RU184342U1 - PRODUCT FOR USE IN THE DEVICE FOR HEATING SMOKING MATERIAL - Google Patents

Abstract

The smoking article is intended to be used in a device for heating smoking material to vaporize at least one component of this smoking material. The product comprises a body of smoking material and a filter assembly including a cooling section, a filtering section and a mouthpiece section adapted to be received by the user's mouth. The smoking article is designed so that when it is fully inserted into the device for heating, the first part of the cooling section is located in this device, and the second part of the cooling section is outside this device. The second part of the cooling section contains a ventilation region for the passage of air into the cooling section for mixing with the specified at least one component of the smoking material. In the ventilation region there are several rows of holes made in the outer wall of the cooling section, so that the holes in each row are circumferentially around this wall, and at least two adjacent rows of holes are axially spaced apart from each other in the axial direction by 0.25 -0.75 mm.

Description

The technical field to which the utility model relates.

A utility model relates to an article intended for use in a device for heating smoking material to vaporize at least one component of the smoking material.

State of the art

When using smoking articles, in particular cigarettes, cigars, etc., tobacco is burned, accompanied by the release of tobacco smoke. Attempts have been made to develop alternative smoking products that ensure the release of the required volatile compounds without creating tobacco smoke. Examples of such devices are so-called “heated rather than burning” products, also known as heated smoking articles, in which the desired ingredients are released by heating rather than burning tobacco. As the material, for example, either tobacco or a variety of non-tobacco substances or compositions may be used, which are a combined mixture containing or not containing nicotine. One example of such devices is the device for heating smoking material according to the patent RU 2595971. However, in the known device, the mouthpiece is located directly behind the heating chamber, so that when used, the vaporized components coming to the user have a sufficiently high temperature, causing the irritating effect of the heated vaporized material on the user's throat .

A smoking article is known according to the application WO2008 / 110934, comprising a tobacco rod and a filter having a ventilated cavity with a filter element at the end. The presence of a ventilated cavity between the tobacco rod and the filter element allows to reduce the temperature of the vaporized components entering the user. However, the location of the filter element at the end of the filter allows direct user contact with condensate generated in the filter element. In addition, the number and arrangement of rows of holes in the vented cavity of the known filter are not optimal from the point of view of ensuring sufficient visibility of the vaporized components of the smoking material, which, as confirmation of the allocation of the vaporized components, enhances the user's satisfaction.

The objective of the utility model is to eliminate these drawbacks of known devices, in particular, to reduce the temperature of the vaporized components arriving at the user with the exception of contact of the user with condensate formed in the filter element and with the formation of visible vaporized components of the smoking material coming to the user.

Utility Model Disclosure

This problem is solved in a smoking article for use in a device for heating smoking material in order to vaporize at least one component of the smoking material. This article comprises a body of smoking material and a unit including a cooling section for cooling at least one vaporized component of the smoking material; a filter section adjacent to the cooling section to filter at least one vaporized component of the smoking material; and a mouthpiece section adjacent to the filtering section adapted to be received by the user's mouth; however, the cooling section is located between the body of the smoking material and the filter section and contains a ventilation region for the passage of air into the cooling section for mixing with the specified at least one component of the smoking material, and in the ventilation region there are several rows of holes made in the outer wall of the cooling section so that the holes in each row are arranged circumferentially around this wall, and at least two adjacent rows of holes are spaced axially from each other along the ventilation area by 0.25 - 0.75 mm.

The utility model is illustrated by drawings.

Brief Description of the Drawings

In FIG. 1 shows a product according to a utility model, a view in longitudinal section;

in FIG. 2 - the product shown in FIG. 1 is a perspective view;

in FIG. 3 - product inserted into a smoking device, perspective view;

in FIG. 4 - product inserted into a smoking device, a view in longitudinal section;

in FIG. 5 is the same as in FIG. 4, perspective view.

Utility Model Implementation

Used in the description of the utility model, the term "smoking material" refers to a material containing components that, when heated, evaporate to form an aerosol. “Smoking material” may be tobacco or non-tobacco material. A “smoking material” may include, for example, one or more tobacco substances, that is, tobacco derivatives, in particular expanded tobacco, reconstituted tobacco, tobacco extract, homogenized tobacco, or tobacco substitutes. The smoking material may be in the form of ground tobacco, chopped tobacco leaves, extruded tobacco, gel or agglomerates. "Smoking material" may also include other, non-tobacco substances, which, depending on the composition, may or may not contain nicotine.

As used herein, the term "polyimide" refers to any polymer that contains or essentially contains a mixture of imide-forming monomers and may be saturated or unsaturated. Polyimide may be hydrophobic.

As used herein, the terms “flavoring agent” and “flavoring agent” refer to materials which, in accordance with local regulations, can be used as additives to impart a specific taste or aroma to a product intended for adult consumers. They may include extracts (e.g., licorice, hydrangea, white bark of Japanese magnolia, chamomile, fenugreek, clove, menthol, Japanese mint, anise, cinnamon, aromatic herbs, gaulteria, cherries, berries, peach, apple, drombui, bourbon, scotch tape, whiskey, spearmint, peppermint, lavender, cardamom, celery, cascarilla, nutmeg, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, cassia, cumin, cognac, jasmine ylang-ylang, sage, fennel, pimento, ginger, and Isa, coriander, coffee or peppermint oil from any plant in the peppermint family), flavor enhancers, bitterness eliminating agents, sensory activators or stimulants, sugar and / or its substitutes (e.g. sucralose, potassium acesulfame, aspartame, saccharin, cyclamates, lactose , sucrose, glucose, fructose, sorbitol or mannitol) and other additives such as charcoal, chlorophyll, minerals, plant materials or breath fresheners. They can be imitation, synthetic or natural ingredients or mixtures thereof. They may contain natural or natural identical aromatic chemicals. They may be in any suitable state, for example, in the form of an oil, liquid, powder or gel.

As used herein, the term “annular” means annular or ring-shaped. The term “circular” does not in essence mean round. According to some embodiments, the element presented in the description as “circular” can be really round, however according to other variants, the element presented as “circular” can differ from round, being, for example, elliptical or polygonal.

In FIG. 1 and 2, one embodiment of a smoking article 101 is shown according to a utility model. The article 101 is adapted for use in a device having a power source and a heater. Product 101 is particularly suitable for use in device 1, which is shown in FIG. 5 - 7 and will be described below. In use, the article 101 may be removably inserted into the inlet 20 of the device 1, as shown in FIG. 5.

The article 101 has a substantially cylindrical shape and comprises a body 103 of smoking material in the form of a rod, as well as a filter assembly 105 in the form of a rod. The filter assembly 105 comprises three sections: a cooling section 107; filter section 109; and section 111 of the mouthpiece. The article 101 has a first end 113, also called a mouthpiece section or a front end, and a second end 115, also called a rear end. The body 103 of smoking material extends towards the rear end 115 of the article 101. The cooling section 107 is located between the body 103 of the smoking material and the filtering section 109, while the cooling section 107 may abut the body 103 of the smoking material and the filtering section 109. However, the body 103 of smoking material and the cooling section 107, as well as the body 103 of smoking material and the filter section 109 can be separated from each other by a gap. The mouthpiece section 111 extends from the filter section 109 towards the front end 113 of the article 101. The filter section 109 may abut the mouthpiece section 111. The total length of the filter assembly 105 is from 37 to 45 mm, more preferably 41 mm.

The body 103 of smoking material may contain tobacco, or consist of tobacco, may consist essentially of tobacco, or contain tobacco and smoking substances other than tobacco, may contain smoking substances other than tobacco and not contain tobacco. The smoking material may contain an aerosol forming substance, for example glycerin.

The body 103 of smoking material has a length of 34 to 50 mm, more preferably 38 to 46 mm, and most preferably 42 mm.

The total length of the article 101 is 71 to 95 mm, more preferably 79 to 87 mm, and most preferably 83 mm.

The end of the body 103 of smoking material may coincide with the rear end 115 of the article 101, or an end member (not shown) covering the end of the body 103 of smoking material may be installed on the rear end 115 of the article 101.

The body 103 of smoking material is connected to the filtering unit 105 through an annular rim paper (not shown), which is located essentially on the periphery of the filtering unit 105 and covers the filtering unit 105, extending to a part of the body 103 of the smoking material. As the rim paper, standard 58GSM paper can be used. The rim paper has a length of 42 to 50 mm, preferably 46 mm.

The cooling section 107 is a circular tube and is located in the smoking article 101 with the formation of an annular air gap. An air gap allows passage of the heated vaporized components of the body 103 of smoking material. The cooling section 107 has a cavity that acts as a chamber for collecting aerosol, while the cooling section has sufficient rigidity to withstand the axial compressive forces and bending moments that occur when the article 101 is inserted into the corresponding device 1. The wall thickness of the cooling section 107 is approximately 0, 29 mm

The cooling section 107 provides physical separation of the body 103 of smoking material and the filter section 109. The physical separation provided by the cooling section 107 leads to a temperature gradient along the length of the cooling section 107. The cooling section 107 is capable of providing a temperature difference of at least 40 ° C between the heated vaporized component entering into the cooling section 107, and a heated vaporized component exiting the cooling section 107. Preferably, the cooling section 107 is capable of providing a temperature difference at least 60 ° C between the heated evaporated component entering the cooling section 107 and the heated evaporated component leaving the cooling section 107. Thus, the temperature difference created along the length of the cooling section 107 prevents the high temperature temperature of the filtering section 109 from smoking material 103 heated in the heater of the device 1. If physical separation of the filter section 109 and the body 103 of smoking material is not provided, when the product is heated in the device 1, it may be damaged ene thermosensitive filter section, and reducing the effectiveness of its actions.

The length of the cooling section 107 is at least 15 mm. The length of the cooling section 107 may be from 20 to 30 mm, more preferably from 23 to 27 mm, in particular from 25 to 27 mm, preferably 25 mm.

The cooling section 107 is made of paper, that is, of a material which, being close to the heater of the device 1, does not form compounds harmful to the user, for example, toxic compounds. The cooling section 107 is a spirally wound paper tube that forms a hollow inner chamber and imparts mechanical rigidity to the cooling section 107. Spiral wound paper tubes satisfy the tight tolerances established for high-speed processes, in particular, tolerances for length, outer diameter, roundness and straightness.

In addition, the cooling section 107 may be formed by cutout in a dense wrapper or rim paper. Thick wrapping or rim paper during their manufacture is given sufficient rigidity to withstand axial compression forces and bending moments that occur when the product 101 is introduced into the device 1.

In any case, the cooling section 107 has sufficient dimensional accuracy that meets the requirements set for high-speed processes.

The filter section 109 may be formed from any filter material capable of removing one or more components vaporized by heating the smoking material. The filtering section 109 can be made of monoacetate, namely cellulose acetate. The filtering section 109 provides cooling and reduces the irritating effect of the heated vaporized components without reducing the amount of heated vaporized components to a level that causes user dissatisfaction.

Due to the density of cellulose acetate used as the material for the manufacture of the filter section 109, the pressure drop along the length of the filter section 109 is controlled, thereby adjusting the tightness of the product 101. Thus, the choice of material of the filtering section 109 of the product 101 is essential for adjusting the tightness . In addition, the filter section in the product 101 performs the filtering function.

The filter section 109 may be made of 8Y15 brand filter tow, which is able to provide the desired filtering effect of the heated vaporized material and reduce the droplet size of the condensed aerosol formed from the heated vaporized material, thereby reducing the irritating effect of the heated vaporized material on the user's throat to a satisfactory level.

The filter section 109 provides additional cooling of the heated vaporized components that exit the cooling section 107. This additional cooling reduces the temperature of the surface of the filter section 109 in contact with the user's lips.

One or more flavors can be added to the filtering section 109 either by directly introducing flavored liquids into the filtering section 109, or by introducing or placing one or more fragile fragrance capsules or other aromatic carriers into cellulose acetate tows of the filtering section 109.

The filter section 109 has a length of from 6 to 10 mm, preferably 8 mm.

Mouthpiece section 111 is a circular tube forming an air gap within this section. The air gap allows the passage of heated vaporized components leaving the filter section 109. The mouthpiece section 111, being hollow, forms a chamber for aerosol accumulation and has sufficient rigidity to withstand axial compression forces and bending moments that may occur during manufacture, as well as during insertion products into the device 1. The wall thickness of the mouthpiece section 111 is approximately 0.29 mm.

The length of the mouthpiece section 111 is from 6 to 10 mm, preferably 8 mm.

