DE1782354A1 - Filters for cigarettes or the like. as well as method and apparatus for producing the same - Google Patents

Description

as well as method and apparatus for production

The invention relates to the manufacture of filters for cigarettes or the like. Smoking objects and in particular to the Manufacture of filters with small filter material, d. H. Material consisting of particles that can be of various sizes within a range from fine dust-like particles to relatively large, whose diameter is approximately 1 mn. Of the The term "cigarette" here includes cigars and other smoking objects.

Lately, nan has increased the value of small-scale material for filtering smoke to remove unwanted substances from it. The same materials are used in the Filters of a cigarette enclosed, generally in a space between two stoppers of the usual type smoke-permeable filter material. In order to ensure the effectiveness of the filter, it is necessary that the small-sized Material fills the space between the plugs in such a way that smoke drawn through the filter passes through the material must flow, i.e. it is necessary that the material completely fills the space between the filter plugs and not an empty space, through a ^ n the smoke am Filter material can be trimmed. With a modern process.

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BATH

a continuous web is used to manufacture such filters made of wrapping paper folded into a trough shape and stoppers made of porous filter material are spaced along the so shaped web arranged, with portions of fine filter material in the spaces between the stoppers are inserted and then the paper wrapper is wrapped around and closed around the stopper and filter material, to form a continuous strand which is then divided into required lengths through the plugs. In performing this procedure, it is difficult to get enough particulate matter into the spaces between the plugs in order to ensure that in the filters produced in this way the smoke can flow past the filter material without that at the same time the material reaches places where it is undesirable, e.g. between the stoppers and the Wrapping paper.

The object of the invention is to provide a method for Manufacture of filters for cigarettes and the like to create smoking articles, which is particularly suitable for Manufacture of filters with fine filter material.

According to the invention, a method for producing cigarette filter rods is created which is smoke-permeable Stopper and quantities of fine filter material alternately along the length of the strand piece, and this one Method comprises the following steps: placing plugs

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on a wrapping strip at a distance from one another, the plugs of larger cross-section and lower density are as required in the finished product, shaping the strip with the surfaces of the plugs in a trough shape, feeding small filter material in the trough-shaped strips and between the stoppers, folding the trough-shaped strip into a tube around the stoppers, so that small-sized Enclose filter material and compress the plugs to the desired cross-sectional size and density.

Preferably, the plugs are squeezed together while the strip is being folded over, and preferably after the method a continuous filter rod produced.

According to the invention, an apparatus for producing cigarette filter rods is provided which is smoke-permeable Contain plugs and quantities of fine filter material, which are arranged alternately along the length of each strand and the device comprises means for placing plugs on a single strip at a distance from one another, but the stoppers are larger. Cross-section and lesser Density are than what is required in the final product, as well as a means of forming the strip with the surfaces the plug in a trough shape, means for feeding fine filter material into the trough-shaped wrapping strip and between the stoppers, means for folding the trough-shaped strip into a tube around the stoppers, around the small-part Include filter material, and means for combining

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press the stopper to the desired cross-section size and density. The means for compressing the plugs preferably have a bed of fittings and a tape of fittings the strip along the bed in a trough "which is designed so that it attaches the tape to a part in the same shape as the trough-shaped single strip brings, and on another part with the strand to be produced, the shape between these two parts becomes increasingly narrow, and preferably the means for folding the trough-shaped strip into a tube are arranged so that that they act on the strip when it moves from one part to the other of the set.

The invention also extends to filter plugs and cigarettes, which are produced by the method described above, the device for carrying out the method and also to the process of making filter cigarettes according to the method.

An embodiment of the invention is described with reference to the drawings, namely show:

FIG. 1 shows a sectional view of part of an apparatus for producing filter cigarettes, and

Figures 2 to 8 sections along the lines IL-II to .VIII-VIII in Figure 1.

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As can be seen from the drawings, the device shown corresponds essentially to a part of that disclosed in German patent specification (P 14 32 720.9), and has a set in which a set band 1 carries a web of wrapping paper through successive guides and under a Granulateinführrad 3. the garniture tape 1 is an endless belt transversely to its width is flexible and runs through a set bed 4, the shape of which progressively changes along its length in the embodiment shown in figures 2 to S way. Fastened to the bed set 4 are a number of guides 5 »6 and 7», the respective shapes of which can be seen in FIGS. 2 to 8, in order to limit the necessary cross-sectional shapes together with the bed. At the upstream end of the set 4, filter plugs 8 of twice the length required in the cigarettes are inserted under a guide 9 by means of an endless belt 10. The filter plugs 8 are larger in cross-section and less dense than necessary, so that they can ultimately be compressed on the cross-section size and the density that is required in the cigarettes. Between the guides 5 and above the clothing bed 4 there is arranged a granulate introduction wheel 3, which is provided around its peripheral edge with a series of pockets 11 which serve to collect measured amounts of granular FiltexT.ialeriai 12 from a storage container arranged above the wheel 3, the not dargeotelLt lot to insert into the spaces between the plugs H. Guides 13 extend around the wheel 3 to hold the granular material in the pockets.

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Downstream of the granule introduction wheel 3 is a horizontal one arranged rotating disc 14 which applies glue to an upstanding edge of the paper web 2 to enable that it sticks to the other edge of the web after it is folded down. Another guide 15 supports the web 2, while the adhesive is being applied.

When the paper web 2 in the clothing bed 4 on the Gamiturband 1 is carried, the plugs 8 are arranged in their places in the middle B of the conveyor belt 10, while the guides 5 deform the clothing tape 1 and the paper web 2 from the shape shown in Figure 2 to the shape shown in Figure 3, in which the plugs 8 are already slightly compressed, so that they have a slightly flattened underside and a flattened one Have sides. This will reduce the width of the plugs to no less than their final diameter (i.e. the one which you will have after the final compression to the required size), but does not reduce yours The high, and the flattened sides of the plugs are in sealing contact with the paper web for a substantial amount of time Part of their height. This is more clearly evident from Figure 4-, the shows the plane bi3 at which the material is introduced into the spaces from the granulate feed wheel 3, this determining the height is due to the height above which the plugs 8 do not rest firmly against the paper web 2, since any material "that would be filled beyond this height, can easily be caught between the stopper and the paper web 2, where its Presence is undesirable. After the spaces between the plugs 8 are filled with material 12, the move

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Garment tape 1 and the paper web 2 under the guide 6, which continues the folding of the paper web 2 around the stopper and around the filter material and which compresses the stopper 8 to their final cross-sectional size. In one example, the original size of the plugs is 8 27 mm in circumference and this is compressed to about 24. "5 mm. The compression of different sizes The stuffing would be done in proportion to their size. As usual, an edge of the paper web 2 is allowed to stand up for the purpose GuEmierung between the disc 14 and the guide 15 'before this edge is turned over by the combined effect of guides 6 and 7, which further compress the strand and shape it, which is now shaped into a circular cross-section. The following device, not shown cut the strand formed in this way through the middle of every second stopper, so that you get double-length filter plugs received, which are then combined at each end with a piece of cigarette rod and cut once more to make two filter cigarettes.

It has been found that filters formed by this process pack the granular material well and that the spaces between the plugs are well filled to produce a generally satisfactory filter which subjects the sucked smoke to the filtering effect of the granular material.

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Claims (8)

Claims 1. Process for producing τοη filter rods that smoke permeable Alternate plugging and quantities of small-sized material Included along the length of the strand, characterized by the following steps: placing plugs on a wrapping strip with spaces between each other, the plugs of larger cross-section and smaller Density are as required in the finished product, forming the strip with the surfaces of the stoppers in a trough shape, feeding Wipe small pieces of material into the trough-shaped strips the stopper, folding over the trough-shaped strip in Hohrgeetalt around the stopper for the purpose of encasing the fine filter material, and compressing the stopper to the desired position Cross-section size and density. 2. The method according to claim 1, characterized in that "that the Plugs are squeezed while the strip is unlaid. 3. Application of a method according to claim 1 or 2 «to manufacture of a continuous filter line. 4. Process for the manufacture of filter cigarettes, characterized by applying the methods of any one of claims 1 to 3 to making filters for cigarettes. 109833/0833 «* 3 ^pECTED 5. Device for dividing cigarette filters with smoke-permeable stopper and quantities of small pieces Filter material alternating along the length of a strand, characterized by means for placing plugs on it a wrapping strip at intervals, the plugs being of larger cross-section and lower density than these in the finished product are required by means of strips and surfaces of the plugs in a trough shape to form, means for feeding particulate material in the trough-shaped covering strelfen and between the Plug, means for folding the trough-shaped strip in tubular form around the plug, around the small-sized material and means for compressing the plugs to the desired cross-sectional size and density. 6. The device according to claim 5, characterized in that the means for compressing the stopper comprise a bed of clothing and a belt of clothing to move the strip along the bed in a trough which corresponds at one part to the belt with the trough-shaped wrapping strip and at one the other ¹ HeJLl matches the strand to be produced, and that ■ »
has an increasing narrowness between these parts. 7. Apparatus according to claim 6, characterized in that the die Means for folding the trough-shaped strip into a tubular shape act on the strip as it moves from one part of the set to the other. 109833/0833 8. Use of a device according to one of claims 5 to 7 for producing a continuous filter rod. 109833/0833