IT202000014047A1 - EMBOSSING SYSTEM AND PRODUCT OBTAINED WITH THIS SYSTEM - Google Patents

Description

DESCRIPTION of the industrial invention entitled:

"EMBOSSING SYSTEM AND PRODUCT OBTAINED WITH THIS SYSTEM"

DESCRIPTION TEXT

The present invention refers to a new embossing system for making embossed paper products, in particular tissue paper, such as kitchen towels, toilet paper, napkins, handkerchiefs, facial tissue, toilet paper and all tissue paper products.

As ? known, the conventional embossing ? made up of incisions, made with simply punctiform or even decorative motifs, which have the shape of a truncated cone, a truncated pyramid or lines with a truncated pyramid section.

The traditional embossing process involves passing the tissue paper veil between an engraved roller and an embossing roller coated with a layer of rubber which, due to the pressure exerted against the engraved roller, deforms the paper by copying the engraving design present on the steel roller.

The deformation takes place during the rotation of the two rollers, whereby the paper enters smooth between the steel roller and the rubber-coated roller and comes out embossed according to the engraving design made on the steel embossing roller.

The sides of the truncated pyramidal protuberances of the engraved roller are completely smooth, from the head of the bit to the bottom of the bit.

This shape, which is copied from the paper by the effect of the rubber embossing roller, is reproduced on the paper and as a result a dotted sheet is obtained, with truncated pyramidal protuberances.

Figure 2 schematically illustrates the section of the sheet of paper embossed in the conventional way.

Embossing is essentially used to decorate products and above all to improve their most functional characteristics. important, such as the softness, the capacity? absorption and thickness.

Task of the present invention ? to create a new system d? embossing that allows to increase the advantages of traditional embossing and to provide new characteristics to tissue paper products.

Within the scope of this task, a purpose of the invention is that of realizing an embossing system which allows to give a greater thickness to the embossed veil, compared to a product embossed with conventional incisions.

Another object of the invention ? that of creating an embossing system that allows for the creation of a product with greater absorbency.

A further object of the invention ? that of creating an embossing system that allows for the creation of a product that has a better resistance to crushing, during the re-reeling process for products such as toilet rolls and kitchen towels.

Another object of the invention ? that of creating an embossing system that allows for the creation of a product with greater resistance to folding, in the production of products such as napkins, handkerchiefs, facial tissue, U-folded or interfolded towels.

Yet another purpose? that of creating an embossing system that can be used for the production of a new type of tissue paper product, such as kitchen towels, toilet paper, napkins, handkerchiefs, facial tissue, tissue paper and all tissue paper products.

These aims and others which will become clearer hereinafter are achieved by a paper product, of the tissue type, comprising at least one sheet having a plurality of of protuberances, each protuberance having at least one sidewall; said product being characterized by the fact that said wall? stairway.

Further characteristics and advantages will become clearer from the description of preferred, but not exclusive, embodiments of the invention, illustrated for indicative and non-limiting purposes in the attached drawings, in which:

figure 1 ? a side view illustrating the profile of an embossed sheet according to the system object of the present invention;

figure 2 illustrates the profile of a sheet embossed according to the traditional method;

figure 3 ? a sectional view illustrating two engraving tips according to the embossing system object of the present invention;

figure 4 ? a sectional view showing two scoring tips according to the conventional embossing method;

figure 5 ? a plan view of a portion of an embossing cylinder provided with stepped etching tips, according to the present invention;

figure 6 ? a partial view, sectioned along the sectional plane VI-VI of Figure 5, of a row of engraving tips;

figure 7 ? a side view of an incision tip having a truncated pyramid shape with a square base;

the figure 8 ? a plan view of the toe of the preceding figure;

figure 9 ? a side view of a truncated cone-shaped incision tip with a circular base;

figure 10 ? a plan view of the toe of the preceding figure;

Figure 11 shows an example of a decorative pattern formed by a continuous linear protuberance having stepped sides, according to the present invention;

figure 12 ? a partial sectional view of the linear protuberance of the preceding figure;

Figure 13 shows an example of a product consisting of two plies joined by a nested system;

figure 14 shows an example of a product consisting of two plies joined by a tip-to-tip system;

Figure 15 shows an example of a product consisting of three plies joined by a nested system;

figure 16 shows an example of a product consisting of three plies joined by a tip-to-tip system;

figure 17 shows an example of a decorative pattern formed by a plurality of truncated pyramid-shaped points with a square base and truncated cone-shaped points with a circular base;

figure 18 ? a partial view, sectioned according to the XVIII-XVIII sectional plane of the previous figure, of a tip;

figure 19 shows an example of a decorative pattern formed by a plurality of truncated cone-shaped points with a circular base;

figure 20 ? a partial view, sectioned according to the sectional plane XX-XX of the previous figure, of a tip;

figure 21 shows another example of a decorative motif formed by a plurality of of truncated pyramid-shaped points with a square base and truncated cone-shaped points with a circular base.

With reference to the cited figures, the embossing system according to the invention comprises the creation on a sheet of paper 1 of protuberances 2 having stepped surfaces 13.

According to the present invention, the stepped section of each protuberance 2 is obtained by means of points 12 formed on the surface of a steel cylinder 11 and presenting a groove on the side 13 of the points 12 themselves.

The scaling of the sides 13 of the points 12 of the engraved cylinder ? obtained through a process of laser engraving, acid corrosion, which allows you to control the formation of protuberances with such precision as to be able to create steps of depth? of 0.1 mm.

The depth? by 0.1mm? the minimum depth? of engraving of the protuberances such as to be able to appreciate the scaling on the product.

The scaling of the engraving can also be 0.2 - 0.3 -0.4 ~ 0.5 mm, and more.

Figure 6 schematically shows the section of a portion of cylinder on which a series of points 12 are formed having a 0.2 mm groove along the vertical development of each point.

The dimension of the stairway on the plane orthogonal to the vertical of the protuberance? linked to the inclination of the sides 13 of the points 12, greater? the angle formed by the sides of the protuberance, greater ? the stairway on the plane orthogonal to the vertical, in the example of figures 3 and 6, the inclination of the sides ? of 46?.

The embossing process with the aforementioned step generates a profile of sheet 1 of the type illustrated in figure 1.

This type of structure of the embossed sheet 1 has a series of peculiarities which significantly improve the performance characteristics of the product, such as absorbency, thickness, and resistance.

The greatest absorbency? due to the fact that the product generated by the step embossing is less affected by the crushing induced by the transformation process, for example in paper rewound in rolls or folded or interfolded. There? generates an area and consequently a volume underlying the profile of the sheet, greater, which manages to contain a quantity? greater liquid than the profile generated with conventional incision. Figures 3 and 4 schematically show the sections of a stairway structure (figure 3) and of a traditional structure (figure 4).

The greatest thickness of the stepped embossed product? given by the resistance to crushing of the protuberances generated by the stepped profile.

The greatest resistance of the product? due to the fact that the process of penetration of the rubber into the steel embossing roller, and consequently of the paper that fits on the profiles of the tips, is? facilitated due to the profile which opposes less resistance to penetration and consequently the paper adapts more? easily to the profile and suffers less deterioration.

The step embossing system ? designed to be used on 1, 2, 3, 4, 5, or 6 ply products.

The concept of step engraving can be extended to any form of protuberance that is truncated conical punctiform, truncated pyramidal punctiform, or with a truncated pyramidal section.

Figures 7 and 8 are respectively elevation and plan views of a point 12 having a truncated pyramid shape with a square base.

Figures 9 and 10 are elevation and plan views, respectively, of a tip 22 having a truncated cone shape and a circular base.

Figure 11 shows an example of a decorative pattern 4 formed by a continuous linear protuberance 32 having stepped sides 33, according to the present invention.

The stairway embossing system according to the present invention can be advantageously used to associate two or more? veils with the various known techniques such as, "nested", "random", DERL, point to point.

Figure 13 shows an example of product 101 consisting of two plies, indicated with reference numbers 1 and 10, joined by means of a nested system.

Figure 14 shows an example of product 201 consisting of two plies, indicated with reference numbers 1 and 10, joined by a tip-to-tip system.

Figure 15 shows an example of product 301 consisting of three plies, indicated with reference numbers 1, 10, and 20, joined by means of a nested system.

Figure 16 shows an example of product 401 consisting of three plies, indicated with reference numbers 1, 10, and 20, joined by a tip-to-tip system.

Considering the characteristics of each single layered embossed ply, associating the various plies, in a nested, random, DERL, point to point way, in products consisting of 2, 3, 4, 5, or 6 plies, the same advantages are obtained above, compared to products consisting of pi? veils embossed in traditional ways.

Figure 17 shows an example of a decorative motif, indicated with the reference number 5, formed by a plurality of of 12 points, of a truncated pyramid shape with a square base, and of 22 points, of a truncated cone shape with a circular base.

Figure 19 shows an example of a decorative motif, indicated with the reference number 6, formed by a plurality of of 22 points, of a truncated cone shape with a circular base.

Figure 21 shows another example of a decorative motif, indicated with the reference number 7, formed by a plurality of of 12 points, of a truncated pyramid shape with a square base, and of 22 points, of a truncated cone shape with a circular base.

The embossing system according to the present invention ? advantageously usable for making tissue-type paper products, such as toilet paper, kitchen roll, napkins, handkerchiefs, facial tissue, hand towels, etc.

The stairway structure can be applied to products with one or more? veils, coupled through systems, nested, point to point, random, DERL, and others.

The protuberances, punctiform or linear, can have one or more? steps.

The staircase can be applied to a veil, to all the veils or only to some of the veils constituting the final product.

Yes ? in practice it has been observed that the invention achieves the intended aim and objects, a new embossing system having been provided which allows to obtain a product which, thanks to the stepped structure of the embossing, offers superior performance as regards the more functional characteristics. important, such as the softness, the capacity? absorption and thickness, compared to traditionally embossed products.

The system according to the invention ? susceptible to numerous modifications and variations, all of which are within the scope of the inventive concept; furthermore, all the details may be replaced by technically equivalent elements.

Of course the materials used, as well as? the dimensions may be any according to the requirements and the state of the art.

Claims (10)

1. Paper product, of the tissue type, comprising at least one sheet having a plurality of of protuberances, each protuberance having at least one sidewall; said product being characterized by the fact that said wall? stairway. 2. Product according to claim 1, characterized in that each protuberance has the shape of a truncated cone. 3. Product according to claim 1, characterized in that each protuberance has the shape of a truncated pyramid. 4. Product according to claim 1, characterized in that each protuberance ? in the form of a continuous linear relief and has two walls parallel to each other. 5. Product according to claim 1, characterized in that said at least one wall has one or more? steps. 6. Embossing apparatus, comprising at least one embossing cylinder having one or more? protuberances suitable for engraving a sheet of paper; each protuberance having at least one side wall; said apparatus being characterized in that it dictates at least one wall ? stairway. 7. Apparatus according to claim 6, characterized in that each protuberance ? consisting of a tip in the shape of a truncated cone. 8. Apparatus according to claim 6, characterized in that each protuberance ? consisting of a tip in the shape of a truncated pyramid. 9. Apparatus according to claim 6, characterized in that each protuberance ? consists of a continuous linear relief and has two walls parallel to each other. 10. An embossing system comprising forming bumps in at least one sheet of paper; said protuberances having at least one side wall; said system being characterized by the fact that said wall? stairway.