CA2249816C - Method and device for application of substances onto a filter material - Google Patents
Method and device for application of substances onto a filter material Download PDFInfo
- Publication number
- CA2249816C CA2249816C CA002249816A CA2249816A CA2249816C CA 2249816 C CA2249816 C CA 2249816C CA 002249816 A CA002249816 A CA 002249816A CA 2249816 A CA2249816 A CA 2249816A CA 2249816 C CA2249816 C CA 2249816C
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- Prior art keywords
- powder chamber
- filter material
- filter
- solids
- planiform
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Classifications
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- 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
- A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
- A24D3/0212—Applying additives to filter materials
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- 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
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/14—Use of materials for tobacco smoke filters of organic materials as additive
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Filtering Materials (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Screw Conveyors (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention relates to a method and a device for applying substances to the fibers of a filter material for smokable articles, wherein fibrous or sheet-like filter materials are dusted with micronized solid substances.
Description
METHOD AND DEVICE FOR APPLICATION
OF SUBSTANCES ONTO A FILTER MATERIAL
BACKGROUND OF THE INVENTION
1. Field of the Invention The invention relates to a method and a device for applying substances to the fibers of a filter material for smokable articles.
OF SUBSTANCES ONTO A FILTER MATERIAL
BACKGROUND OF THE INVENTION
1. Field of the Invention The invention relates to a method and a device for applying substances to the fibers of a filter material for smokable articles.
2. Description of the Related Art It is known from DE 39 04 239 Cl and DE 38 20 089 C2 to apply substances to the fibers of a tobacco smoke filter, these substances being more particularly physiologically and sensorically safe polycarboxylic acids or acidic salts thereof such as the esters of citric acid, tartaric acid, succinic acid and malic acid.
For this purpose the polycarboxylic acids or the acidic salts thereof, which are crystalline at ambient and processing temperatures, are applied in the form of fine particles having a particle size numbering less than 50 m suspended in an or-ganic liquid medium and the resulting suspension is applied to the fibers (DE 39 04 239 C1).
As an alternative, acidic anhydrides of the di- or polycar-boxylic acids may be dissolved in the organic solvent and applied to the fibers and, where necessary, hydrolysed with water (DE 38 20 089 C2).
The drawback in applying such substances of a suspension or a solvent such as e.g. triacetin is that in high concentra-tions this suspension becomes viscous and can then no longer be pumped off, this being the reason why no high filter tow loads of these substances may be applied by these known methods.
SUMMARY OF THE INVENTION
The invention is based on the object of defining a method and a device for applying substances to the fibers of a filter material for smokable articles which obviate the afore-men-tioned drawbacks. More particularly it is the intention to define a method and a device with which even high loadings of the substances may be applied by simple ways and means.
This object is achieved for a method for applying substances to the fibers of a filter material for smokable articles, wherein fibrous or sheet-like filter materials are dusted with micronized solid substances, and for a device for applying substances to the fibers of a filter material for smokable articles comprising a metering means for micronized solid substances and an injector nozzle for pneumatically trans-porting the metered solid substances to a powder chamber, a fibrous or sheet-like filter material being passed through said powder chamber.
Expedient embodiments are defined by the features of the subordinate claims.
The advantages achieved by the invention are based on the fact that by means of an atomizing procedure micronized solid substances may be applied to fibrous or sheet-like filter ma-terials in near unlimited amounts so that application may be made with extremely high loadings as are impossible in appli-cation of a suspension. Due to these high loadings effects are achievable hitherto held to be impossible.
For this purpose the polycarboxylic acids or the acidic salts thereof, which are crystalline at ambient and processing temperatures, are applied in the form of fine particles having a particle size numbering less than 50 m suspended in an or-ganic liquid medium and the resulting suspension is applied to the fibers (DE 39 04 239 C1).
As an alternative, acidic anhydrides of the di- or polycar-boxylic acids may be dissolved in the organic solvent and applied to the fibers and, where necessary, hydrolysed with water (DE 38 20 089 C2).
The drawback in applying such substances of a suspension or a solvent such as e.g. triacetin is that in high concentra-tions this suspension becomes viscous and can then no longer be pumped off, this being the reason why no high filter tow loads of these substances may be applied by these known methods.
SUMMARY OF THE INVENTION
The invention is based on the object of defining a method and a device for applying substances to the fibers of a filter material for smokable articles which obviate the afore-men-tioned drawbacks. More particularly it is the intention to define a method and a device with which even high loadings of the substances may be applied by simple ways and means.
This object is achieved for a method for applying substances to the fibers of a filter material for smokable articles, wherein fibrous or sheet-like filter materials are dusted with micronized solid substances, and for a device for applying substances to the fibers of a filter material for smokable articles comprising a metering means for micronized solid substances and an injector nozzle for pneumatically trans-porting the metered solid substances to a powder chamber, a fibrous or sheet-like filter material being passed through said powder chamber.
Expedient embodiments are defined by the features of the subordinate claims.
The advantages achieved by the invention are based on the fact that by means of an atomizing procedure micronized solid substances may be applied to fibrous or sheet-like filter ma-terials in near unlimited amounts so that application may be made with extremely high loadings as are impossible in appli-cation of a suspension. Due to these high loadings effects are achievable hitherto held to be impossible.
Trials have indicated that by employing micronized solid substances concentrations are achievable which are higher by the factor ten than hitherto achieved concentrations.
This accordingly permits enhancing the selective retention capacity of the filter and/or influencing the taste of the tobacco smoke without increasing the resistance to draw as is unavoidable in the use of denser filter materials employed sometimes for achieving special taste nuances.
This advantageous application of the substances to the fil-ter tow ensures the activity of the latter since no combus-tion, oxidation or destruction occurs during smoking.
Whilst in theory there is no limit to the amount applied, in actual practice there is a limit to the resistance to draw of the filter which must not be too high.
In accordance with one preferred embodiment solid substances or homogenous blends of solid substances are employed having a particle size of max. 50 m, more particularly max. 10 m, since such extremely small particles ensure an even distribu-tion and thus a homogenous effect of the filter treated as such.
It has been found to be expedient to feed in metered fashion the solid substances, with the metered dispensing or metering being implemented to take into account the filter production rate, as a result of which it can be assured that always the same amount of substance is applied, for example, per unit fiber length.
Dispensing or metering is done expediently by a feed hopper discontinuously delivering the micronized solid substances in conjunction with a fine dispenser operating gravimetrically and a twin screw for feeding the micronized solid substances to a pneumatically operating conveying section. In conjunction with the feedback via the filter production rate it can be as-sured that always the same amount of micronized solid sub-stances is applied, for example, per unit fiber length.
The micronized solid particles are pneumatically conveyed through a solids injector nozzle so that they are entrained by the vacuum created in a tube, as a result of which clumping is practically excluded.
To optimize the distribution of the solid substances in the air flow and to resolve any clumping the pneumatically con-veyed solids/air flow is passed through a mixing zone.
The actual dusting is done in a powder chamber which is open in the direction of movement of the sheet-like or fibrous fil-ter material so as not to obstruct passage of the filter ma-terial.
Triacetin is applied to the filter material, i.e. either up-stream or downstream of the powder chamber, the triacetin ap-plication being made preferably upstream of the powder chamber to further improve the adherence of the micronized solid par-ticles on the filter material.
The air gap for entry of the filter material into the powder chamber is adjustable, it being adjusted so that non-contact transport of the filter material is assured whilst preventing the emergence of metered solid substances from the powder chamber.
To further optimize application of solid substances in the powder chamber the charging condition of the filter material may be influenced by arranging upstream of the powder chamber, i.e. spaced away from the powder chamber roughly 50 to 150 mm upstream thereof and transversely to the production movement direction of the filter material, an ionization rod consisting of a rod electrode and a counter-electrode. This ionization rod charges the surface of the filter material to improve adherence of the micronized solid particles.
Should a particularly large amount of micronized solid particles need to be applied to the filter material the dusting may be undertaken on both sides of the filter material. For this purpose two nozzles may be provided in the powder chamber which feed the micronized solid particles from below and above.
On leaving the powder chamber the filter material dusted with the micronized solid particles is brought together to form a filter rod which is processed in the usual way into a finished filter.
Expediently, the outlet of the powder chamber is connected to a fan drawing air and micronized solid substances through the powder chamber and where necessary through a dust col-lector connected to the powder chamber.
The vacuum connecting the outlet of the powder chamber is adjustable and permits excess air to be exhausted from the pneumatic conveyance of the solid substances. Adjusting the vacuum in the powder chamber may be done by a flap applied to one side of the powder chamber.
The vacuum at the fan during the production and metering phase is expediently maintained constant to ensure a con-sistently constant product application to the filter tow and to prevent dust emerging from the powder chamber.
This accordingly permits enhancing the selective retention capacity of the filter and/or influencing the taste of the tobacco smoke without increasing the resistance to draw as is unavoidable in the use of denser filter materials employed sometimes for achieving special taste nuances.
