US4433697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wrapper for smoking articles and method
Assignee: Magnera Corp
•
Filing: 1982-04-07
•
Granted: 1984-02-28
•
Expires: 2002-04-07
Abstract
Abstract A wrapper is provided for smoking articles such as cigarettes, cigars and the like having incorporated therein at least 1% by weight of certain ceramic fibers in the paper furnish in combination magnesium oxide and/or magnesium hydroxide fillers, whereby the combination acts to significantly reduce visible sidestream smoke emanating from the smoking article during static burning, and improves ashing. Wrappers made according to this invention may be made by incorporating the magnesium hydroxide, magnesium oxide and the other fillers in the wrapper pulp furnish containing the ceramic fibers or either or both of the fillers may be applied to the improved wrapper as a coating for the papers. In the case of cigarette papers, the ceramic fibers may be added to an ordinary paper furnish such as pulped wood or flax fibers. The furnish of fiber pulp and ceramic fibers and fillers are used to make a paper sheet on conventional papermaking machines.
Inventors
- 👤 Warren K. Cline
- 👤 William F. Owens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:29
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/14; D21H5/16; A; A24; A24D; A24D1/00; A24D1/02
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
61 words
A wrapper for smoking articles such as cigarettes, cigars and the like comprising a cellulosic sheet containing a small percentage of ceramic fibers selected from the group consisting of polycrystalline alumina, aluminum-silicate, and amorphous alumina and as a filler magnesium hydroxide and/or magnesium oxide coated on or applied to the fibers of the sheet to form cigarette paper or cigar wrap.
Claim 2
Dependent Claim
61 words
A wrapper for smoking articles such as cigarettes, cigars and the like comprising a cellulosic sheet containing a small percentage of ceramic fibers selected from the group consisting of polycrystalline alumina, aluminum-silicate, and amorphous alumina and as a filler magnesium hydroxide and/or magnesium oxide coated on or applied to the fibers of the sheet to form cigarette paper or cigar wrap.
Claim 3
Dependent Claim
26 words
The wrapper as defined in claim 1, wherein the ceramic fiber comprises 1% to 5% or more by weight of the total fibers of the sheet.
Claim 4
Dependent Claim
24 words
The wrapper as defined in claim 1, wherein the ceramic fiber comprises at least 2.5% by weight of the total weight of the sheet.
Claim 5
Dependent Claim
14 words
A wrapper as defined in claim 2, wherein the ceramic fibers comprise polycrystalline alumina.
Claim 6
Dependent Claim
13 words
A wrapper as defined in claim 4, wherein the ceramic fibers comprise aluminum-silicate.
Claim 7
Dependent Claim
14 words
A wrapper as defined in claim 4, wherein the ceramic fibers comprise amorphous alumina.
Claim 8
Dependent Claim
17 words
The wrapper of claim 1 wherein the ceramic fibers are 1.5 micrometers in average diameter or less.
Claim 9
Dependent Claim
58 words
A smoking article comprising a tobacco charge and a wrapper for the tobacco charge, said wrapper comprising a cellulosic sheet containing a small percentage of ceramic fibers selected from the group consisting of polycrystalline alumina, aluminum-silicate and amorphous alumina and as a filler magnesium hydroxide and/or magnesium oxide coated on or applied to the fibers of the sheet.
Claim 10
Dependent Claim
58 words
A smoking article comprising a tobacco charge and a wrapper for the tobacco charge, said wrapper comprising a cellulosic sheet containing a small percentage of ceramic fibers selected from the group consisting of polycrystalline alumina, aluminum-silicate and amorphous alumina and as a filler magnesium hydroxide and/or magnesium oxide coated on or applied to the fibers of the sheet.
Claim 11
Dependent Claim
27 words
A smoking article as defined in claim 8, wherein the ceramic fiber comprises 1% to 5% or more by weight of the total weight of the sheet.
Claim 12
Dependent Claim
25 words
A smoking article as defined in claim 8, wherein the ceramic fiber comprises at least 3% by weight of the total fibers of the sheet.
Claim 13
Dependent Claim
14 words
A smoking article defined in claim 8, wherein the ceramic fiber comprises polycrystalline alumina.
Claim 14
Dependent Claim
13 words
A smoking article defined in claim 11, wherein the ceramic fiber comprises aluminum-silicate.
Claim 15
Dependent Claim
14 words
A smoking article defined in claim 11, wherein the ceramic fiber comprises amorphous alumina.
Claim 16
Dependent Claim
13 words
The smoking article of claim 8, in which the wrapper is cigarette paper.
Claim 17
Dependent Claim
13 words
The smoking article of claim 8 in which the wrapper is cigar wrap.
Claim 18
Dependent Claim
19 words
A smoking article of claim 8 in which the ceramic fibers are 1.5 micrometers in average diameter or less.
Claim 19
Independent Claim
65 words
A method for reducing the visible sidestream smoke emanating from a smoking article comprising wrapping the tobacco charge in the smoking article in a combustible cellulosic sheet containing, a small percentage of ceramic fibers selected from the group consisting of polycrystalline alumina, aluminum-silicate and amorphous alumina and as a filler magnesium hydroxide and/or magnesium oxide coated on or applied to the fibers of the sheet.
Claim 20
Independent Claim
65 words
A method for reducing the visible sidestream smoke emanating from a smoking article comprising wrapping the tobacco charge in the smoking article in a combustible cellulosic sheet containing, a small percentage of ceramic fibers selected from the group consisting of polycrystalline alumina, aluminum-silicate and amorphous alumina and as a filler magnesium hydroxide and/or magnesium oxide coated on or applied to the fibers of the sheet.
Claim 21
Dependent Claim
26 words
The method as defined in claim 17, wherein the ceramic fiber comprises 1% to 5% or more by weight of the total weight of the sheet.
Claim 22
Dependent Claim
24 words
The method as defined in claim 17, wherein the ceramic fiber comprises at least 2.5% by weight of the total fibers of the sheet.
Claim 23
Dependent Claim
20 words
The method as defined in claim 17, wherein the ceramic fibers have an average diameter of 1.5 micrometer or less.
References Cited (Backward Citations)
US2733720A
Cited
US1518944A
Cited
US2307088A
Cited
US2890704A
Cited
US2998012A
Cited
US3477865A
Cited
US4231377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |