DE2057282A1 - Device, in particular a cigarette, for smoking a strand of smokable material - Google Patents

Description

The invention relates to a device, in particular a cigarette, for smoking a rod made of smokable material, in particular tobacco, with a rod made of smokable material

I give when smoking according to the progress of the smoking; Process progressively destructible envelope.

In such a device, when smoking, suction ! Primary combustion air at the intake end of the line by the combustion air generated by lighting at the other end of the line

ι zone headed. In the inner areas of the combustion zone I there is an oxygen deficit, so that incomplete combustion with dry distillation of the smokable material takes place there. The gas stream finally exiting at the suction end and sucked in by the smoker is loaded with that portion of the distillation and combustion products that has not been absorbed in the still unburned part of the strand (and possibly a downstream special filter). It is be-

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"Tl 20" 5 "7" 2 "8HZ

knows that in the smoking process described, combustion and distillation products get into the exiting smoke undesirable, detrimental to taste and / or harmful to health are, for example, nicotine, carbon monoxide, tar, tar derivatives and the like. It is also known that the concentrations such undesirable smoke components reduced

can be achieved by supplying secondary or secondary air! provides more complete combustion and / or dilutes and cools the smoke. In the simplest case, the secondary air is through openings provided in the sheath are sucked into the strand. In order to avoid an excessive dilution of the smoke, is it is known that the openings in the envelope are only near the Provide suction. However, this has the disadvantage that the effect of the secondary air is only in a dilution of the smoke exists, at a point where the smoke has already largely cooled, so that an additional condensation of Smoke ingredients caused by one of the secondary air Temperature reduction can no longer take place to a noticeable extent. To make better use of the secondary air, both to complete the combustion as well as to cool the still hot combustion products immediately after the combustion, it has also become known to provide openings in the envelope, which are sealed with a sealing material that becomes ineffective at elevated temperatures. This achieves that the secondary air supply through the envelope takes place only in the vicinity of the combustion zone. The one sucked in this way Secondary air mixes with the still hot smoke and cools the smoke, so that an increased proportion of the smoke ingredients through

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Condensation is deposited before the smoke passes through the still unburned remainder of the strand flows to the suction end «Although with this known measure the inflow of the secondary air in the takes place essentially concentrically to the combustion zone is the proportion of secondary air "which really is the hot" interior

* achieved, relatively low * This is due to the fact that in area j

■. ■! the combustion zone that is used to suck in the secondary air to the ver j associated pressure differences are only very small and therefore relatively large openings are formed in the envelope have to, so that a noticeable effect occurs at all. The ; The flow velocity of the incoming secondary air is' but very small «so that the secondary air is in the line * material is rapidly distributed and the deeper areas of the strand, where the oxygen deficit is greatest in the combustion zone, not reached. According to another older suggestion, they are Openings provided in the envelope are designed as valve flaps, which are opened under the influence of the approaching combustion zone Open and give the incoming secondary air a preferred direction. With that, on the one hand, a larger Inflow cross-section and, on the other hand, better bundling of the Secondary air can be reached, but also in this way the concentrations of the main harmful substances of interest can be reached Smoke components are only reduced by a maximum of 3o to Uo%. This is mainly due to the fact already mentioned that inevitably a considerable proportion of the secondary air introduced is only added to the smoke as dilution air, although it was not previously possible to counteract this dilution

Cooling and
Above the / incineration portion to reduce decisively. This is

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but necessary if you want to remove the unwanted ingredients of the ι Wants to reduce smoke more than before, without diluting the smoke to such an extent that it tastes bland and is rejected by the smoker will.

In the known or older embodiments described with openings provided in the casing which are only located below ; open to the influence of an approaching combustion process, ; it is also disadvantageous that the low pressure difference

/

• renz required large passage cross-sections the cigarette j relatively sensitive to dirt and rough handling

make development. In addition, there can be noticeable discontinuities j in the smoking process.

! The present invention is based on the task of providing a device

to provide processing of the initially stated kind, j from the described disadvantages of the known or prior devices is available and allows compared to a similar device without a secondary air supply for the significant reduction of undesirable smoke constituents without ds η smoke flavor unacceptable to flatten.

According to the invention, this object is achieved with a device of the type specified at the outset, which is characterized in that at least one secondary air duct extends along the strand over at least part of the length of the strand and is sealed against the suction end of the strand, to the other end of the strand is open and at its periphery against the strand of smokable material at least partially with sealing means

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is sealed under the influence of smoking on the strand gradually lose their sealing effect as the combustion process progresses.

j through the secondary air duct which is provided in the device according to the invention and which is open towards the end of the strand to be ignited J the secondary air can enter unhindered, so that even with the;

■ very small driving pressure differences in the area of the combustion zone are available, relatively large quantities

ι secondary air available. Since the secondary air ^duct: is sealed against both the suction and against the still unburned ^ strand of smokable material essentially ikönnen the verhältnimäßig mentioned large amounts of secondary air only occur in or near the combustion zone in the strand material, and there is the! Secondary air duct can put in the interior of the 'strand, it is easily possible that. secondary

j. '.. and / or their details. Environment

j air mainly in the inner areas of the combustion zone

■ supply where the oxygen deficit or the "temperature of the abdomen

is highest.

It has been shown that with the device according to the invention a decisive improvement with regard to the reduction of undesirable smoke ingredients can be achieved; there can be reductions of 5o or 6o% and more can be achieved without the smoky taste unreasonably flattened. This favorable result can be explained by the fact that in the device according to the invention the proportion the secondary air, which is only used to cool and dilute the smoke, more than before in favor of that part can be pushed back, which serves to complete the combustion and "to cool the hottest Rauehüonen. - 6 - ·" j

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A particularly simple embodiment of the invention The device is characterized in that the end of the secondary air duct which is closer to the suction end of the strand is closed. In this case, all of the secondary air enters the secondary air duct from the other end of the line. It has shown, that normally in the combustion zone and that left by it Ash cone the free cross-section formed by the secondary air duct is largely retained, especially when if the duct surface is stabilized with an appropriate means, so that the secondary air in the innermost part of the

can reach the combustion zone without having to pass the further outside

! lying parts of the combustion zone to a disruptive extent of acid

j substance to impoverish. In this embodiment, the cooling effect is

! the secondary air is less pronounced.

An even more favorable behavior, in particular also a better cooling effect, came about as a result in a further embodiment of the invention can be achieved, 4 * 8 of the secondary air duct in the area of his dem The suction end of the strand nearer the end has a connection to the outside air which is separate from the smoke suction path. Separated by this Connection to the Ai ^ Senluft can secondary air in the secondary air duct without having to walk past the combustion zone. This secondary air then reaches the inner areas of the combustion zone with its full oxygen content and relatively cold or their immediate surroundings. The one through the combustion zone In contrast, the proportion of secondary air flowing in from the front can be small are held «because in the remains of the secondary air duct in the outer areas of the combustion zone and in the ash cone ■. -6a-:

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there is greater flow resistance, for example due to! Ash particles. You can at least partially block this ^:

ι I

I!

of the front part of the secondary air duct intentionally, j for example by choosing an appropriate type of tobacco, ι ι avoidance of stabilizing agents in the surface of the

¹ secondary air duct, or using sealants that are used during ^:

; Smoking a barrier or even a closure in the secondary air duct build up.

: In the inventive device makes it basically ^no: difficulty governing the flow resistance of the secondary air duct sizes, particularly the channel diameter to match the desired secondary air supply and thereby require · derlichenfaü also to ensure that the secondary air supply with advancing smoking process in itself desired Changed in ways, for example increased. Another fundamental prerequisite

BATH ORIGINAt-

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part of the device according to the invention is that the) Secondary air duct at the most favorable point in the cross-section of the strand can be provided, in particular approximately in the axis of the strand, and that several secondary air ducts over the Cross section of the strand can be distributed.

! It has already become known repeatedly, in devices of the type specified above, in particular in cigars, longitudinal

Provide channels, but the decisive features for the beneficial effect of the device according to the invention are missing. For example, it is known to provide draw channels in cigars in the form of through channels which are simply molded into the strand, for example drilled into it, and are not sealed off from the strand. This has the disadvantage that the air entering through the passage channel when it is sucked in has no reason to preferentially flow through the inner regions of the combustion zone. In addition, some of the smoke generated reaches the suction end directly without filtering; this is disadvantageous for the temperature and the taste of the smoke emitted.

In another known cigar, in which a not completely continuous pull channel is provided , although a residual length of the rod used for filtering remains, the fundamental disadvantage of all through channels remains that. the air drawn in through the duct is not forced to flow through the combustion zone,

Refinements of the invention are given in the subclaims. Advantages of the invention and its configurations can also be found in the following description of exemplary embodiments.

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play in conjunction with the drawings, with all differing from

State of the art distinguishing features of the invention- '- ■

• Can be of lesser importance.

j -

'Fig. 1 is a schematic longitudinal section through an invention ; proper filter cigarette.

Fig. 2 is a similar longitudinal section to Fig. 1 through another Embodiment of a filter cigarette according to the invention.

Fig. 3 is one of FIG. 2 corresponding, but about the axis of Cigarette partially rotated by 90 ° of the suction-side end of the cigarette in the disassembled state.

FIG. 4 is an axial one viewed from the right in the sense of FIG. 3 Top view of the connector body shown in the middle of FIG.

, Fig-. 5 is one seen in the direction of arrow V in FIG

I '

Top view of the suction end of the illustrated in FIG Cigarette.

FIG. 6 explains, in a partial representation corresponding to FIG. 5, a modified embodiment .

Fig. 7 is a longitudinal section through another embodiment of a filter cigarette according to the invention.

Fig. 8 is a schematic longitudinal section through another embodiment.

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j implementation of a filter cigarette according to the invention.

FIG. 9 is a cross section along the line IX-IX of FIG. 8.

Fig. Io is a schematic partial longitudinal section through another Embodiment of a filter cigarette according to the invention.

11 illustrates another possible embodiment of a cigarette according to the invention in a schematic cross section.

Fig. 12 is a schematic partial longitudinal section of another embodiment of a cigarette according to the invention.

FIG. 13 is a schematic cross section along the line XIII-XIII of FIG. 12.

Fig. M is a schematic longitudinal section through another imple mentation form of a filter cigarette according to the invention.

iFig. 15 is a cross section along the line XV-XV of the FIG

j illustrated cigarette.

16 is a schematic partial longitudinal section through another embodiment of a device according to the invention.

Fig. 17 is a partial longitudinal section similar to Fig. 16 of a

another embodiment of a device according to the invention.

18 is a schematic view of an embodiment of a

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for the mutual delimitation of the line and the secondary air duct die-I end layer.

19 is a sectional view taken along line XIX-XIX of FIG Fig. 18.

; FIG. 2o is a sectional view corresponding to FIG. 19, showing |

however another embodiment one for mutual i Delimitation of secondary air duct and duct serving j layer.

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In the figures, cigarettes are shown as exemplary embodiments. It is understood, however, that the measures described, for example, on cigars and other devices for Smoking are applicable.

Fig. 1 shows in longitudinal section a filter cigarette with a strand 2 of tobacco or other smokable material which is surrounded by an environmental hüllung 4 _{. It consists of a material that is progressively destroyed when smoking in accordance with the progress of the smoking process, for example cigarette paper or a substance that has been sprayed onto the strand 2 in liquid form and has solidified into a cohesive film. To the

J the suction end of the strand 2 is a filter 6 in the usual manner

attached, which consists of a filter material 8, for example corrugated ί paper, and a filter sleeve Io. One on the filter sleeve

Io and the adjacent end of the envelope 4 glued-on connecting sleeve 12 connects the filter to the strand.

In the axis of the strand 2 there extends a secondary air duct m, the circumference of which is at least partially sealed against the strand of smokable material with sealing means which gradually lose their sealing effect under the influence of the combustion process progressing along the strand while smoking. Such sealing means are preferably formed by a layer 16 of combustible or heat-changeable material, which for example has properties similar to those of the material used for the envelope H. It is particularly easy to use a layer 16 which consists of a sheet-like cover.

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This sheet-like cover can preferably consist of smokable material, for example cigarette paper or tobacco foil. j Another possibility is that the secondary air duct 14 j confining layer 16 by using the strand material is a <

Binding to represent incoming substance. For example, in the manufacture of the cigarette shown in FIG. 1, initially formed the tubular tobacco rod 2 and then the inner surface of this rod with a cellulose acetate solution orer treated with a different binder until the desired seal results.

As can be seen from Fig. 1, is in the illustrated embodiment the end of the secondary air duct IU which is closer to the suction end of the strand 2 is closed by a

'■'' t

in the filter body 8 embedded closure body 18, which is sealingly inserted with an outwardly bulging surface in the end I of the secondary air duct 14, if strand 2 and filter 6 ^; be connected to each other. It goes without saying that instead of the closure body 18 other locking means can also be used.

In Fig. 1 the cigarette is shown in the partially smoked state. The combustion zone 2e> has approximately the shape indicated by the dashed line 22 and leaves the usual Ash cone 24. When smoking, air is sucked in by the negative pressure generated at the suction end of the strand 2, namely once in the usual way primary air, which in outer areas26 of the Combustion zone 2o occurs and the combustion zone 2o passes through

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flows until it is in the innermost areas 28 of the combustion; zone enters the still unburnt part of strand 2 and flows through this towards the suction end. This primary air is used for Maintenance of the combustion in the combustion zone 2ο and reijchert accordingly with the combustion products and forms the so-called mainstream smoke, which after filtering through 'the still unburned part of the tobacco rod 2 and possibly

further filtering is absorbed by the smoker. If this pri-

jmärluft reaches the inner area 28 of the combustion zone 2o,

j it is already largely depleted of oxygen, so that in the ! inner area 28 shows a typical incomplete combustion

{running, which is characterized by a significant oxygen deficit ■ is and is accompanied by a dry distillation of the tobacco.

In the case of the cigarette shown, however, air is also drawn in from the outside through the secondary air duct 1Λ; In the combustion zone 2o and in the ash cone 2 * \ , the cross-section of the secondary air duct m remains almost unchanged; the sealing effect of the layer 16 is only lost under the influence of the combustion, so that the secondary air, which is only partially involved in the combustion in the combustion zone 2o, passes through the inner areas with a relatively high oxygen content

^, inside 28 of the combustion zone flows into the strand 2 and offers these / areas of the combustion zone enough oxygen to make the combustion more complete there. In Fig. 1, primary air and secondary air are indicated by arrows 3o and 32, respectively. It can be seen that it is essential for the desired mode of operation that the sealing means separating the secondary air duct 1Λ from the strand 2 of smokable material under the influence of the combustion

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tion process lose their sealing effect. It is also essential that the secondary air duct 14 is sealed against the suction end of the strand; this prevents the smoke generated in the combustion zone directly, ie without filtering through the still
stopped strand 2, reaches the suction end of the strand.
The secondary air can only reach the suction end of the strand through the inner areas 28 of the expansion zone.