This advantageous application of the substances to the fil-ter tow ensures the activity of the latter since no combus-tion, oxidation or destruction occurs during smoking.
Whilst in theory there is no limit to the amount applied, in actual practice there is a limit to the resistance to draw of the filter which must not be too high.
In accordance with one preferred embodiment solid substances or homogenous blends of solid substances are employed having a particle size of max. 50 m, more particularly max. 10 m, since such extremely small particles ensure an even distribu-tion and thus a homogenous effect of the filter treated as such.
It has been found to be expedient to feed in metered fashion the solid substances, with the metered dispensing or metering being implemented to take into account the filter production rate, as a result of which it can be assured that always the same amount of substance is applied, for example, per unit fiber length.
Dispensing or metering is done expediently by a feed hopper discontinuously delivering the micronized solid substances in conjunction with a fine dispenser operating gravimetrically and a twin screw for feeding the micronized solid substances to a pneumatically operating conveying section. In conjunction with the feedback via the filter production rate it can be as-sured that always the same amount of micronized solid sub-stances is applied, for example, per unit fiber length.
The micronized solid particles are pneumatically conveyed through a solids injector nozzle so that they are entrained by the vacuum created in a tube, as a result of which clumping is practically excluded.
To optimize the distribution of the solid substances in the air flow and to resolve any clumping the pneumatically con-veyed solids/air flow is passed through a mixing zone.
The actual dusting is done in a powder chamber which is open in the direction of movement of the sheet-like or fibrous fil-ter material so as not to obstruct passage of the filter ma-terial.
Triacetin is applied to the filter material, i.e. either up-stream or downstream of the powder chamber, the triacetin ap-plication being made preferably upstream of the powder chamber to further improve the adherence of the micronized solid par-ticles on the filter material.
The air gap for entry of the filter material into the powder chamber is adjustable, it being adjusted so that non-contact transport of the filter material is assured whilst preventing the emergence of metered solid substances from the powder chamber.
To further optimize application of solid substances in the powder chamber the charging condition of the filter material may be influenced by arranging upstream of the powder chamber, i.e. spaced away from the powder chamber roughly 50 to 150 mm upstream thereof and transversely to the production movement direction of the filter material, an ionization rod consisting of a rod electrode and a counter-electrode. This ionization rod charges the surface of the filter material to improve adherence of the micronized solid particles.
Should a particularly large amount of micronized solid particles need to be applied to the filter material the dusting may be undertaken on both sides of the filter material. For this purpose two nozzles may be provided in the powder chamber which feed the micronized solid particles from below and above.
On leaving the powder chamber the filter material dusted with the micronized solid particles is brought together to form a filter rod which is processed in the usual way into a finished filter.
Expediently, the outlet of the powder chamber is connected to a fan drawing air and micronized solid substances through the powder chamber and where necessary through a dust col-lector connected to the powder chamber.
The vacuum connecting the outlet of the powder chamber is adjustable and permits excess air to be exhausted from the pneumatic conveyance of the solid substances. Adjusting the vacuum in the powder chamber may be done by a flap applied to one side of the powder chamber.
The vacuum at the fan during the production and metering phase is expediently maintained constant to ensure a con-sistently constant product application to the filter tow and to prevent dust emerging from the powder chamber.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be explained in more detail on the basis of an example embodiment of a device for applying sub-stances to the fibers of a filter tow with respect to the attached diagrammatic drawings in which Fig. 1 is a diagrammatic depiction of the device and Fig. 2 is an illustration of the powder chamber with the adjoining injector nozzle on a magnified scale.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The filter tow 32 is fed in the usual way as a carpet through extender rolls 33 (shown schematically) and a guide 35 to a device 36 in which triacetin is applied to the filter tow carpet.
In the direction of movement of the filter tow 32, down-stream of the triacetin applicator 36 the filter tow 32 is again trained over extender rolls 37 before entering the air gap between two ionizing rods 39, namely a rod electrode and a counter-electrode supplied with a negative charging poten-tial from a charge generator 41 with a sparking limiter.
From the air gap between the two ionizing rods 39 the filter tow carpet 32 enters an inlet slot 43 of a powder chamber 34 (see also Fig. 2) which is open in the direction of movement of the filter tow 32 so as not to obstruct the passage of the filter tow 32.
The size of the air gap 43 for entering the filter tow 32 into the powder chamber 34 can be adjusted perpendicular to the direction of movement of the filter tow 32 and is set so that a non-contact transport of the filter tow 32 is assured and exit of the fluidized solid substances from the powder chamber 32 is prevented.
In the powder chamber 34 the tensioned filter tow 32 is dusted with micronized solid substances or blended solid sub-stances in a way to be detailed later, as indicated by the two nozzles 52 in Fig. 2, located above and below the filter tow carpet 32 respectively.
On the side opposite the inlet slot 43 the powder chamber 34 is provided with an outlet slot 54 at which an injector nozzle 44 as standard for filter production is fitted in which the filter tow 32 is brought together to a rod form and dust-laden air suctioned off.
The thus produced filter rod dusted with micronized solid particles is then enwraped with filter paper and cut to the necessary filter rod length to be fed in a subsequent step in production to a cigarette making machine where it is chopped into pieces of suitable length and joined to the tobacco rods to produce finished filter cigarettes.
The preparation of the micronized solid substances and blended solid substances will now be described which may involve physiologically safe and sensorically interesting substances, more particularly polycarboxylic acids or the acidic salts of polycarboxylic acids such as citric acid, tartaric acid, succinic acid, malic acid, ascorbic acid as well as the acidic esters of such organic polycarboxylic acids, mono-di-saccharides (e.g. glucose, cane sugar) and flavourants (vanillin, menthol, etc.).
The invention will now be explained in more detail on the basis of an example embodiment of a device for applying sub-stances to the fibers of a filter tow with respect to the attached diagrammatic drawings in which Fig. 1 is a diagrammatic depiction of the device and Fig. 2 is an illustration of the powder chamber with the adjoining injector nozzle on a magnified scale.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The filter tow 32 is fed in the usual way as a carpet through extender rolls 33 (shown schematically) and a guide 35 to a device 36 in which triacetin is applied to the filter tow carpet.
In the direction of movement of the filter tow 32, down-stream of the triacetin applicator 36 the filter tow 32 is again trained over extender rolls 37 before entering the air gap between two ionizing rods 39, namely a rod electrode and a counter-electrode supplied with a negative charging poten-tial from a charge generator 41 with a sparking limiter.
From the air gap between the two ionizing rods 39 the filter tow carpet 32 enters an inlet slot 43 of a powder chamber 34 (see also Fig. 2) which is open in the direction of movement of the filter tow 32 so as not to obstruct the passage of the filter tow 32.
The size of the air gap 43 for entering the filter tow 32 into the powder chamber 34 can be adjusted perpendicular to the direction of movement of the filter tow 32 and is set so that a non-contact transport of the filter tow 32 is assured and exit of the fluidized solid substances from the powder chamber 32 is prevented.
In the powder chamber 34 the tensioned filter tow 32 is dusted with micronized solid substances or blended solid sub-stances in a way to be detailed later, as indicated by the two nozzles 52 in Fig. 2, located above and below the filter tow carpet 32 respectively.
On the side opposite the inlet slot 43 the powder chamber 34 is provided with an outlet slot 54 at which an injector nozzle 44 as standard for filter production is fitted in which the filter tow 32 is brought together to a rod form and dust-laden air suctioned off.
The thus produced filter rod dusted with micronized solid particles is then enwraped with filter paper and cut to the necessary filter rod length to be fed in a subsequent step in production to a cigarette making machine where it is chopped into pieces of suitable length and joined to the tobacco rods to produce finished filter cigarettes.
The preparation of the micronized solid substances and blended solid substances will now be described which may involve physiologically safe and sensorically interesting substances, more particularly polycarboxylic acids or the acidic salts of polycarboxylic acids such as citric acid, tartaric acid, succinic acid, malic acid, ascorbic acid as well as the acidic esters of such organic polycarboxylic acids, mono-di-saccharides (e.g. glucose, cane sugar) and flavourants (vanillin, menthol, etc.).
The finely ground, micronized pure solid substances or homogenously blended micronized solid substances have a particle size of max. 50 m and are taken from a feed hopper 12 adapted to the processing capacity and entered discon-tinuously into a fine metering means 14, the level of which is sensed by MAX/MIN sensors. As soon as the MIN level is vio-lated the sensors are activated and the solid substances re-plenished from the feed hopper 12, replenishing being auto-matically deactivated once the MAX level is attained.
The gravimetrically operating fine metering means 14 sup-plies the solid substances and blended solid substances via a twin screw 16 powered by an electric motor 15 into a pneu-matically operating conveyor zone 17. The fine metering means 14 is electrically coupled to the filter making machine, i.e.
the amount metered out per filter rod is entered as a fixed value in the electronic control 19 for the fine dispenser 14, the filter production rate serving as the speed command value for the fine metering means 14 and as a target value for the control thereof. The machine speed is sensed by an encoder 20 at chopper 22 of the filter making machine which chops the endless filter rod into individual filter plugs.
