Abstract: The invention relates to a roll constituted by a plurality of tissue paper sheets each having a specific surface weight between 10 and 40 g/m2 and exhibiting thick zones (4) separated over at least 90% of their periphery by thinner zones (5). According to the invention, and as regards at least the outermost turns of the roll, the thick zones are at least partly superposed one on the other in a way to add the thicknesses cumulatively and hence to create height differentials on the roll's outside. The invention also relates to a method for making a roll, wherein a strip composed of a plurality of juxtaposed tissue paper sheets exhibiting thick zones separated by thinner zones will be wound on itself. According to the invention, the winding of the roll is such that the thick zones (4) of the outermost roll turns are at least partly superposed in order to constitute a salient topography on the roll's outside.

Abstract: The sheet of tissue paper includes at least one first embossed zone (A1, A2) having protrusions on a surface corresponding to alveoles on the other. The alveoles have a substantially polygonal base and the sheet includes at least one second, unembossed zone (B). In the invention, the alveoles 101?, 102? are configured along at least one array, the mutually facing sides of two adjacent alveoles define a bridge (P) having rectilinear or substantially rectilinear edges of length L which is larger than its greatest width D, one or several bridges connected to each other subtending a path preferably between two second unembossed zones (B) which are separated by at least one first, embossed zone (A1, A2). The invention also relates to a cylinder embossing such a sheet.

Abstract: The invention concerns a method for making a sheet of paper comprising at least two crimped cotton-wool-like cellulose plies (20, 40). It consists in: unwinding a first ply (20) in the form of a strip from a reel, embossing it on an embossing unit (10, 12) and forming protuberances at its surface, unwinding a second ply (40) in the form of a strip from a reel, guiding it downstream of the embossing unit (10, 12), superposing the two strips, with their protuberances facing inwards, and in applying a linking means (14, 16) so as to make the two strips integral with each other. Said method is characterised in that immediately upstream of said linking means (14, 16), a tension regulating means (18) is applied in the machine direction on one of the strips, such that the two strips have the same clastic deformation in the machine direction when the linking means is applied. The invention also concerns a product obtained by said method.

Abstract: The invention relates to a bundle (16) of stacked products (18) consisting of absorbent paper, of the type which comprises a sheet of flexible material, such as a plastic wrapping sheet (20), and of the type which comprises opening means making it possible to release a zone (86) for gripping at least one paper product (18) in order to extract it individually from the wrapping (20), and of the type of which the opening means comprise a flap (36) which is movable between an opening position and a closing position, covering the gripping zone (86), and which is a part of the wrapping sheet (20) delimited by a precut (72) or a cut of the wrapping sheet (20), characterized in that the precut (72) or cut is arranged in a corner (74) of the bundle (16) and comprises at least two portions which are connected to one another and which each extend over a separate face (22, 28) of the bundle (16).

Abstract: The invention relates to a roll constituted by a plurality of tissue paper sheets each having a specific surface weight between 10 and 40 g/m2 and exhibiting thick zones (4) separated over at least 90% of their periphery by thinner zones (5). According to the invention, and as regards at least the outermost turns of the roll, the thick zones are at least partly superposed one on the other in a way to add the thicknesses cumulatively and hence to create height differentials on the roll's outside. The invention also relates to a method for making a roll, wherein a strip composed of a plurality of juxtaposed tissue paper sheets exhibiting thick zones separated by thinner zones will be wound on itself. According to the invention, the winding of the roll is such that the thick zones (4) of the outermost roll turns are at least partly superposed in order to constitute a salient topography on the roll's outside.

Abstract: This invention relates to a sheet of paper made up of at least two plies of creped tissue paper, an upper ply and a lower ply, each of a surface measure ranging from 10 to 40 g/m2, the upper ply being embossed and provided with first protuberances. It is characterized in that such first protuberances are divided into rows which between them delimit cells of an area ranging from 1 to 20 cm2, the upper ply being longer in the direction of advance than the lower ply by at least 0.6% and joined to it by the apex of the first protuberances so that cushions are formed inside the cells.

Abstract: The invention concerns an absorbent paper product with a basic weight ranging from about 20 to 80 g/m2 comprising an embossed ply including raised designs consisting at least partly of discrete protuberances oriented inwards of the structure and a non-embossed ply. The invention is characterised in that the embossed ply has at least over part of its surface at least 30 protuberances per cm2 whereof the top surface area is less than 1 mm2 preferably less than 0.7 mm2.

Abstract: Optical detector capable of operating in proximity mode or in proximity with background elimination mode, including an emission system and a reception system having hardware and software detection and configuration means capable of recognizing the appropriate mode by measuring the distance of the background, comparing a reception signal with at least one threshold, and automatically switching the reception system into proximity mode or proximity with background elimination mode depending on the result of the comparison.

Abstract: Method for configuring the operating mode of an optical detector, by recognition, following an emission in a first operating mode M1, by means of the receiving system. The latter then confirms the detector in the first operating mode or switches it over into a second operating mode M2 according to whether there is recognition of the first mode. Automatic validation or validation carried out by the operator confirms the recognized operating mode. Application to multimode optical detectors able to operate in barrier, reflex, proximity, background suppression proximity mode.

Abstract: Method for configuring the operating mode of an optical detector, by recognition, following an emission in a first operating mode M1, by means of the receiving system. The latter then confirms the detector in the first operating mode or switches it over into a second operating mode M2 according to whether there is recognition of the first mode. Automatic validation or validation carried out by the operator confirms the recognized operating mode.

Abstract: Optical detector capable of operating in proximity mode or in proximity with background elimination mode.

Abstract: The invention relates to a bundle (16) of stacked products (18) consisting of absorbent paper, of the type which comprises a sheet of flexible material, such as a plastic wrapping sheet (20), and of the type which comprises opening means making it possible to release a zone (86) for gripping at least one paper product (18) in order to extract it individually from the wrapping (20), and of the type of which the opening means comprise a flap (36) which is movable between an opening position and a closing position, covering the gripping zone (86), and which is a part of the wrapping sheet (20) delimited by a precut (72) or a cut of the wrapping sheet (20), characterized in that the precut (72) or cut is arranged in a corner (74) of the bundle (16) and comprises at least two portions which are connected to one another and which each extend over a separate face (22, 28) of the bundle (16).

Abstract: The invention relates to a packet (20) of stacked absorbent paper tissues (64) of the type which comprises a sheet of flexible material, such as a plastic wrapping sheet (21) which comprises opening means allowing a region to be uncovered for grasping at least one tissue (64) so as to extract it individually from the wrapper (21), and of the type which is of parallelepipedal overall shape defined by a height (H), a width (L) and a thickness (E), characterized in that the height (H) and the width (L) are equal so that the packet (20) has square front (22) and rear (24) frontal faces.

Abstract: The invention relates to a manufacturing method for an absorbent structure (10) having at least two plies (P1, P2) each constituted of at least one embossed sheet of creped absorbent paper, wherein the plies (P1, P2) engage between two engraved metal cylinders (CG1, CG2) fitted with protrusions (R1, R2), driven in synchronized rotation, and mutually nesting with a play (J) between the tops of the protrusions (R1, R2) of one metal cylinder (CG1, CG2) and the opposite trough surface (F2, F1) of the engraving of the other cylinder (CG2, CG1), the method being characterized in that the play (J) is less than the depth of the cylinder engravings and larger than the sum of the thicknesses (E1, E2) of the plies (P1, P2) which were previously shaped in such a matching manner that the plies (P1, P2) are not compressed when being engaged between the nested engraved cylinders (CG1, CG2).

Abstract: Hot-rolled steel sheet which then can be cold-rolled, coated, the steel in the sheet having the following composition by weight: 0.15%<carbon<0.5% 0.5%<manganese<3% 0.1%<silicon<0.5% 0.01%<chromium<1% titanium<0.2% aluminum<0.1% phosphorus<0.1% sulfur<0.05% 0.0005%<boron<0.08%, the remainder being iron and impurities inherent in processing, the sheet ensuring a very high mechanical resistance after thermal treatment and the aluminum-based coating ensuring a high resistance to corrosion.

Abstract: The compound sheet made of absorbent paper consists of at least two crepe paper sheets with a specific weight between 12 and 30 g/m2. At least one sheet includes a first embossing pattern with bosses pointing inward the compound sheet and having a height of between 0.5 and 2.5 mm, a density of between 3 and 20 bosses per cm2 and covering 5 to 60% of the surface. The compound sheet is characterized in that the embossed sheet comprises a second embossing pattern with bosses 0.1 to 0.30 mm high.

Abstract: A sheet constituted by at least two plies of cellulose wadding or other layer of cellulose fibers having a specific surface weight between 10 and 40 g/m.sup.2 and are embossed and assembled in such a manner that the protrusions defining the embossing patterns are pointing to the inside of the sheet and subtend cavities between them, the sheet being characterized in that the plies (10, 20) are embossed with different embossing patterns, a first pattern composed of first protrusions (12) having only a small surface at the tops and being at least 30/cm.sup.2 in one of the plies (10), and a second pattern composed of pattern elements (21) formed by second protrusions (22) having elongated tops, where the pattern elements are mutually spaced apart, and are present in the second ply (20).

Abstract: A sheet of paper, in particular for a sanitary paper, consists of at least one ply of absorbent, creped paper of a specific surface weight between 12-35 g/m.sup.2 evincing first and second protrusions respectively (10, 2) respectively arrayed in a first and second pattern. The first pattern is composed of pattern elements each constituted by at least one of the first protrusions (10) and is comparatively well spaced apart mutually, while the second so-called background pattern comprises the second protrusions (2) arranged in more compact manner between the pattern elements. The sheet of paper is characterized in that the pattern elements form a graphic pattern while being arrayed at a rate of at most 0.5 element/cm.sup.2 and the first protrusions (10) constituting them evince at their top a line-shaped surface with a width between 0.1-2 mm, the second protrusions (2) being arrayed at the rate of at least 30, and preferably 40, protrusions/cm.sup.2 and ensuring the essential functional features.

Abstract: The cellulose fiber (tissue) product of the invention, such as a handkerchief or napkin, is made by combining at least two tissue plies cut into a desired format and connected to one another along a peripheral zone, and is characterized in that the plies are adhesively bonded along the perhipheral zone in such a manner that they evince a minimum delamination strength of 1 g/cm, and the peripheral zone is less than 50% of the total product surface.

Abstract: An absorbent multi-layer sheet, with at least two layers each constituted of at least one embossed ply of creped absorbent paper having a specific surface weight between 10 and 40 g/m.sup.2 per ply, with an external surface forming the outer side of the multi-layer sheet and an inner surface, the inner surface of the first layer including first and second protrusions and the inner surface of the second layer including third protrusions nested between the-protrusions of the first layer, the two layers being bonded together by at least part of the protrusion tips of one layer adhesively joined to the other layer between two protrusions, is characterized in that the bonding is implemented by the first protrusions of the first layer, the second protrusions having a lesser height than the first ones and their tips being adhesive-free.