The embodiment of FIG. 2 corresponds for the most part to that.

Embodiment according to FIG. 1. An important difference is da-J rin that the secondary air duct 14 in the area of its suction end] of the strand 2 nearer end a separated from the primary air intake path

te connection 34 to the outside air, and that there is; ! Connection in the illustrated exemplary embodiment from one! transverse to the axis of strand 2 transverse channel 36, which in
a connecting body 38 attached to the suction end of the strand 2
is provided. The connection body 38 has a conically tapering [connection end 4o, which enters the end of the secondary air ^{duct 14 in a sealing manner when the strand 2 and connection body 1 are connected.} the
Connecting sleeve 12 has openings 42 here, which extend over the outer
Ends of the transverse channel 36 are arranged. Thus, as a result of the
connection to the outside air established by the transverse duct 36

additional secondary air in the j indicated by the arrows 44

Way enter the secondary air duct 14 and just like that of. Secondary air 32 coming in front (in Pig. 2 from the right) enter directly into the inner regions 28 of the combustion zone 20. In the connection between the connection end 40 and the layer 16 can
a binding agent such as gum arabic is also provided
be. -

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FIG. 3 explains the same cigarette as in FIG. 2, but in a longitudinal section illustration rotated by 90 with respect to FIG

with separate parts, the connecting sleeve 12 is omitted. It can be seen that here the connection body j

j!

by 38 forms a separate component, which between the strand 2; j and the filter 6 is inserted. The smoke channels 46 provided in the connection body 38 can also be seen in FIG.

I ι

iden passage of the smoke from the line 2 to the filter 6 allow.

It is also readily apparent that the filter 6 can also be replaced by a simple mouthpiece or even left out entirely

FIG. 4 shows an axial plan view of the connection body 38 shown in FIG. 3. Furthermore, the section line ΙΙΙ-ΙΙΓ, which corresponds to FIG. 3, is indicated in FIG. In the connection body shown, a total of six smoke ducts 46 are provided which ^! are separated from one another by narrow webs 48. In many cases, the bars can also be left out. The connection body 38 can

consist of a wide variety of materials, for example paper molding compound, Plastic and the like. The professional will not only

'The choice of a suitable material is easy, but rather he

.will also be able to use other constructive options j to find the suction end of the jStranges 2 nearer end of the secondary air duct 14 via a from

'' Smoke suction path to connect a separate connection with the outside air
the.

FIG. 5 is a view seen in the direction of arrow V of FIG the left end of the cigarette in Fig. 2 and shows that

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preferably the opening 42 in the connecting sleeve 12 in the circumferential direction is dimensioned somewhat larger than the circumferential width of the outer ends of the transverse channel 36. This facilitates the assembly | add the connecting sleeve 12 to the filter 6 and the strand 2.> It is also possible to place the connecting sleeve 12 in that axial region which lies over the outer ends of the transverse channel 36 comes to perforate over the entire circumference so that each -1 the rotational position of the connecting sleeve 12 relative to the connecting body

38 results in a continuous connection to the outside air.

! FIG. 6 explains in the same representation as FIG. ; Approximate form in which the connection formed by the transverse channel 36 has adjustable throttle means for the outside air, namely: in the form of a sleeve 50 which is rotatable and / or slidable over that axial region of the cigarette is arranged where the outer ends of the connection to the outside air lie. In the sleeve 50

vorzugwei se wedge-shaped passage openings 52 / are provided which, depending on the position of the sleeve relative to the cigarette, throttle the connection to the outside air to a greater or lesser extent. In this way, the secondary air inflow can be influenced arbitrarily, so that it is possible for the smoker, for example, to make the combustion more or less complete, and thus the taste of the smoke, as desired

A mark 51 and a scale 53 are preferably provided. Furthermore, it is also possible to make the throttle means adjustable with the aid of a filter body which is rotatable with respect to the strand 2.

FIG. 7 shows a longitudinal section view corresponding to FIG. 2 a filter cigarette, which basically corresponds to the cigarette shown in Figure 2, but a secondary air channel

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14 has, which expands towards the suction end of the strand 2.! This embodiment shows quite generally that it is possible i the decisive for the flow resistance of the secondary air duct, Sizes, especially the duct diameter, to adapt to the desired secondary air supply, also so that when smoking a certain, desired change in the secondary air supply takes place. In the embodiment shown in FIG. 7, for example the secondary air sucked in through the transverse channel 36

32 flow in relation to primary air flow / as it progresses Smoking the cigarette enlarged. In this way one can take into account the fact that those in the as yet unburned part of the Tobacco rod 2 condensed smoke components pass more and more into the smoke and become one as the smoking process progresses undesirable increase in harmful smoke components. The described increase in the secondary air supply affects this Counteracting the effect.

