10 Coresta, said porosity of said crossdirectional regions being less than a porosity of the base web portion such that a burn rate of a cigarette that incorporates said cigarette paper is less at said crossdirectional regions than at said base web portion.
The nonlaminated cigarette paper of claim 4, wherein said base web comprises cellulosic fiber.
A nonlaminated cigarette paper comprising a base web portion and a plurality of crossdirectional regions, said crossdirectional regions having a basis weight from 0.01% to about 30% above a basis weight of the base web portion and a porosity less than the porosity of the base web portion, such that a burn rate of a cigarette that incorporates said cigarette paper is less at said crossdirectional regions than at said base web portion;
- wherein the base web portion has a porosity of about 25 to about 60 Coresta and the crossdirectional regions have a porosity of up to about 10 Coresta.
A smoking article comprising a tobacco rod overwrapped with a nonlaminated cigarette paper, said cigarette paper comprising a base web portion of cellulosic fiber and a plurality of crossdirectional regions of increased basis weight and decreased porosity, wherein the basis weight of said crossdirectional regions is about 0.01% to about 30% above the basis weight of said base web portion, said crossdirectional regions having a static burn rate less than said base web portion.
A nonlaminated cigarette paper comprising a base web portion and a plurality of crossdirectional regions having a basis weight from 0.01% to about 30% above a basis weight of the base web portion and a porosity less than the porosity of the base web portion, wherein the base web portion has a porosity of about 25 to about 60 Coresta and the crossdirectional regions have a porosity of up to about 10 Coresta, and wherein the crossdirectional region has a thickness of no more than 10% greater than the thickness of the base web portion.
Dependencies are inferred from the claim text.