Wrapper for smoking article
Patent 4984589 Issued on January 15, 1991. Estimated Expiration Date: 
November 30, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 30, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References3633589 InventorAssigneeApplicationNo. 444036 filed on 11/30/1989US Classes:131/365, Wrapper or binder131/360Cigar or cigaretteExaminersPrimary: Millin, V.Attorney, Agent or FirmForeign Patent References
International ClassA24D 001/02Foreign Application Priority Data1988-11-30 DEAbstractA cellulose wrapper for a smoking article includes a cover layer and at least one inner layer. The cover layer has an area weight of 20 to 60 g/m2, a raw density of 0.5 to 0.9 g/cm3, an air permeability of 10 to 250 CU, a filler material content in the range of 10 to 60 percent, and a burn promoting salt content in the range of 0 to 5 percent. The inner layer has an area weight of 6 to 20 g/m2, a raw density of 0.7 to 1 g/cm3, and an air permeability of 0 to 12 CU. The layers are wet laminated in a paper machine. Smoking articles with such a wraper do not experience a change in taste of the main smoke flow nor any spot development, and they afford an attractive ash tube or sheath. The time period for extinguishing the smoking article can be varied within wide limits. Moreover a drastic reduction of secondary smoke flow can be noted. | |
