DE1761500A1 - Rolling paper and process for its manufacture - Google Patents

Description

Joseph SAINT-PASTOU MARSEILLE / France

Cigarette paper and process for its production The invention relates to a cigarette paper with a perforated grid made of an incombustible material, which holds the ashes after the tobacco and the paper pulp are burned.

Such cigarette papers are known, the paper having an inner Reinforcement made from a non-flammable material, for example from asbestos or metal, which is in the form of a lattice and is left behind when the tobacco and pulp is burned, so that the Ash is held by this. However, such an implementation is proportionate expensive and difficult to manufacture.

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It is also known to print a grid made of an incombustible material, for example silicone resin, on cigarette paper. Of the The disadvantage of this embodiment is that, on the one hand, the holes in the grid are too small to ensure proper pulling, and on the other hand, the entire grid is too weak to have sufficient mechanical resistance.

The present invention is to avoid the aforementioned Kachteile and creating a rolling paper that is simple and cheap to manufacture and certainly those mentioned above Effects achieved.

Am such cigarette paper with an openwork grid. an incombustible substance, which holds the ashes after combustion of tobacco and the paper pulp, is characterized according to the invention in that the grid is slightly embossed and the crossed points are reinforced to stiffen the grid.

This grid can consist of two rows at right angles to one another arranged, parallel stripes are made up »which are straight or wavy, can be continuous or interrupted.

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The invention also relates to a method for producing such a method Cigarette paper, which according to a further feature of the invention is characterized in that the grid consists of an incombustible Material is applied by means of at least one application or embossing roller, which receives this material from a storage container and pinching the paper between itself and a soft platen and conveying virus.

Here, embossing rollers are expediently used, which either have a relief emerging from the roller surface or embedded in the roller surface.

It is also particularly advantageous if two embossing rollers are used of which one the longitudinal rows and the other the transverse rows of the grid. These two embossing rollers can either come from the same side of the paper or from different sides of the paper act.

It has also proven to be useful to use one when drying to apply astringent material and to dry the paper after leaving the embossing rollers, causing the applied material to run in the paper pulp is prevented.

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After processing the cigarette paper according to the invention The edge of a finished cigarette is bent inwards at the end to be lit to prevent the ashes from falling forward. To avoid damaging the applied grid when bending this edge, the cigarette paper can be impregnated with a plasticizer at this point.

On the long edges of the cigarette paper «which are usually marked with * are glued to each other, the grid is superimposed with doubling, whereby the effect described below is achieved.

In the attached drawings, some practical embodiments of the invention are shown, which show:

Figure 1: a schematic representation of a production possibility, Figure 2: another manufacturing option, FIG. 3: a view in the direction of arrow A according to FIG. 2, Figure 4: the same view of a third embodiment, FIG. 5: an enlarged plan view of the cigarette paper, Figure 5a: a section along the line Va-Va, FIG. 6: the same plan view of a different design,

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FIG. 6a: a section along the line VIa-VIa according to FIG. 6, figures

7 and 7a: a perspective view and a section through a Cylindrical shape of the cigarette paper when producing a cigarette and

FIG. 8: a cigarette with the cigarette paper according to the invention in a schematic representation.

An incombustible material, which for the production of the invention Cigarette paper is applied to this, for example, have the following composition:

35-40% of an incombustible substance, e.g. sodium silicate, 30-35% of a substance to regulate and delay combustion,

e.g. talc, finely ground mica or calcium carbonate, 5-10% of a plasticizer, acacia gum or paraffin, which has previously been treated with glucose to dull the alkalinity of the silicate became,

5-10% of a dye, e.g. titanium white and 5-10% of a solvent, e.g. deionized water.

Flavorings, other colorings or other suitable substances can also be used for this purpose Additives are given.

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In the embodiment according to FIG. 1, the incombustible substance is poured into a container 1, the level of which is kept constant by means known per se and not shown. Also is an agitator provided to this mixture continuously to maintain homogeneous.

The mixture of substances is taken up by an immersing roller 2, with the excess mass taken up being removed by the stripping roller -3. The roller 2 transfers the picked up mass to the embossing roller 4, which in the illustrated embodiment has a number of axially directed strips. These strips are arranged such that they generate on the cigarette paper strip of about 0, 5 mm in width at a distance of 3mm. As practical tests have shown, these dimensions have a maximum effect in terms of a good draw of the cigarette produced with them and a sufficient rigidity and resistance.

The paper 5 passes between this embossing roller 4 and a pressure roller 6, the pressure of which is adjustable, whereby the paper is embossed in accordance with the profiles of the roller 4. A running of the composition applied to prevent in the paper, owing to its capillary action, the paper is dried after leaving the rollers 7 by suitable means, for example by means of infrared rays. ; "■,

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The paper then passes a second embossing device, which is from the first only differs in that the profiles on the profile roller 4 'are at right angles to the profiles of the first roller, i.e. in the direction of movement of the paper are arranged. This procedure of double treatment of the paper has the beneficial effect that the Grid of the applied fabric at the crossing points by doubling is reinforced, whereby a stiffening of the entire grid is achieved.

In the embodiment according to FIGS. 2 and 3, the one to be applied is located Mass in the storage container 8 and is taken up therefrom directly by embossing rollers 9 and 9 '. A doctor blade 10 touches too much absorbed substance. The paper 11 is also here again after the passage between the embossing roller 9 and the pressure roller 12 dried by a heater 13. The paper then passes the second roller arrangement with the embossing roller 9 ', on which the profiles are softer are also arranged again in the direction of movement of the cigarette paper.

The profiles of the two embossing rollers 9 and 9 'can be straight be or also corrugated, it is also possible to use these profiles to be carried out either continuously or intermittently. Another ex

guidance option is to use an embossing roller with corrugated profi

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len to equip, as shown in Figure 3, and the other embossing roller with straight profiles.

With both options it is still possible to use the Both rows of the grid are to be applied either from the same side of the paper or each row on a different side of the paper. The advantage Treating the paper in two stages is that the Paper can expand into the profiles, making the grid more solid and becomes more durable.

The embodiment according to FIG. 4 differs from the previous ones in that the grid can be accessed in a single operation Cigarette paper is applied using a 9 "embossing roller which has a profile from both rows of a grid to be applied. In order to maintain a grid, its intersection points are sufficiently reinforced, this embossing roller 9 ″ has deeper recesses at the intersection points 14, so that a Cigarette paper has a greater material thickness at the intersection points 14, as can be seen in FIGS. 5 and 5a.

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Figures 6 and 6a show a paper which was produced in connection with the figures and Z embodiment option 3 described after. This paper shows only small accumulations of material, which arise when the material is compressed. However, these are reduced when the paper is later rolled out during the manufacture of the cigarette.

Here, a cylinder is formed from the cigarette paper in such a way that that the long edges of the cigarette paper to be glued together overlap, so that the grid is superimposed along this edge, as can be seen in FIGS. 7 and 7a. In this way the advantage is achieved that while the cigarette is burning, the grids lying one on top of the other are welded to one another one after the other and a completely closed cylindrical shape of the grid is created.

FIG. 8 shows a schematic representation of a partially burnt down Cigarette, only the grid being present in the area 15. In the area 16, the tobacco and the paper pulp are already burned and the ashes are held in place by the grid. In the area 17 of the cigarette, it has not yet burned down.

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As already mentioned, to prevent the Ashes from the cylindrical grid are bent over the edge of the cigarette paper at the end to be lit inwards after this is impregnated with a plasticizer, e.g. starch.

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Claims (10)

PATENT CLAIMS 1. Cigarette paper with an openwork grid made of an incombustible Substance that holds the ashes after the tobacco and paper pulp are burned, characterized in that the grid is light is embossed and the crossing points (14) are reinforced for stiffening. 2. Cigarette paper according to claim 1, characterized in that the The grid consists of two rows of parallel strips arranged at right angles to each other, straight or wavy, continuous or interrupted could be. 3. A method for the production of cigarette paper according to claim 1 and 2, characterized in that the grid made of an incombustible material is applied by means of at least one application or embossing roller (4; 9; 9 '; 9 ") which takes this substance from a storage container (1; 8) and the paper (5; ll) between itself and a soft, adjustable Pressure roller (6; 12) jammed and transported on. 4. The method according to claim 3, characterized in that embossing rollers (4; 9; 9 '; 9 ") can be used with raised or recessed relief. 109882 / 0A68 5. The method according to claim 3 and 4, characterized in that two embossing rollers (4,4 '; 9, 9 ¹ ) are used, one of which embosses the longitudinal rows and the other the transverse rows of the grid. 6. The method according to claim 5, characterized in that the two embossing rollers act from the same or from different sides of the paper. 7. The method according to claim 3 to 6, characterized in that a Applied fabric that contracts when it dries and the paper is dried after leaving the embossing rollers. 8. cigarette with a cigarette paper according to claim 1 and 2, which is produced according to the method according to claims 3 to 7, characterized in that the edge of the cigarette paper is bent inwards at the end to be lit. 9. Cigarette according to claim 8, characterized in that the bent edge is impregnated with a plasticizer. 10. Cigarette according to claim 8, characterized in that the Grid aryÖen glued together long edges of the cigarette paper superimposed. 109882/0468 / 3 Blank page