In Fig. 7 it is also indicated that a support material 54 can be provided in the secondary air duct 14. Through this support material it is prevented with certainty that the relatively high radial forces applied to the strand 2 when the sheath 4 is applied the secondary air duct 14 is deformed or damaged. In order to disturb the function of the secondary air duct 14 as little as possible, care must be taken that the support material has an im Compared to the strand material represents a small flow resistance. Furthermore, it is desirable that the support material enhances the taste and quality of life To change the usage properties of the cigarette as little as possible; it is therefore advantageous to use as a support material

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to use smokable material, for example one in comparison to strand 2 coarsely structured tobacco or a loose egg relatively stiff artificial material, which for example] / Ln

. known way can consist of tobacco dust and a binder such as cellulose acetate. The latter option is particularly advantageous because it is a support material; acts, which loses its cohesion in a given temperature range below the actual combustion temperature. Other materials with similar properties have already become known in smokable objects, so that there is basically no difficulty in selecting a support material that loses its cohesion in a given temperature range between room temperature and the temperatures prevailing in the combustion zone of the strand when smoking. Substances of this type can also be used with advantage to produce the sealing means which seal the secondary air duct 14 with respect to the strand 2; these sealing means are shown generally as sealing layer 16 in the figures. Using such sealing means, it is possible to destroy the seal between the secondary air passage 14 and line 2 not only by combustion of the layer 16, but a little earlier, ie combustion zone at a predetermined distance from the encryption>. This obviously has the advantage that the secondary air supplied from the secondary air duct 14 can enter the inner regions 28 of the combustion zone in a somewhat widened and more uniform flow. Also, you can do this this way

achieve that a larger proportion of the secondary air

channel 14 brought in the secondary air to the combustion and distillation • - 19 -

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lation products immediately after their formation as a dilution ": and cooling air is added.

The modes of action described so far, in particular the mode of action of the cigarette shown in Fig. 2, in which a \

Secondary air duct extends approximately in the axis of the strand, can

also realized with differently arranged secondary air ducts j ι j

will. For example, it is possible that at least one ^:

j Secondary air duct in the area of the outer circumference of the strand

is provided, and in particular, it appears advantageous to divide the I whole cross section of the strand by the arrangement of several "j over the cross section of distributed secondary air channels more to I, thereby to obtain a more intense and more uniform supply \ of secondary air over the entire combustion zone. '

As an example of such possibilities, FIGS. 8 and

i 9 schematically a filter cigarette in longitudinal section or transverse

j cut, in which several secondary air ducts 14 in the area of the ι outer circumference of the strand 2 distributed over the circumference of the strand are. The secondary air channels 14 go lengthways into the Depth of the strand, so that the secondary air in the desired manner in the more inner areas of the combustion zone 2o can get. This mode of action is shown in FIGS. 8 and 9

j immediately apparent. Each of the four secondary airi channels 14 is just like the secondary air channel 14 of FIG j sealed against strand 2 with the aid of a layer 16. Furthermore, as in the exemplary embodiment according to FIG. 2, j is each secondary air duct 14 in the region of its end closer to the suction end of the strand 2 via a connection separated from the smoke suction path with the

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209825/021 0

Outside air connected. These separate connections to the outside air

arise when assembling the cigarette with the help of a connection! j ■. .
body 38, which has a central smoke channel 46 as well as four connecting ends 40 stunted to form recesses, which come into sealing engagement with the ends of the secondary air channels 14.

JAs connections to the outside air are similar to the execution!

i ι

Jrungform provided according to Fig. 2 transverse channels, of which in Fig. 8! only. two transverse channels 36 can be seen; These transverse channels here simply consist of corresponding openings in the casing 4 and openings 42 located above them in the connection; ^! sleeve 12.

jFig, Io shows an even simpler embodiment, where the

'Transverse channels or openings 36 are moved a little further to the front so that they are no longer covered by the connecting sleeve 12; in this case the openings 42 in the connecting sleeve 12 are no longer required. ^!

In 'the right half of Fig. 8 is another advantageous one [Modification indicated, which is characterized jist that the external secondary air ducts 14 over their length

have distributed connections to the outside air, in the form of perforation openings 56. These perforation openings, the

generally facilitate the entry of the secondary air are special (This is advantageous if the [Secondary air ducts 14 are filled with a support material.

further

Filling the secondary air duct with support material is / is special advantageous when the secondary air duct has a relatively

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has a moderately large cross-section. This applies, for example, to: if the in FIGS. 8 and 9 further illustrated embodiment a modification is made to the embodiment indicated in the cross section of FIG. 11, in which a secondary air duct 14 forms the strand 2 surrounds sleeve-shaped. A folded sheet-like support material 54 is indicated in FIG. 11.

The FIGS. 12 and 13 show schematically in longitudinal section and

one

Cross-section / further embodiment in which as in the embodiment according to FIGS. 8 and 9 four external secondary air ducts 14 are provided. Instead of the perforation openings However, use is made here of the idea that external secondary air ducts over at least part of their length can be open to the outside air. Accordingly, in the embodiment according to FIGS. 12 and 13 the secondary air ducts provided in the form of slots extending deep into the strand 2. The casing 4 of the strand and the to seal the secondary air ducts 14 against the layers 16 serving the strand 2 a uniform enveloping body of moderately complicated cross-sectional shape. The production of such a cigarette can be done, for example, that from Tobacco flour

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and a binding agent, a dimensionally stable strand 2 with the cross section shown in FIG. 13 is formed and then provided on its outside with the sealing enveloping body 4, 16. For this purpose, for example, a solution or suspension I made of cellulose, paper, cellulose acetate, starch or similar materials can be sprayed onto the outside of the preformed strand 2.

