Filter stick for cigarette

Abstract

The utility model relates to a cigarette filter stick which comprises at least two filter stick units (1) and at least one slitting unit (2), the slitting unit (2) is arranged between two adjacent filter stick units (1), each filter stick unit (1) comprises a first filter section (11) and a second filter section (12), and the first filter section (11) and the second filter section (12) are different in internal structure or material. The second filtering sections (12) of every two adjacent filter stick units (1) are connected to the two ends of the slitting unit (2) respectively, and the sections of the second filtering sections (12) of every two adjacent filter stick units (1) are in mirror symmetry. By arranging the slitting unit, the problem of wrong slitting caused by length deviation of the filter stick unit can be effectively avoided, and the integrity of the filter stick unit obtained after slitting is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of cigarette filter rod technology, and in particular to a cigarette filter rod. Background Technology

[0002] The filter tip is the part of a cigarette that filters smoke and blocks ash. It is usually 18-35mm long.

[0003] A multi-element filter means that a filter is divided into several parts, hence the name multi-element filter. The most common type is the single-element filter, which consists of a single filtration section. There are also two-element, three-element, and four-element filters. Generally, two adjacent sections (elements) in a filter are of different types.

[0004] Filter rods are one of the auxiliary materials in the cigarette-making process. After being cut by a cigarette-making machine and combined with tobacco segments, they become cigarettes with filter tips. Filter tips are referred to as "multi-component filter tips," and their corresponding filter rods are also called multi-component filter rods. However, this does not mean that a filter rod is composed of only a few parts. For example, when we say a binary filter rod, we mean that the cigarette filter made from this filter rod consists of two segments; in reality, a binary filter tip is composed of five segments.

[0005] The forming paper is the material used to wrap the filter section on the filter rod, forming it into a cylindrical shape.

[0006] Filter rods with two or more elements are called multi-element filter rods, which are composed of various filter rod segments. The manufacturing process for these filter rods involves first producing different types of filter rod segments (basic filter rods, or base rods) using corresponding forming machines according to the various filter rod types they contain—this is the first forming process. Then, a filter rod composite machine combines these different filter rod segments in a specific order to form a composite filter rod—this is the second composite process. As the number of elements and complexity of the multi-element filter rod increases, it can be progressively composited, meaning it can be composited multiple times. Each process involves wrapping the contents with forming paper, but the process for the contents differs. The first layer contains filter media, while the subsequent layers contain base rods.

[0007] The hollow filter rods currently used in the cigarette industry are a special type of cigarette filter rod. They form a hollow structure near the lip end of the cigarette, enhancing brand recognition. In some applications, the hollow internal shape is also designed into simple pattern outlines to further improve brand recognition. Simultaneously, when the consumer inhales the cigarette, it has a certain shaping effect on the smoke flow, regulating the state of the smoke in the mouth.

[0008] Before being fed into cigarette manufacturing machinery, hollow cigarette filters exist as filter rods, which are one of the auxiliary materials for filtering cigarettes. Typically, the length of a filter rod is four or six times that of the cigarette filter tip, and it is cut and combined with tobacco segments on the cigarette rolling machine.

[0009] For example, the composite structure of a filter rod with an empty tube section and its application in a cigarette making machine is as follows:

[0010] like Figure 1 As shown, ABR represents the solid section (white) of the cellulose acetate filter tip, and SBR represents the hollow section (gray) of the cellulose acetate filter tip. The parts with the same color are the same structural sections. The dotted lines in the figure represent their cutting positions in the cigarette rolling process, and they do not actually play a role in the filter rod.

[0011] A typical composite filter rod is 120mm long and divided into five sections, symmetrical about the central axis, with the left and right halves also symmetrical about their own central axis. The 120mm filter rod contains four filter segments, each 30mm long, and each filter segment consists of a 23mm solid segment and a 7mm hollow segment.

[0012] like Figure 2 As shown, the process of cutting and combining the filter rod with the cigarette is as follows: First, cut it from the middle to divide it into two independent sections. Take one section and combine it with the cigarette body sections at both ends. Then, cut it a second time in the middle to obtain two cigarettes.

[0013] However, if the shape of the air tube filter rod is asymmetrical (including axisymmetric and centrosymmetric), this process will cause problems.

[0014] For example, such as Figure 3 As shown, assuming the internal shape of the empty tube filter rod is "L", after the second cutting, the empty tube is cut into two sections. Then one section is turned 180 degrees, and the resulting pattern will be a mirrored "L".

[0015] This situation is unavoidable for empty tube filter rods that require the application of asymmetrical patterns, where half of the smoke is a regular "L" shape and the other half is a reversed "L" shape. This makes it impossible to apply asymmetrical patterns to empty tube filter rods under current technological conditions.

[0016] To address the asymmetry problem, related technologies treat the shape segment in the filter rod as two segments. For example... Figure 4 As shown, in the finished filter rod, the shape segment consists of two parts, one facing forward and the other backward, which forms a completely positive shape in the cigarette-making process. However, this process is not very feasible.

[0017] Because the filter rod itself, its internal segments, and the length of the cigarette segment will always have length errors during manufacturing, it is almost impossible to maintain the standard value forever. For example, the industry standard for filter rod segment length error is ±1mm, and the total length error is ±0.5mm. Once there are length errors in the internal segments of the filter rod, it will be impossible to cut precisely at the seam of the two opposing shaped segments during the second cutting of the cigarette machine. This will result in the cigarette end shape still being unrecognizable, and the very thin filter rod segments cut out may fall out when the consumer smokes, posing an inhalation risk.

[0018] It should be noted that the information disclosed in the background section of this utility model is intended only to enhance the understanding of the overall background of this utility model, and should not be construed as an admission or implication in any way that such information constitutes prior art known to those skilled in the art. The above statements are only used to provide background information related to this utility model, and do not necessarily constitute prior art. Utility Model Content

[0019] This utility model provides a cigarette filter rod that can effectively improve the convenience of cutting.

[0020] According to one aspect of the present invention, a cigarette filter rod is provided, comprising at least two filter rod units and at least one cutting unit. The cutting unit is disposed between two adjacent filter rod units. Each filter rod unit includes a first filter section and a second filter section. The first filter section and the second filter section have different internal structures or materials. The second filter sections of two adjacent filter rod units are respectively connected to the two ends of the cutting unit. The cross sections of the second filter sections of two adjacent filter rod units are mirror symmetrical.

[0021] In some embodiments, the slitting unit has an internal cavity.

[0022] In some embodiments, the cavity extends from one end of the slitting unit to the other end.

[0023] In some embodiments, the cavity is cylindrical in shape.

[0024] In some embodiments, the cigarette filter rod also includes forming paper, and the slitting unit is made of forming paper.

[0025] In some embodiments, the basis weight of the formed paper is 78 g / m². 2 ~130g / m 2 .

[0026] In some embodiments, the outer surface color of the filter rod unit is different from the outer surface color of the slitting unit.

[0027] In some embodiments, the length of the slitting unit is 4mm to 10mm.

[0028] In some embodiments, the cross-section of the first filter segment includes text or asymmetrical graphics; and / or, the cross-section of the second filter segment includes text or asymmetrical graphics.

[0029] In some embodiments, the cigarette filter rod includes four filter rod units, with the first filter sections of the two middle filter rod units connected together, and the second filter sections of the two end filter rod units respectively connected to the second filter sections of their adjacent filter rod units via a cutting unit.

[0030] Based on the above technical solution, this utility model, by setting a cutting unit, can achieve the cutting purpose by cutting the two filter rod units, thereby improving the convenience of cutting and avoiding the inability to cut exactly at the joint of the two filter rod units 1 due to cutting errors, manufacturing errors, etc. It can ensure the uniformity and integrity of the cross-sectional shape of the cut filter rod unit, without any positive or negative sides, and will not form very thin filter rod segments that fall out when consumers smoke, effectively reducing the risk of inhalation and improving safety. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0032] Figure 1 This is a schematic diagram of the structure of a filter rod in a related technology.

[0033] Figure 2 This is a schematic diagram of the cutting of a filter rod in related technologies.

[0034] Figure 3 This is a schematic diagram of the cutting of another type of filter rod in the related technology.

[0035] Figure 4 This is a schematic diagram of the cutting of another type of filter rod in related technologies.

[0036] Figure 5 Schematic diagrams of some embodiments of the cigarette filter rod provided by this utility model.

[0037] In the picture:

[0038] 1. Filter rod unit; 11. First filter section; 12. Second filter section; 2. Slitting unit. Detailed Implementation

[0039] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0040] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0041] like Figure 5 As shown, in an embodiment of the cigarette filter rod provided by this utility model, the cigarette filter rod includes at least two filter rod units 1 and at least one cutting unit 2. The cutting unit 2 is disposed between two adjacent filter rod units 1. The filter rod unit 1 includes a first filter section 11 and a second filter section 12. The internal structure or material of the first filter section 11 and the second filter section 12 are different. The second filter sections 12 of two adjacent filter rod units 1 are respectively connected to the two ends of the cutting unit 2. The cross sections of the second filter sections 12 of two adjacent filter rod units 1 are mirror symmetrical.

[0042] By setting the cutting unit 2, the cutting of two filter rod units 1 can be achieved by cutting the cutting unit 2, which improves the convenience of cutting and avoids the problem of not being able to cut exactly at the joint of the two filter rod units 1 due to cutting errors, manufacturing errors, etc. It also avoids the problem of incorrect cutting caused by the length deviation of the filter rod units 1. It can ensure the uniformity and integrity of the cross-sectional shape of the cut filter rod units, without any positive or negative sides, and will not form very thin filter rod segments that fall out when consumers smoke, effectively reducing the risk of inhalation and improving safety.

[0043] This embodiment of the invention pre-sets the second filter sections 12 of the two filter rod units 1 to be mirror-symmetrical, so that the two cut second filter sections 12 can correctly display the set asymmetrical pattern. This allows the cigarettes connected to the two filter rod units 1 to be finally made into cigarettes that meet the requirements, with consistent appearance and no defects of mirror bodies. This not only reduces filter rod waste, but is especially suitable for the production of cigarettes with asymmetrical patterns such as Chinese characters.

[0044] In some embodiments, the cutting unit 2 has an internal cavity.

[0045] Setting a cavity inside the slitting unit 2 can effectively reduce the structural complexity of the slitting unit 2, thereby reducing the cost of the slitting unit 2 and facilitating its widespread use.

[0046] In some embodiments, the cavity may also be filled with filler material for support and ease of cutting.

[0047] In some embodiments, the cavity extends from one end of the slitting unit 2 to the other end.

[0048] The cavity extends along the axial direction of the cutting unit 2, which makes the cutting unit 2 a cavity structure as a whole, effectively ensuring the consistency, uniformity and simple structure of the cutting unit 2, and facilitating cutting.

[0049] In some embodiments, the cavity is cylindrical. The cylindrical cavity is consistent with the cylindrical shape of the filter rod unit 1, which can reduce the complexity of the cavity and reduce the manufacturing difficulty of the slitting unit 2.

[0050] In other embodiments, the cavity may also be in the shape of a triangular prism or a quadrangular prism.

[0051] In some embodiments, the cigarette filter rod also includes forming paper, and the slitting unit 2 is made of forming paper.

[0052] The slitting unit 2 is made of forming paper. The forming paper on the outer periphery of the filter rod unit 1 can be used to make the slitting unit 2. There is no need to configure special manufacturing materials for the slitting unit 2, which can greatly reduce the manufacturing difficulty and manufacturing cost of the slitting unit 2.

[0053] In some embodiments, the basis weight of the formed paper is greater than 78 g / m². 2 .

[0054] Use a weight greater than 78g / m 2 The forming paper helps maintain the shape of the slitting unit 2 and avoids collapse and deformation.

[0055] In some embodiments, the basis weight of the formed paper is 100 g / m². 2 ~130g / m 2 .

[0056] Using a weight of 100g / m 2 ~130g / m 2 The forming paper can effectively enhance the overall strength of the slitting unit 2 and prevent collapse and deformation.

[0057] In some embodiments, the outer surface color of the filter rod unit 1 is different from the outer surface color of the slitting unit 2. This makes it easier to distinguish between the filter rod unit 1 and the slitting unit 2, improving the convenience of slitting.

[0058] In some embodiments, the length of the slitting unit 2 is 4 mm to 10 mm.

[0059] Setting the length of the slitting unit 2 to 4 mm to 10 mm can avoid waste caused by the slitting unit 2 being too long and can also avoid increasing the difficulty of finding the cutting seam due to the slitting unit 2 being too short.

[0060] In some embodiments, the cross-section of the first filtering section 11 includes characters or asymmetric graphics; and / or, the cross-section of the second filtering section 12 includes characters or asymmetric graphics.

[0061] In some embodiments, the cross-sections of the first filtering section 11 and the second filtering section 12 can also be graphics with angles or side lengths not all the same.

[0062] Furthermore, the asymmetric patterns presented by the cross-sections of the first filtering section 11 and the second filtering section 12 can be formed by characters, asymmetric graphics (graphics with angles or side lengths not all the same), and can be any one of single characters, character combinations, single graphics, graphic combinations, or combinations of characters and graphics. The characters can be any one or more of Chinese characters, English letters, Latin letter or phrases, Slavic letters or phrases, Arabic letters or phrases; the graphics can be any one or more of flower shapes, polygons, multi-angle stars, or curved shapes, and the graphics can be a combination of multiple graphics, such as forming currency symbols, emoji, etc.

[0063] For the cigarette filter rod provided by the present utility model, the characters formed by the cross-sections of the first filtering section 11 and the second filtering section 12 are preferably Chinese characters in calligraphy fonts, such as asymmetric Chinese characters like "he", "bai", "tian", "xia", etc. They have a novel appearance, are pleasing to the eye, endow certain humanistic concepts, are easy to distinguish, and can play a good anti-counterfeiting role, protecting the interests of both enterprises and consumers from being infringed. Some parts of the characters or graphics can be symmetric, but the overall combination is asymmetric.

[0064] According to the actual situation, the number of filter rod units 1 can be flexibly set as needed.

[0065] In some embodiments, the cigarette filter rod includes four filter rod units 1. The first filtering sections 11 of the two filter rod units 1 in the middle are connected, and the second filtering sections 12 of the two filter rod units 1 at both ends are respectively connected to the second filtering sections 12 of the adjacent filter rod units 1 through the slitting unit 2.

[0066] As Figure 5 shown, first cut it in the middle into two parts, each part containing two sections of the first filtering section 11, two sections of the second filtering section 12, and the slitting unit 2 in the middle. Each part can be slit at the slitting unit 2 to obtain two independent filter rod units 1.

[0067] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0068] Those skilled in the art will understand that, in the methods described in the specific embodiments, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the principle of this utility model, and such modifications and equivalent substitutions should all be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A cigarette filter rod, characterized in that, It includes at least two filter rod units (1) and at least one cutting unit (2). The cutting unit (2) is disposed between two adjacent filter rod units (1). The filter rod unit (1) includes a first filter section (11) and a second filter section (12). The internal structure or material of the first filter section (11) and the second filter section (12) are different. The second filter sections (12) of two adjacent filter rod units (1) are respectively connected to the two ends of the cutting unit (2). The cross sections of the second filter sections (12) of two adjacent filter rod units (1) are mirror symmetrical.

2. The cigarette filter rod according to claim 1, characterized in that, The cutting unit (2) has a cavity inside.

3. The cigarette filter rod according to claim 2, characterized in that, The cavity extends from one end of the slitting unit (2) to the other end.

4. The cigarette filter rod according to claim 2, characterized in that, The cavity is cylindrical in shape.

5. The cigarette filter rod according to claim 1, characterized in that, It also includes forming paper, and the slitting unit (2) is made of the forming paper.

6. The cigarette filter rod according to claim 5, characterized in that, The basis weight of the formed paper is 78 g / m². 2 ~130g / m 2 .

7. The cigarette filter rod according to claim 1, characterized in that, The outer surface color of the filter rod unit (1) is different from the outer surface color of the slitting unit (2).

8. The cigarette filter rod according to claim 1, characterized in that, The length of the slitting unit (2) is 4mm to 10mm.

9. The cigarette filter rod according to claim 1, characterized in that, The cross-section of the first filter segment (11) includes text or asymmetrical graphics; and / or, the cross-section of the second filter segment (12) includes text or asymmetrical graphics.

10. The cigarette filter rod according to claim 1, characterized in that, The cigarette filter rod includes four filter rod units (1), the first filter section (11) of the two filter rod units (1) located in the middle is connected, and the second filter section (12) of the two filter rod units (1) located at both ends is connected to the second filter section (12) of the filter rod unit (1) adjacent to it through the cutting unit (2).

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