JPS58162283A - Filter rod producing method and apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION A method for manufacturing a filter rod, in which the filter rod is wrapped with a resistive coating material and the filter rod thus formed is then cut into filter rods.

Furthermore, the present invention provides a feeding device for continuously feeding a filter material, a feeding device for continuously feeding a coating material tape having high air resistance, and a feeding device for continuously feeding a filter material with a coating material tape. The present invention relates to an apparatus for making filter rods, which is equipped with a coating apparatus for coating the filter rods and a cutting apparatus for sequentially cutting the filter rods.

To make so-called ventilated filter cigarettes, through which secondary air can flow into the cigarette or into the mouthpiece, holes are formed in the finished cigarette (usually by piercing or burning) in the area of the filter. Alternatively, a pre-perforated bonding paper is used to bond the filter plug and cigarette to each other. In this case, of course, the surface of the filter plug must be porous.

The problem underlying the invention is to pre-treat the filter rod during its manufacture in a continuous manner for two purposes.

The solution according to the invention to the above-mentioned problem consists in forming holes in the coating material to reduce air resistance before cutting the filter rod.

A feature of an apparatus particularly suitable for carrying out the above-described method according to the invention is that it is provided with a perforation device for forming holes in the dressing tape in the working flow of the cutting device.

Other configurations of the present invention are described in claims 2 to 11 and 13 to 22.

The invention will be explained in more detail below with reference to embodiments illustrated in the accompanying drawings.

The machine of FIG. 1, known in the cigarette processing industry under the name KDF, produces two main structural groups: a preparation device 1 for the fiber tow, which is fed as an endless continuous body, and a coated filter rod. It consists of a processing device 2 for

The main structural group 1 comprises a pair of rolls 3 for continuously drawing an endless series of fiber tows 4 from a bale 6. Before the fiber tow continuous body 4 reaches the roll pair 6, it passes through two air nozzles 7 and 8, by which its tissue is relaxed. Following the roll pair 3, two other roll pairs 9 and 11 are provided, between which a softener 13 is spread between the roll pairs 9 and 11 and the fibers to be guided. A spray device 12 is present for sprinkling the tow continuous body 4 . Each one of the single rolls constituting roll pairs 9 and 11 is provided with grooves on its circumferential surface, while the counter roll of these rolls has a smooth surface made of an elastic material. . All roll pairs 6.9 and 11 are driven by the main drive motor 4. In this case, the number of rotations of roll vs. B is 9 vs. roll
The speed of rotation is also low and variable via a transmission 16, the reduction of which is varied by a controllable adjusting motor 17. The spray device consists of a container 18 for containing the softener liquid 13.

A take-off roll 21 driven by a drive motor 19 is immersed in the softener liquid. The rotating brushed roll 22 continuously takes the softening agent from the circumferential surface of the take-out roll 210, and sprinkles this softening agent on the threads of the fiber tow continuous body 4 that is being spread and guided between the roll pairs 9 and 11. .

The fiber tow continuum 4, conditioned and sprinkled with softening agent, reaches from the structure group 1 into the inlet hopper 23 of the structure group 2, in which the fiber tow continuum 4 is combined into one continuum; It is continuously drawn off from the bobbin 24 and placed by a gluing device 26 onto a glued covering material tape 27 . The covering material tape 27 and the fiber tow continuum reach two days above the conveyor belt. This conveyor belt guides these two elements through a sizing device 29, which continuously wraps the coating material web 27 around the circumference of the fiber tow web, the endless filter web 51 form. The filter rod passes through a seam-forming plate 32 in which the adhesive seam is dried.

Individual filter rods 34 are subsequently cut off from this filter rod 51 one after another by means of a cutting device 33 and transferred by means of an accelerating device 36 into a support drum 67 . In this support drum, the filter rod is transferred from the feed direction along its longitudinal axis to the feed direction along its transverse axis and is conveyed onto the support belt 68 to the next processing stage.

A covering material tape 27, usually made of paper with a relatively high air resistance, is drawn off from the bobbin 24 by a pair of driven rolls 41, guided past a perforation device 42 and glued by another pair of driven rolls 43. is sent to device 26.

A turning roll 44 is further provided in the feeding path of the covering material tape 27.
~49 are provided.

The drilling device 42 serves to drill holes 51 in the covering material 27 as schematically illustrated in FIG.

Each hole is square in shape. The holes are in rows a, 1), and C.
, d, e, and f are formed in a direction transverse to the feeding direction F,
It will later be present in the filter cigarette during subsequent processing. The coating material tape is wrapped around the filter material 4 in the sizing device 29 as described above, and once applied and formed into a cylindrical filter string 31, the rows a.
... Holes 5 formed side by side with each other at f
1 are arranged in an annular manner around the circumferential surface of the filter material. The filter rods 64 cut by the cutting device 66, of which only one U is shown in FIG. 3, have a working length that is, for example, six times longer. This is achieved by cutting the filter rod along cutting lines 54 and 54B in a known subsequent filter mounting machine (of the Applicant's MAX type), thereby reducing the This means that the plugs 34a, 34b, 54c are cut to the length used.

Next, the filter rod is replaced with two plugs 3 in Figure 4.
As shown as 4a, each is inserted between two outer cigarettes Z. Glued paper strips - often referred to as laner paper or binder paper - are present in cigarettes Z and between these cigarettes.
The above-mentioned piece of paper is attached to the group consisting of the main filter plug 34a so as to cover the filter plug and the beginning end of the cigarette Z on the mouthpiece side. In the area where the perforations 51 of the double working length filter plug 54a are present, the liner paper is likewise provided with a break provided in two spools or rows va, vb. Of course, no glue is adhered to this area of the spool. The break in the spools va and vb is created by an electrical discharge spark (spark perforation) on the paper section V. These breaks can also be created in other ways, for example using laser light.

After the paper strips V have been applied, the group is rolled in a manner known per se in a transfer line (not shown) and is thus prepared into two filter cigarettes. Next, the cutting line 34c
Two finished filter cigarettes (FIG. 5) are obtained, each with an annular ventilation area va or vb. The feeding and subsequent rolling of cigarettes and filter plugs and liner paper tape in a transfer line is described in US Pat. No. 5,527
．． MAX, which is known in the cigarette processing industry in No. 254.
A cross section of a type filter mounting machine is shown.

The invention can also be practiced with filter rods of four times or twice the working length.

The holes 51 are punched out by the punching device 42 according to the invention as circular, oogenic or square breaks. At this time, a large number of rows of holes are formed that are continuous in the transverse direction with respect to the feeding direction of the covering material tape 27 and are parallel to each other and will later become cigarettes.

According to another embodiment of the invention, the holes 51 extend up to the edge region of the coating material tape 27 which is superimposed in the sizing device 29 and applied to form the filter string 31. Advantageously, there are no holes in the area of this adhesive seam.

When processing acetate fibers as a conventional filter material, the coating material tape 27 is provided with one or more glue films on its later inner surface, which are continuous in the longitudinal direction of the coating material tape, thereby forming a filter material. is combined with the covering material tape. According to another embodiment of the invention, the application of the glue by the gluing roller or the gluing nozzle is periodically interrupted in the area of the hole row.

The perforation device 42 according to the invention is advantageously designed as a punching device. In this case, a male roll with a row of protruding punching tools is used, the size and shape of which correspond to the size and shape of the desired holes on the coating material tape. The distance between the rows in the circumferential direction of the tool roll corresponds to the distance between the rows of holes in the longitudinal direction of the coating material tape 27.

A female roll with corresponding recesses is provided as the counter tool. However, metal belts with corresponding breaks introduced by protruding punching tools can also be used. In this case, punching takes place at the same time. Since the punching force is relatively small and the hole diameter is relatively short, it is also possible to form the other roll as a smooth roll with a flexible surface and press a punching tool against this roll to perform punching at that time. It is possible.

The stamped coating material is removed by brushing or by suction or blowing air.

Even if holes are formed in the covering material tape 27 by piercing or cutting, the air resistance of the covering material tape 27 will increase the spools ya and vb of the paper strips during the production of filter cigarettes.
It grows within the area bordering the area.

Another method for producing holes according to the invention is to:
For example, grinding or milling is also possible. In this case, the coating material is thinned or removed altogether to reduce air resistance. At this time, the covering material tape 27
are guided in the drilling device 42 via a number of protruding support surfaces corresponding to the desired number and dimensions of the holes and corresponding dimensions. Material is then removed from the coating material tape at the location of the desired holes with a grinding or milling tool guided closely along the support surfaces, depending on the number and shape of the support surfaces.

Also, energy-rich light beams, especially laser beams or polar gaps can be used to form the holes. A configuration for perforating tape-like strips in the cigarette processing industry is described in US Pat. No. 4,240,448.

The invention is not limited to the formation of aperture shapes according to the illustrated embodiments. Other suitable shapes of perforations are also possible.

Within the scope of the invention, it is also possible to form the holes in the circumferential surface of the filter rod 31 after the final formation of the filter rod 31 has been completed. In this case, the perforation device is provided between the seam forming plate 32 and the cutting device 53. This drilling device is equipped with a number of rotating punching tools, needles, milling tools, etc., which are distributed around the circumference of the continuous body. It is advantageous to guide the punching tools or needles so that when they act on the rod they have the rod speed or a speed slightly different from this speed. A rotating tool only needs to fundamentally reciprocate. Laser devices serving as perforation devices distributed around the periphery may also send light beams in a pulsed manner. The individual energy-rich beams can be diverted with beam splitters and mirrors, thus eliminating the need for a separate laser device for each (mostly longitudinal) hole spool. It is also possible to use very fine water jets under very high pressure to drill holes. This is because the impinging water actually evaporates immediately, leaving no trace of moisture behind.

In FIG. 6, the coating material tape 27 drawn off from the roll pair 41 is guided around the circumferential surface of a driven roll 62 which is provided with grooves 61. In FIG. A square ridge 65 is connected within the groove 61 . These ridges are provided on rolls 64 that are driven synchronously in opposite directions. Covering material tape 2
7 , the material is cut out in the area of the ridge 66 by a driven high-speed single-turn milling roll 66 .

Square holes 51 are thus formed in the covering material tape 27 (in rows a, b shown in FIG. 7).

The cut material reaches into the conduit 67 and is sucked off. The perforated coating material tape is then fed in pairs of 45 rolls. There are no holes in the seam area 27a (FIG. 7) of the covering tape 27, where the gluing device 26 applies a continuous film of glue to close the seam.

The so-called internal gluing for the connection of the covering material tape 27 and the fiber tow continuous body increases the tear strength of the tape and reduces the risk of clogging with glue of the holes 51 in the area of the hole rows a, b. It will be interrupted because of this. However, it is also possible to deposit the glue on the covering material tape 27 between the holes 51 for internal gluing.

[Brief explanation of the drawing]

1 shows a machine for making filter rods by a continuous method, FIG. 2 shows an enlarged view of a perforated coating material tape according to the invention, and FIG. Figure 4 shows a pre-perforated bonding paper for attaching a double length filter plug to two cigarettes; Figure 5 shows a filter rod made using a filter plug made in accordance with the present invention. Two finished cigarettes; FIG. 6 is a side view of the device for punching square holes in the filter coating tape; FIG. 7 is a plan view of the coating tape punched with the device according to FIG. 6; figure. The symbols in the figure are 27... Covering material tape 42... Punching device 51... Holes

Claims (1)

[Claims] t. A method for manufacturing a filter rod, in which a filter material is continuously wrapped with a coating material having high air resistance, and then the filter continuous body thus formed is sequentially cut into filter rods, comprising: A method as described above, characterized in that, before cutting the filter rod, holes are formed in the coating material to reduce air resistance. 2. The method according to claim 1, wherein the holes are formed in the coating material in parallel to each other transversely to the feed direction of the filter rod. i. According to claim 1 or 2, the holes are formed in a ring shape on the finished filter continuous body and are arranged in a row perpendicular to the feeding direction of the filter continuous body. Method described. 7. A method as claimed in any one of claims 1 to 6, in which holes are formed on the coating material tape. 5. The method according to any one of claims 1 to 4, wherein the pores are mechanically formed in the coating material. 6. The method according to any one of claims 1 to 5, wherein holes are formed in the coating material by cutting or piercing the holes. 6. A method as claimed in claim 5, in which the Z-holes are formed in the coating material by punching out breaks. 8. The method of claim 5, wherein the holes are formed by grinding or milling the coating material. 9. The method of claim 8, wherein the coating material is thinned to increase air permeability at the location of the hole formation. 10. The pores are formed in the coating material with an energy-rich light beam, in particular a laser beam, according to claims 1 to 4.
The method described in any one of the preceding paragraphs. 1t axially relative to the cutting position such that the hole is located in the region with a glued connection part when fitting the filter rod or a filter plug formed by splitting the filter rod during subsequent processing. The method according to any one of items 1 to 10, in which the holes are formed at intervals of . 12. A feeding device for continuously feeding the filter material, a feeding device for continuously feeding the coating material tape with high air resistance, and a feeding device for continuously feeding the filter material with the coating material tape. In the apparatus for making filter rods, the apparatus comprises a coating apparatus for cutting the filter rods and a cutting apparatus for sequentially cutting the filter rods.
1), characterized in that a perforation device (42) is provided for forming the device. 13. Device according to claim 12, characterized in that a perforation device is provided which forms the holes transversely to the feed direction of the filter rod (31) and parallel to each other. 14. Claim 12, wherein a perforation device is provided for forming holes on the finished filter continuous body so that the holes are arranged in an annular manner and perpendicularly to the feeding direction (b). 16. The device according to item 1 or 15. 15. Device according to any one of claims 12 to 14, characterized in that it is provided with a perforation device for forming holes in the covering material tape (27). 16. Device according to any one of claims 12 to 15, characterized in that it is provided with a drilling device for mechanically forming holes in the coating material. 1Z Device according to claim 16, characterized in that it is provided with a perforation device for forming holes in the coating material by cutting or piercing. 1B, the first claim is provided with a punching device for forming holes in the coating material by punching out the breaks;
The device according to item 6. 19. The device according to claim 16, further comprising a drilling device for forming the holes by grinding or milling the coating material. 20. Device according to claim 19, characterized in that it is provided with a perforation device which only thins (weakens) the coating material by grinding or milling. 21. Device according to any one of claims 1 to 20, characterized in that it is provided with a drilling device for forming holes in the coating material with energy-rich light, in particular laser light. 22 When installing a filter rod or a filter plug formed by dividing the filter rod in subsequent processing, the hole is axially relative to the cutting position that exists in the region with the glued connection part. 22. Device according to any one of claims 1 to 21, characterized in that it is provided with a drilling device for forming holes at intervals.