The solid substances metered out by the fine metering means 14 drop in free fall through a tube 23 downwards into a solids injector nozzle 26. It is at this point that the pneumatic solids conveyance commences since pressurized air 30 free of oil and grease is blown through a nozzle ring of the solids injector nozzle 26 into the interior of the tube 17 adjoining the nozzle 26. The resulting vacuum in the interior of the tube 17 entrains the solid substances.
To optimize distribution of the solid substances in the air flow and to resolve any clumping the solid substances/air flow is passed through a mixing zone 18 formed by a tube passing vertically downwards into the powder chamber 34.
In the upper portion of the powder chamber 34 a transverse-ly-located wide-slotted nozzle 52 whose width of the nozzle slot transversely to the direction of production, i.e. to the direction of movement of the filter tow 32, corresponds at least to the tow width upstream or downstream of the triacetin applicator 36. The spacing of the nozzle 52 from the filter tow 32 may be freely adjusted by adjusting the wide-slotted nozzle 52 vertically upwards or downwards as indicated by the arrow 54.
Although a single nozzle 52 is principally sufficient as a rule, a variant is also illustrated in Fig. 2 in which a se-cond wide-slotted nozzle 52 is applied beneath the filter tow 32. The flow of solid substances/air arriving from the pneu-matic conveying section is parted upstream of the two nozzles, this parting of the flow being freely adjustable.
Below the filter tow 32 the powder chamber 34 tapers into a suction exhaust tube 56, the vacuum of which is adjustable to permit drawing off excess air from the pneumatic conveyance of the solid substances.
The vacuum in the powder chamber 34 is adjustable by a flap 38 provided on one side of the powder chamber. The dust-laden drawn-off conveying air is applied to a mobile dust-collector for cleaning. The vacuum in the dust collector 40 or in the powder chamber 34 is generated by a downstream fan 50, the vacuum at the fan 50 being maintained constant during the production and metering phase to ensure a consistent, constant application of the product to the filter tow and to prevent dust exit from the powder chamber 34.
The gravimetrically operating fine metering means 14 sup-plies the solid substances and blended solid substances via a twin screw 16 powered by an electric motor 15 into a pneu-matically operating conveyor zone 17. The fine metering means 14 is electrically coupled to the filter making machine, i.e.
the amount metered out per filter rod is entered as a fixed value in the electronic control 19 for the fine dispenser 14, the filter production rate serving as the speed command value for the fine metering means 14 and as a target value for the control thereof. The machine speed is sensed by an encoder 20 at chopper 22 of the filter making machine which chops the endless filter rod into individual filter plugs.
The solid substances metered out by the fine metering means 14 drop in free fall through a tube 23 downwards into a solids injector nozzle 26. It is at this point that the pneumatic solids conveyance commences since pressurized air 30 free of oil and grease is blown through a nozzle ring of the solids injector nozzle 26 into the interior of the tube 17 adjoining the nozzle 26. The resulting vacuum in the interior of the tube 17 entrains the solid substances.
To optimize distribution of the solid substances in the air flow and to resolve any clumping the solid substances/air flow is passed through a mixing zone 18 formed by a tube passing vertically downwards into the powder chamber 34.
In the upper portion of the powder chamber 34 a transverse-ly-located wide-slotted nozzle 52 whose width of the nozzle slot transversely to the direction of production, i.e. to the direction of movement of the filter tow 32, corresponds at least to the tow width upstream or downstream of the triacetin applicator 36. The spacing of the nozzle 52 from the filter tow 32 may be freely adjusted by adjusting the wide-slotted nozzle 52 vertically upwards or downwards as indicated by the arrow 54.
Although a single nozzle 52 is principally sufficient as a rule, a variant is also illustrated in Fig. 2 in which a se-cond wide-slotted nozzle 52 is applied beneath the filter tow 32. The flow of solid substances/air arriving from the pneu-matic conveying section is parted upstream of the two nozzles, this parting of the flow being freely adjustable.
Below the filter tow 32 the powder chamber 34 tapers into a suction exhaust tube 56, the vacuum of which is adjustable to permit drawing off excess air from the pneumatic conveyance of the solid substances.
The vacuum in the powder chamber 34 is adjustable by a flap 38 provided on one side of the powder chamber. The dust-laden drawn-off conveying air is applied to a mobile dust-collector for cleaning. The vacuum in the dust collector 40 or in the powder chamber 34 is generated by a downstream fan 50, the vacuum at the fan 50 being maintained constant during the production and metering phase to ensure a consistent, constant application of the product to the filter tow and to prevent dust exit from the powder chamber 34.
