IMPROVEMENT TO EMBOSSING ASSEMBLY FOR PROCESSING PAPER

Abstract

IMPROVEMENT TO AN EMBOSSING ASSEMBLY FOR PAPER PROCESSING, comprising two independent embossing rollers (1a) and (1b), and the respective press rollers (2a) and (2b), forming two embossing lines, for two layers of paper (Pa) and (Pb); the two embossing rollers (1a) and (1b) have their diameters with reliefs (3a) and (3b) distributed on parallel embossing rows of two paper layers (Pa) and (Pb); at least one of the embossing lines includes a glue applying station (4) with glue transferring rollers (5), one of which is in contact with the corresponding embossing roller (1a); a third press roller (2c) works with the first embossing roller (1a) and, at this point, the two paper layers (Pa) and (Pb) pass, already embossed and overlapped, fitted between themselves and glued; the precise integration of both paper layers (Pa) and (Pb) occurs due to an angular shift (α) previously defined between the relief rows (3a) and (3b) of the embossing cylinders (1a-1b).

Claims

1) IMPROVEMENT TO AN EMBOSSING ASSEMBLY FOR PAPER PROCESSING, comprising two independent embossing rollers (1a) and (1b), assembled in parallel with each other, with each having its own press roller (2a) and (2b) , forming two embossing lines, for two layers of paper (Pa) and (Pb); the two embossing rollers (1a) and (1b) have their diameters with reliefs (3a) and (3b) distributed on the diameters of the embossing cylinders (1a) and (1b), forming parallel rows on which the embossing of two paper layers (Pa) and (Pb) is made between the respective pairs of embossing rollers (1a-1b) and press rollers (2a-2b); at least one of the embossing lines includes a glue applying station (4) with glue transferring rollers (5), one of which is in contact with the corresponding embossing roller (1a) at a point after the corresponding press roller (2a); a third press roller (2c) works with the first embossing roller (1a) and, at this point, the two paper layers (Pa) and (Pb) pass, already embossed and overlapped, fitted between themselves and glued, whereas at this point the mirrored paper layers (Pa) and (Pb) are overlapped and there is an integration between them in order for the reliefs to fit within each other, a fitting that is not completed due to the conic geometry of each; consequently, the paper layers (Pa) and (Pb) are separate from each other, however, the reliefs are fitted and remain at this position due to the glue points; characterized by the fact that the parallel relief rows (3a) and reliefs (3b) of the embossing roller (1a) and the embossing roller (1b) present an angular shift (α).

2) IMPROVEMENT TO AN EMBOSSING ASSEMBLY FOR PAPER PROCESSING, according to claim 1, characterized by the fact that the angular shift is obtained according to a shift angle (α) of solely reliefs (3a) or (3b) of one or both embossing rollers (1a) or (1b).

3) IMPROVEMENT TO AN EMBOSSING ASSEMBLY FOR PAPER PROCESSING, according to claim 1, characterized by the fact that the final angular shift may be the sum of the shift angles of the reliefs (3a) and (3b) of both embossing rollers (1a) and (1b).

Description

DESCRIPTION OF THE DRAWINGS

[0011] To better understand the assembly, what follows is a detailed description of it, with reference to the attached drawings:

[0012] FIG. 01 represents a schematic side view of a machine with enhanced embossing rollers according to the present invention for two layers of paper;

[0013] FIG. 02 shows expanded details of the embossing profile and the joining of both embossed paper layers;

[0014] FIG. 03 shows two embossing rollers emphasizing the angular shift of the parallel relief rows;

[0015] FIG. 04 schematically illustrates the plain surface of the two embossing rollers, emphasizing the angular shift of the parallel embossing relief rows;

[0016] FIG. 05 is a view identical to the previous one, emphasizing the fact that the angular variation of the relief rows of both embossing rollers allows for a variation in the design of the resulting paper's texture; and

[0017] FIG. 06 shows a perspective view solely to provide an example of one of many products obtained with the present invention.

[0018] According to these illustrations and their details, particularly FIG. 01, the present IMPROVEMENT TO AN EMBOSSING ASSEMBLY FOR PAPER PROCESSING presents a preferred embodiment defined by two embossing rollers (1a) and (1b) that are independent and assembled in parallel one from another, and each has its own press roller (2a) and (2b), forming two embossing lines for two layers of paper (Pa) and (Pb).

[0019] Both embossing rollers (1a) and (1b) have their diameters with a multitude of reliefs (3a) and (3b) with a specific geometry, which could be, for instance, conical, pyramidal or another, including reliefs that form all sorts of figures or words convenient for the desired final product. Reliefs, regardless of their geometry, are distributed along the diameters of the embossing cylinders (1a) and (1b), forming parallel rows.

[0020] For the embossing of both paper layers (Pa) and (Pb), they pass between the respective pairs of embossing rollers (1a-1b) and press rollers (2a-2b). Notice that the paper layers (Pa) and (Pb) are mirrored and the reliefs of both are turned against one another to be overlapped.

[0021] At least one of the embossing lines includes a glue applying station (4) with glue transferring rollers (5), one of which is in contact with the corresponding embossing roller (1a) at one point after the corresponding press roller (2a), so that the glue can be applied to the paper layer (Pa) while it is in said embossing roller (1a).

[0022] A third press roller (2c) works with the first embossing roller (1a) and, at that point, both paper layers (Pa) and (Pb) already embossed and overlapped, pass through, are fitted between themselves and glued together. At this point (see FIG. 2), notice that the mirrored paper layers (Pa) and (Pb) are juxtaposed and there is an integration between them in order for there to be a fitting of the reliefs of each one, a fitting that is not completed due to the conic geometry of each, consequently, the paper layers (Pa) and (Pb) are separate from each other, however, the reliefs fit and remain in this position due to the glue points.

[0023] In relation to the FIGS. 3, 4 and 5, the precision of the integration between both paper layers (Pa) and (Pb) occurs due to an angular specificity (α) previously defined between the rows of reliefs (3a) and (3b) of the embossing cylinders (1a-1b).

[0024] The angular definition (α), as previously stated, is established according to each project, for it considers different factors, not just dimensions but also those inherent to the chosen geometry, as well as any irregular forms that are obtained through the embossing of marks and drawings.

[0025] The angular definition is illustrated with details in FIGS. 3 and 4, through which it is verified that the invention is characterized by the fact that the parallel rows of reliefs (3a) and reliefs (3b) of the embossing roller (1a) and embossing roller (1b) present an angular shift (α) preferably between 4° and 13° degrees.

[0026] The angular shift may be obtained with a shift angle (α) of solely reliefs (3a) or (3b) of one or both embossing rollers (1a) or (1b).

[0027] The final angular shift may be the sum of the shift angles of the reliefs (3a) and (3b) of both embossing rollers (1a) and (1b).

[0028] The study of the angular shift (α) may be performed through known means, through software or using digital or physical graphical simulations.

[0029] As one may notice, after what has been exposed and illustrated, the angular shift (α) makes it possible to establish the best form of construction for the embossing rollers (1a) and (1b), which results in paper embossing layers (Pa) and (Pb), which may be joined in an overlap, and the reliefs (3a) and (3b) combine for the best fit within each other (FIG. 2) and, in the end, the previously stated advantages are achieved: a practical elimination of rough points, considerable increase in volume; and considerable increase of softness. The sum of said characteristics improves the tactile feel and makes it more pleasant; also, the angular variation (α) between the reliefs, as shown in FIGS. 5 and 6, grants means to vary the design of the tecture of the final product, which, as stated, may be any article that requires the use of sheets with the aforementioned characteristics, especially: toilet paper, paper towels, paper tissue and others.