JPH09503030A - Double cellulose thin layer, manufacturing apparatus and manufacturing method thereof - Google Patents

Abstract

(57) Summary An embossed paper layer with two lamina. Each embossed portion of one lamina is adhesively bonded to the non-embossed areas of the other lamina. The lamellae are produced by two closely spaced pattern rolls juxtaposed to form a nip. Each pattern roll has a protrusion extending in the radial direction so as to come into contact with the peripheral edge of another pattern roll in the middle of the protrusion. The lamina is fed through the nip in face-to-face relationship, embossed, and adhesively bonded to another lamina by a radially extending protrusion.

Description

Detailed Description of the Invention             Double cellulose thin layer, manufacturing apparatus and manufacturing method thereof                               Field of the invention   The present invention relates to an embossed cellulosic fiber structure and this embossed cellulosic material. The present invention relates to a method and an apparatus for manufacturing a base fiber structure.                               BACKGROUND OF THE INVENTION   Cellulose fiber structure is an important product in daily life. Cellulose fiber structure Consumption such as, paper towels, toilet tissue, and facial tissue Used as a material.   Multi-layer cellulosic fiber structures are very well known in the consumer product arts. I have. Such products typically consist of two or more, typically two or more, forming thin layers in a face-to-face relationship. Is a cellulosic fiber structure with two overlaid lamellae. These thin layers are Often, when used by the user, it maintains a thin layer in a face-to-face relationship and It is embossed for aesthetic reasons so as to form voids in between.   During embossing, a thin layer is formed between juxtaposed axially parallel rolls. Sent through the nip. The protrusions on these rolls engage the opposing lamina. The same area of each lamina is compressed in a mating contact relationship. Thin layer compression area is aesthetic A pattern is formed and the laminae are bonded and held in face-to-face contact with the laminae.   Embossing is done in two ways: the protrusions form the nip between the rolls. Knob-to-knob embossing juxtaposed parallel to the axial direction to achieve Nest embossing in which the protrusions of one roll mesh with the protrusions of another roll It is done by either. Knob-to-knob embossing and nest embossing No. 3,414,45 issued to Well on December 3, 1968. No. 9, US Pat. No. 3,547, issued to Guessman on December 15, 1970, No. 723, issued to Donnelly on January 2, 1973, U.S. Pat. No. 3,708, No. 366, US Pat. No. 3,738, issued to Thomas on Jun. 12, 1973. No. 3,905 issued to Nystrand on February 18, 1975. , 867,225, U.S. Pat. No. 4,48 issued Nov. 20, 1984. No. 3,728, U.S. Pat. No. 4,483,7 issued Nov. 20, 1984. No. 28 in the prior art. March 1976, published in Appleman US Patent No. 239,137, issued on the 9th, is a commercially successful paper tao Shows the embossed pattern found in   For cellulosic fiber structures that have been embossed as a consumer product, Is aesthetically pleasing because the product has a highly cloth-like appearance and a relatively thick thickness Hope to have a pattern. All these features are soft, absorbent and thin layer Provided without sacrificing other desirable properties of consumer products between bond strength between I have to.   Different attempts are made to improve on the embossed parts caused by the embossing process. . For example, such an approach has been shown to use embosses with different depths and asymmetrical embossments. Done to provide the boss pattern. In some of these attempts, non- Symmetrical embossing allows for each layer of consumer product to have a different orientation. is there. Other attempts have been to develop an embossed sheet with certain dimensions that appear on a particular surface. To provide the boss. Another attempt at this technology is for manufacturers to emboss Is a specific angle with respect to the machine direction of. An example of such an attempt is March 1982. U.S. Pat. No. 4,320,162, issued to Schulz on the 16th, April 1987. U.S. Pat. No. 4,659,608, issued to Schulz on March 21, 1990 Shown in U.S. Pat. No. 4,921,034 issued to Burgess on May 1 You. Creases that are combined into a special shape and provide a pattern that corresponds to the embossing Strike Attempts have been made in the art to provide embossments with and with indentations. This technique At least one attempt in the field has been to find very short distances between the facing rolls. 3 shows a particular device with mesh protrusions that meet at. This configuration is described above Cause nest embossing. An example of such an attempt in the art is 1976. U.S. Pat. No. 3,940,529 issued Feb. 24 to Hepford et al., 1 U.S. Pat. No. 4,325,773, issued Apr. 20, 982, 1984. Shown in U.S. Pat. No. 4,487,796 issued December 11 to Lloyd et al. ing.   Other attempts in this field have been to form embossed cellulose fiber structures. Therefore, the specific dimensions of the protrusion and the recess are shown. One example of such an attempt is US Pat. No. 3,961,119 issued to Thomas on June 1, 1976 It is shown.   The resulting cellulosic fiber structure consists of two known basic treatments, knob-to-no. Manufactured by either embossing or nest embossing . However, the cellulosic fiber structure produced by either treatment is Wipe with a towel, toilet tissue or facial tissue When used as a consumer product, it has certain drawbacks as described below.   What is needed in this technical field is that the consumer has a quality appearance and is thin during use. Cellulose fiber construction so that a product can be obtained in which the layers do not separate easily. It can give the structure a thick thickness and a quilted cloth-like appearance, which This is a different type of embossing treatment.                             Brief summary of the invention   SUMMARY OF THE INVENTION The present invention is a cellulosic fiber construction having opposite outer surfaces and two thin layers. Have structure. The thin layers are joined in a face-to-face relationship. Each of the thin layers is a thin It has an inner surface facing the layer and an outer surface facing it. Each of the two lamina is non- The embossed area and the non-embossed area are projected toward other thin layers and bonded. It has an embossed portion bonded with a drug.   The present invention uses two juxtaposed axes with their axes parallel to each other to form a nip therebetween. Having two pattern rolls, for producing such a cellulose fiber structure, Have a device. Each of the pattern rolls protrudes from its peripheral edge in the radial direction Has a plurality of protrusions facing toward. Each protrusion contacts the edge of the other pattern roll Has a distal end to   The present invention comprises a method of making such a cellulose fiber structure. This method A relationship parallel to the axial direction to form a nip between the radially oriented protrusion And preparing two pattern rolls juxtaposed to each other. Projection of each roll Its distal end contacts the periphery of the other said pattern roll. Two thin layers are prepared Forwarded through this nip in face-to-face relationship, separated by protrusions An embossed portion is formed. Adhesive is applied to each of the embossed portions. Each thin layer Is adhesively bonded to the other roll at the embossed portion.                             Brief description of the drawings   The specification concludes with claims which particularly specify and specifically claim the invention. However, it can be better understood with reference to the drawings in which the same parts are given the same reference numerals. It will be possible.   FIG. 1 is a partial sectional view of a cellulose fiber structure according to the present invention.   2 shows the cellulose fiber of FIG. 1 in which the embossed portion of the second layer is shown in broken lines. It is a partial top view.   FIG. 3 is a side view of a prior art device using a knob-to-knob embossing process. is there.   3A shows the pattern roll of FIG. 3 having a cellulose fiber structure in the nip. It is an enlarged view of the nip between them.   FIG. 4 shows a prior art cellulose fiber structure manufactured by the apparatus of FIG. It is a vertical cross-sectional view of the structure.   FIG. 5 is a side view of a prior art device using nest embossing. .   FIG. 5A shows a nickel having a cellulose fiber structure between the pattern rolls of FIG. FIG.   FIG. 6 shows a prior art cellulose fiber structure manufactured by the apparatus of FIG. FIG. 6 is a partial cross-sectional view in the vertical direction of the structure.   FIG. 7 is a side view of an apparatus used for embossing according to the present invention.   FIG. 7A is an enlarged view of a nip having a cellulose fiber structure between pattern rolls. FIG.   FIG. 8 shows a modular pattern having a base roll, an inner shell and a fixed assembly. FIG. 8 is a vertical cross-sectional view of one of the pattern rolls of FIG. 7 showing a roll roll. .   FIG. 9 shows the vertical direction of the cylindrical perforated shell used in the pattern roll of FIG. FIG.   FIG. 10 shows the cylinder of FIG. 9 for making the modular pattern roll of FIG. FIG. 7 is a vertical profile of a protrusion shown in a partial cross-sectional view of a shaped perforated shell.                             Detailed Description of the Invention Cellulose fiber structure   Referring to FIG. 1, one embodiment of the present invention has a cellulosic fiber structure 20. You. The cellulosic fibrous structure 20 according to the present invention comprises two fibers bonded in a face-to-face relationship. It has thin layers 20T and 20B. Each of the lamina 20T and 20B has two distinct layers. To the area, the basic continuous non-embossed area 24 and then outwardly, preferably It has areas 22 that are embossed separately and project at right angles to it. Each thin Each region 22 and 24 of layer 20T or 20B is a fiber that resembles a straight member. .   The fibers are (perpendicular to each other and perpendicular to the longitudinal axis of the fiber and radially. ) Compared to the other two relatively very small dimensions (along the longitudinal axis of the fiber A member of cellulosic structure 20 having one relatively large dimension, As a result, microscopic examination of the fiber reveals that two other The dimensions will be apparent, but two other smaller dimensions like these are about the same or It does not have to be constant throughout the axial length. The fiber bends around its axis , Bent against other fibers, distributed by liquid transport or air.   The fiber having the cellulosic fiber structure 20 is a polyolefin or a polyester. It may be a synthetic fiber such as cotton linter, rayon or bagasse Such cellulose is preferred, soft wood (enzygous or coniferous) or hard Further preferred is wood pulp, such as arboreal (angiosperms or deciduous trees). Use here A fibrous structure 20 such as that used if the fibrous structure 20 comprises these fibers as described above. But not limited to at least about 50% by weight, or at least 5% It has 0% by volume of cellulose fibers. About 2. 0 to about 4. 5 mm length And soft wood fibers having a diameter of about 25 to about 50 micrometers, and Has a length of less than 1 millimeter and a diameter of about 25 to about 50 micrometers It has been found that solid wood fibers work well in the cellulosic fibrous structure 20.   If wood pulp fibers are selected for the cellulosic fiber structure 20 In addition, fibers are treated with chemical treatments such as sulfuric acid and sulfurous acid and soda treatment and grinding stones. It is manufactured by pulp processing including such mechanical processing. Alternatively, the fiber Manufactured by a combination of chemical and mechanical processes, or recycled It is. The fiber type, combination and treatment are not critical to the invention. Person Wood and soft wood fibers are layered to the thickness of the cellulosic fiber structure 20.   According to the invention, the cellulosic fibrous structure 20 is flat in the two-dimensional direction, but It does not have to be flat. Cellulose fiber structure 20 has a thickness in a third direction. Having. However, the third dimension, compared to the actual first two directions, Or a cellulosic fiber structure 20 having relatively large dimensions in the first two dimensions Relatively small compared to manufacturing capacity.   The cellulosic fibrous structure 20 according to the invention comprises two layers 20T and 20B. I do. A “thin layer” means that no additional fibers are added to or removed from the sheet. Forming part of a papermaking machine as a sheet with a pre-drying thickness that does not change as long as possible It was taken from the wood. Each lamina 20T or 20B is the same as the other lamina 20B. Or it is bound to 20T. Each lamina 20T or 20B is the opposite lamina 2 Directly bonded to 0B or 20T, or connected through an intermediate layer Or if desired, sandwiched between thin layers 20T and 20B .   Each thin layer 20T and 20B of the cellulosic fibrous structure 20 has another embossed portion 22 Of thin layers 20B and 20T. In particular, the distal end of each embossed portion 22 23 project toward the non-embossed regions 24 of the opposing thin layers 20T and 20B. It is coming out and is in contact with it.   Adhesive is applied to the distal end 23 of each embossed portion 22, and each embossed portion 22 is Bonded by adhesive to the non-embossed regions 24 of the opposing lamina 20T or 20B. It is. The structure is such that each lamina 20T and 20B has an adhesive applied to the distal end. Two lamina 20T and 2 bonded to lamina 20T and 20B at embossed portion 22 A cellulose fiber structure having 0B is provided. This configuration provides the following effects. Offer. That is, the bonding of the thin layers 20T and 20B with an adhesive is not necessary in the manufacturing process. Shaped in a closely spaced pattern when actually manufactured by the equipment being used. It can be achieved. Alternatively, adhesive bonding may be used It can also be formed in places that are very sparse over the fiber structure.   Cellulosic fibrous structure 20 is formed between the outward facing surfaces of lamina 20T and 20B. Considered as having an imaginary center plane P-P intersecting the cellulose fiber structure It is. The embossed portion 22 of each lamina 20T and 20B is Starting on one side of the virtual center plane P-P, traversing the virtual center plane P-P, The distal ends of layers 20T and 20B are located opposite the imaginary center plane PP.   As such, the proximal and distal ends 23 of the embossed portion 22 are the cells of the present invention. The loin fiber structure is arranged on the opposite side of the virtual center plane PP. In addition, The cellulose fibers at the distal end 23 of the embossed portion of the two thin layers 20T and 20B are Compressed by the device according to the invention. On the contrary, according to the conventional technology, Cellulose produced by st embossing and knob-to-knob embossing In the fiber structure 20, the proximal and distal ends 23 of the embossed portion 22 have an imaginary plane P. On the same side of P. Cellulos on the embossing side 22 of the thin layer 20T or 20B only The fiber is a non-woven fabric of another thin layer 20T or 20B of prior art nest embossing. Compressed against the boss area.   Referring to FIG. 2, the embossed portion 22 of the first thin layer 20T is the second thin layer 20T. It does not match the embossed part of B. This configuration is suitable for other thin layers 20T or 20 Bond the embossed portions of one thin layer 20T and 20B to the non-embossed area 24 of B The effect that the process for taking is taken is provided. This configuration is shown in Figure 1. One thin layer 20T or 20B of non-embossed regions 2 between embossed portions 22 The width of 4 is indicated at its midpoint 25 by the embossed portion of another lamina. Sa Additionally, a midpoint 25 of this width is present at the distal end 23, such as the embossed portion 22. Reinforced by the adhesive.   Of course, the embossed portion 22 and the non-embossed area 24 are Does not intersect the midpoint 25 of the width of the non-embossed regions 24 of the other thin layers 20T and 20B. It is arranged in such a pattern. However, in such a configuration, The distal end 23 of the boss portion is applied to the two lamina 20T and 20B, Bonded with an adhesive. In addition, the embossed portion 22 is aligned at the midpoint 25 of the width. The non-matching embossed portion 22 supports the width of the other lamina 20T or 20B.   The embossed portion of each lamina 20T and 20B is responsible for the compression of the fibers that occurs during embossing. Therefore, a region having a relatively large density is formed. "Embo" used here The “s” is formed by deforming a relatively small portion of the cellulose fiber structure 20 that is perpendicular to the plane. Pressing protrusions such as cellulosic fibrous structure 20 against a relatively hard surface To permanently break the bond between fibers. Emboss transforms like that A permanently localized deformation occurs at the defined location 22.   The embossed portion of the cellulosic fiber structure 20 produces the cellulosic fiber structure 20. A non-random repeat corresponding to the shape of the device described below used to It is arranged in a pattern. Preferably, the non-random repeating pattern is The embossed portions 22 contacting each other are arranged in a mosaic shape so as to be adjacent to each other. Preferably , "Non-random" allows the embossed portion 22 to have a predictable placement. Is considered to be present and occurs as a known predetermined result of the manufacturing process. Used here “Repeat” means that the same pattern is repeatedly formed in the cellulose fiber structure 20. Means that. By separating the embossed parts, the adjacent embossed parts Minutes 22 are not adjacent.   The essentially continuous non-embossed area 24 used here is the Extends across the fiber structure in one or both orientations. This basically continuous The non-embossed area has a smaller density than the embossed portion 22. because , The basically continuous non-embossed area 24 is not compressed in the embossing process Because. The density of the contiguous non-embossed areas 24 is such that the The density of the boss portion 22 is almost the same.   If the cellulose fiber structure 20 shown in FIG. 1 and FIG. Used as a consumer product such as a tissue or toilet tissue If not, the non-embossed areas of the cellulosic fibrous structure 20 are It is preferred to be contiguous in the plane of structure 20 in two orthogonal directions. this Such orthogonal directions are parallel and perpendicular to the edges of the finished product, or It is not always necessary to be parallel and perpendicular to the manufacturing direction of the product. Tensile load Makes it even easier for applied tensile loads without the product prematurely losing The tensile strength is imparted to the cellulose fiber in two orthogonal directions as applied It is very important to. Preferably, at least one continuous direction is of the present invention. Parallel to the direction of predicted tensile loading of the finished product according to this example .   One example of a basically continuous non-embossed area is shown in FIG. Basic Another example of a cellulosic fibrous structure having a continuous region is January 20, 1987. Shown in U.S. Pat. No. 4,637,859 issued to Trokhan on Referenced for the purpose of showing another cellulosic fiber structure 20 having an essentially continuous region. More here is incorporated. The interruption of the continuous non-embossed area 24 is As long as such interruptions do not adversely affect the properties of the material in the area of the cellulosic fibrous structure 20. Acceptable, but not preferred.   Of course, when the cellulosic fiber structure 20 is manufactured, it is relatively large and is embossed. The portion 22 is relatively small compared to the dimensions of the fiber structure 20 being manufactured, If the size of the embossed portion 22 and the connection are changed, Determining the exact distribution and pattern between successive non-embossed areas 24 is Difficult or the pattern is non-random.   Conversely, for the consumer, the cellulose fiber structure 20 is relatively small and the If the minute 22 is provided as a relatively large piece, repeat the putter during manufacture. When the fibers are present in the large scale cellulosic fiber structure 20, the pattern repeats. It doesn't seem to be returned. Cellulosic fiber structure 20 suitable for its intended purpose Continuous with the embossed portion 22 as desired to have performance characteristics. It is important that the non-embossed areas 24 are dispersed.   The embossed portion 22 and the non-embossed area 24 have a density intermediate between those of the embossed portion 22 and the non-embossed area 24. Those skilled in the art will appreciate that there is a small transition region that surrounds the boundary portion 22 and forms a boundary. I can solve it. Such transition areas are regular in the manufacturing process and As expected, either the embossed portion 22 or the non-embossed area 24 It is not confused with Reika.   Referring to FIG. 2, the pattern of embossed portions within the cellulosic transition structure 20 Dimensions range from about 2 to about 11 pieces per square centimeter (1 per square inch 0 to 70) embossed portions 22, preferably 1 square centimeter About 5 to about 8 (30 to 50 per square inch) embossing parts It changes at 22. The embossed portion 22 has a main axis of 45 ° from the machine direction of the manufacturing machine. Pattern on the left and right sides alternately or in a single direction stepwise Or is positioned to align adjacent to the embossed portion 22 .   If desired, the adhesive may, in other embodiments, be applied to selected embossed portions 22. Applies only to the distal end 23. This configuration is relatively It has the advantage of forming a soft cellulose fiber structure 20.   Continuing to refer to FIG. 2, the embossed portion of the first thin layer 20T is the second thin layer 20T. It does not match the embossed portion 22 of 20B. This configuration has one thin layer 20T Is the embossed portion of 20B of another thin layer 20B or of the non-embossed area 24 of 20T. Provides the advantage that a distinct process of bonding to the non-embossed portion 22 can be taken I do.   In addition, this configuration provides one thin layer 20T or 20B between the embossed portions 22. The width of the non-embossed area 24 of the other thin layer 20B or 20T Provides the advantage of being supported at its midpoint 25. Moreover, like this The midpoint 25 of different width is due to the adhesive present at the distal end 23 of the embossed portion 22. To be strengthened.   In addition, the non-embossed areas 24 are likely to be separate embossed portions 22. Moreover, it is not made compact by the manufacturing process. In the compression between these areas The differences result in an aesthetically discernible pattern in the cellulose fiber structure 20. to make. In particular, this pattern has a cloth-like appearance in a quilt of cellulose fiber structure 20. And this appearance is enhanced as desired by the steps described below. Can be minimized.   Method and apparatus   Referring to FIGS. 3 and 3A, prior art embossing is a nest embossing. Manufactured by a method called. In the nest embossing method, there are two The laminae 20T and 20B are interlocking pressure rolls 26T and 26B, as described above. An emboss is formed between the patterned rolls 28T and 28B. Pattern low The axes of the rolls 26T and 26B and the pattern rolls 28T and 28B are parallel. Are juxtaposed to each other to form three nips, that is, the top pressure roll 26T and the top pad. The first nip portion between the turn roll 28T, the bottom pressure roll 26B and the bottom roll 26B. The second pattern nip portion between the upper pattern roll 28B and the upper pattern roll 28B. A third nip portion is formed between the tom pattern rolls 28T and 28B.   The pattern rolls 28T and 28B have protrusions 30, which are half Extends radially outwardly to the peripheral edge 31 of each pressure roll 26T or 26B at each nip. In contact. Each lamina 20 bonded to the resulting cellulosic fiber structure 20 T and 20B are the nip between the pattern rolls 28T or 28B and each pressure roll. Routed through the nip between the two 26T or 28B. Each thin layer 20T and 20 B is placed on the nip portion by the protrusion 30 of each pattern roll 28T or 28B. And is embossed.   One of the thin layers 20T and 20B, after being embossed, has an adhesive applicator Has an adhesive applied to the embossed portion 22 by a roll 32. Adhesive app The caterroll 32 is used in connection with either of the lamina 20T and 20B, Compress these thin layers 20T and 20B against each pattern roll at the boss portion 22. In order to do so, the layer bonding roll 34 is arranged. In this process, the embossed part Minute 22 is only at the location of lamina 20T and 20B where the adhesive is applied. why Then, the embossed portion 22 can be bonded to the adhesive applicator roll 32. This is because it is only a part of the thin layers 20T and 20B. In this way the adhesive , The thin applicator roll 3 without coating the entire surface of the thin layers 20T and 20B. Embossing of lamina 20T and 20B used to contact it in relation to 2. Only the portion 22 is coated.   Next, a thin adhesive applied to the embossed portion 22 of one thin layer 20T or 20B. Layers 20T and 20B are of top and bottom pattern rolls 28T and 28B. Sent through the nip between. At this nip, the thin layers 20T and 20B are Juxtaposed in face-to-face relationship, the embossed portions 22 of each lamina 20T and 20B are Aligned with the non-embossed regions 24 of thin layers 20T and 20B.   The embossed portion with the adhesive applied from the adhesive applicator roll 32 To assure, adhesive applicator roll 32 or associated pattern roll 28 The lamina 20T and 20B fed through the nip between B and the layer-bonding roll 34 are , Contacting and fixed to the non-embossed regions 24 of the opposing thin layers 20T and 20B You. The pattern roll 28B juxtaposed with the binding roll 34 is formed by the embossed portion 22. It contacts the lamina 20B and is removed by the separate protrusions 30 of the pattern roll 28B. Prevents the periphery of the thin layer from contacting the thin layer 20B sufficient to cause compression of the thin layer 20B. You.   Referring to FIG. 4, cellulosic fibers produced by nest embossing The structure 20 is thinly bonded with adhesive only at the alternating embossed portions 22. It has layers 20T and 20B. This alternating adhesive pattern has an intermediate The boss portion 22 results from being uncoated with adhesive. This structure is a book Bond strength between thin layers 20T and 20B for a cellulosic fiber structure 20 according to the invention. Reduce the degree. Because, in the cellulose fiber structure according to FIG. This is because not all the embossed portions 22 are bonded to the layers 20T and 20B. .   The solution to bond strength relates to both pattern rolls 28T and 28B. Then, the adhesive application roll 32 is used. However, this solution Infeasible. This is because the pattern roll 28T or 28B and the layer bonding The contact between the roll 34 and the embossed portion 22 of the layer 20B and the layer bonding roll 34 is This is because it occurs only at the protrusion 30 of the aligned pattern roll 28T or 28B. You. Align the distal end 23 of the embossed portion 22 with the embossed portion 22 having the adhesive The contact that occurs in the absence of contact does not allow the adhesive to contact the other layers 20T or 28B and Does not combine.   Contact that occurs throughout the lamina 20T and 20B of the cellulosic fibrous structure 20 Another obvious use of two smooth surface layer bonding rolls 34 to ensure A solution is used. However, this obvious solution is 34 additional expenses are required. However, the shape between the two smooth surface rolls The formed nip compresses the cellulosic fibrous structure over its entire area to create a fiber-to-fiber structure. Breaks fiber bonds to form consumer products with small thickness and low tensile strength However, Kirtin is desired for high quality and more aesthetically pleasing consumer products. It does not show the appearance of gu.   Referring to FIGS. 5 to 5A, the embossed portion 22 is used to bond the adhesive. One method well known in the art for this purpose is knob-to-knob embossing. You. Each pattern roll 28T and 28B in the knob-to-knob embossing process Of the other pattern roll 28B or 28T. You. In this way, each protrusion 30 of one roll 28T or 28B may be The protrusions 30 of the rolls 28B or 28T facing each other.   Referring to FIG. 6, a cellulose fiber made by knob-to-knob embossing. The fiber structure 20 has recesses on two sides at each embossed portion 22. These two sides The recesses in the surface are formed by the compression of the aligned protrusions 30. This configuration is -Forms a cellulosic fiber structure 20 that loses calipers in balance of operation You. Because the cellulose fiber structure 20 is applied to one of the thin layers 20T and 20B. The embossed portion 22 does not have an embossed portion 22. This is because it does not match the embossed portion of B. In addition, the non-embossed area The width of the embossed portion is supported by the embossed portion of the other thin layers 20T and 20B. Absent. Such cellulosic fiber structure 20 is Loses its thickness in packages purchased by consumers and awaiting use.   Referring to FIGS. 7 and 7A, two pressures are applied in the embossing process of the present invention. The force rolls 26T and 28B and the two pattern rolls 28T and 28B are Are juxtaposed so that they are parallel to each other as described above for the embossing process of the prior art. Forming one nip. The protrusion 30 of each pattern roll 28T and 28B is Opposite pattern rolls 28T, such as occurs in a knob-to-knob embossing process Or the protrusion of 28B is not aligned at the nip. Instead, each pattern of nip The protrusion 30 of the roll 28T or 28B is different from the pattern roll 28T or 28 It is in the middle of the B protrusion 30.   However, the distal end 45 of each protrusion 30, as shown in FIG. Roll 28T or 28B or other pattern roll intermediate the proximal end of the protrusion 30 of the roll 28T or 28B. It contacts the periphery of 28T or 28B. In this configuration, each protrusion 30 has each pattern. Make sure that they extend the same distance in the radial direction from the periphery of the roll 28T or 28B. Pattern roll 28T or 28 at the proximal end of protrusion 30 as well as required. It is necessary that the peripheral edge 31 of B be straight and have a constant diameter.   In this configuration, the embossed portion 22 has the protrusions 3 of the top pattern 28T. 0 between the top pattern roll 28T and the top pressure roll 26T . Similarly, the embossed portion 22 is covered with a bottom pattern roll 28B. Between the roll 28B and the bottom pressure roll 26B.   In this configuration, each thin layer 20T and 20B has a pattern roll 28T and It is bonded to the other lamina 20T and 20B at the nip between 28B. Each pattern The protrusions 30 of the roll 28T or 28B are not covered by other thin layers 20T or 20B. Deform the distal end 23 of each embossed portion to the midpoint of the width of the boss region 24. Complete In the manufactured product, each embossed portion 22 has a pattern roll 28T or 28B. Of the proximal end of the protrusion 30 of the protrusion and the protrusion of another pattern roll 28T or 28B By placing thin layers 20T and 20B between 31 and others at this midpoint 25 Adhesively bonded to the thin layer 20T or 20B.   Between the pattern roll 28T or 28B and the pressure roll 26T or 28B The embossed portion of each thin layer 20T or 20B after the embossed portion 22 is formed. 22 is coated with the adhesive from each adhesive applicator roll 32T and 32B. It is. Extends radially outward beyond the non-embossed regions 24 of thin layers 20T and 20B Only the embossed portion 22 that is coated with the adhesive. Because these are glued Regions of lamina 20T and 20B in contact with agent applicator rolls 32T and 32B Because it is only. At each embossed portion of the adhesive between the thin layers 20T and 20B Bonding occurs. Because of the adhesive application and other thin layers 20T and 20B The compression of the lamina 20T and 20B due to adhesive occurs at the embossed portion 22 with the application of adhesive. Because.   If desired, one of the adhesive applicators 32T or 32B may be omitted and the thin layer 2 Apply adhesive only to embossed portion 22 starting from only one of 2T or 22B To do so. As another example, adhesive applicator roll 32T or 32B One of them is the selected embossed portion of each thin layer 20T or 20B in FIG. The adhesive is adapted to be applied only to the minute 22. Cellulos produced as a result The fiber structure 20 is adhesively bonded to both laminae 20T and 20B. The adhesive is not bonded to the boss portion 22 and the other thin layer 20T or 20B. And a boss portion 22.   In the process according to the invention, the adhesive bonding of the thin layers 20T and 20B is embossed. While the portion 22 is maximally deformed so as to cross the virtual center plane P-P, Desirably. The thin layer 2 is placed at a position corresponding to the maximum deformation of the embossed portion 22. By fixing 0T and 20B with an adhesive, the non-intermediate portion of the embossed portion 22 The embossed areas 24 create a quilted appearance.   Referring to FIG. 8, the pattern roll 28T or 28B according to the present invention is Manufactured by a modular structure with various members rather than as a physical structure . The modular pattern roll 28T or 28B is a first plurality that passes through it. It has a cylindrical perforated shell 40 with holes 42. Modular pattern roll 28T or 28B is not necessarily equal to the first plurality of holes 42, and the second compound It has a number of protrusions 30.   Each protrusion 30 is inserted through a hole 42 in a cylindrical perforated shell 40, 0 and the cylindrical perforated shell 40 are held in place by a device that maintains them in a fixed relationship. Fixed to. This means that the protrusion 30 and the cylindrical perforated shell 40 are fixed. And the protrusion 30 can move inward in the radial direction with respect to the cylindrical perforated shell 40. And also prevent tilting in the radial direction.   Referring to FIG. 9, the cylindrical perforated shell 40 is preferably 40 to 50 centimeters. Manufactured to the desired outside diameter with a diameter of 16 inches (16 to 20 inches). Cylindrical The perforated shell 40 is resistant to the stresses presented by the embossing process described herein. Have a sufficient radial thickness, and preferably have a thickness of at least about 0. 5 to about 1. 0 centimeters (0. 2 to 0. 4 inches). Implementation described here In the example, the cylindrical effective shell 40 is approximately 45. 36 cm (17. 8 Outer diameter of 60 inches) and about 43. 79 cm (17. 240 inches) And an inner diameter. Cylindrical perforated shell 40 made from carbon nickel alloy steel Device and equipment well known to those skilled in the art and not described here. Are machined to form a concentric straight line 31 having a constant diameter.   If desired, the inner or outer circumference 31 of the cylindrical perforated shell 40 may be filled with external material. To minimize penetration, resulting in corrosion of pattern roll 28T or 28B Plating, coating or other finishing to reduce   The cylindrical perforated shell 40 is open on at least one side so that the shaft There is a through hole oriented in the line direction, which makes the cylindrical perforated shell 40 hollow. further, Cylindrical perforated shell 40 includes a plurality of radially oriented holes 42. Radial direction The holes 42 facing toward are arranged in a pattern, and the holes are connected to the places corresponding to the pattern. Placed at the desired location on the embossed portion 22 of the resulting cellulosic fiber structure 20. Is done.   The holes 42 of the cylindrical perforated shell 40 are of the desired size and shape and the shape of the holes 42. Influences the size and shape of the protrusion 30 used here. Cylindrical perforated shell The holes 42 in the rule 40 are aligned in the machine direction and transverse to the machine direction to provide adhesive bonding. Staggered in a single direction to obtain the required bond strength for the mating and in-use consumer product To be placed on or in other patterns.   The size and shape of the holes 42 are not critical and each hole of the cylindrical perforated shell 40 is 42 facing radially and properly spaced from adjacent holes 42 Is only needed. Also, make sure that each hole 42 is equally spaced from the adjacent hole 42. However, according to the present invention, two pattern rolls 28T or The hole pattern so that proper alignment between 28B can be reliably achieved. It just needs to be able to repeat the turn.   In the embodiment described here, the hole 42 and the protrusion 30 are 45 ° from the machine direction. In a pattern that faces the direction of about 2. 23 mm (0. (0876 inches) arranged so as to be offset from the next protrusion. Cylindrical The holes 42 in the hole shell are circular, and in the example described herein are approximately 2. 11 Mi Meter (0. 082 inches) in diameter.   Referring again to FIG. 10, the modular pattern rolls 28T and 2 of the present invention. The protrusion 30 used in connection with 8B is at least as stiff as the Rockwell C55. , Preferably one steel cured to at least one Rockwell C60 Manufactured from aluminum components. At least one protrusion 30 is provided on the base of each protrusion 30. There is an annular shoulder 44 surrounding the section. Stitch like 4340 or 52100 Alloys are suitable. It is difficult to control the size of the protrusion 30 during manufacturing, but it is a low grade It is desirable to manufacture the The shank of the protrusion 30 is located at the distal end of the protrusion 30. An annular shoulder 44 and a protrusion at an included angle of about 26 ° as measured from the virtual apex beyond 45. Beveled midway between the distal ends 45 of 30.   The protrusion 30 is sized according to the hole 42 of the cylindrical perforated shell 40. assembly Inside, the protrusion 30 is a hole of the cylindrical perforated shell 40 from the inside of the cylindrical perforated shell 40. Through which the distal end 45 of the protrusion 30 is inserted into the cylindrical perforated shell 40. Extending radially outward from the shoulder 44 of the protrusion 30 of the cylindrical perforated shell 40. It comes into contact with the inner circumference and engages with it.   The shoulder 44 is configured such that the protrusion 30 radially extends out of the hole 42 of the cylindrical perforated shell 40. It cannot pass in the direction of the side and is large enough so that it does not come out during operation. There must be. The shoulder 44 is formed of the hole 42 of the hole 40 of the cylindrical perforated shell 40. At least about 0. Must be 5 millimeters (0.02 inches) larger And at least about 30 mm to prevent protrusion 30 from protruding through the hole. 2. It should have a thickness of 5 millimeters (0.01 inches).   As shown in FIG. 10, the protrusion 30 has a protrusion 30 around its own axis. The knurls 43 are formed to prevent rotation. The protrusion 30 Rank is about 0. 03 mm (0. Mates with 001 inch) jagged 43 I do. This fit maintains the projection 30 and the cylindrical perforated shell 40 in a fixed relationship. Device is attached and the assembly of the pattern roll 28T or 28B is completed. In between, the protrusion 30 is temporarily held in place. If desired, press protrusion 30 Removing the annular shoulder 44 permanently holding it in place by force fit Can be.   In the example described here, two thin layers 20T and 20B and one square mate. About 0. 04 kilograms (26 pounds per 3,000 square feet) And the basis weight presented to the consumer, each layer being approximately 0. 3 mm Meters (0. For use on paper towels with a thickness of 012 inches) , The protrusion 30 is at least about 1. 3 millimeters (0. 050 inches), preferred At least about 1. 8 mm (0. 070 inches) and more preferably , About 2. 0 mm (0. 080 inches), but about 2. 5 mm (0. 100 inch) cylindrical perforated shell 40 extends radially beyond the perimeter 31. It must have a vertical axial length.   Described above to accommodate cellulosic fiber structures with slightly different basis weights and thicknesses It can be seen from the dimensions that slight adjustments are necessary. However, a little By adjusting the above, the device described herein can operate from about 0.01 to about 0. 07 kg (8-40 pounds per 3000 square feet), more preferably 1 square About 0. per meter. 04 to about 0. 05 kilograms (3,000 feet hit Producing a cellulosic fiber structure 20 having a basis weight of 25 to 30 pounds Can be used for   The protrusions 30 of this size are embossed when sufficient deformation of the cellulosic fiber structure 20 is present. What happens in part 22 and the non-embossing of embossed portion 22 and thin layers 20T and 20B. It helps to ensure that there is a clear difference in height between the two parts. This configuration Is about 14. per square centimeter (95 grams square inch). 7 grams Under pressure at least about 1. 0 mm (0. 040 inches) At least measured with a surface contact profilometer under pressure that cannot be determined. About 1 millimeter (0. 04 inch) embossed part 22 and embossed part 22 And a depth between the midpoints 25 of the width between.   Cellulose fiber structure, typically as the thickness increases with large embossing The tensile strength of 20 becomes small. However, this reduction is better than known techniques. It can be relaxed by heating the pattern roll 28.   The distal end 45 of the protrusion 30 has a diameter of about 0. 01 square centimeters (0. 002 square Understand to create an embossed portion 22 having an area of 1 inch) and having the same area I can do it. In the embodiment described herein, the protrusion 30 and its distal end 45 are cut off. The surface is circular and round. However, other cross-sections that are not circular and the protrusion of the distal end 45 It will be appreciated that can also be used with the present invention.   As shown in FIG. 8, the protrusion 30 passes through the hole 42 and the hole of the cylindrical perforated shell 40. Fixed the protrusion 30 and the cylindrical perforated shell 40 after being inserted through 42 A device for holding in relation must be provided. Projection 30 and cylindrical perforated shell The device that holds the ruler 40 in a fixed relationship is under the compressive force present in the manufacturing process. Prevents the protrusion from moving inward in the radial direction. Another pattern roll 28T or 28 at the proximal end of the 8T or 28B protrusion 30 This results in compression of the distal end of protrusion 30 with respect to the perimeter of B.   A preferred device for retaining the protrusion 30 in the cylindrical perforated shell 40 is a radial aperture. It is a building. A radial anvil, like the one used here, is a pattern roll Structure for transmitting radial force through the protrusion 30 to the mounting portion of 28T or 28B Or say the fixed part. As is known in the industry, pattern roll 28T or Or 28B is attached at both ends of its shaft, but can also be a cantilever structure, May be attached by trunnion, other than pattern roll 28T or 28B Of the pattern rolls 28T or 28B parallel to the desired axial direction, position and The pattern roll 28T or 28B is rotated in the axial direction so as to maintain the gap. Journals, bearings, or other devices may be provided so that they can.   As shown in FIG. 8, the cylindrical perforated shell 40 and the protrusion 30 are held in a fixed relationship. One effective example of a radial anvil that provides an effective device to carry is the central Base roll 48 and inner shell 62. Base roll 48 and inside Shells 62 are both concentric with each other and have a constant inner diameter, a constant outer diameter, It has a constant radial thickness.   In order to assemble the above-mentioned members, in the embodiment described here, the inside Shell 62 is approximately 43. 34 cm (17. 063 inch) outer diameter , About 42. 50 centimeters (16. To have an inner diameter of 734 inches) Manufactured. The proximal end or shoulder 44 of the protrusion 30 has a small diameter, especially 4 3. 33 cm (17. Defining a circle having a diameter of There is a pressure fit.   Due to the dimensional difference between the inner shell 62 and the circle defined by the inside of the protrusion 30, Overcoming this interference fit caused by the inner shell 62 to the pattern roll 28T. Or the inner shell 62 is thermally shrunk to aid in assembly into 28B. You. Cooling the inner shell 62 reduces its diameter by the associated heat shrinkage. To get rid of In the examples described herein, at least one of about 77 ° C (170 °). It has been found that the temperature difference of F) is suitable.   After cooling the inner shell 62, it removes the protrusion 30 and the cylindrical perforated shell 40. Inserted in the subassembly having. The inner shell 62 can be warmed to ambient temperature. About 0. 08 millimeters (0. A pressure fit of 003 inches) is formed. This Pressure fit to balance assembly of pattern rolls 28T and 28B The projection 30 is maintained in a fixed relationship with the inner shell.   However, this configuration mounts the pattern rolls 28T and 28B. Therefore, the force applied radially to the protrusion 30 is not properly transmitted. Constant diameter and The thick base roll 48 and the inner shell 62 are joined together by one member There must be.   Combines the base roll 48 and the inner shell 62 to transfer radial load between them One suitable member for doing this is an annular collar. The simple annular collar is It has a constant inner and outer diameter and a constant radial thickness. The ring collar is The dimensions are such that an interference fit is made between the reel 48 and the inner shell 62, and a known hydraulic pressure is applied. Use in between and axially inserted.   The thickness of certain preferred annuli is radially adjustable. Multiple annular collars Suitable for use in this technical field, but radially adjustable and effective use One possible member is the inner fixation assembly 64. The inner fixing assembly 64 It is loosely inserted into the annular space between the base roll 48 and the inner shell 62. , Such an inner fixation assembly for radially expanding the inner fixation assembly 64 Tightened using the axial orientation screw fasteners commonly used in connection with You.   The fixed assembly 64 includes a drive unit, an inner shell 62, and a cylindrical perforated shell 4 To the member of either pattern roll 28T or 28B that is evenly connected to 0. Drive through the base roll 48 without causing harmful angle deformation in the meantime. It must be of sufficient size to transfer the torque from the dynamic unit. Self-mind The inward securing assembly 64 has been found to be advantageous. Because it's modular This is because it is important to maintain concentricity in the pattern roll. New jar Of the series 303 sold by Ringfedel Company of Gee Westwood A self-centering inner fixation assembly 64 of dimensions 340 × 425 is provided in the embodiment described herein. It turned out to be particularly suitable.   A device (not shown) for holding the protrusion 30 and the cylindrical perforated shell 40 in a fixed relationship. One example is a curable resin that fills the inside of the cylindrical perforated shell 40. . This resin has a vertically arranged cylindrical shape with protrusions set from the inside It is poured into the perforated shell 40 in liquid form and cured. Once cured, the resin is solid Around the axis of the body, preventing the protrusion 30 from moving radially inward To prevent it from rotating.   Suitable resins include epoxy type polymers. A particularly suitable resin is a model Sold by Olein Conup, Inc. of New York under Le Number TE-1257 And used with a curing agent of EA-116.   This holds the cylindrical perforated shell 40 and the protrusion 30 in a fixed relationship. When selecting the device, the pattern roll 28T or 28B is the base roll 4 8 for maintaining the protrusion 30 and the cylindrical perforated shell 40 in a fixed relationship The amount of resin needed for is minimized. Defined by the proximal end of the protrusion Installation of hollow or solid cylindrical base roll 48 with slightly smaller diameter So that it is aligned with the center of the cylindrical perforated shell 40 after the protrusion is installed. You.   This resin is poured into the annular space between the base roll 48 and the cylindrical effective shell 40. Get off. This configuration has the advantage of reducing the total amount of resin used, which is , Has a smaller compression coefficient than either the base roll 48 or the cylindrical perforated shell 40. It enables economical manufacturing and is hard against the factors that affect the hardness of the resin after curing. Decrease the sensitivity of activation time.   One advantage to this device is that the protrusions 30 are embedded in resin and The seed grains in the radial direction are reduced from the peripheral edge of the rule 28T or 28B. This embed Adjusts the pattern roll 28T or 28B so that they are closer together. It is thus possible to accommodate and is ensured by the long protrusion 30.   Example of another device for holding cylindrical perforated shell 40 and protrusion 30 in a fixed relationship Is installed through the hole 42 from the inside of the cylindrical perforated shell 40 without using resin. The base used to fill the cylindrical perforated shell 40 with the protrusion 30 resting on it. It is a scroll. In this structure, the outer diameter of the base roll 48 is equal to the protrusion 30. Slightly smaller than the inner diameter defined by the proximal end of the. Then the proximal end of the protrusion 30 Press-fit or tighten to apply a radial compressive stress to the base roll 48. A fit configuration occurs.   The interference fit is advantageously made through thermal shrinkage of the base roll 48. But However, one drawback of this configuration is that the individual parts of the pattern roll 28T or 28B are It is usually difficult to disassemble and reuse the item. So, for example, 1 When two protrusions 30 are destroyed, the destroyed protrusions 30 cannot be replaced. No. (a problem unique to prior art monolithic pattern rolls) 28T or 28B must be discarded. The base roll 48 is cooled, It is inserted into the cylindrical perforated shell 40 in the axial direction until the final dimensions are reached. Can be warmed up to a degree.   If desired, the axial end of the cylindrical perforated shell 40 may be Aligns with another cylindrical perforated shell 40 juxtaposed in an axially adjacent relationship with 0. It is equipped with a device. Pattern rolls 28T or 2 that are juxtaposed in the axial direction and are adjacent to each other The device for aligning the 8B cylindrical perforated shell 40 includes a protrusion across the consumer product. It provides continuity of the aesthetic pattern formed by 30.   This configuration axially couples a plurality of pattern rolls 28T or 28B. Is capable of producing a wide cellulosic fibrous structure 20 during manufacture. be able to. In particular, this makes such a cellulose fiber structure 20 more economical. To contribute to manufacturing.   The cylindrical perforated shell 40 of the pattern roll 28T or 28B is Aligned with other cylindrical perforated shell 40 of continuous pattern roll 28T or 28B One suitable means of doing this is with the irregularity of the axial ends of the cylindrical perforated shell 40. is there.   In particular, the end of the cylindrical perforated shell 40 in the axial direction is provided with a fan-shaped portion as illustrated. And saw-tooth, or saw-tooth or rectangular corrugations. Unfortunate The exact size, shape, distribution and position of the regular parts is a special aesthetic pattern of the protrusion 30. Depends on the service.   If desired, the embossed portion 22 and non-embossed area 2 of the cellulosic fibrous structure 20. Other patterns with pattern rolls 28T and 28B that match the similar pattern of 4 Is manufactured. For example, a continuous non-embossed area 2 of separate embossed portions 22. Instead of 4, the pattern rolls 28T and 28B have a network of continuous protrusions. Have.   This continuous protrusion network provides a cylindrical shell of appropriate radial wall thickness. Formed by drilling blind holes on the outside of the cylindrical shell. This creak The holes are another thin layer 2 of the nip formed by the pattern rolls 28T and 28B. Do not compress the matched areas of each lamina 20T and 20B relative to 0T and 20B. This configuration is a cellulosic material having a continuous embossed portion and a separate non-embossed portion. A fiber structure 20 is produced.   There are various modifications within the scope of the invention, all of which are dependent on the claims. Covered.

Claims (1)

[Claims]   1. A cellulosic fiber structure having opposed outer surfaces, bound in a face-to-face relationship. An inner surface facing the facing lamellas, each having two lamellas joined together. And an opposing outer surface facing away from the center of the cellulose fiber structure. Each said lamina having a non-embossed region and a non-embossed region facing another lamina. A cellulosic fibrous structure having an embossed portion bonded by an adhesive.   2. The embossed portions of the lamina are separated and are adjacent to each of the lamina. The cellulosic fiber structure according to claim 1, wherein the cellulosic fiber structure is separated from the embossed portion.   3. The cell according to claim 2, wherein the non-embossed regions form a continuous network. Lurose fiber structure.   4. The embossed portion is the midpoint of the width of the non-embossed portion between the adjacent joining locations. The cellulosic fiber of claim 3, having a depth of from at least about 1 millimeter. Fiber structure.   5. Two juxtaposed in a relationship parallel to the axial direction so as to form a nip portion therebetween Pattern rolls, each of the pattern rolls is Each of the protrusions is in contact with the peripheral edge of the other pattern roll. A cellulos having a distal end to be touched and sandwiched in the nip between the pattern rolls. The fiber structure is a protrusion of the pattern roll and the periphery of the other pattern roll. An apparatus for producing a dual thin layer cellulosic fiber structure in contact with.   6. The pattern rolls are juxtaposed in parallel with each other in the axial direction, and the nip portion is provided between them. Forming an adhesive applicator roll, the adhesive applicator roll is Contacting the pattern roll at the distal end of the protrusion, the adhesive applicator Cellulose fiber structure arranged at the nip between the roll and each of the pattern rolls. The device of claim 5, wherein the adhesive is applied to selected portions of the structure.   7. The pattern rolls are juxtaposed in parallel with each other in the axial direction, and the nip portion is provided between them. 7. The device of claim 6 having an adhesive applicator roll forming a.   8. Preparing the two thin layers to be joined in a face-to-face relationship,   Two patterns, each with a peripheral edge and a radially oriented protrusion at the distal end Preparing a device having a roll, wherein the pattern roll has a first The pattern rows are juxtaposed in a relationship parallel to the axial direction to form a nip portion. Contacting the distal end of the protrusion of the pattern with the periphery of the other pattern roll,   Advance the lamina through the nip defined by the pattern roll And both lamina to the distal end of the protrusion of the pattern roll and the other pattern roll. Between the circumference of the roll and the thin layer to match the distal end of the protrusion. Face-to-face relationship with bonding and contacting other said lamina at multiple locations A method of making a cellulosic fiber structure that joins two thin layers together.   9. The compression rolls juxtaposed in parallel with the pattern rolls in the axial direction Preparing and forming the second nip portion;   The pattern roll having the second nip portion is arranged in a relationship parallel to the axial direction. Prepare the placed adhesive applicator roll and the adhesive applicator roll Forming a third nip with the pattern roll;   Supplying an adhesive to the applicator roll,   In the second nip formed between the pressure roll and the pattern roll, By advancing the thin layer, the protruding portion of the pattern roll faces the pressure roll. And a step of forming an emboss on the thin layer,   The third nib between the adhesive applicator roll and the pattern roll. Advancing the thin layer through the tape and applying adhesive in a predetermined pattern to the thin layer. Process,   Adhesively bonding the thin layers together to form a cellulosic fiber structure. 9. The method of claim 8, wherein   10. One of them is juxtaposed in a relationship parallel to the pattern roll in the axial direction, and Preparing two pressure rollers forming a nip between them;   One of them is juxtaposed with the pattern roll in a relationship parallel to the axial direction, and the nibet Preparing two adhesive applicator rollers that form the   Supplying an adhesive to each of the applicator rolls, the pressure rolls and others Advancing the lamina into the second nip formed between the pattern roll of The protrusion of the pattern roll against the pressure roll in the thin layer. Forming a boss,   The nip portion between the adhesive applicator roll and the pattern roll Advancing the thin layer through and applying an adhesive to the thin layer in a predetermined pattern. When,   10. Adhesive bonding of each said embossed portion to another said thin layer. The method described in.   11. A cellulosic fiber structure produced by the method of claim 8.   12. A cellulosic fiber structure produced by the method of claim 9.   13. A cellulosic fiber structure produced by the method of claim 10.   14． A non-embossed region and a portion projecting radially outward from the non-embossed region A first thin layer having an embossed portion,   A non-embossed region and an embossing protruding radially outward from the non-embossed region A first thin layer having a portion of the at least one thin layer. A second lamina coupled to the non-embossed region of the other lamina;   An imaginary center plane that divides the void between the non-embossed regions in the middle of the lamina. And the embossed portion from each lamina traverses the median plane and is a facing feature. A cellulosic fiber structure having two thin layers bonded together.   15. A plurality of said embossed portions of each said lamina have a compressed distal end that 15. The cellulosic fibrous structure of claim 14 bonded to a thin layer.