Filter cigarette

Abstract

The proposed invention relates to filter cigarettes. The proposed filter cigarette comprises a rod-shaped tobacco portion, which is connected at one end to a filter. The cigarette has a total length of 100 to 125 mm. The filter comprises at least two segments. The ratio of the total length of the filter to the length of the tobacco portion is from 0.67 to 1.5. The free segment at the end of the filter is made in the form of a tube with rigid walls, which length is at least 8% of the total length of the filter. The technical effect of the claimed invention is to ensure hygienic and comfortable use of a filter cigarette, as well as to reduce harmful effects of smoking on the smoker's body.

Description

[0001] FILTER CIGARETTE

[0002] SPECIFICATION

[0003] Technical field

[0004] The invention relates to the production of cigarettes, in particular to filter cigarettes.

[0005] Prior art

[0006] In practice, there are widely known "classic" filter cigarettes basically representing a paper cylinder with crushed and pressed smoking tobacco contained inside, and a filter connected to one end thereof. In this case, regardless of the used filter material or the combination of such materials and the structure of the filter, the filter (absorbing) materials or combination thereof are wrapped in tipping paper and have a length of 15 to 22 mm.

[0007] Furthermore, there are known conventional cigarettes having a tobacco portion made in the form of a rod and connected at one end to a filter- mouthpiece with a total length of 25 to 35 mm, where the length of the mouthpiece is 5 to 7 mm [1].

[0008] The closest technical solution to the proposed filter cigarette is a thin cigarette comprising a tobacco portion in the form of a rod wrapped in cigarette paper and connected at one end to a filter. The filter comprises a filter element on the tobacco portion side and a filter element on the smoking portion side.

[0009] The cigarette has a diameter of 4 to 7 mm and releases about 1 mg of condensate or no more than 0.2 mg of nicotine with smoke. The filter is characterized in that the full length thereof is approximately 25 to 40 mm, while the filter element on the tobacco portion side is approximately 10 to 25 mm. According to another design option of the known cigarette, the filter has an additional filter element located between the two filter elements, comprising carbon and made approximately 5 to 15 mm long [2]. Regardless of some design features of the above- mentioned known cigarettes, as well as the degree of reduction of the amount of condensate or nicotine in the passing smoke, known cigarettes have certain drawbacks that cause discomfort associated with hygiene and ease of use for smokers. In particular, the relatively small size of the filter of known cigarettes does not provide for sufficient cooling of the smoke inhaled by the smoker, which is not conductive to reducing the condensate content, and therefore the nicotine content contained in the inhaled smoke. As a result, this also does not help to reduce the harmful effects of cigarette smoke on the smoker's body.

[0010] Moreover, when smoking cigarettes with a relatively short filter, the smoker's fingers holding the cigarette are close to the burning portion of the cigarette, come into contact with the cigarette smoke, becoming enveloped in the condensate contained therein, whereby they turn yellow and become saturated with a specific tobacco smell.

[0011] Summary of the invention

[0012] The objective and technical effect of the invention are to ensure hygienic and comfortable use of a filter cigarette, as well as to reduce harmful effects of a process of smoking and cigarette smoke on the smoker's body.

[0013] The solution to this problem and the technical effect are achieved by the fact that a filter cigarette, having a rod- shaped tobacco portion, which is connected at one end to the filter, has a total length of 100 to 125 mm, and the filter comprises at least two segments, while the ratio of the total length of the filter to the length of the tobacco portion is from 0.67 to 1.5, and the free segment at the end of the filter is made in the form of a tube with rigid walls, which length is at least 8% of the total length of the filter.

[0014] The above design of the filter cigarette provides hygienic and comfortable use of the filter cigarette and reduce harmful effects of smoking on the smoker's body for the following reasons: due to the long length of the cigarette from 100 to 125 mm, the increased length of the filter (the ratio of the total length of the filter to the length of the tobacco portion is 0.67-1.5) and the presence of a free end portion of the filter in the form of a tube with rigid walls with a length of at least 8% of the total length of the filter, the temperature of the smoke inhaled by the user is significantly reduced, which leads to a decrease in the amount of condensate transferred to the user (smoker) with cigarette smoke, and, consequently, to a decrease in the nicotine content, which in turn leads to a decrease in the harmful effects of smoking on the smoker's body.

[0015] In this application, rigid walls are understood to mean walls that are capable of retaining their shape for the most part, not deforming or softening when smoking in the usual way.

[0016] The free segment at the end of the filter and the segment adjacent to it can be made as a single element or separate elements. In the preferred embodiment, the wall thickness of the tube with rigid walls is at least 1.1 mm.

[0017] Due to the increased thickness of the rigid walls of the tube, the amount of nicotine inhaled by the user is additionally reduced, which, in turn, leads to an additional reduction in the harmful effects of smoking on the smoker's body.

[0018] In a more preferred embodiment, the rigid walls of the tube comprise acetate fiber.

[0019] Due to the fact that the rigid walls of the tube comprise acetate fiber, the amount of nicotine inhaled by the user is additionally reduced, which in turn leads to an additional reduction in the harmful effects of smoking on the smoker's body.

[0020] In an even more preferred embodiment, the rigid walls of the tube are covered with foil on the outside.

[0021] Due to the fact that the rigid walls of the tube are covered with foil on the outside, the likelihood of the fingers holding the cigarette being soaked with smoke condensate during smoking is reduced, significantly reducing the likelihood of the smoker's fingers turning yellow, which in turn leads to an additional reduction in the harmful effects of smoking on the smoker's body.

[0022] In an even more preferred embodiment, the filter comprises a monoacetate segment.

[0023] Due to the fact that the filter comprises a monoacetate segment, the amount of nicotine inhaled by the user is additionally reduced, which in turn leads to an additional reduction in the harmful effects of smoking on the smoker's body.

[0024] In an even more preferred embodiment, the filter comprises a monoacetate segment and an acetate segment comprising a sorbent.

[0025] Due to the fact that the filter comprises a monoacetate segment and an acetate segment comprising a sorbent, the amount of nicotine inhaled by the user is further reduced, which in turn leads to an additional reduction in the harmful effects of smoking on the smoker's body.

[0026] Brief description of the drawings

[0027] The drawings are presented for a better understanding of the technical solution; however, it will be obvious to a person skilled in the art that the disclosed technical solution is not limited to the options presented in them.

[0028] The invention is explained by drawings, where: Figure 1 shows a general view of a filter cigarette according to an embodiment, wherein the filter and the tobacco portion have the same length;

[0029] Figure 2 shows a longitudinal section of a filter cigarette, wherein the filter is made in the form of two separate segments;

[0030] Figure 3 shows a longitudinal section of a filter cigarette, wherein the filter is made in the form of three separate segments.

[0031] Embodiments of the invention

[0032] The described exemplary embodiments are provided solely for illustrative purposes. It will be obvious to a person skilled in the art that other embodiments are also possible without changing the essence of the invention.

[0033] A filter cigarette has a tobacco portion (1) in the form of a round rod (a rod with a round cross-section), wherein one end is attached to a filter (2) comprising at least two segments.

[0034] In this case, the free end of the filter (2) is made in the form of a tube (3) with rigid walls, which, together with the adjacent monoacetate segment (4) of the filter, can be made either as a single element (Fig. 1), or separately in the form of elements (3) and (4), or in the form of any combination of other additional elements (Figs. 2 and 3).

[0035] An acetate segment comprising, for example, activated carbon and / or any other sorbent, for example, perlite, can be used as an additional segment of the filter (2).

[0036] The length of the tube (3) is at least 8% of the total length of the filter, which, depending on the requirements for the manufactured product, can have different sizes.

[0037] According to the invention, the total length of a cigarette is from 100 to 125 mm.

[0038] In this case, the ratio of the total length of the filter (2) to the length of the tobacco portion (1) is from 0.67 to 1.5.

[0039] Such a ratio allows, based on the properties of the tobacco portion (1) and its dimensions, to provide wide possibilities for choosing the design of the filter (2), structural elements and dimensions thereof that will ensure a given nicotine content in the smoke inhaled by the smoker.

[0040] When implementing the proposed invention, the calculation of the total length of the filter (Lf) depending on the length of the cigarette (L) is performed according to the following formula:

[0041] K = Lf / (L-Lf), where k is 0.67 to 1.5. That is, Lf = (K x L):(l + K);

[0042] For L = 100 and K = 0.67, the total length of the filter will be 67: 1.67 = 40.11 mm, etc., which leads to the data below.

[0043] In this case, a cigarette with a total length L of 100 mm may have the following parameters: total length of the filter (2): about 40 to 60 mm, length of the tobacco portion (1): about 60 to 40 mm length of the tube with rigid walls (3): not less than 3.2 to 4.8 mm.

[0044] A cigarette with a total length L of 125 mm may have the following parameters: total length of the filter (2): about 50 to 75 mm, length of the tobacco portion (1): about 75 to 50 mm length of the tube with rigid walls (3): not less than 4 to 6 mm.

[0045] As follows from the provided data, the proposed cigarette with a length of 100 to 125 mm may have a filter length (2) of any value selected from the range of about 40 to 75 mm, in each case for a cigarette that meets specific requirements. In this case, the length of the tobacco portion is determined by the difference between the selected total length of the cigarette and the total length of the filter (2).

[0046] The length of the tube (3) can also be selected in a fairly wide range depending on the dimensions of the remaining segments (sections) installed in the filter (2), which can be made of various materials and have different dimensions.

[0047] The thickness W of the wall of the tube with rigid walls is at least 1.1 mm, and the rigid walls of the tube comprise acetate fiber.

[0048] The rigid walls of the tube are covered with foil on the outside.

[0049] The choice of the proposed ratio of the filter (2) and the tobacco portion (1) makes it possible, in the specified range of the total length of cigarettes, to select for each specific case a filter with such a design that will ensure the performance of the main function of the filter in accordance with the specific requirements for the cigarette being produced, while simultaneously ensuring the desired length of the tube.

[0050] Thus, the cigarette of the proposed design acquires a number of important features, in particular, with respect to hygienic requirements, and is characterized by the following features that make it very convenient in use:

[0051] 1. Due to the length of the cigarette filter, the temperature of the smoke inhaled by the user is significantly reduced, which leads to a decrease in the amount of condensate transferred to the user (smoker) with cigarette smoke, and, consequently, to a decrease in the nicotine content, which in turn leads to a decrease in the harmful effects of smoking on the smoker's body.

[0052] 2. To a certain extent, it ensures the removal of cigarette smoke from the smoker's eyes, reducing the effect of smoke on the smoker's vision,

[0053] 3. Allows to keep the fingers holding the cigarette as far as possible from the burning portion of the cigarette, reducing the likelihood of burning the fingers.

[0054] 4. Significantly reduces the likelihood of the fingers holding the cigarette becoming saturated with smoke condensate during smoking, thereby reducing the likelihood of the smoker's fingers turning yellow and becoming saturated with the smell of tobacco.

[0055] 5. In functional terms, it allows to keep the fingers at a sufficient distance from the burning portion of the cigarette when smoking with gloves, eliminating the risk of burning (burning through) the glove, as well as the residual effect of the smell of cigarettes on the glove.

[0056] 6. In hygienic terms, it ensures safe extinguishing of the cigarette, by keeping the fingers at a sufficient distance from the extinguishing surface, and further prevents contact of the fingers with the remains of the burnt cigarette and ash.

[0057] In addition to the foregoing, due to the proposed design, the filter cigarette acquires an elegant appearance, which is especially important for premium cigarettes, as well as for women's cigarettes.

[0058] References:

[0059] 1. http s : / / dzen.ru / a / Y 5 C9m_M sxH32gavQ; http s : / / dzen.ru / a / Y qzXoOZmzG2 vI0e6 ;

[0060] 2. Eurasian Patent: EA 9502 Bl, application: 200701647, filing date: 27.01.2006, patent holder: Philip Morris Products S.A. (CH), closest prior art.

Claims

8AMENDED CLAIMS received by the International Bureau on 21 November 2025 (21.11 .2025)1. A filter cigarette comprising a rod-shaped tobacco portion (1) connected at one end to a filter (2) and having a total length of 100 to 125 mm, wherein the filter (2) comprises at least two segments, a ratio of a total length of the filter (2) to a length of the tobacco portion (1) is from 0.67 to 1.5, and a free segment (3) at an end of the filter (2) is made in a form of a tube with rigid walls, which length is at least 8% of the total length of the filter (2), characterized in that the rigid walls of the tube are covered with foil from outside.

2. The filter cigarette according to claim 1, characterized in that the free segment (3) at the end of the filter (2) and the segment (4) adjacent to it are made in a form of a single element or separate elements.

3. The filter cigarette according to claim 1, characterized in that a wall thickness of the tube with rigid walls is at least 1.1 mm.

4. The filter cigarette according to claim 1, characterized in that the rigid walls of the tube comprise acetate fiber.

5. The filter cigarette according to claim 1, characterized in that the filter (2) comprises a monoacetate segment (4).

6. The filter cigarette according to claim 1, characterized in that the filter (2) comprises a monoacetate segment (4) and an acetate segment comprising a sorbent.

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