The mouthpiece section 111 is a spirally wound paper tube that forms a hollow inner chamber and imparts mechanical rigidity to the mouthpiece section 111. Spiral wound paper tubes satisfy the tight tolerances established for high-speed processes, in particular, tolerances for length, outer diameter, roundness and straightness.

Mouthpiece section 111 prevents direct user contact with condensate accumulating at the outlet of filter section 109.

It should be noted that the mouthpiece section 111 and the cooling section 107 are made in the form of a single cylindrical tube, while the filtering section 109 separates the mouthpiece section 111 and the cooling section 107 from each other inside this tube.

The article 101 includes a ventilation region 117 that allows outside air to enter the article 101. The ventilation region 117 can be formed by one or more ventilation holes 117 in the outer surface of the article 101. The cooling section 107 may have ventilation holes that help cool the article 101. Ventilation region 117 contains one or more rows of holes, wherein the holes of each row are located around the circumference of the article 101 in a cross section substantially perpendicular longitudinal axis of the product 101.

To provide ventilation for the article 101, one to four rows of ventilation openings may be provided. Each row may have 12 to 36 openings 117. The diameter of the ventilation openings 117 may be from 100 to 500 microns. The axial spacing of the rows of ventilation holes 317 may range from 0.25 to 0.75 mm, most preferably 0.5 mm.

The vents 117 may have either the same size or different sizes. The ventilation openings can be made in any suitable way, for example, using laser technology, mechanical perforation of the cooling section 107 or preliminary perforation of the cooling section 107 prior to assembly of the article 101. The ventilation openings 117 are arranged so as to ensure efficient cooling of the article 101.

The rows of ventilation holes 117 are at least 11 mm distant from the front end 113 of the article, more preferably 17 to 20 mm apart. With this arrangement of ventilation holes 117, it is not possible to block these ventilation holes 117 during use of the product 101 by the consumer.

The arrangement of rows of ventilation holes at a distance of 17 to 20 mm from the front end 113 of the article 101 is preferable since the ventilation holes 117 are outside the device 1 when the article 101 is inserted into the device 1, as shown in FIG. 4 and 5. When the ventilation openings are outside the apparatus 1, unheated outside air may enter the article 101 through these openings, thereby cooling the article 101.

The cooling section 107 is so long that this cooling section 107 is partially inside the device 1 when the product 101 is inserted into the device 1. Such a length of the cooling section 107 is selected so as to create a physical gap between the heater of the device 1 and the heat-sensitive filter section 109, and so that the ventilation openings 117 formed in the cooling section 107 are outside the apparatus 1 when the article 101 is inserted into the apparatus 1. As shown in FIG. 4 and 5, most of the cooling section 107 is located inside the device 1, and only some of the cooling section 107 protrudes from the device 1. It is on the part of the cooling section 107 that protrudes from the device 1 that the ventilation holes 117 are formed.

The device 1, shown in more detail in FIG. 3 to 5, by way of example, are intended to heat smoking material to vaporize at least one component of this smoking material, typically with the formation of an aerosol that the user can inhale. Device 1 is a heating device capable of releasing components of a smoking material by heating it, and not as a result of its combustion.

The first end 3 is sometimes referred to here as the input or front end 3 of the device 1, and the second end 5 is sometimes referred to here as the rear end 5 of the device 1. The device 1 has an on / off button 7 so that the user can turn the device 1 on and off as desired.

The device 1 has a housing 9, which protects against external damage placed in it components. In the presented embodiment, the housing 9 contains a closed shell 11, which covers the outer perimeter of the device 1, the upper panel 17, which, as a rule, defines the "upper part" of the device 1, and the lower panel 19, which, as a rule, defines the "lower part" devices 1. In another embodiment, the housing, in addition to the upper panel 17 and the lower panel 19, comprises a front panel, a rear panel and a pair of opposite side panels.

The upper panel 17 and / or the lower panel 19 can be detached to the closed shell 11 to provide free access to the inside of the device 1 or can be fixed to the closed shell 11 permanently to prevent user access to the inside of the device 1. Panels 17 and 19 can be made of plastic material, in particular glass-filled nylon, by injection molding, and the closed shell 11 can be made of aluminum, although other materials can be used Materials and other technological processes.

In the upper panel 17 of the device 1, i.e. at the inlet end 3 of the device 1, a hole 20 is made through which the consumer can insert a product 101, 301 containing smoking material into the device 1 and remove it from this device.

The housing 9 contains located and fixed inside it: a heater 23, a control circuit 25 and a power source 27. In this case, the heater 23, the control circuit 25 and the power supply 27 are adjacent in the lateral direction (i.e. are located adjacent, when viewed from one of the ends), while the control circuit 25 is mainly located between the heater 23 and the power supply 27, although other arrangements are possible.

The control circuit 25 may include a controller, for example, a microprocessor, designed to control the heating of the smoking material in the consumable product 101, 301, as will be described below.

The power source 27 may be, for example, a battery, which may be rechargeable or non-rechargeable. Suitable batteries may be, for example, a lithium-ion battery, a nickel battery (e.g., nickel-cadmium), an alkaline battery, and the like. The battery 27 is electrically connected to the heater 23, providing, upon demand, an adjustable electric power supply for heating the smoking material in the product (for the purpose of evaporating the smoking material without burning it), regulated by the control circuit 25.

Since the power supply 27 in the device 1 is adjacent to the side of the heater 23, a large size power supply 27 can be used without overly increasing the size of the device 1 as a whole. Undoubtedly, the large-sized power supply 27 has a large capacity (i.e., has a large energy reserve), which is usually measured in ampere-hours or the like. and thus, in the device 1, the battery life can be increased.

The heater 23 can be made in the form of a hollow cylindrical tube containing a hollow heating chamber 29, into which an article 101 with smoking material is inserted to heat it when used. Various designs of heater 23 are possible, for example, heater 23 may comprise either one or more heating elements aligned along the longitudinal axis of heater 23. Each heating element may be annular or tubular, or at least partially annular or partially tubular. The heating element may be thin film. Also, the heating element may be made of ceramic material. Suitable ceramic materials are alumina, aluminum nitride, and also silicon nitride-based ceramic materials that have been laminated and sintered. Other types of heating are allowed, including induction heating, heating by infrared heating elements, and heating by resistive heating elements forming a coil.

In a specific embodiment, the heater 23 is supported by a stainless steel support tube and comprises a polyimide heating element. The dimensions of the heater 23 are selected so that essentially the entire body 103 of smoking material of the article 101 is inside this heater 23 when the article 101 is inserted into the device 1.

It is possible that the heating elements are arranged so that, depending on the consumer’s wishes, either individual, for example, sequential (gradual) heating of individual sections of the smoking material, or joint (simultaneous) heating is provided.

According to the presented embodiment, a heat insulator 31 is located along at least a portion of the heater 23, embracing it. The propagation of heat from the heater 23 to the outside of the device 1 reduces the insulator 31. Due to the reduction of heat losses, lower heater power is required for heating. In addition, during the operation of the heater 23, the insulator 31 does not allow heating of the outer surface of the device 1. The insulator 31 may be a double-walled casing, between the walls of which a reduced pressure region is created. Thus, the insulator 31 may be, for example, a “vacuum” pipe, that is, a pipe that is at least partially evacuated in order to minimize heat transfer due to heat conduction and / or convection. Other designs of insulator 31 are possible, including using heat-insulating materials, including, for example, suitable foam material, in addition to or instead of a double-walled casing.

Inside the housing 9, various auxiliary support elements 37 may be provided to support all internal components, including a heater 23.

The device 1 further comprises an annular sleeve 33, which protrudes from the hole 20 and extends into the housing 9, namely, into the tubular chamber 35, which is located between the sleeve 33 and one end of the “vacuum” casing 31. The chamber 35 has a cooling structure 35f, which contains a plurality of cooling ribs 35f spaced along the entire length of the outer surface of the chamber 35 and extending around the outer surface of the chamber 35. When the article 101 is at least partially inserted into the device 1, between the tube chamber 35 and the article 101 etsya air gap 36. The air gap 36 surrounds the outer surface of the product 101 for at least part of the cooling section 107.

The sleeve 33 contains several protrusions 60, which are located around the perimeter of the hole 20 and extend into the hole 20. The protrusions 60 occupy the space inside the hole 20, while inside the hole 20 the free space at the locations of the protrusions 60 is less than the free space inside the hole 20 without protrusions 60. The protrusions 60 are capable of engaging with the product 101 inserted into the device 1, securing it to the device 1. The open spaces (not shown in the drawings) defined by the product 101 and two adjacent projections 60 form a tsevye vents around the outer surface of the article 101. These vents allow hot vapors emitted product 101, extend beyond the device 1 and along with it create a passage for admission of cooling air in apparatus 1, more precisely, into the air gap 36, which covers the product 101.

The article 101 to be used can be inserted removably into the inlet 20 of the device 1, as shown in FIG. 3 to 5. In FIG. 4, an example is shown of an article 101 inserted by the rear end 115 into the device 1, with the entire body of smoking material 103 located in the heater 23 of the device 1. The front end 113 of the article 101 protrudes from the device 1 and acts as a mouthpiece for the user.

In operation, the heater 23 heats the consumable article 101 to vaporize at least one component of the smoking material forming the body 103 of smoking material.

The primary stream of heated components of the smoking material vaporized from the body 103 of smoking material passes axially through the inner chamber of the cooling section 107, through the filtering section 109, through the section 111 of the mouthpiece of the article 101 and arrives at the user. The temperature of the components heated from the body of the smoking material can be from 60 to 250 ° C, which exceeds the inhalation temperature acceptable for the user. The heated vaporized components are cooled as they pass through the cooling section 107, and some of the vaporized components condense on the inner surface of the cooling section 107.

In article 101, shown by way of example in FIG. 1 and 2, cold air can enter the cooling section 107 through ventilation openings 117 provided in the cooling section 107. The cold air will mix with the heated vaporized components, thereby providing additional cooling to the heated vaporized components.

When using the device 1, the article 101 heats up, ventilation helps to ensure that the selected heated vaporized components of the smoking material become visible. Heated vaporized components become visible when aerosol oversaturation occurs during cooling. With further cooling, some of the evaporated components create droplets, otherwise called condensation centers, due to further condensation, and due to the coagulation of newly formed droplets, the size of aerosol particles formed from the evaporated components increases.

The ratio of the volume of cold air to the total volume of heated vaporized components and cold air, known as the ventilation coefficient, is at least 15%. With a ventilation coefficient of 15%, the vaporized components become visible as described above. The visual perception of the vaporized components is a confirmation of the release of the vaporized components, which enhances the user's satisfaction.

For additional cooling of hot evaporated components, the ventilation coefficient can be from 50% to 85%.

The essence of the utility model, aimed at eliminating existing problems and improving the prior art, is fully disclosed by describing various options for its implementation, illustrated as an example and practical application of the utility model, making it possible to create a high-quality product for use with a device for heating smoking material before the evaporation of at least one component of the smoking material. The advantages and features of the utility model are an exceptionally representative sample of embodiments of the utility model and are not exhaustive and / or exclusive. They are presented only to facilitate understanding and explanation of the described and otherwise disclosed features. It should be understood that the advantages, embodiments, examples, functions, features, structures and / or other aspects of the utility model should not be construed as limiting this utility model defined by its formula to its equivalents, and that other embodiments of the utility model are possible, and changes are allowed. that do not go beyond the scope and / or essence of the utility model.

Claims (5)

1. A smoking article for use in a device for heating smoking material to vaporize at least one component of smoking material, comprising a body of smoking material and an assembly including a cooling section for cooling at least one vaporized component of smoking material; a filter section adjacent to the cooling section to filter at least one vaporized component of the smoking material; and a mouthpiece section adjacent to the filtering section adapted to be received by the user's mouth; however, the cooling section is located between the body of the smoking material and the filter section and contains a ventilation region for the passage of air into the cooling section for mixing with the specified at least one component of the smoking material, and in the ventilation region there are several rows of holes made in the outer wall of the cooling section so that the holes in each row are arranged circumferentially around this wall, and at least two adjacent rows of holes are spaced axially from each other along the ventilation area by 0.25-0.75 mm. 2. The product according to claim 1, in which at least two adjacent rows of holes are spaced apart from each other in the axial direction along the ventilation region by 0.5 mm. 3. The product according to any one of paragraphs. 1 or 2, in which the ventilation region is at least 11 mm away from the proximal end of the mouthpiece section. 4. The product according to any one of paragraphs. 1-3, in which the diameter of at least one of the holes is from 100 to 500 microns. 5. The product according to any one of paragraphs. 1-4, the total length of which is from 71 to 95 mm.

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