The FIGS. 14 and 15 show schematically in longitudinal section and cross-section, respectively an embodiment in which similar to the variant According to FIG. 11, a secondary air duct 14 forms the strand 2 in the form of a sleeve surrounds. In this embodiment, the secondary air

: channel 14 made relatively large. In this case, it is advisable to provide the secondary air duct 14 with a smokable support

. material, such as tobacco, to be filled in. It can be seen without further ado that the support material is also smoked when smoking will. If the flow resistance in the secondary air duct 14 as a result of the smokable support material available there is so large,

₍ that the flow of the secondary air through the

; borrowed transverse channels 36 and openings 42 is too small, recommends it is appropriate to use the perforations 56 shown in FIG. 8,

^! as shown in the right half of FIG. When smoking, these perforations ensure a sufficiently large admission of secondary air to the inner regions 28 of the combustion zone 2o. As a result of the flow resistance of the smokable support material located in the secondary air duct 14, those perforations 56 are then preferred or even exclusively take over the supply of the secondary air which are - 23 -

209 8 25/02 10

. each in the vicinity of the inner region 28 of the combustion zone are located. The same effect as with the perforations 56 can of course be achieved if one for the outer casing 4 a permeable or porous material, e.g. porous

ί cigarette paper, used. It is also clear that when using the perforations 56 or corresponding measures on the transverse channels 36 and openings provided at the suction end

; can do without. A particularly simple one then results Structure of the in FIGS. IH and 15 illustrated cigarette, the is characterized in that a filled with smokable material, the main strand 2 concentrically surrounding secondary air duct 14 is provided, which is sealed against the suction end of the strand, at its end facing the combustion zone is open, is air-permeable in the outer casing 4 and on its circumference resting on the main strand 2 with the aid of the Smoking progressively destroyed layer 16 is sealed. In this particularly simple embodiment, you also need only a very simple connector body 38, which can easily be used as a loading

part of a filter or mouthpiece can be formed ■ and essentially consists of a circular disk with a central smoke channel 46. Another interesting option is there in providing various smokable materials in the main strand 2 and in the secondary air duct 14. For example, in

^1. Main strand a relatively "light" tobacco and in the secondary

air duct 14 a relatively "heavy" tobacco can be used.

The intended effects, especially the improvement of Air supply to the inner areas of the combustion zone,

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can be further funded through additional measures. Such a measure consists in providing transversely extending additional channels in the string at least in a part of the region of the string which is adjacent to the secondary air channel. This results in. ' a greater breakdown of the combustion zone and a better supply of secondary air. In a representation corresponding to FIG. 2 i, FIG. 16 shows a central secondary air duct 14} j in a branch 2. J additional ducts 58, which are connected to the secondary air duct 14, extend laterally from the secondary air duct m. Correspondingly, the sealing layer 16 extends _; also-around these additional channels 58. As indicated in FIG. 16, several rows of additional channels 58 can be distributed over the circumference of the secondary air channel 14. In Fig. 16, the additional channels 58 are shown with a slope that runs from the outside inward in the direction of the suction end. This is used to adapt to the shape of the combustion zone as shown in FIGS. 1, 2,

8 and IU is shown. In general, however, raj Dia additional channels are used, and in some cases it is even expedient to use a reverse inclination as in FIG use, in particular when the supplied secondary air to a considerable extent serve to dilute and / or cool the smoke generated.

In a representation similar to FIG. 16, FIG. 17 explains another embodiment, in which, however, the additional channels 58 from Secondary air duct 14 are separated; this is clearly made easier the production. The intended effect, however, is essentially the same as the embodiment of FIG. 16 because

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2057Z82—

When the combustion zone 2o approaches, the layer 16 sealing the secondary air duct loses its sealing properties and a connection is thus established between the secondary air; channel IH and the * additional channels 58 just captured by the combustion zone 2o. In this embodiment, the additional channels 58 do not need to be sealed off from the string 2 _; thus have permeable walls. In the simplest case, such additional channels are incorporated in the manufacture of the strand . forms. For example, appropriately shaped needles or mandrels can be pierced into the strand, and a liquid or a solution of a binding agent can also be added to prevent the additional channels produced from closing again after the tool has been withdrawn; the liquid or solution is selected so that the walls of the additional channels 58 produced solidify in the desired manner without a cohesive, sealing layer being formed. Instead of the additional radial channels shown in FIG. 17:; 58 inclined additional channels can of course also be used, for example with a similar inclination as the additional channels according to FIG.

Γ In some cases it can be useful to use the secondary air duct : to be delimited and sealed against the strand of smokable material by a layer of particularly good mechanical strength. This is especially the case if one wants to use a particularly tightly pressed tobacco rod, however does not want to have any support material in the secondary air duct.

209825/0210

~ · - 2057252

In such cases it can happen that even under the influence

_: I.

the combustion zone does not fully achieve the sealing effect of the layer:

is constantly lost, so that it seems expedient to use special j

Measures to be taken in spite of such difficulties; sufficiently strong permeability of the layer in the area of the ^! Ensure combustion zone. For this purpose, the layer delimiting the secondary air duct can be provided with openings which are normally closed with closure means, these closure means being such that, under the influence of the approaching combustion process, they at least partially open the openings and thus the desired free one j

ι Cross-section for the passage of secondary air from the secondary;

Create an air channel in the strand of smokable material. In the i Figs. 18 and 19 is a very schematic view and section, respectively.

a secondary air duct 14 delimiting layer 16 is shown, which consists of a j There is a bare material and flap-like incisions 6o open

has, which serve both as openings and closure means j and when approaching the progressive smokers ί Open the combustion zone by deforming the layer. The mechanical tension required for this is generated by the fact that the '

ι Layer of two individual layers 62, 64 of different thermal . Expansion properties consists, in the simplest case, of two different types of paper. As in the schematic sectional; The illustration in FIG. 19 can be created in this way

j • aims to be in the vicinity of an approaching combustion zone 2o the areas of the double layer separated by the flap-like incisions 6o bulge inward

- 27 -

209825/0210

and expose correspondingly large openings 66. In the areas outside of the flaps formed by the incisions 75 , the mechanical stresses that also arise as a result of the approach of the combustion zone 2o lead at most to slight deformations which do not further impair the desired function. It is clear that the deformation described can also be achieved in that a two-layer structure is provided only in the area of the flap-like incisions 6o. In general, however, it is easier to use a layer 16 consisting of a total of two individual layers.

FIG. 2o shows another embodiment in a representation corresponding to FIG. 19. This is used to delimit and seal a secondary air duct compared to a strand of smokable material uses a simple layer 16 in which Openings 68 are pre-formed for the passage of the secondary air. As a closure means for these openings is on the layer 16 i a sealing material 7o applied, which is such that it is in a predetermined temperature range between room temperature and the temperatures prevailing in the combustion zone 2o when the strand is smoked loses its cohesion. This is indicated in FIG. 2o at the right opening 6 8. As Also shown there, a secure closure of the opening 68 can be achieved especially when the closure material is applied so that it fills the openings 68 substantially. A closure material of the type described can also be used in the embodiment according to FIGS. 18 and 19 are also used

will.

In the above description is repeated of materials the speech made under the influence of

209825/02 10

long progressive combustion process their mechanical Should lose cohesion or their sealing effect. Such Substances are known in the art of making cigarettes and cigarette paper. Cellulose products are particularly suitable, for example ethyl cellulose (softening range, for example 9o to mo ° C), cellulose acetate (softening range 60 to 13o ° C), Polyethylene, sugar, starch paste and other non-toxic substances, such as monosodium phosphate or menthol.

It may also be desirable to reduce the burn rates of the to coordinate the materials used. For example, in the embodiments according to FIGS. 8, Io and IH be appropriate in the areas outside of the primary air intake way for a greater burning rate of the existing ones Materials to provide. These include, for example, the outer casing 4 and / or an optionally in the secondary air duct In the art dealing with smokable material it is known how to reduce the burn rate can influence; corresponding measures are also available for the!

i devices described here applicable. Just as an example, let I.

mentions the well-known possibility of using a material that is faster,

should burn »with an oxygen carrier, for example saltpeter, j

to impregnate.

Other embodiments are possible without departing from the scope of the invention.

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Claims (1)

Claims Device, in particular cigarette, for smoking a strand made of rough material «especially tobacco, with a den Surrounding strand of roughable material, progressing during roughing according to the progress of the smoking process Destructible casing, characterized in that at least over part of the length of the strand (2) a secondary air duct (14) extends along the strand, the is sealed against the suction end of the strand, is open towards the other end of the strand and at its periphery is at least partially against the strand of smokable material is sealed with sealing means, which gradually lose their sealing effect under the influence of the combustion process progressing along the strand when smoking. 2. Apparatus according to claim 1, characterized in that the the suction end of the strand (2) ntlher end of the secondary air; i channel (14) is closed (Pig. I). BAD ORtQtHAL -2- 209825/0210 3 · Device according to claim 1, characterized in that the Secondary air duct (14) in the area of its the suction end of the Strand (2) nearer end a separate from the smoke suction path Has connection to the outside air (Figs. 2-8, 10.14). 4. Apparatus according to claim 3 »characterized in that the \ connection to the outside air is at least one transverse channel (36) running transversely to the axis of the strand (2) (FIGS. 2-8,10,14) 5. Device according to claim 5 or 4, characterized in that that the connection to the outside air adjustable throttle means has (Fig. 6) I. 6. Apparatus according to claim 4 or 5, characterized © indicates that the throttle means is located above the outer end of the connection to the outside air and is movable relative to the line (2) Have sleeve (50) which with the outer end of the connection has passage openings (52) which can be brought to overlap (FIG. 6). 7. Device according to one of claims 3-6, characterized in that the connection to the outside air is provided in a connection body (38) attached to the suction end of the strand (2) and a connection body (38) when connecting the strand (2) and connecting body (38) mi $ the secondary air duct (14) in connection with connection 4 * Äf§de C ¹ * ⁰ ) (Figs. 2,3,4,7). BATH ORIGINAL 209 8 25/0210 8. Apparatus according to claim 7, characterized by an as Connection body formed filter. 9 · Device according to one of the preceding claims, characterized in that; characterized in that a support material (54) is provided in the secondary air duct (14) and that the support material has an i Compared to the strand material represents a small flow resistance (FIGS. 7, 11). 10. The device according to claim 9, characterized in that the support material (54) is a smokable material, for example ^ψ Tobacco or a material containing tobacco. 11. The device according to claim 10, characterized by a support material, that in a given temperature range between room temperature and that when smoking in the combustion zone en (20) of the strand (2) prevailing temperature / its cohesion loses. 12. Device according to one of the preceding claims, characterized in that the AD sealing means a secondary air duct (14) delimiting layer (16) made of combustible material or material that can be changed by heat (FIGS. 1, 2, 8, 14, 17, 19, 20). BATH ORIGINAL 209825/0210 __ _J35? Device according to claim 12, characterized in that the the secondary air duct (14) delimiting layer 06) a substance which forms a bond with the strand material is formed. i 14. The device according to claim 12, characterized in that I ' the layer delimiting the secondary air duct (14) j is sheet-like envelope. ! 15 · Device according to claim 14, characterized in that the i sheet-like cover made of smokable material, for example \ wise made of cigarette paper or tobacco foil. 16. Device according to one of the preceding claims, marked characterized by sealing agents that reduce their sealing effect I lose as soon as the combustion zone (20) to them has approached a predetermined distance to about \. ; 17 · 'device of claim 16, claims in conjunction with one of arrival \ 12 to 15, characterized in that the secondary ■ the air duct (14) defining layer (l6) openings (66,68) has aufi, and that the openings closed with locking means! are under the influence of the approaching combustion i. Process at least partially clear the openings (Pign. ; 18-20) 18. Apparatus according to claim 17, characterized in that the layer (l6) delimiting the secondary air duct consists of one. 209 825/02 10 material which can be placed under mechanical tension by heating, for example a paper, which at least regionally has two individual layers (62,64) of different thermal expansion properties, and that as Openings and closure means flap-like incisions (60) j are provided, which when approaching when smoking! advancing combustion zone (20) by deformation of the j Layer (16) Sffen (FIGS. 18, 19). 19 · Device according to claim 17 or 18, characterized by that the closure means comprise a closure material (70) which is in a predetermined temperature range between room temperature and the temperatures prevailing in the combustion zone when the strand is fumed off loses (Flg. 20). 20. Apparatus according to claim 19 *, characterized in that dasi Closure material (70) substantially fills the openings (68) (FIG. 20). 21. Device according to one of the preceding claims, characterized characterized in that at least part of the area of the strand adjacent to the secondary air duct (14) is loaded transversely Additional channels (58) are provided in the strand (2) (FIGS. 16, 17). -6- 2 09825/0210 ■? ■■■■ -. ■ ".... J 22. The device according to claim 21, characterized in that :. the additional ducts branch off to the side of the secondary air duct. (Fig. 16). : 23. Vorrichtun - according to claim 22, characterized in that the additional channels (58) separated from the secondary air channel (14) are (Pig. 17). 24. Apparatus according to claim 22, characterized in that the additional channels (58) have permeable walls (Fig. 17) 25. Device according to one of the preceding claims, characterized characterized in that the for the flow resistance of the secondary air duct (14) the relevant parameters, in particular the duct diameter, correspond to the desired secondary air supply. 26. Device according to one of the preceding claims, characterized characterized in that the secondary air duct (14) accordingly a desired change in the secondary air supply when smoking is dimensioned (Fig. 7) 27. Device according to one of the preceding claims, characterized characterized in that a secondary air duct (14) extends approximately in the axis of the strand extends (Figs. 1,2,7) · 28. Device according to one of the preceding claims, characterized characterized in that several secondary air channels across the cross-section of the strand are distributed. 209825/0210 BAD ι -jT- 36 ; j 29 · Device according to one of the preceding claims, characterized in : characterized in that at least one secondary air duct (14) j is provided in the region of the outer circumference of the strand; (Figs. 8,9) ι JiO. Device according to claim 29, characterized in that several secondary air ducts (14) are distributed in the area of the outer circumference of the strand (2) over the circumference of the strand (2) (Figs. 8,9,12,15). . 31. Device according to one of the preceding claims, characterized in that a secondary air duct (14) surrounds the strand (2) in the form of a sleeve (FIGS. 11,14,15). 32. Device according to one; of claims 29 to 31, characterized in that da;.: 'the external secondary air duct (14) distributed over its length connections, for example per- ; foration openings (56) to the outside air (Fig. 8). , 33 · Device according to one of claims 29 to 31 »thereby ge-I indicates that the external secondary air duct (14) towards the outside air over at least part of its length is open (Figs. 12, 13). BATH 209825/0210