The web-like filter tow, the charge condition of which has been influenced by the ionizing rods 39 to optimize solid sub-stances application, is dusted in the powder chamber 34 with the micronized solid substances which adhere to the fibers of the filter tow 32 to which the applied triacetin also contri-butes. The spread-out filter tow 32 is subsequently run to-gether into an endless filter rod and processed in the usual way into cigarette filters which in the next step in produc-tion are joined to a tobacco rod by a wrapping paper.
As an alternative to the filter tow as described web-type filter materials permeable to air, such as filter paper for example, may also be dusted with micronized solid particles by means of the device 10 described.
As an alternative to the embodiment discussed and as viewed in the transport direction of the filter material 32 the tria-cetin applicator 36 may also be located downstream of the pow-der chamber, of course prior to the filter material being run together into a filter rod.
As an alternative to the filter tow as described web-type filter materials permeable to air, such as filter paper for example, may also be dusted with micronized solid particles by means of the device 10 described.
As an alternative to the embodiment discussed and as viewed in the transport direction of the filter material 32 the tria-cetin applicator 36 may also be located downstream of the pow-der chamber, of course prior to the filter material being run together into a filter rod.
Claims (10)
1. A method for applying substances to the fibres of a filter material for smokable articles, wherein micronised pure solids or homogenous solid mixtures having a particle size of at most 50 µm are dusted onto a planiform filter material, characterised in that said micronised solids or solid mixtures are supplied in doses in accordance with the speed of filter production and dusted onto fibrous or planiform filter materials (32).
2. The method as set forth in claim 1 wherein solids or solid mixtures having a particle size of at most 10 µm are used.
3. The method as set forth in claim 1 or 2, characterised in that dosed micronised solids are introduced by pneumatic conveyance (17, 18, 26) into a powder chamber (34), through which said fibrous or planiform filter material (32) is transported at an angle of at least 45° to the transport direction of the solids, wherein either filter tow (32) provided with triacetin is introduced into the powder chamber (34) and then accumulated into a filter rod or the fibrous or planiform filter material (32) is dusted from above and below in the powder chamber (34) with the micronised solids, and in that the fibrous or planiform filter material (32) in particular is charged by ionisation before the powder chamber (34) as viewed in its transport direction.
4. A device for applying substances to the fibres of a filter material for smokable articles a) comprising a powder chamber (34) for dusting micronised pure solids or a homogenous solid mixture having a particle size of at most 50 µm onto a planiform filter material (32), b) wherein the transport path of the planiform filter material (32) through the powder chamber (34) runs approximately at right angles to the transport direction of the micronised solids or solid mixtures, characterised by the following features:
c) a dosing means (12, 14, 16) which supplies said micronised solids or solid mixtures in doses in accordance with the speed of filter production; and d) an injector nozzle (26) for pneumatically transporting the dosed solids or solid mixtures to the powder chamber (34), through which said fibrous or planiform filter material (32) is channelled.
c) a dosing means (12, 14, 16) which supplies said micronised solids or solid mixtures in doses in accordance with the speed of filter production; and d) an injector nozzle (26) for pneumatically transporting the dosed solids or solid mixtures to the powder chamber (34), through which said fibrous or planiform filter material (32) is channelled.
5. The device as set forth in claim 4, characterised in that said dosing means comprises a storage vessel (12) supplying discontinuously micronised solids and a fine-dosing means (14, 16), wherein said gravimetrically operating fine-dosing means (14, 16) in particular comprises a double-lead screw (16) for supplying the micronised solids to a pneumatically operating conveying path and the fine-dosing means (14, 16) is electrically coupled to the filter producing machine, such that the speed of filter production is used as a speed guide value for the fine--dosing means (14, 16) and as an set or nominal value for regulating it.
6. The device as set forth in any one of claims 4 or 5, characterised in that the powder chamber (34) is open in the running direction of the fibrous or planiform filter material (32), and in that a means (36) for applying triacetin is preferably arranged in front of or behind the powder chamber (34) in the transport direction of the fibrous or planiform filter material (32 ) .
7. The device as set forth in any one of claims 4 to 6, characterised in that the air gap (43) for introducing the fibrous or planiform filter material (32) into the powder chamber (34) may be set such that non-contact transport of the filter material (32) is ensured and the escape of fluidised solids is prevented.
