GB1331096A - Tobacco-smoke filters - Google Patents
Tobacco-smoke filtersInfo
- Publication number
- GB1331096A GB1331096A GB4770770A GB1331096DA GB1331096A GB 1331096 A GB1331096 A GB 1331096A GB 4770770 A GB4770770 A GB 4770770A GB 1331096D A GB1331096D A GB 1331096DA GB 1331096 A GB1331096 A GB 1331096A
- Authority
- GB
- United Kingdom
- Prior art keywords
- injected
- outlet
- additive
- extrusion
- die
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/0229—Filter rod forming processes
- A24D3/0237—Filter rod forming processes by extrusion
Landscapes
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Manufacturing Of Cigar And Cigarette Tobacco (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
1331096 Tobacco-smoke filters BRITISH AMERICAN TOBACCO CO Ltd 4 Oct 1971 [7 Oct 1970] 47707/70 Heading A2C [Also in Divisions B5 and C3] One or more additives is intermittently injected into a cigarette filter rod comprising open cell foamed thermoplastics material, during continuous extrusion of a rod of the material. In the examples (1), a suspension of carbon in triacetin at 170‹C was injected into extruding polyethylene foam; (2), a solution of menthol in triacetin was injected into the polyethylene; (3) a solution of polyethylene glycol in triacetin at 170‹C was injected into polypropylene foam. The foam may also comprise cellulose, or nylon e.g. foamed by a blowing agent or inert gas. The additives may have selective filtration properties, or filtration enhancing properties, and may comprise manganese dioxide, zinc oxide, zeolites, ethylene diamene diacetate, alumina, or finely divided zinc, as solutions, suspensions or slurries, and may also comprise sweetening agents. The additive is injected downstream of the extrusion outlet from a nozzle co-axial therewith, and more than one such outlet may be provided for the separate injection of more than one additive. The injection may be effected via a periodically opened valve, but in the described embodiment, Fig. 1, is injected from an outlet passing through the extrusion die 1, to which the additive is intermittently supplied by a piston pump 4, to within the extruded rod 7 to form spaced additive zones 6. After being drawn by an endless belt traction device 10 through a sizing die 8 and cooling bath 9, the rod 7 is cut midway along the zones, by a device 11, into multiple filter lengths. In the Fig. 2 embodiment (not printed), the additive outlet extends through a cross-head extrusion die, through a support defining with the die an annular extrusion outlet of diameter decreasing in the extrusion direction, the support and/or the outlet being axially adjustable in the die head.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4770770 | 1970-10-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1331096A true GB1331096A (en) | 1973-09-19 |
Family
ID=10445984
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4770770A Expired GB1331096A (en) | 1970-10-07 | 1970-10-07 | Tobacco-smoke filters |
Country Status (7)
Country | Link |
---|---|
AU (1) | AU460006B2 (en) |
BE (1) | BE773622A (en) |
CA (1) | CA939225A (en) |
CH (1) | CH544514A (en) |
GB (1) | GB1331096A (en) |
NL (1) | NL172021B (en) |
ZA (1) | ZA716273B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4282890A (en) * | 1978-03-13 | 1981-08-11 | Celanese Corporation | Open cell structure foamed cellulose acetate filters |
EP2323506B2 (en) † | 2008-05-21 | 2016-07-27 | R.J.Reynolds Tobacco Company | Apparatus and associated method for forming a filter component of a smoking article and smoking articles made therefrom |
US9642394B2 (en) | 2011-07-21 | 2017-05-09 | British American Tobacco (Investments) Limited | Porous carbon and methods of production thereof |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11291242B2 (en) | 2019-08-28 | 2022-04-05 | Aiger Group Ag | Apparatus and method for forming a smoke filter |
-
1970
- 1970-10-07 GB GB4770770A patent/GB1331096A/en not_active Expired
-
1971
- 1971-09-20 ZA ZA716273A patent/ZA716273B/en unknown
- 1971-09-21 CA CA123,305A patent/CA939225A/en not_active Expired
- 1971-09-24 AU AU33886/71A patent/AU460006B2/en not_active Expired
- 1971-10-01 NL NLAANVRAGE7113503,A patent/NL172021B/en not_active IP Right Cessation
- 1971-10-06 CH CH1450971A patent/CH544514A/en not_active IP Right Cessation
- 1971-10-07 BE BE773622A patent/BE773622A/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4282890A (en) * | 1978-03-13 | 1981-08-11 | Celanese Corporation | Open cell structure foamed cellulose acetate filters |
EP2323506B2 (en) † | 2008-05-21 | 2016-07-27 | R.J.Reynolds Tobacco Company | Apparatus and associated method for forming a filter component of a smoking article and smoking articles made therefrom |
US9642394B2 (en) | 2011-07-21 | 2017-05-09 | British American Tobacco (Investments) Limited | Porous carbon and methods of production thereof |
Also Published As
Publication number | Publication date |
---|---|
CH544514A (en) | 1973-11-30 |
AU3388671A (en) | 1973-03-29 |
CA939225A (en) | 1974-01-01 |
BE773622A (en) | 1972-01-31 |
ZA716273B (en) | 1972-05-31 |
DE2149434B2 (en) | 1976-05-06 |
NL7113503A (en) | 1972-04-11 |
DE2149434A1 (en) | 1972-05-10 |
AU460006B2 (en) | 1975-04-10 |
NL172021B (en) | 1983-02-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |