JP2010273677A - Preparation of filter material strap of tobacco-processing industry - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve preparation treatment of a filter material strap. <P>SOLUTION: An apparatus equipped with a coating device (47) having a housing (50) for applying a liquid additive to a strap (2) and preparing one transported strap (2), particularly a filter tow strap, from a filter material of the tobacco-processing industry along a conveyance section for the strap (2) and a method therefor are provided. In the apparatus, at least two suction ports (63, 64) of a suction device or at least two suction ports (63, 64) of a plurality of suction devices are installed at least on one of the rear of the coating device (47) and a region from the coating device (47) to the outlet of the strap (2) in relation to the transport direction of the strap (2), and the strap (2) is transported or can be transported between the openings. Machines for the tobacco processing industry, particularly machines for continuously producing filters are also provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention comprises an applicator having a housing for applying a liquid additive to a strip, and an apparatus for preparing at least one transported strip, particularly a filter tow strip, from a filter material of the tobacco processing industry along a transport section; Regarding the method. The invention further relates to a machine in the tobacco processing industry, in particular a filter manufacturing machine.

  To produce a filter rod for the tobacco processing industry, a band of interconnected fibers, such as cellulose acetate, consisting of filter material, in particular filter tow, is continuously drawn and expanded from a reservoir, such as valene, Elongated, sprayed with plasticizer, e.g. triacetin, folded sideways, blown air is supplied to the funnel and subsequently the funnel, and the prepared and concentrated filter strip is supplied to the continuous filter production machine . In the continuous filter manufacturing machine, the band formed on the filter strand is continuously packed by the packing material band under further concentration, and therefore the filter rod is cut from the packaged filter strand.

  A device of this kind is known from EP 0 654 224 (Patent Document 1).

  A reliable preparation device of the kind mentioned above is constructed and sold under the names of applicants AF2, AF3 and AF4. Certain types of continuous filter production machines of the aforementioned kind are constructed and sold under the names of the applicants KDF2, KDF3 and KDF4.

  Furthermore, German Patent Application No. 10031848 (Patent Document 2) describes an apparatus for producing a filter rod for a rod-shaped article in the tobacco processing industry, in which a filter tow belt extends, a coating section, Passed along the folding section. A suction device is arranged in the area of at least one roller pair in the section, and air is sucked out in the area of the roller pair.

  Furthermore, DE 102005051523 (Patent Document 3) discloses an apparatus and method for preparing at least one strip of filter material from the tobacco processing industry. In this case, air from the periphery of the coating device is sucked out of the housing of the coating device by the suction device.

  Furthermore, from European Patent Application No. 1325685 (Patent Document 4), an apparatus and method for preparing at least one strip of filter material for the tobacco processing industry is described, which is arranged in the transport section of the strip on the suction side. And a suction device connected to the compressed air member on the pressure side.

EP 0654224 German Patent Application No. 10031848 German Patent Application No. 102005051523 European Patent Application No. 1325685 US Pat. No. 4,259,769 US Pat. No. 3,317,965 U.S. Pat. No. 3,255,506 US Pat. No. 5,590,449

  Starting from these prior arts, the object of the present invention is to improve the preparation process of the filter strip.

  The object is to provide an applicator having a housing for applying a liquid additive to a strip, and to prepare at least one transported strip, particularly a filter tow strip, from a filter material in the tobacco processing industry along a transport section. , At least two suction openings of the suction device or at least two suction openings of the plurality of suction devices are provided at the rear of the coating device and at least one of the exit area of the belt from the coating device with respect to the transport direction of the belt. This is solved by the fact that the belt is transported or can be transported.

  In the present invention, at least one of particles and fluff carried by the transported strip of filter material in the outlet region of the coating device, particularly the outlet region of the housing of the coating device, has absorbed triacetin in the ambient air. The strip is removed from the strip so that the flocs that have absorbed the triacetin are also avoided in the strip, because the flocculent that has sucked triacetin causes the melting holes ( This is because holes can occur in the filter produced therefrom. This avoids fluff collection near or in the outflow area of the applicator or spray chamber, and the suction of ambient air is performed on both sides of the filter strip.

  According to the invention, the filter strip is passed between the upper and lower sides of the suction openings, which are arranged in particular laterally, to remove flint from the particularly lateral region of the outflow of the filter strip at the outlet of the spreading chamber. In this case, suction of the collected cotton dust is carried out laterally and thereby across the conveying direction of the filter material strip in the conveying section, in which the coating device is arranged with its housing in particular. . In particular, in the area of the outflow clearance of the housing and thereby inside the conveying section of the filter material band between the two roller pairs, ambient air is sucked out together with the cotton dust at the application device or the direct connection to the housing, and the roller A conveying section or a coating section is formed with the conveying device through the pair or is limited.

  Within the scope of the present invention, each suction opening for sucking in ambient air is arranged at the top of the transported band in the connection to the coating device and at the same time one outlet opening in the connection to the coating device. Since it is arrange | positioned at the lower part of the conveyed belt | band | zone, it can consider that ambient air is inhaled from the upper surface and lower surface of a belt | band | zone.

  Furthermore, this problem is applied in the belt transport direction, and the suction device is connected to at least one of the lateral suction opening and the cotton dust separation chamber after the coating device or at least in the outflow region of the belt from the coating device. In particular, the suction device is provided with two suction openings, between which the belt flowing out of the coating device can be transported or transported, so that it can be solved in a selective manner or the device is reproduced .

  According to the present invention, since the ambient air in the transported belt region is sucked out by the suction device, the peripheral floating triacetin-containing cotton dust is removed from the transport region of the belt, and the cotton dust in the sucked-out ambient air is subsequently removed. They are separated in a cotton dust separation chamber or a cotton dust separation device.

  In this case, the selective idea or other idea of the present invention is that the filter material is filtered by the suction device after at least one of the carried filter material belt and the cotton dust or particles accompanied by the suction is removed by suction. Fed from the perimeter of the strip to the separation device or chamber and separated from the cotton dust and / or from the particles as the cotton dust and possibly particles are separated from the triacetin droplets and contaminated or achieved ambient air. The ambient air is subsequently separated from the triacetin in another preparatory process, and the resulting triacetin is prepared to spray the filter media strip from the ambient air.

  According to the reproduction mode, it is further proposed that the suction openings of the suction device or the suction devices are diagonally opposed to the suction surfaces, that is, not aligned with the transport direction of the band. As a result, the fluff and triacetin droplets that have absorbed triacetin are present, or the floating ambient air is exhausted. At the direct connection to the outside of the applicator housing or on both sides of the material strip, it is removed by suction or suction.

  For this purpose, it is further preferred when one suction connection pipe is provided on each side surface or narrow side surface or on the side of the belt to be transported or transported, with suction openings formed respectively.

  For this purpose, the suction connection pipe is further aligned laterally, in particular laterally outwards or on the transport plane of the strip, in particular inclined downwardly in the transport section, or the suction connection pipe is linear, i.e. It is contemplated that it is molded without bending.

  In addition, the reproduction mode of the apparatus is characterized in that the suction connection pipe communicates with the common fluff separation chamber on the negative pressure side or is connected to the common fluff separation chamber. Due to the straight formation of the suction connection pipe, the flocs are transported directly from the surrounding air without any turning by the negative pressure set in the common fluff separation chamber or flocculent separation device, so that at least one of the flocs or particles is sucked The separated ambient air is separated into a separation device or separation chamber.

  In order to further prepare the ambient air separated from the flint from the separation chamber, the negative pressure fluff separation chamber is connected in particular to the first fluid separation chamber or the fluid separation device, in particular the triacetin separation chamber, In particular, the fluff separation chamber and the fluid separation chamber are connected to each other by a single separation wall between the two chambers.

  Furthermore, it is contemplated that the fluid separation chamber or fluid separation device is connected to a second fluid separation device, in particular a demister or wire mesh, for further preparation of the aspirated and triacetin-containing ambient air. A higher cleaning rate of the ambient air sucked by the two-stage separation is achieved, and at the same time a greatly returned amount of triacetin is supplied to the triacetin reservoir, which is connected to the application device, for example as a spray nozzle or similar , Thereby the filter strip is acted on by triacetin.

  Furthermore, in a preferred configuration, it is contemplated that the suction connection pipe is formed so as to be movable in a lateral position with respect to the belt, so that it is possible to adjust the distance between two suction connection pipes, which are arranged particularly facing each other. Yes. A band with triacetin is passed between both suction connection pipes. In this case, the filter material band generated from the coating device and provided with triacetin is passed between the upper side and the lower side of the suction connection pipe on the predetermined transport plane in the coating section.

  Furthermore, an embodiment of the device is provided for a device, in particular the tobacco processing industry, in which the ambient air that has been sucked out and separated from the flocs, especially in the fluff separation chamber, is reduced around the fluid, in particular in the fluid separation chamber, by means of a blower. The ambient air that can be reduced or delivered to the periphery of the machine can be mixed with fresh air that can be delivered from a fresh air source, especially the ambient air that has been separated from the fluff and reduced especially around the fluid. The

  Furthermore, the object is to prepare a transported strip, in particular a filter tow strip, made of filter material from the tobacco processing industry along the transport section, where the liquid additive in particular by the coating device in the housing of the coating device. Is applied to the strip, and after application of the additive, in particular two drain openings from the periphery of the transported strip, in particular laterally, after the strip has flowed out of the coating device or from the housing of the coating device. At least one of the fluff or particles in the air around the belt is sucked out or removed from the periphery of the transported belt, and in particular at least the sucked fluff is separated in the fluff separation chamber Reproduced by one side.

  As a result, at least one of the cotton dust is sucked out at the application device or the outlet of the spray chamber, or the cotton dust sucked out from the periphery of the conveyed filter material band is separated from the sucked ambient air is performed. Furthermore, it is possible to reduce the ambient air contaminated by the triacetin as additive around the additive.

  For this reason, in the reproduction of this method, ambient air that is sucked out and separated from the fluff or reduced is supplied to the first fluid separation chamber or the fluid separation device, in particular the ambient air from the first fluid separation chamber. It is intended to be subsequently supplied to the second fluid separation chamber. Thereby, reliable regeneration of triacetin from the sucked air is achieved.

  Furthermore, in certain configurations, the suction of ambient air containing at least one of fluff or particles is connected to the machine after or during the start of the application process, in particular before or at the end of the application process, i.e. It is preferable when at least one of the shut-off is performed before the machine is stopped or when the machine is stopped.

  Further, since the band is acted upon by the blowing air in the range of the area for sucking out ambient air containing at least one of cotton dust or particles, the band is applied to the coating device by the blowing air arranged in the band conveying area. Preferably, the direction of the blowing air nozzle is adjusted so that the blown fluff is moved in the direction of the suction connection pipe or the suction opening.

  Moreover, a preferred reproduction of this method is that the ambient air that has been aspirated and separated from the flocs, especially reduced around the fluid, is handed over to the device with the applicator device, in particular around the machine in the tobacco processing industry or to the atmosphere, In particular, it is characterized in that the ambient air separated from the cotton dust and reduced especially around the fluid is mixed with fresh air prepared from a fresh air source.

  Moreover, the method is characterized in that the method is carried out using the device for preparing the filter strip. For this reason, it is clearly suggested in the above embodiment.

  Furthermore, this problem is solved by a machine in the tobacco processing industry, in particular a filter making machine, formed with the device according to the invention. In order to avoid repetition, the embodiments are likewise clearly suggested.

  Furthermore, other features of the invention will become apparent from the specification of the embodiments according to the invention together with the claims and the accompanying drawings. Embodiments according to the present invention may satisfy a single feature or a combination of features.

  The invention will now be described by way of example with reference to the drawings on the basis of examples without limitation of the general inventive idea, and is usually implied with respect to the disclosure of all the details according to the invention described in detail in the text ing.

1 schematically shows a preparation device according to the prior art. The top view in a coating device provided with the two suction connection pipes in the outflow area | region of a filter material belt from a coating device is shown roughly. Fig. 3 schematically shows a front view of the application device according to Fig. 2 in the outflow region of the filter strip. Fig. 4 schematically shows an arrangement for separating from ambient air sucked from the outflow region of the filter material strip to the coating device. Fig. 6 schematically shows another arrangement for separating from ambient air sucked from the outflow region of the filter material strip to the applicator. Fig. 4 schematically shows in cross-section another alternative arrangement according to the invention for preparing a filter strip with a coating device.

  In the next figure, each identical and similar element or corresponding member has the same reference number, so that no corresponding new introduction is made.

  According to FIG. 1, it has a preparatory device for a band consisting of a filter tow, for example cellulose acetate, drawn from valene with a main constituent group followed by associated fibers that pass continuously through the band 2; It includes a section 3, a front extending section 4, an extending section 6, a coating section 7, a lifting section 8 and a supply section 9. The supply section 9 is used to supply a strip portion to a filter continuous manufacturing machine 11 schematically illustrated, for example, a patent applicant type KDF2, KDF3 or KDF4 inflow device known to the tobacco processing industry.

  The discharge section 3 in which a filter material band drawn from valene (not shown) is conveyed has an enlarged nozzle 16 that obtains compressed air from a compressed air source. The compressed air is used to enlarge the conveyed filter tow cloth in this part. A controllable magnifying nozzle is described, for example, in U.S. Pat. No. 4,259,769.

  The filter tow band 2 via the turning thin plate 19 is, on the one hand, a forward extension section 4 formed by a roll pair 21 comprising rolls 22 and 23 and on the other hand a roll pair 24 comprising rolls 26 and 27 driven by a motor. To reach. The rolls 22 and 23 are pulled by the tow belt 2, that is, the rolls run more or less with zero resistance. When necessary, the rolls 22 and 23 are driven by a motor. The rolls can be pressed against each other with a controllable force in a manner known per se. In the front extending section 4 where the band portion is conveyed obliquely downward, the filter toe band 2 is extended in advance.

  An extended section 6 is connected to the roll pair 24, and the filter tow band 2 is conveyed from top to bottom vertically or by a vertical component. At the end of the extension section 6 there is another roll pair 39 with motor driven rolls 41, 42, the peripheral speed of which is approximately greater than the peripheral speed of the rolls 26, 27, so that the elastic filter tow 2 Is defined and extended. Thereby, the roll pairs 24 and 39 form the original stretching device. Rolls 26 and 42 each have a rigid grooved surface that contacts one bendable surface of either roll 27 or 42. This type of roll arrangement is known from the applicant's filter tow preparation devices AF2, AF3 and AF4, for example US Pat. No. 3,317,965 (Patent Document 6) and US Pat. No. 3,255,506 (Patent Document 7). )It is described in.

  Since another roll pair 43 is disposed rearward of the roll pair 39 and the peripheral speed thereof is slightly lower than the peripheral speed of the rolls 41 and 42, the tension of the filter tow 2 is easily relaxed by the conveyance. The roll pair 43 has a smooth rubber roll 44 in contact with the steel roll 46. As a result, the roll pairs 39 and 43 form a coating section 7 arranged almost horizontally in this case. In this coating section, the coating device 47 is arranged in the form of a spraying device or a spray nozzle, for example.

  The application device 47 sprays the filter tow material 2, for example, the filter tow belt 2 transported on one or both sides by fine droplets of a dissolving agent for triacetin.

  Since the expansion nozzles 18 are arranged in front of the coating device 47, the extended filter tow 2 is enlarged, and the solvent wets the large surface of the filter tow band 2. The expansion nozzle 18 and the expansion nozzles 16 and 17 supported in front of the roll pair 21 in the forward extending section 4 are acted on with compressed air.

  A scooping section 8 is disposed rearward in the coating section 7, and the filter tow band 2 is conveyed from the bottom to the top by the roll 53 driven by a motor mainly by a vertical component.

  The roll 53 has a supply section 9 disposed rearward. Furthermore, a so-called cork nozzle known per se exists in the supply section 9. The filter tow is supplied to the continuous filter manufacturing machine 11 after passing through the cork nozzle.

  Further details are clearly suggested in US Pat. No. 5,590,449.

  FIG. 2 schematically shows a top view of the applicator 47 with the housing 50, through which the band 2 is conveyed through the applicator 47 from right to left. In the coating device 47, the belt 2 is provided with triacetin as a liquid additive. As a result of the conveyance of the filter material belt 2, cotton dust that has absorbed triacetin is taken from the coating device 47 to the outflow side of the coating device 47. .

  Two suction connection pipes 61 and 62 are arranged on both sides of the filter material band 2 in the outflow region of the band 2 from the housing 50, and negative pressure is applied from the ventilation device (see FIG. 4a, reference numeral 82). Is done. In this case, the triacetin-containing cotton collected at the outlet or outflow gap of the housing 50 for the band 2 by the suction connection pipes 61 and 62 arranged in alignment with the outflow region of the band 2 at the outlet from the housing 50. Inhale or remove debris.

  FIG. 3 schematically shows a front view of a transverse section of the coating device 47 on the outflow side of the filter material strip 2. The suction connection pipes 61, 62 have suction openings 63, 64 on the suction side, and the suction opening surface normal is parallel to the transport plane of the filter material strip 2.

  As is clear from FIG. 3, the transport plane of the filter material strip 2 is perpendicular to the drawing plane. The suction connection pipes 61 and 62 are arranged at intervals that are wider than the filter material band 2 provided with triacetin.

  As shown in FIGS. 2 and 3, the lateral position of the suction connection pipes 61, 62 can be adjusted as indicated by appropriate arrows. Since the suction connection pipes 61 and 62 are arranged directly from the housing 50 in the outflow region of the filter material band 2, the fluff and particles that are entrained with the band 2 and exit the housing 50 are immediately sucked out of the housing 50. It is sucked out by the negative pressure contacting the connecting pipes 61 and 62 or removed from the periphery of the band 2.

  In FIG. 3, the cotton dust inhaled with triacetin is schematically indicated by reference numeral 65. The cotton dust 65 is inclined obliquely downward and straight, that is, the suction connection pipes 61 and 62 which are not bent are sucked into the cotton waste separation chamber (see FIGS. 4a and 4b, reference numeral 72).

  By arranging the suction connection pipes 61, 62 on both sides of the filter material band 2 coming out of the coating device 47, symmetrical suction of the cotton dust 65 from the periphery of the filter material band 2 is achieved. Is collected in the outflow gap (not shown here) of the strip 2 in the housing 50 and removed by the suction connection pipes 61, 62. In particular, the suction air conveyance path is from the inlet or from the inflow side of the two suction connection pipes 61 and 62 or from the outflow openings 63 and 64 (see FIGS. 4a and 4b, reference numeral 72) (see first). ) The same is true until the flow into the triacetin separation chamber (see FIGS. 4a, 4b, reference numeral 75). In this case, a negative pressure is set in the suction connection pipes 61 and 62 by a negative pressure source.

  In FIGS. 4a and 4b, an arrangement for separating cotton dust and triacetin is shown schematically, respectively, and the display of the suction connection pipe was not taken into account for ease of viewing. The arrangement of FIG. 4a or 4b has a passage space 71, in which suction connection pipes 61, 62 are particularly movably arranged. In this case, the passage space 71 is disposed below the filter material strip 2 (see FIG. 3). In this case, the passage space 71 is closed on the upper surface by a cover 69 (see FIGS. 2 and 3), and suction connection pipes 61 and 62 are arranged in the passage space 71. In FIGS. 4a and 4b, the display of the cover 69 and the suction connection pipes 61, 62 was not properly considered.

  The passage space 71 has a cotton dust separation chamber 72 inside, and the sucked cotton dust reaches the separation chamber via suction connection pipes 61 and 62. In the separation chamber 72, cotton dust that has been sucked or not sucked triacetin is separated, and ambient air from which cotton dust or particles have been removed by setting a negative pressure is supplied to the first fluid separation chamber 75.

  In this case, the passage space 71 has a separation wall 73 inside, and this separation wall has a hole 74, so that the ambient air from which the cotton dust has been removed passes through the hole 74 from the cotton dust separation chamber 72. The fluid separation chamber 75 is reached. Since the passage space 71 is formed in the passage 76 as a kind of drawer, the passage space 71 can be inserted or brought into the passage 76 partially or completely surrounding the passage space 71 arranged in the passage. In this case, the upper passage wall of the passage 76 forms a cover 69 (see FIGS. 2 and 3), and suction connection pipes 61 and 62 are arranged on this cover.

  In this case, the negative pressure is drawn from the suction side negative pressure source, and the negative pressure is schematically shown by the ventilator 81 in FIG. Therefore, cotton dust and particles are sucked into the passage space 71.

  In the fluid separation wall 75, triacetin is separated from the ambient air from which the cotton dust is removed in the first step. Subsequently, ambient air is guided to the second triacetin separation device or separation chamber 77 via the passage 76, and this separation device or separation chamber is formed with a wire mesh or demister 78. Triacetin is separated from ambient air a second time by the demister 78, and a fluid separation device 77 is connected to the ventilator 81 on the suction side.

  In FIG. 4a, a fluid separation device 77 is penetrated from the ambient air sucked in the longitudinal direction, and according to the embodiment shown in FIG. 4b, the fluid separation device 77 is arranged inclined with a predetermined gradient with respect to the normal. Therefore, the blocked triacetin is collected on the wall of the fluid separation device 77 and flows downward.

  According to the embodiment illustrated in FIGS. 4a and 4b, a multi-stage separation is performed, first separating the solid material into the form of cotton dust or triacetin, followed by a two-stage fluid separation. Done. Solid material separation or fluff separation is performed by reducing the flow velocity and additionally the air flow is diverted to an air separation device or air separation chamber 72 by appropriate flow guidance. In this case, the triacetin is separated from the sucked ambient air by, for example, the first fluid separation chamber 75 by turning separation or inertial separation having a cut shape. The triacetin obtained from the ambient air or the separated triacetin is subsequently returned to the appropriate storage tank for triacetin.

  FIG. 5 schematically shows a cross-section of an apparatus or arrangement that includes a coating device 47 and expands the filter tow band 2. In this case, the filter tow band 2 is conveyed to the application section 7 by the extended section 6.

  Suction devices 91 and 92 are arranged in or near the coating section 6, and air is drawn out particularly in the region of the roller pair in the section 6, and the dried dry tow fibers are removed by the suction devices 91 and 92. In this case, the air sucked in by the suction devices 91, 92, ie the ambient air, is permanently removed from the extended section 6 or from the periphery of the entire preparation device via the discharge conduit 94.

  After passing through the extending section 6, the filter tow band 2 is passed through the coating section 7 provided with the coating apparatus 47, and triacetin-containing cotton dust is sucked in by the suction device 85 schematically shown at the outlet of the coating apparatus 47, so that The triacetin-containing cotton dust floating on the filter tow band 2 is removed from the conveying area.

  In this case, the suction device 85 is connected to the blower 86 on the suction side via a coupling conduit 87. In particular, since the suction device 85 has a cotton dust separation chamber and separates cotton dust from the ambient air sucked from the outflow end of the coating device 47, the cotton dust separation chamber (see FIGS. 4a and 4b, reference numeral 72). The ambient air from which the fluff is removed after passing is sucked from the blower 86.

  Furthermore, in one configuration, the coupling conduit 87 between the suction device 85 and the blower 86 is provided with a fluid separation chamber (see FIGS. 4a, 4b, reference numeral 75), which contains triacetin and removes cotton dust. Triacetin is separated from the generated ambient air as a fluid.

  At the outflow end of the filter tow band 2 by the blower 86, the ambient air sucked out by the coating device 47 is removed of the cotton dust, and in some cases is reduced around the triacetin or the fluid. Fluff is removed by the blower 86 and possibly reduced ambient air around the triacetin is delivered via the supply conduit 88 to the periphery 90 of the apparatus for preparing the filter tow band 2 to the outlet opening 89. In this case, the normal atmospheric pressure dominates around the device or the preparation device 90.

  In addition, ambient air that has been dewed and optionally reduced around triacetin, drawn from and returned to the outflow side of the applicator 47 through the blower 86, and fresh air source Fresh air is mixed, for example, in the configuration of a ventilator 95, in particular an axial ventilator. In this case, since fresh air is sucked from the ventilator 95 and delivered to the supply pipe 88 for the ambient air from which the fluff is removed, the fresh air and the returned ambient air are returned to the periphery of the coating device at the outflow opening 89. It is handed over from the air to the surrounding atmosphere.

  All of the above features employed in the drawings alone, as well as the individual features disclosed in combination with other features, are considered essence of the present invention alone and in combination. Embodiments according to the present invention can be satisfied by individual features or combinations of features.

2. . . . . Obi 3. . . . . Discharge section 4. . . . . Pre-extended section 6. . . . . Extended section 7. . . . . Application section 8. . . . . 10. Raised section . . . Filter continuous production machine 16-18. . . Expansion nozzle 19. . . . Turning sheet 21. . . . Roll pair 22, 23. . . Roll 24. . . . Roll pair 26, 27. . . Roll 37. . . . Inflow slit 38. . . . Outflow slit 39. . . . Roll pair 41, 42. . . Roll 43. . . . Roll pair 44. . . . Rubber roll 46. . . . Steel roll 47. . . . Application roll 48. . . . Storage tank 50. . . . Housing 53. . . . Rolls 61, 62. . . Suction connection pipe 63, 64. . . Suction opening 65. . . . Cotton dust 69. . . . Cover 71. . . . Aisle space 72. . . . Cotton dust separation chamber 73. . . . Separation wall 74. . . . Hole 75. . . . Fluid separation chamber 76. . . . Passage 77. . . . Fluid separator 78. . . . Demister 81. . . . Ventilator 85. . . . Suction device 86. . . . Blower 87. . . . Coupling conduit 88. . . . Supply conduit 89. . . . Outflow opening 90. . . . Peripheral 91, 92. . . Suction device 94. . . . Discharge conduit 95. . . . Ventilator

Claims (14)

  One transported strip (2) from the filter material of the tobacco processing industry along the transport section for the strip (2), comprising a coating device (47) having a housing for applying the liquid additive to the strip (2) In particular, in an apparatus for preparing a filter tow band, at least one of the suction devices is disposed at the rear of the coating apparatus (47) and at least one of the outlet areas of the band (2) from the coating apparatus (47) with respect to the transport direction of the band (2). An apparatus characterized in that at least two suction openings of two suction openings or a plurality of suction devices are provided, and the belt (2) is transported or transported between them.   In at least one of the rear side of the coating device (47) and the exit region of the belt (2) from the coating device (47) with respect to the transport direction of the belt (2), a suction device having two suction openings is connected to the fluff separation chamber. Connected, the suction device comprises two suction openings, between which the strip (2) is transported or can be transported from the coating device (47). The superordinate concept of claim 1 or the apparatus of claim 1.   3. A device according to claim 1 or 2, characterized in that the suction openings of the suction device or the suction devices are aligned obliquely with the suction surface opposite to the transport direction of the strip (2).   One suction connection pipe (61, 62) with one formed suction opening (63, 64) is arranged beside the belt to be transported or transported, and the suction connection pipe (61, 62) 62) is aligned downward with the conveying section at least one of the laterally outward and belt (2) conveying planes, or the suction connection pipes (61, 62) are formed linearly or without bending. 4. The apparatus according to claim 1, wherein at least one of the following is performed.   5. The suction connection pipe (61, 62) communicates with the common fluff separation chamber (72) on the negative pressure side or is connected to the common fluff separation chamber (72). The device described.   The cotton waste separation chamber (72) on the negative pressure side is connected to the first fluid separation chamber (75), particularly the triacetin separation chamber (75), and the cotton waste separation chamber (72) and the fluid separation chamber (75) are separated from each other. 7) connected to each other by holes (74) in (73), wherein the fluid separation chamber (75) is connected to the second fluid separation device (77), in particular to the demister (78). The device described in 1.   The suction connection pipe (61, 62) is movably arranged at that position, so that the distance between the two suction connection pipes (61, 62) can be adjusted. The device according to item.   A device having an applicator device, particularly in the tobacco processing industry, where the ambient air that has been sucked off and dewed in the fluff separation chamber (72) and reduced in the fluid separation chamber (75) around the fluid is provided by a blower. Can be delivered on the pressure side to the periphery of the machine, or can be delivered, mixed with fresh air that can be removed from the fluff (65) and reduced around the fluid can be delivered from a fresh air source. An apparatus according to any one of claims 2 to 7, characterized in that   A transported strip (2) made of tobacco processing industry filter material along the transport section, in particular a filter tow strip, is prepared, here by means of a coating device (47) in a housing (50) of the coating device (47) In the method in which the liquid additive is applied to the belt (2), the belt (2) transported after the additive is applied, from the coating device (47) or after flowing out of the belt (2) from the housing of the coating device. Around the belt (2) from which the cotton dust (65) or particles in the air around the belt are sucked out or conveyed through the two suction openings (63, 64) horizontally The process is characterized in that at least one of removal of the flocs (65) removed and sucked out of the flocs is separated in the fluff separation chamber (72).   The ambient air that has been sucked out and from which the cotton dust (65) has been removed is supplied to the first fluid separation chamber (75), and the ambient air from the first fluid separation chamber (75) continues to the second fluid separation chamber (77). The method according to claim 9, wherein the method is provided.   The suction of ambient air containing fluff (65) and particles is connected to the machine after or during the start of the coating process, or before or at the end of the coating process, ie before or after the machine is stopped. Or the belt (2) is acted upon by blowing air in the area of the working area of the suction of ambient air containing at least one of the fluff (65) or particles, or at least one of them The method according to claim 9 or 10, wherein the method is performed.   Ambient air that has been aspirated to remove flocs (65) and reduced around the fluid is handed over to devices having a coating device, particularly machines in the tobacco processing industry, to remove flocs (65) and fluids 12. A method according to any one of claims 9 to 11, wherein the ambient air reduced around is mixed with fresh air prepared from a fresh air source.   13. A method according to any one of claims 9 to 12, characterized in that the method is carried out using the device according to any one of claims 1 to 8.   A machine in the tobacco processing industry, in particular a continuous filter production machine, comprising an apparatus according to any one of the preceding claims.