1. Field of the Invention
The present invention relates to an apparatus for manufacturing a cigarette filter including a string impregnated with a flavoring or the like, and a method of manufacturing the cigarette filter.
2. Description of the Related Art
For example, a cigarette which achieves unique flavor by extending a plurality of threads impregnated with menthol through a filter, and an apparatus of manufacturing the cigarette filter are disclosed. The cigarette filter manufacturing apparatus comprises a duct-like tongue having a tapering shape, a convergence guide which is provided more upstream than the tongue and configured to supply a filter tow to the tongue, a plurality of cylindrical needles which supply threads impregnated with menthol or the like into the tongue, and a stuffer jet which feeds the filter tow to the convergence guide by using air pressure.
The needles are arranged from the outside of the tongue into the tongue, in an oblique direction, not a direction perpendicular to the central axis of the tongue. A plurality of threads which are fed through the needles are conveyed together with the filter tow, and arranged in predetermined positions in the filter (see Patent Literature 1).
In addition, there is a cigarette filter manufacturing apparatus which supplies a thread to a filter tow by a thread supply tube. In this example, in the tongue, a thread is supplied from below to the filter tow, and thereby a filter in which the thread extends through a cross section thereof is formed (see Patent Literature 2).
In the same manner, there is another example of a cigarette filter manufacturing apparatus, which supplies a thread to a filter tow by a thread supply tube. In the apparatus, a thread is supplied from above to a flow of the filter tow, and thereby a filter in which the thread extends through a cross section thereof is formed (see Patent Literature 3).
Patent Literature 1: International Publication No. 2010/108739A1
Patent Literature 2: Jpn. PCT National Publication No. 2005-521399
Patent Literature 3: Jpn. PCT National Publication No. 2010-504736
In Patent Literature 1, however, the filter tow in the tongue is continuously pulled downstream by a garniture tape. Thus, when the needles are simply arranged obliquely toward the inside of the tongue as described above, the threads tend to gather toward the central axis of the tongue. So, it is difficult to arrange the threads to disperse at regular intervals in a cross section of the filter.
In addition, although a plurality of threads may be supplied by using the single thread supply tube in the apparatuses of Patent Literatures 2 and 3, no measures can be taken for the density of the filter tow, and consequently the threads undesirably crowd. In addition, since the apparatuses have the structure in which a thread is supplied to the filter tow from above or below, there is the problem that a plurality of threads are concentrated to a peripheral part of the filter.
A cigarette filter manufacturing apparatus according to an embodiment of the present invention comprises a stuffer jet which feeds a tow together with air, a tongue which molds the tow into a bar, a convergence guide which is provided in a position between the stuffer jet and the tongue, and converges the tow while guiding the tow toward the tongue, and a plurality of thread introducing tubes which extend in a position between an outlet of the stuffer jet and an introducing part of the tongue such that intervals between the thread introducing tubes are gradually reduced toward the downstream, and supply respective threads into the tow from their downstream distal ends.
A method of manufacturing a cigarette filter according to an embodiment of the present invention comprises: supplying a plurality of threads from distal ends of thread introducing tubes which extend in a position between an outlet of the stuffer jet and an introducing part of the tongue such that intervals between the thread introducing tubes are gradually reduced toward the downstream; and molding the tow including the threads into a bar in the tongue.
According to the above structure, it is possible to provide a cigarette filter manufacturing apparatus and a cigarette filter manufacturing method, which enable arrangement of threads at regular intervals in the filter.
As illustrated in
The tow processing section 12 includes a bail 16, which contains a filter material formed of cellulose acetate fibers, that is, tow, and a tow channel 17 extends from the bail 16. A primary banding jet 21, a guide roller 22, a pair of pretension rollers 23, a pair of blooming rollers 24, a secondary banding jet 25, and a pair of feeding rollers 26 are arranged in this order from the bail 16 in the tow channel 17, and the feeding rollers 26 are arranged at the end of the tow channel 17.
When a tow 18 which is sent out of the bail 16 passes through the primary banding jet 21, the primary banding jet 21 jets out compressed air from the bail 16 toward the tow 18. The compressed air jetted increases (spread) intervals between fibers of the tow 18, and moderately stretches crimps of the tow 18.
The pretension rollers 23 provides the tow 18 with predetermined tension in cooperation with the blooming rollers 24, to further stretch the crimps of the tow 18. The blooming rollers 24 feed the tow 18, in which intervals between fibers have been increased, to the secondary banding jet 25.
The secondary banding jet 25 jets out compressed air toward the bundle of the tow 18, and further increases intervals between fibers of the bundle. As a result, the bundle of the tow 18 spreads in a width direction of the tow channel 17, and forms a flat filter web 27. Thereafter, the filter web 27 passes through the feeding rollers 26. A plasticizer such as triacetin is transferred in advance to the feeding rollers 26 by the plasticizer transfer section 13. When the feeding rollers 26 send the filter web 27 (tow 18), the forwarding rollers 26 can supply the transferred plasticizer to the filter web 27.
The filter web 27 (tow, that is, cellulose acetate fibers), to which the plasticizer has been added, is provided with adhesiveness by the effect of dissolution of acetate by the plasticizer. Bonding points which are bonded by adhesiveness are formed in a plurality of positions between adjacent acetate fibers. The filter web 27 (tow 18) is sent to the stuffer jet 41 of the molding section 14 by the feeding rollers 26. A spray nozzle may be provided above the filter web 27 in a position between the feeding rollers 26 and the stuffer jet 41, and the plasticizer may be sprayed on the filter web 27 from the spray nozzle.
As illustrated in
The stuffer jet 41 includes an outlet 46, from which the tow 18 is discharged, and an edge part 47 which defines the periphery of the outlet 46. The convergence guide 43 includes a plurality of air vents 48 to let the air out. The convergence guide 43 has a roughly funnel shape. The convergence guide 43 can converge the tow 18 to a certain degree, while guiding the tow 18 sent from the stuffer jet 41 toward the tongue 42. As illustrated in
Although there are three thread introducing tubes 45 in the present embodiment, this number is not limited. Two or four thread introducing tubes 45 may be used. Each thread introducing tube 45 is formed in a cylindrical shape by, for example, a metal material. Threads 44 (string) run through the respective thread introducing tubes 45, and thereby the threads 44 can be supplied to the tow 18 running through the convergence guide 43. The threads 44 may contain a flavoring, such as a menthol flavoring solution and a tobacco extracted solution, or may be colored with any color. The threads 44 may be impregnated with different types of flavorings or colored with different colors, or the same flavoring or color.
As illustrated in
The distal end 52 is provided in a position between the outlet 46 of the stuffer jet 41 and an introducing part 42A of the tongue 42, more specifically, inside the convergence guide 43. The distal end 52 extends in a direction parallel with (parallel with the stream of the tow 18) a central axis 41A of (the outlet 46 of) the stuffer jet 41. The bent part 53 extends from the fixed part 51 in a direction parallel with the stuffer jet 41, and then obliquely extends to go toward a radial inside of the stuffer jet 41. Specifically, intervals between the bent parts 53 are reduced toward the downstream in a position between the outlet 46 of the stuffer jet 41 and the introducing part 42A of the tongue 42. In addition, the distal end 52 of each thread introducing tube 45 is provided in a position inner than the edge part 47 of the stuffer jet 41. As illustrated in
As illustrated in
As illustrated in
At the inlet of the wrapping section 15, a paper web 55 is supplied onto the garniture tape 54. The paper web 55 is guided from a paper roll to the garniture tape 54 through a spray gun 56. The spray gun 56 applies an adhesive, that is, rail glue, to a center of the paper web 55 in the width direction of the paper web 55.
The rod member is superposed on the paper web 55 at the inlet of the wrapping section 15. The rod member and the paper web 55 are adhered to each other with the rail glue. Thereafter, the rod member and the paper web 55 run on the molding bed together with the garniture tape 54, and successively pass through the tongue 42, the wrapping former, the heater, and the cooler.
The tongue 42 further compresses the rod member (tow 18) through the garniture tape 54 and the paper web 55, in cooperation with the molding bed. In this processing, a cross section of the rod member is molded to have a circular shape, and the paper web 55 and the garniture tape 54 are bent to have a U-shaped cross section. At this point in time, the lower half of the rod member is covered with the paper web 55.
Thereafter, while the rod member passes through the wrapping former, a side edge part of the paper web 55 is put on one side of the upper half of the rod member with the garniture tape 54, and simultaneously a glue spray (not shown) of the wrapping former applies seam glue to the other side edge of the paper web 55. Then, the other side edge of the paper web 55 is put on the rod member with the garniture tape 54 in the same manner, and superposed on one side edge of the paper web 55 with the seam glue interposed therebetween. At this point in time, the both side edges of the paper web 55 are adhered by the seam glue, and the rod member is entirely wrapped in the paper web 55. Thereby, a filter rod continuous member 57 is formed.
When the filter rod continuous member 57 passes through the heater and the cooler, the seam glue is successively dried and cooled. The wrapping section 15 includes a rotating knife 58 in a downstream position of the garniture tape 54. The rotating knife 58 cuts the filter rod continuous member 57 into individual filter rods, and thereby cigarette filters 61 as illustrated in
Functions of the thread introducing tubes 45, each of which includes the distal end 52 in the convergence guide 43, and the convergence guide 43 will be explained with reference to
In addition, in the cigarette filter manufacturing apparatus according to the present embodiment, the distal ends 52 of the thread introducing tubes 45 extend in a direction parallel with the central axis 41A (the stream of the tow 18) of the stuffer jet 41, as illustrated in
According to the present embodiment, the cigarette filter manufacturing apparatus 11 comprises the stuffer jet 41 which sends the tow 18 together with air, the tongue 42 which molds the tow 18 into a bar, the convergence guide 43 which is provided in a position between the stuffer jet 41 and the tongue 42 and converges the tow 18 while guiding the tow 18 toward the tongue 42, and a plurality of thread introducing tubes 45, intervals between which are reduced toward the downstream in a position between the outlet 46 of the stuffer jet 41 and the introducing part 42A of the tongue 42, and which supplies respective threads 44 from the respective downstream distal ends 52 into the tow 18.
According to the cigarette filter manufacturing method of the present embodiment, a plurality of threads 44 are supplied from distal ends 52 of the thread introducing tubes 45 which extend such that intervals between them are reduced toward downstream in a position between the outlet 46 of the stuffer jet 41 and the introducing part 42A of the tongue 42, and the tow 18 including the threads 44 are molded into a bar in the tongue 42.
Generally, concentration of the threads 44 into the central part in the cigarette filter 61 deteriorates the appearance of the product, and causes defects such as undesirable transfer of the flavoring contained in one thread 44 to another thread 44.
According to the above structure, the distal ends 52 of the thread introducing tubes 45 extend in parallel with the central axis 41A of the stuffer jet 41 (parallel with the stream of the tow 18), and thus the direction of letting out the threads 44 can be defined by the distal ends 52 when the threads 44 are let out. Thereby, when the filter tow 18 is sent together with the threads 44, the threads 44 do not concentrate in the central part of the cigarette filter 61, and the threads 44 can be arranged at regular intervals in a cross section of the cigarette filter 61. Thereby, the desired flavor can be obtained as a cigarette, and the product can be manufactured with a good appearance.
In addition, in the present embodiment, the distal ends 52 of the thread introducing tubes 45 are arranged in the convergence guide 43. Thus, the distal ends 52 of the thread introducing tubes 45 can be arranged in positions before a part where the density of the tow 18 increases. Thereby, the distal ends of the thread introducing tubes 45 do not prevent the stream of the tow 18, and the frequency of malfunctions, such as the problem that the apparatus is clogged with the tow 18, is reduced. Even when the threads 44 are introduced into the tow 18 in the convergence guide 43, the threads 44 do not move thereafter or have a concentrated arrangement. This is because the filling density is uniform between the tow 18 in the position among the distal ends 52 of the thread introducing tubes 45 and the tow 18 located outside the thread introducing tubes 45, when the tow 18 is sent through the convergence guide 43, and the relative positions of the threads 44 in the cross section of the cigarette filter 61 are not changed even when the whole tow 18 is compressed thereafter in the tongue 42.
Further, according to the present embodiment, the thread introducing tubes 45 are arranged at regular intervals around the outlet 46 of the stuffer jet 41. Thus, the threads 44 can be arranged with a good appearance in the cross section of the cigarette filter 61.
The present invention is not limited to the above embodiment. For example, although the distal ends 52 of the thread introducing tubes 45 are provided in the convergence guide 43 in the above embodiment, the distal ends 52 may be arranged in the introducing part 42A of the tongue 42. Other various modifications can be performed within a range of the gist of the invention, as a matter of course.
This application is a Continuation Application of PCT Application No. PCT/JP2011/053716, filed Feb. 21, 2011, the entire contents of which are incorporated herein by reference.
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Number | Date | Country | |
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Number | Date | Country | |
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Parent | PCT/JP2011/053716 | Feb 2011 | US |
Child | 13971400 | US |