8. The device as set forth in any one of claims 4 to 7, characterised in that an injector nozzle for forming the filter rod from the fibrous or planiform filter material (32) is arranged at the outlet of the powder chamber (34), and/or in that ionisation electrodes (39) are arranged in front of the powder chamber (34) in the transport direction of the filter material (32).
9. The device as set forth in any one of claims 4 to 8, characterised in that the powder chamber (34) comprises a flap (38) for setting the partial vacuum in the powder chamber (34), and in that a dust extraction system (40) is preferably connected to the powder chamber (34).
10. The device as set forth in any one of claims 4 to 9, characterised in that a fan (50) for generating the partial vacuum in the powder chamber (34) is connected to the powder chamber, and in that said fan (50) sucks air and micronised solids through the powder chamber (34) and said dust extraction system (40).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19748072.1 | 1997-10-30 | ||
| DE19748072A DE19748072A1 (en) | 1997-10-30 | 1997-10-30 | Method and device for applying substances to a filter material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2249816A1 CA2249816A1 (en) | 1999-04-30 |
| CA2249816C true CA2249816C (en) | 2007-06-26 |
Family
ID=7847176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002249816A Expired - Fee Related CA2249816C (en) | 1997-10-30 | 1998-10-08 | Method and device for application of substances onto a filter material |
Country Status (13)
| Country | Link |
|---|---|
| EP (1) | EP0913100B1 (en) |
| JP (1) | JP3037937B2 (en) |
| KR (1) | KR100335469B1 (en) |
| CN (1) | CN1112140C (en) |
| AT (1) | ATE255337T1 (en) |
| BR (1) | BR9804311A (en) |
| CA (1) | CA2249816C (en) |
| DE (2) | DE19748072A1 (en) |
| ES (1) | ES2210641T3 (en) |
| HK (1) | HK1019187A1 (en) |
| HU (1) | HUP9802498A3 (en) |
| MX (1) | MXPA98008941A (en) |
| PL (1) | PL329434A1 (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006027597A1 (en) * | 2006-06-13 | 2007-12-27 | Hauni Maschinenbau Aktiengesellschaft | Method for operating a stranding machine and stranding machine |
| US8613284B2 (en) | 2008-05-21 | 2013-12-24 | R.J. Reynolds Tobacco Company | Cigarette filter comprising a degradable fiber |
| US8375958B2 (en) | 2008-05-21 | 2013-02-19 | R.J. Reynolds Tobacco Company | Cigarette filter comprising a carbonaceous fiber |
| WO2009157240A1 (en) * | 2008-06-25 | 2009-12-30 | 日本たばこ産業株式会社 | Smoking article |
| US8119555B2 (en) | 2008-11-20 | 2012-02-21 | R. J. Reynolds Tobacco Company | Carbonaceous material having modified pore structure |
| US8511319B2 (en) | 2008-11-20 | 2013-08-20 | R. J. Reynolds Tobacco Company | Adsorbent material impregnated with metal oxide component |
| DE102009022759A1 (en) * | 2009-05-26 | 2010-12-02 | Hauni Maschinenbau Ag | Preparation of a filter material strip of the tobacco processing industry |
| WO2011070639A1 (en) * | 2009-12-07 | 2011-06-16 | 日本たばこ産業株式会社 | Powder adding device and adding method thereof |
| US20110271968A1 (en) | 2010-05-07 | 2011-11-10 | Carolyn Rierson Carpenter | Filtered Cigarette With Modifiable Sensory Characteristics |
| KR101288805B1 (en) * | 2010-07-16 | 2013-07-23 | 주식회사 케이티앤지 | Cigarette to add solid type menthol and Method to add thereof, Cigarette case |
| US8720450B2 (en) | 2010-07-30 | 2014-05-13 | R.J. Reynolds Tobacco Company | Filter element comprising multifunctional fibrous smoke-altering material |
| CN102217799A (en) * | 2011-05-18 | 2011-10-19 | 滁州卷烟材料厂 | Cigarette filter containing vitamin micro-particles and production method thereof |
| DE102011117614A1 (en) * | 2011-11-04 | 2013-05-08 | Björn O. Sörensen | Cigarette filter with organic acids |
| EP2925168A1 (en) * | 2012-11-29 | 2015-10-07 | Philip Morris Products S.A. | Method and apparatus for introducing a metered amount of particles into a continuous flow of material |
| CN103653243B (en) * | 2013-12-04 | 2015-08-19 | 上海烟草集团有限责任公司 | The filter-stick forming device of multi-functional adding material |
| DE102015108252A1 (en) | 2015-05-26 | 2016-12-01 | Hauni Maschinenbau Gmbh | Method and device for producing a multi-segment filter |
| US10512286B2 (en) | 2017-10-19 | 2019-12-24 | Rai Strategic Holdings, Inc. | Colorimetric aerosol and gas detection for aerosol delivery device |
| DE102022116185A1 (en) | 2022-06-29 | 2024-01-04 | Körber Technologies Gmbh | Machine and process in the tobacco processing industry for producing a rod or paper filter and use of the machine |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3017309A (en) * | 1957-02-21 | 1962-01-16 | Eastman Kodak Co | Method for the manufacture of filters composed of cellulose acetate |
| CH372235A (en) * | 1959-07-06 | 1963-09-30 | Ver Tabakfabriken Ag | Filters for smokers' goods with at least two different sections arranged one behind the other as well as a method for its production and a device for carrying out the method |
| US3390039A (en) * | 1964-10-09 | 1968-06-25 | Eastman Kodak Co | Method and apparatus for making additive filters |
| JPS60216843A (en) * | 1984-04-03 | 1985-10-30 | Patent Puromooto Center:Kk | Catalytic filter for oxidizing reducing gas |
| DE3820089A1 (en) | 1988-06-13 | 1989-12-14 | Bat Cigarettenfab Gmbh | METHOD FOR IMPREGNATING FIBERS OF A TOBACCO FUEL FILTER WITH DI- OR POLYCARBONIC ACIDS OR. ANHYDRIDES THERE |
| DE3904239C1 (en) | 1989-02-13 | 1990-05-17 | B.A.T. Cigarettenfabriken Gmbh, 2000 Hamburg, De | |
| JP2946236B2 (en) * | 1990-10-24 | 1999-09-06 | 株式会社三條機械製作所 | Method and apparatus for manufacturing cigarette filter rod |
| FR2696080B1 (en) * | 1992-09-30 | 1994-12-23 | Jesus Covarrubias | Cigarette filter for administration of taurine by inhalation. |
-
1997
- 1997-10-30 DE DE19748072A patent/DE19748072A1/en not_active Withdrawn
-
1998
- 1998-10-07 AT AT98118905T patent/ATE255337T1/en not_active IP Right Cessation
- 1998-10-07 ES ES98118905T patent/ES2210641T3/en not_active Expired - Lifetime
- 1998-10-07 DE DE59810322T patent/DE59810322D1/en not_active Expired - Fee Related
- 1998-10-07 EP EP98118905A patent/EP0913100B1/en not_active Expired - Lifetime
- 1998-10-08 CA CA002249816A patent/CA2249816C/en not_active Expired - Fee Related
- 1998-10-28 MX MXPA98008941A patent/MXPA98008941A/en not_active IP Right Cessation
- 1998-10-29 HU HU9802498A patent/HUP9802498A3/en unknown
- 1998-10-29 KR KR1019980045794A patent/KR100335469B1/en not_active IP Right Cessation
- 1998-10-29 BR BR9804311-0A patent/BR9804311A/en not_active IP Right Cessation
- 1998-10-30 PL PL98329434A patent/PL329434A1/en unknown
- 1998-10-30 CN CN98123688A patent/CN1112140C/en not_active Expired - Fee Related
- 1998-10-30 JP JP10311492A patent/JP3037937B2/en not_active Expired - Fee Related
-
1999
- 1999-10-04 HK HK99104292A patent/HK1019187A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11239472A (en) | 1999-09-07 |
| CN1216691A (en) | 1999-05-19 |
| ATE255337T1 (en) | 2003-12-15 |
| HK1019187A1 (en) | 2000-01-28 |
| PL329434A1 (en) | 1999-05-10 |
| EP0913100A2 (en) | 1999-05-06 |
| DE59810322D1 (en) | 2004-01-15 |
| EP0913100A3 (en) | 2000-08-23 |
| HU9802498D0 (en) | 1998-12-28 |
| DE19748072A1 (en) | 1999-05-12 |
| MXPA98008941A (en) | 2002-03-14 |
| HUP9802498A2 (en) | 1999-06-28 |
| BR9804311A (en) | 2000-03-08 |
| ES2210641T3 (en) | 2004-07-01 |
| KR100335469B1 (en) | 2002-11-30 |
| HUP9802498A3 (en) | 2000-07-28 |
| CA2249816A1 (en) | 1999-04-30 |
| KR19990037495A (en) | 1999-05-25 |
| JP3037937B2 (en) | 2000-05-08 |
| EP0913100B1 (en) | 2003-12-03 |
| CN1112140C (en) | 2003-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |