CA1334817C - Envelope for a dimensionally stable tobacco portion - Google Patents
Envelope for a dimensionally stable tobacco portionInfo
- Publication number
- CA1334817C CA1334817C CA 582071 CA582071A CA1334817C CA 1334817 C CA1334817 C CA 1334817C CA 582071 CA582071 CA 582071 CA 582071 A CA582071 A CA 582071A CA 1334817 C CA1334817 C CA 1334817C
- Authority
- CA
- Canada
- Prior art keywords
- envelope
- tobacco
- fibers
- cigarette
- woven fabric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D1/00—Cigars; Cigarettes
- A24D1/02—Cigars; Cigarettes with special covers
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
- A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
- A24C5/40—Hand-driven apparatus for making cigarettes
Landscapes
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
Abstract
Envelope for a dimensionally stable tobacco portion matched with the tobacco-receiving volume of a cigarette, in particular a filter tip cigarette, said envelope consisting of a completely smokable material and being permeable to air to an extent that the tobacco portion as such is unsmokable and becomes smokable only after being tightly wrapped into cigarette paper or the like. In order to enhance the optical acceptance and to avoid any changes in flavor, the envelope is formed by a non-woven fabric predominantly produced from tobacco plant fibers so that practically the complete tobacco portion consists of smokable tobacco.
Description
ENVELOPE FQR A DIM~NSIQNALLY ~TARr,E TO~AÇCQ PQRTIO~
DESCRIPTION:
The present invention relates to an enve~ope for a dimensionally stable tQbacço portion as well as to a tobacco portion wrapped into such an envelope.
For a long time, many different forms and ways have been known to the consumer on how to make his Gigaret~-es. This applies mainly to the so çalled rolling of cig~rette.s, using sheets of cigarette paper with an adhesive edge gumming.
Cigarette rolling requires a çertain manllal skill and is time-çonsuming. Even with skilled çigarette rQllers the cigarettes vary considera~ly in terms of siæe, packing and filling over the cigarette length so that they are only a primitive .substitute of indu.strially manufactllred cigarettes.
Another advantage is the unavoidahle çrumh~ing of tobaçcQ
which redu~es the tokacGo yield. The same prohlems, even though to a reduçed ext-ent, axise when rolling deviçes are used.
~W
DESCRIPTION:
The present invention relates to an enve~ope for a dimensionally stable tQbacço portion as well as to a tobacco portion wrapped into such an envelope.
For a long time, many different forms and ways have been known to the consumer on how to make his Gigaret~-es. This applies mainly to the so çalled rolling of cig~rette.s, using sheets of cigarette paper with an adhesive edge gumming.
Cigarette rolling requires a çertain manllal skill and is time-çonsuming. Even with skilled çigarette rQllers the cigarettes vary considera~ly in terms of siæe, packing and filling over the cigarette length so that they are only a primitive .substitute of indu.strially manufactllred cigarettes.
Another advantage is the unavoidahle çrumh~ing of tobaçcQ
which redu~es the tokacGo yield. The same prohlems, even though to a reduçed ext-ent, axise when rolling deviçes are used.
~W
- 2 - 1~34817 Similar considerations apply to the other fundamental type of cigarette production by the consumer, i.e. the filling of cigarettes by means of more or less comfort-able devices designed to introduce a defined tobacco quantity into empty cigarette tubes which are usually provided with a filter tip.
Compared to these conventional methods, the method ac-cording to the applicant's European Patent EP-A 155 514 entails a distinct advance, which is characterized by a tobacco product comprising a dimensionally stable tobacco portion matched with the tobacco filling of a finished cigarette, whose envelope is formed by a wrapping of completely smokable material and is per-meable to air to an extent that the tobacco portion as such is not suited for smoking and becomes smokable only after its envelope has been tightly wrapped with cigarette paper or the like. A tobacco product of simi-lar design is suggested by the European Patent EP-A
178 605 whereof a preferred embodiment has a tobacco portion diameter which is slightly smaller than the inside diameter of the cigarette paper tube of the fi-nished cigarette so as to facilitate the introduction of the tobacco portion into the prefabricated cigarette paper tube. For this reason, the user is required sub-sequently to manipulate the diameter of the tobacco portion mechanically so as to achieve the close fitting of the tobacco portion against the cigarette paper, which is required for smoking.
The solutions mentioned last mainly propose the use of perforated cigarette paper or perforated tobacco wrapper for the envelope of the tobacco portion, the _ 3 _ 1 33~ 81 7 latter wrapping material being a paper support material onto which tobacco dust is bonded so as to create a continuous tobacco dust layer. Both wrapping materials, however, are characterized by paper which is unneces-sary for smoking and, in the case of the tobacco wrap-per, by an additional unnecessary bonding agent for the tobacco dust, which both lead evidently to an adul-terated flavor. Moreover, such wrappers are not ideal in terms of appearance and tight fitting of the tobacco portion inside the cigarette paper tube. In particular, the smoker cannot avoid smoking more paper and possibly even more of the bonding agent than this would normally be the case.
The present invention is therefore based on the object of creating a tobacco portion envelope of the kind men-tioned last, which has a fibrous appearance similar to that of the actual tobacco filling and which con-sists of pure tobacco, thus not leading to any adul-teration of the flavor when the so produced cigarette will be smoked. Moreover, the envelope should be appro-priate for processing on a conventional cigarette pro-duction machine.
This problem is solved, in an unforeseen way, by the fact that the envelope is made of a non-woven fabric predominantly consisting of tobacco plant fibers.
The essence of the present invention thus resides in the fact that the envelope for the tobacco portion con-sists of tobacco as well, while to this end the natural structure of the tobacco is first broken down into fi-bers whereupon the separated fibers are re-combined ~ _ 4 - 133~817 into a leaf-like non-woven tobacco fabric.
The fibers of the non-woven fabric are preferably fibers from the stem of a tobacco plant and/or the rihs of t~cco leaves, i.e. tohacco parts which are normally waste.
The thickness of the envelope acGording to the present invention roughly corresFonds to that of a conventiQnal cigarette paper. Such a non-woven fahric materi~ e~sy to process on a oonventional cigarette produçtion maçhine, s~ecifically with production of the aforementioned tobac portions.
5ince accnrding to the present invention ~uth the envelope and the filling of the to~acco portion consist of to~acco a change of flavor due to the wrapping materiaJ may he excluded.
Moreover, the fibrous envelope material cQmes close tQ the tobacco filling in terms of optical appearance so that the consumer also gets the vi~ual impression of smoking only or pllre tobacoo. The envelope according to the present invention thus involves a marked increase of the opticaJ
acceptance of the tQbaccQ portion.
The aforementioned advantages are retained almust without any changes when up to 20 to 30 % approximately of flax, hemp or similar cellulose fibers are added to the non-woven enve]npe fahric.
- s - 1334817 The non-woven envelope fabric contains preferably also conventional tobacco ingredients such as whitening or incendiary agents as well as flavoring substances so that the tobacco filling and the non-woven envelope fabric undergo practically the same processing and are thus a homogenous intermediate tobacco product.
The envelope of the inventive design may preferably be provided also with a coating which has a thermoplas-tic effect in the area of major temperature, in parti-cular in the area of the incandescent zone, so that some kind of adhesive bond will be created between the envelope and the cigarette paper wrapping the latter tightly.
This fact and an appropriate selection of the ingre-dients are intended to achieve above all an automatic radial expansion or "palming" at least in the area of the progressing incandescent zone so that the required close fitting of the tobacco against the cigarette pa-per tube will always be ensured without any subsequent user's manipulation of the tobacco portion and/or the envelope, as is the case, for instance, in the European Patent EP-A 178 605. The user's subsequent mechanical influence on the tobacco product is thus no longer re-quired.
The selection of appropriate bonding agents for the non-woven envelope fabric will also permit a fabric structure so porous that an additional perforation may be eliminated, which would be required to make the to-bacco portion as such unsuitable for smoking.
- 6 - ~334817 The fibers of the non-woven envelope fabric may be ori-ented or non-oriented. A random-laid non-woven fabric entails the advantage that it resembles even better the tobacco filling proper and moreover ensures an en-hanced bonding inside the cigarette paper tube. The latter advantage is relevant mainly when the outside diameter os the rod-shaped tobacco portion is notice-ably smaller than the inside diameter of a finished cigarette paper tube, due to major tolerance allowan-ces. At the same time, such an embodiment will ensure a sufficient tightness between the envelope and the wrapping surface of the tobacco portion, on the one hand, and the cigarette paper tube on the other, so that the industrially manufactured cigarette can be smoked without any outside burn-up of the cigarette paper. With a high degree of "random orientation" the envelope may even give a down-right "skinny" or "furry"
surface structure to the tobacco portion.
The following is a more detailed description of an em-bodiment of the present invention, with reference to the enclosed drawing wherein:
Fig. 1 is an exploded perspective view of a system for the user's own cigarette production, using a tobacco portion with an envelope according to the present invention;
Fig. 2 is an enlarged sectional view, taken through a tobacco portion according to Fig. 1 and Fig. 3 is a perspective illustration of the production of a cigarette by means of sheets of cigarette papers, using a tobacco portion wrapped up in an envelope according to the present invention.
Fig. 1 illustrates an industrially prefabricated and dimensionally stable tobacco portion 10 beside a ciga-rette paper tube 11 with filter tip 12, as well prefa-bricated industrially, of the type usually employed by those who fill their cigarettes themselves. The di-mensionally stable tobacco portion 10 cannot be smoked outside the cigarette paper tube 11 even though it con-sists completely of smokable material. In more concrete terms, as can be taken specifically from Fig. 2, the tobacco portion 10 consists o~ a strand envelope or wrapping 13 of thin non-woven fabric. The surface of the envelope 13 or the outside surface of the tobacco is of an accordingly fibrous structure which is roughly indicated by reference numeral 20 in Figs.
1 and 2. The envelope 13 is provided with perforations 14 so as to render the tobacco portion 10 unsmokable as such over its entire length. The perforations 14 extend over the entire length of the tobacco portion 10, which is illustrated in Fig. 1. The perforations 14 are preferably arranged in an approximately uniform distribution over the ~length and the periphery of the tobacco portion 10. The non-woven envelope fabric may also be made so porous so separate perforations may be eliminated. The envelope 13 contains a strand-like tobacco filling 15 which is introduced by the manufac-turer. The tobacco filling 15 in the envelope 13 is filled to approximately the tight packing of an indus-trially manufactured cigarete, preferably with a slightly tighter density in the radial extension. The length of the tobacco portion 10 corresponds approxi-mately to the length of the tobacco-receiving volume 16 of a commercially available cigarette paper tube 11. The outside diameter of the tobacco portion 10 is slightly smaller than the inside diameter of the ciga-rette paper tube 11 so that it is unproblematic so in-troduce or push it into the cigarette paper tube 11.
The diameter of the tobacco portion 10 is preferably so dimensioned that the tobacco portion 10 can be in-troduced even into a cigarette paper tube which is un-dersized in terms of diameter, while leaving a clear-ance so that problems will not arise. The commercially available cigarette paper tubes are produced to dia-meter tolerances in the range from + 1/10 to 2/10 mm;
accordingly, the diameter of the tobacco portion 10 is so dimensioned that it is unproblematic to introduce it into a cigarette paper tube without any additional auxiliary means even when the diameter of the cigarette paper tube presents the maximum negative tolerance.
Independently of this fact, the tobacco filling 15 of each tobacco portion 10 corresponds, in terms of quan-tity, to the tight packing of the cigarette paper tube 11, which is desirable for the finished cigarette, and moreover to a normal industrially manufacctured ciga-rette, as has been stated above. The cross-section of the tobacco portion 10 is preferably approximately cir-cular all over the length so as to conform to the open cross-sectional area of the cigarette paper tube 11.
In order to ensure always a close fitting of the tobac-co portion 10 or the tobacco filling 15 against the inside of the cigarette paper tube 11 provisions may be preferably made with the aforedescribed tobacco por-tion so as to allow for automatic radial expansion of its diameter in use, and accordingly while remaining closely fitted against the cigarette paper; such expan-sion should be possible at least in the area of the incandescent zone and should progress together with this zone when the thus produced cigarette is smoked up. This measure is enhanced by the envelope material being some kind o non-woven fabric. When the non-woven envelope fabric 13 is treated in the same way as the tobacco filling, using conventional whitening and in-cendiary agents, the envelope will not hinder the palm-ing of the tobacco in the area of the incandescent zone, with the result that at least in the area of the incandescent zone a close fitting of the tobacco against the cigarette paper will always be ensured.
In this way, a proper burn-up of the finished cigarette is guaranteed all over its smoking length.
When the fibers of the envelope 13 are arranged in the form of a so-called non-oriented web a type of furry or skinny surface will be achieved. On the one hand, this surface structure will not obstruct the introduc-tion of the tobacco portion 10 into a prefabricated cigarette paper tube 11, while on the other hand it retains the tobacco portion 10 safely against the ciga-rette paper tube 11 inside the tobacco-receiving volume 16. The furry surface structure thus provides for a sufficiently complete filling of gaps which may be pre-sent between the tobacco portion 10 and the cigarette paper tube 11, thus contributing to unproblematic smo-king of the self-made cigarette without irregular burn-up of the cigarette paper tube. The air flow through the entire cross-sectional area of the cigarette paper tube 11 is approximately uniform. At the same time, a safe stay of the tobacco portion 10 within the ciga-rette paper tube 11 will be ensured even with a maximum positive tolerance of the cigarette paper tube diame-ter. The latter effect can be achieved specifically lo- 1334817 when the fibers project from the surface of the enve-lope 13 by a length of some 0.1 to some 0.3 mm. In this way, no problems will arise when the aforementioned plus/minus tolerances are to be balanced which are pre-sent in the diameter of conventional cigarette paper tubes 11.
The tobacco portion wrapped up according to the present invention is suitable also for use with cigarette pa-per, specifically sheets of cigarette paper 17 which are usually used by those who roll their cigarettes themselves. This application is illustrated in Fig. 3 wherein similar or analogous parts are identified by the same reference numerals as those used in Figs.
1 and 2. A conventional sheet of cigarette paper 17 is wrapped around the tobacco portion 10 with its enve-lope according to the present invention, whereupon it is bonded in the usual manner. The embodiment shown in Fig. 3 moreover features the peculiarity that at the front end (the left end in Fig. 3) of the rodshaped tobacco portion 10 a conventional filter tip 12 is at-tached in a way that the tobacco portion 10 and the filter tip 12 constitute an integral intermediate pro-duct which as a whole is then wrapped up in the sheet 17 of cigarette paper.
The fibrous outside surface of the tobacco portion 10 enhances the wrapping of the sheet of cigarette paper 17 since the latter cannot easily slip off the surface of the tobacco portion 10 when being wrapped around.
In this respect, the tobacco portion 10 is easy to wrap up in a way similar to the ease of wrapping up a strand of loose tobacco in the conventional method of ciga-r 4 ll- 133~817 rette self-rolling.
All the features disclosed in the application documents are claimed to be essential of the present invention to the extent by which they are novel, either taken alone or in combinations, and distinguishable from prior art.
Compared to these conventional methods, the method ac-cording to the applicant's European Patent EP-A 155 514 entails a distinct advance, which is characterized by a tobacco product comprising a dimensionally stable tobacco portion matched with the tobacco filling of a finished cigarette, whose envelope is formed by a wrapping of completely smokable material and is per-meable to air to an extent that the tobacco portion as such is not suited for smoking and becomes smokable only after its envelope has been tightly wrapped with cigarette paper or the like. A tobacco product of simi-lar design is suggested by the European Patent EP-A
178 605 whereof a preferred embodiment has a tobacco portion diameter which is slightly smaller than the inside diameter of the cigarette paper tube of the fi-nished cigarette so as to facilitate the introduction of the tobacco portion into the prefabricated cigarette paper tube. For this reason, the user is required sub-sequently to manipulate the diameter of the tobacco portion mechanically so as to achieve the close fitting of the tobacco portion against the cigarette paper, which is required for smoking.
The solutions mentioned last mainly propose the use of perforated cigarette paper or perforated tobacco wrapper for the envelope of the tobacco portion, the _ 3 _ 1 33~ 81 7 latter wrapping material being a paper support material onto which tobacco dust is bonded so as to create a continuous tobacco dust layer. Both wrapping materials, however, are characterized by paper which is unneces-sary for smoking and, in the case of the tobacco wrap-per, by an additional unnecessary bonding agent for the tobacco dust, which both lead evidently to an adul-terated flavor. Moreover, such wrappers are not ideal in terms of appearance and tight fitting of the tobacco portion inside the cigarette paper tube. In particular, the smoker cannot avoid smoking more paper and possibly even more of the bonding agent than this would normally be the case.
The present invention is therefore based on the object of creating a tobacco portion envelope of the kind men-tioned last, which has a fibrous appearance similar to that of the actual tobacco filling and which con-sists of pure tobacco, thus not leading to any adul-teration of the flavor when the so produced cigarette will be smoked. Moreover, the envelope should be appro-priate for processing on a conventional cigarette pro-duction machine.
This problem is solved, in an unforeseen way, by the fact that the envelope is made of a non-woven fabric predominantly consisting of tobacco plant fibers.
The essence of the present invention thus resides in the fact that the envelope for the tobacco portion con-sists of tobacco as well, while to this end the natural structure of the tobacco is first broken down into fi-bers whereupon the separated fibers are re-combined ~ _ 4 - 133~817 into a leaf-like non-woven tobacco fabric.
The fibers of the non-woven fabric are preferably fibers from the stem of a tobacco plant and/or the rihs of t~cco leaves, i.e. tohacco parts which are normally waste.
The thickness of the envelope acGording to the present invention roughly corresFonds to that of a conventiQnal cigarette paper. Such a non-woven fahric materi~ e~sy to process on a oonventional cigarette produçtion maçhine, s~ecifically with production of the aforementioned tobac portions.
5ince accnrding to the present invention ~uth the envelope and the filling of the to~acco portion consist of to~acco a change of flavor due to the wrapping materiaJ may he excluded.
Moreover, the fibrous envelope material cQmes close tQ the tobacco filling in terms of optical appearance so that the consumer also gets the vi~ual impression of smoking only or pllre tobacoo. The envelope according to the present invention thus involves a marked increase of the opticaJ
acceptance of the tQbaccQ portion.
The aforementioned advantages are retained almust without any changes when up to 20 to 30 % approximately of flax, hemp or similar cellulose fibers are added to the non-woven enve]npe fahric.
- s - 1334817 The non-woven envelope fabric contains preferably also conventional tobacco ingredients such as whitening or incendiary agents as well as flavoring substances so that the tobacco filling and the non-woven envelope fabric undergo practically the same processing and are thus a homogenous intermediate tobacco product.
The envelope of the inventive design may preferably be provided also with a coating which has a thermoplas-tic effect in the area of major temperature, in parti-cular in the area of the incandescent zone, so that some kind of adhesive bond will be created between the envelope and the cigarette paper wrapping the latter tightly.
This fact and an appropriate selection of the ingre-dients are intended to achieve above all an automatic radial expansion or "palming" at least in the area of the progressing incandescent zone so that the required close fitting of the tobacco against the cigarette pa-per tube will always be ensured without any subsequent user's manipulation of the tobacco portion and/or the envelope, as is the case, for instance, in the European Patent EP-A 178 605. The user's subsequent mechanical influence on the tobacco product is thus no longer re-quired.
The selection of appropriate bonding agents for the non-woven envelope fabric will also permit a fabric structure so porous that an additional perforation may be eliminated, which would be required to make the to-bacco portion as such unsuitable for smoking.
- 6 - ~334817 The fibers of the non-woven envelope fabric may be ori-ented or non-oriented. A random-laid non-woven fabric entails the advantage that it resembles even better the tobacco filling proper and moreover ensures an en-hanced bonding inside the cigarette paper tube. The latter advantage is relevant mainly when the outside diameter os the rod-shaped tobacco portion is notice-ably smaller than the inside diameter of a finished cigarette paper tube, due to major tolerance allowan-ces. At the same time, such an embodiment will ensure a sufficient tightness between the envelope and the wrapping surface of the tobacco portion, on the one hand, and the cigarette paper tube on the other, so that the industrially manufactured cigarette can be smoked without any outside burn-up of the cigarette paper. With a high degree of "random orientation" the envelope may even give a down-right "skinny" or "furry"
surface structure to the tobacco portion.
The following is a more detailed description of an em-bodiment of the present invention, with reference to the enclosed drawing wherein:
Fig. 1 is an exploded perspective view of a system for the user's own cigarette production, using a tobacco portion with an envelope according to the present invention;
Fig. 2 is an enlarged sectional view, taken through a tobacco portion according to Fig. 1 and Fig. 3 is a perspective illustration of the production of a cigarette by means of sheets of cigarette papers, using a tobacco portion wrapped up in an envelope according to the present invention.
Fig. 1 illustrates an industrially prefabricated and dimensionally stable tobacco portion 10 beside a ciga-rette paper tube 11 with filter tip 12, as well prefa-bricated industrially, of the type usually employed by those who fill their cigarettes themselves. The di-mensionally stable tobacco portion 10 cannot be smoked outside the cigarette paper tube 11 even though it con-sists completely of smokable material. In more concrete terms, as can be taken specifically from Fig. 2, the tobacco portion 10 consists o~ a strand envelope or wrapping 13 of thin non-woven fabric. The surface of the envelope 13 or the outside surface of the tobacco is of an accordingly fibrous structure which is roughly indicated by reference numeral 20 in Figs.
1 and 2. The envelope 13 is provided with perforations 14 so as to render the tobacco portion 10 unsmokable as such over its entire length. The perforations 14 extend over the entire length of the tobacco portion 10, which is illustrated in Fig. 1. The perforations 14 are preferably arranged in an approximately uniform distribution over the ~length and the periphery of the tobacco portion 10. The non-woven envelope fabric may also be made so porous so separate perforations may be eliminated. The envelope 13 contains a strand-like tobacco filling 15 which is introduced by the manufac-turer. The tobacco filling 15 in the envelope 13 is filled to approximately the tight packing of an indus-trially manufactured cigarete, preferably with a slightly tighter density in the radial extension. The length of the tobacco portion 10 corresponds approxi-mately to the length of the tobacco-receiving volume 16 of a commercially available cigarette paper tube 11. The outside diameter of the tobacco portion 10 is slightly smaller than the inside diameter of the ciga-rette paper tube 11 so that it is unproblematic so in-troduce or push it into the cigarette paper tube 11.
The diameter of the tobacco portion 10 is preferably so dimensioned that the tobacco portion 10 can be in-troduced even into a cigarette paper tube which is un-dersized in terms of diameter, while leaving a clear-ance so that problems will not arise. The commercially available cigarette paper tubes are produced to dia-meter tolerances in the range from + 1/10 to 2/10 mm;
accordingly, the diameter of the tobacco portion 10 is so dimensioned that it is unproblematic to introduce it into a cigarette paper tube without any additional auxiliary means even when the diameter of the cigarette paper tube presents the maximum negative tolerance.
Independently of this fact, the tobacco filling 15 of each tobacco portion 10 corresponds, in terms of quan-tity, to the tight packing of the cigarette paper tube 11, which is desirable for the finished cigarette, and moreover to a normal industrially manufacctured ciga-rette, as has been stated above. The cross-section of the tobacco portion 10 is preferably approximately cir-cular all over the length so as to conform to the open cross-sectional area of the cigarette paper tube 11.
In order to ensure always a close fitting of the tobac-co portion 10 or the tobacco filling 15 against the inside of the cigarette paper tube 11 provisions may be preferably made with the aforedescribed tobacco por-tion so as to allow for automatic radial expansion of its diameter in use, and accordingly while remaining closely fitted against the cigarette paper; such expan-sion should be possible at least in the area of the incandescent zone and should progress together with this zone when the thus produced cigarette is smoked up. This measure is enhanced by the envelope material being some kind o non-woven fabric. When the non-woven envelope fabric 13 is treated in the same way as the tobacco filling, using conventional whitening and in-cendiary agents, the envelope will not hinder the palm-ing of the tobacco in the area of the incandescent zone, with the result that at least in the area of the incandescent zone a close fitting of the tobacco against the cigarette paper will always be ensured.
In this way, a proper burn-up of the finished cigarette is guaranteed all over its smoking length.
When the fibers of the envelope 13 are arranged in the form of a so-called non-oriented web a type of furry or skinny surface will be achieved. On the one hand, this surface structure will not obstruct the introduc-tion of the tobacco portion 10 into a prefabricated cigarette paper tube 11, while on the other hand it retains the tobacco portion 10 safely against the ciga-rette paper tube 11 inside the tobacco-receiving volume 16. The furry surface structure thus provides for a sufficiently complete filling of gaps which may be pre-sent between the tobacco portion 10 and the cigarette paper tube 11, thus contributing to unproblematic smo-king of the self-made cigarette without irregular burn-up of the cigarette paper tube. The air flow through the entire cross-sectional area of the cigarette paper tube 11 is approximately uniform. At the same time, a safe stay of the tobacco portion 10 within the ciga-rette paper tube 11 will be ensured even with a maximum positive tolerance of the cigarette paper tube diame-ter. The latter effect can be achieved specifically lo- 1334817 when the fibers project from the surface of the enve-lope 13 by a length of some 0.1 to some 0.3 mm. In this way, no problems will arise when the aforementioned plus/minus tolerances are to be balanced which are pre-sent in the diameter of conventional cigarette paper tubes 11.
The tobacco portion wrapped up according to the present invention is suitable also for use with cigarette pa-per, specifically sheets of cigarette paper 17 which are usually used by those who roll their cigarettes themselves. This application is illustrated in Fig. 3 wherein similar or analogous parts are identified by the same reference numerals as those used in Figs.
1 and 2. A conventional sheet of cigarette paper 17 is wrapped around the tobacco portion 10 with its enve-lope according to the present invention, whereupon it is bonded in the usual manner. The embodiment shown in Fig. 3 moreover features the peculiarity that at the front end (the left end in Fig. 3) of the rodshaped tobacco portion 10 a conventional filter tip 12 is at-tached in a way that the tobacco portion 10 and the filter tip 12 constitute an integral intermediate pro-duct which as a whole is then wrapped up in the sheet 17 of cigarette paper.
The fibrous outside surface of the tobacco portion 10 enhances the wrapping of the sheet of cigarette paper 17 since the latter cannot easily slip off the surface of the tobacco portion 10 when being wrapped around.
In this respect, the tobacco portion 10 is easy to wrap up in a way similar to the ease of wrapping up a strand of loose tobacco in the conventional method of ciga-r 4 ll- 133~817 rette self-rolling.
All the features disclosed in the application documents are claimed to be essential of the present invention to the extent by which they are novel, either taken alone or in combinations, and distinguishable from prior art.
Claims (12)
1. Envelope for a dimensionally stable tobacco portion matched with the tobacco-receiving volume of a cigarette, in particular a filter tip cigarette, said envelope consisting of a completely smokable material and being permeable to air to an extent that said tobacco portion as such is unsmokable and becomes smokable only after being tightly wrapped into cigarette paper or the like, characterized in that said envelope is made of a non-woven fabric predominantly consisting of tobacco plant fibers.
2. Envelope according to Claim 1, characterized in that the fibers of said non-woven fabric are predominantly fibers from at least one of the stem of a tobacco plant and ribs of tobacco leaves.
3. Envelope according to Claim 1, characterised in that the fibers are digested by boiling with the addition of preferably 5 to 20% o caustic soda (NaOH) or an appropriate equivalent.
4. Envelope according to Claims 1, 2 or 3, characterized in that the fibers are processed by crushing and grinding, preferably down to a mean length of 0.1 to 2.5 mm.
5. Envelope according to Claims 1, 2 or 3, characterized in that it contains up to 20 to 30%
approximately of flax, hemp or similar cellulose fibers.
approximately of flax, hemp or similar cellulose fibers.
6. Envelope according to Claims 1, 2 or 3, characterized in that it contains conventional tobacco ingredients, in particular flavoring substances.
7. Envelope according to Claim 1, 2 or 3 characterized in that the envelope fibers are fibers of different unprocessed tobaccos.
8. Envelope according to Claims 1, 2 or 3, characterized by a basic weight of 10 to 80 g/m2 approximately, preferably in the range from 25 to 50 g/m2 approximately.
9. Envelope according to Claims 1, 2 or 3, characterized in that the fibers of said non-woven fabric are oriented or laid at random (random-laid non-woven fabric).
10. A dimensionally stable tobacco portion wrapped in an envelope, said envelope consisting of a completely smokable material and being permeable to air to an extent that said tobacco portion as such is unsmokable and becomes smokable only after being tightly wrapped into cigarette paper or the like, characterized in that said envelope is made of a non-woven fabric predominantly consisting of tobacco plant fibers.
11. A product according to Claim 10, characterized in that the fibers of said non-woven fabric are predominantly fibers from at least one of the stem of a tobacco plant and ribs of tobacco leaves.
12. A product according to Claim 10, characterised in that the fibers are digested by boiling with the addition of preferably 5 to 20% o caustic soda (NaOH) or an appropriate equivalent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3738491.0 | 1987-11-12 | ||
| DE19873738491 DE3738491A1 (en) | 1987-11-12 | 1987-11-12 | Wrapping for a dimensionally stable tobacco portion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1334817C true CA1334817C (en) | 1995-03-21 |
Family
ID=6340377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 582071 Expired - Fee Related CA1334817C (en) | 1987-11-12 | 1988-11-03 | Envelope for a dimensionally stable tobacco portion |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1334817C (en) |
| DE (1) | DE3738491A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5165426A (en) * | 1989-08-18 | 1992-11-24 | British-American Tobacco Company Limited | Processing of tobacco leaves |
| DE19957486C2 (en) * | 1999-11-23 | 2003-06-18 | Reemtsma H F & Ph | Flavored smokable items |
| WO2001048318A1 (en) * | 1999-12-27 | 2001-07-05 | Japan Tobacco Inc. | Wrapping paper for cigarette reduced in scattering property of ash therefrom |
| CN105167187B (en) * | 2015-07-28 | 2019-10-11 | 湖北中烟工业有限责任公司 | Ramee cigarette filter and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL198064A (en) * | 1954-06-16 | |||
| US3145717A (en) * | 1959-10-22 | 1964-08-25 | C H Dexter & Sons Inc | Methods of making tobacco web material |
| DE3407461C1 (en) * | 1984-02-29 | 1985-10-24 | Efka-Werke Fritz Kiehn Gmbh, 7218 Trossingen | Tobacco product for the do-it-yourself manufacture of a cigarette or filter cigarette |
-
1987
- 1987-11-12 DE DE19873738491 patent/DE3738491A1/en not_active Ceased
-
1988
- 1988-11-03 CA CA 582071 patent/CA1334817C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE3738491A1 (en) | 1989-05-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |