Abstract: A sewing method to form a trim cover assembly for automotive seat, and an automotive seat using the trim cover assembly. Firstly, a first cover material, a second cover material and a backing tape are used and juxtaposed on one another, with their ends aligned with one another, and then sewn together to create a first seam and a sewn connection portion. Such sewn connection portion is cut off into a shortened sewn connection portion. Thereafter, the first cover material and backing tape are turned over relative to the shortened connection portion and sewn together, thereby forming one portion of the trim cover assembly. Another portion of the trim cover assembly may be formed by avoiding use of the backing tape and simply turning over the first cover material relative to the sewn connection portion, and sewing together the thus-turned portions of the first cover material.

Abstract: A method for sewing together covering elements is provided, in which two first threads and a second thread are used in a sewing machine having sewing needle means. In operating the sewing machine, the covering elements are fed at a given feeding pitch, such that the two first threads are entwined about the second thread in each of needle holes formed by the sewing needle means in the covering elements. Those entwined three threads fill and close the needle hole, thereby preventing leakage of a liquid foaming agent at a foaming process for forming a foamed product integral with the covering elements. The sewing needle means may comprise one sewing needle, in which case, both two first threads are used in that one sewing needle, or alternatively may comprises two sewing needles, in which case, the two first sewing threads are respectively used in the two sewing needles.

Abstract: A method and mechanism for free form sewing in which the workpiece is being sewn on a sewing machine having a plastic sheet or panel secured to the sewing machine work surface which has a coefficient of friction in any of several ranges which are all considered to be low friction coefficients. Depending upon the plastic material used, the coefficient of friction of any particular material may be in the range of 0.02 to 0.20, or in smaller ranges of coefficients of friction. The objective in using the method or mechanism is to permit the workpiece being sewn by free form sewing to be moved more easily with less frictional resistance by the hands of the sewing machine operator. Various plastics usable include various types of Teflon.

Abstract: Trim with decorative double lipped fastening structure comprising a first set of threads folded near a midpoint and knotted together providing a knot near a midpoint of the threads with a fringe end and a folded end on opposite sides of the knot. A second set of threads adjacent the first set of threads is similarly folded and knotted. A lip is provided by a cross stitching connecting the folded ends of the first and second set of threads side by side. A second lip of thread having a plurality of folds folded to length equal to the length of the folded ends of the first and second set of threads are held together by a cross stitching. An end of the second lip is fastened adjacent the first and second knots by a cross stitching providing a bottom of a fastening channel of uniform depth.

Abstract: A textile fabric comprising a plurality of pieces of fabric material cut into strips, which are then placed adjacent to one another and interlaced. The interlaced strips are situated transverse of one another and allow for overlapping edges. Recessed from these edges along a generally parallel line are rows of stitching employed to join the pieces of fabric. The result enables the appearance of a simulated patchwork design.

Abstract: An automatic border sewing system having a pre-feed assembly for feeding a length of material for forming a mattress border. A feed and cut assembly feeds the border material into a sewing station for forming mitered corners in the border material and thereafter cuts the border material to form a border of a desired length. The mitered border is moved to a closer station for closing the leading and trailing edges of the border.

Abstract: The order in which panels 13 are to be quilted, the amount of quilting-induced shrinkage, and the amount of crop between adjacent panels 13 are stored in a machine readable file 13 for use in operating a print line 10. Such information 13 is printed or otherwise placed on the material 11 at the print line 10 so as to be readable by a sensor 22 at a quilting station, where the information 13 is read and used to control the quilter 21. Panels 15 are quilted according to a schedule and in batches in the most efficient manner, and panels are cut according to information read from records on the material. Shrinkage is compensated for and appropriate crops are made between panels. The printing line prints series of panels on a web 11 in rolls 14 that can be fed, last-printed panel first, into the quilter.

Abstract: A quilting apparatus and method for guiding a sewing machine relative to at least one layer of fabric is disclosed. The apparatus may include an adjustable quilting frame and a carriage assembly that supports the sewing machine. The quilting frame is mounted relative to a working surface and retains one or more fabric layers in a substantially planar orientation. The carriage assembly includes lower and upper carriage components that cooperate to transport the sewing machine in lateral and longitudinal directions with respect to the quilting frame. The quilting frame includes support members acting as spools to retain the fabric layers and having locking mechanisms for maintaining tension in the fabric layers. The support members have an adjustable length to accommodate various fabric sizes and to accommodate the arbitrary dimensions of the working surface. The height of the quilting frame may also be adjusted by a height adjustment assembly.

Abstract: A modular material supply system for an automated quilting machine having a variety of fill material supply devices, a cover material tick magazine, a fill laminator, and optionally a digital printer. The system is capable of selecting the desired cover and fill materials and supplying them continuously to a laminator to form a layered material, which is then fed to the quilting machine. The flexibility of the modular system reduces the need for system downtime to changeover component materials for producing different quilted products.

Abstract: The invention relates to a device for feeding curtain hooks, which each consists of a strip and a hook part connected thereto, to a sewing machine which can sew the strip of a supplied curtain hook to a curtain, comprising: a supply holder for the curtain hooks, displacing means for displacing one curtain hook at a time in a straight line to a desired position for sewing on the strip, and adjusting means for automatically adjusting the mutual position of strip and hook part connected thereto. The invention also relates to a method for feeding curtain hooks.

Abstract: An apparatus is provided for feeding and slitting mattress covers, quilts and other soft goods supported on a table. The apparatus has a first slitting wheel rotatable by a motor. A second slitting wheel is rotatable by the motor and contacts the first slitting wheel to provide a cutting action. The apparatus further includes upper and lower conveyors operable by the motor for conveying the soft goods past the slitting wheels. The upper conveyor is resiliently vertically movable and applies a compression force against the soft goods as they are moved between the upper and lower conveyors and past the slitting wheels.

Abstract: Support members are mounted to move between two separations, respectively less than and greater than the open end of a two-panel cover otherwise seamed together around its edges. Flaps sized to define a desired closure hemm can be in-turned manually along short opposed portions of the panel ends and then positioned over the lesser spaced support members to mount the cover thereon. The support members when at the greater separation will tension the open panel edges and extend the flaps accurately in-folded between the support members. The support members can have a first size defining a large edge opening for receiving a nozzle suited for blowing unwanted materials from between the flaps, and a smaller size for minimally gapping the flaps. A sewing machine can then automatically stitch through the panels and hidden flaps, for closing the cover end edge. Clamps can grip spaced cover locations for added cover support.

Abstract: A device for compactly holding a large quilt during the sewing phase of the quilt-making operation including a three-sided frame having spaced-apart side members, each the side member of terminal length and attached to a single, common cross-member, the frame adapted to enter into close juxtaposition or nesting arrangement with the free arm of a portable sewing machine, a quilt-holding fitting extending from each terminal end of each side member for holding opposed, curled portions of the quilt apart from each other to create a wrinkle-free, planar work area of the quilt therebetween, and a plurality of wheels for moving the frame over a small support surface, such as a card table, to allow machine

Abstract: A clamping system for a sewing machine used to sew first and second materials together. The clamping system has a plurality of clamps mounted adjacent an opening in a frame. Each of the clamps has a stationary member, a movable member and an actuator. The actuator is connected to the movable member and operates to move the movable member in a clamping relationship with the stationary member to clamp the first material in the clamp. The clamp is powered by a cylinder with a linear stroke, and the clamp has a driving member that transfers the linear motion of the cylinder into a pivoting motion of the movable member. Further, the movable and fixed members have forward ends shaped so that they hold the first material but do not interfere with a sewing of the first member to the second member.

Abstract: A clamping system for a sewing machine used to sew first and second materials together. The clamping system has a plurality of clamps mounted adjacent an opening in a frame. Each of the clamps has a stationary member, a movable member and an actuator. The actuator is connected to the movable member and operates to move the movable member in a clamping relationship with the stationary member to clamp the first material in the clamp. The clamp is powered by a cylinder with a linear stroke, and the clamp has a driving member that transfers the linear motion of the cylinder into a pivoting motion of the movable member. Further, the movable and fixed members have forward ends shaped so that they hold the first material but do not interfere with a sewing of the first member to the second member.

Abstract: In a method of sewing at least one supplementary part on a workpiece, a workpiece identification is fed into a computer and a program is activated thereby, which indicates, on the display screen, the respective supplementary part that is to be sewn on next, and which permits a sewing operation only when the supplementary part is placed on in a correct arrangement and, possibly, in the correct position on the workpiece.

Abstract: A machine readable file is prepared for use in operating a print line that produces a layer of material having a series of panels printed thereon for quilting. The file includes information on the order in which panels are to be quilted, the amount of shrinkage that will occur to a panel during quilting and the amount of crop to be made between adjacent panels following quilting. Such information is placed, preferably printed, onto the material at the print line. Such information is readable by a sensor at a quilting station, which reads the information and controls a quilter to quilt in accordance with the information. Panels are then quilted in accordance with a schedule and in batches in a most efficient manner. A panel cutter is also controlled by information read from records on the material. Shrinkage is also compensated for and appropriate crops are made between panels.

Abstract: An apparatus is provided for feeding and slitting mattress covers, quilts and other soft goods supported on a table. The apparatus has a first slitting wheel rotatable by a motor. A second slitting wheel is rotatable by the motor and contacts the first slitting wheel to provide a cutting action. The apparatus further includes upper and lower conveyors operable by the motor for conveying the soft goods past the slitting wheels. The upper conveyor is resiliently vertically movable and applies a compression force against the soft goods as they are moved between the upper and lower conveyors and past the slitting wheels.

Abstract: The conformal thermal insulating blanket may have generally rigid batting material covered by an outer insulating layer formed of a high temperature resistant woven ceramic material and an inner insulating layer formed of a woven ceramic fiber material. The batting and insulating layers may be fastened together by sewing or stitching using an outer mold layer thread fabricated of a high temperature resistant material and an inner mold layer thread of a ceramic fiber material. The batting may be formed to a composite structure that may have a firmness factor sufficient to inhibit a pillowing effect after the stitching to not more than 0.03 inch. The outer insulating layer and an upper portion of the batting adjacent the outer insulating layer may be impregnated with a ceramic coating material.

Abstract: A product such as a joint of meat is encapsulated in a cut length of a continuous sleeve of elasticated netting. A seam has been sewn along the sleeve offset from its centre so that the cut length has a lateral projection which will not become embedded in the product during cooking and can be used in handling the hot product. Preferably the seam is sewn using stitches which will unravel when one end of the yarn is pulled to facilitate stripping the sleeve from the product.

Abstract: This invention relates to a blanket having a slit through which a person's feet may protrude. The blanket is designed for singles, couples or multiple persons sharing a blanket. The individuals sharing the same blanket can protrude their feet or keep them inside the blanket. The slit is not just a plain opening or cut across the top surface of the blanket but rather, the slit is designed to form an opening that looks like a pocket with an open or unsewn bottom.

Abstract: A stuffed toy formed by providing stuffable toy shell having several fabric members fastened together, thereby defining a container which encloses an interior chamber and which has an exterior surface defining a shape of a toy. The container has an opening which extends through the container material, and is in communication with the interior chamber. A drawstring is stitched around the opening such that the drawstring may be tightened to thereby close the opening. After inserting a stuffing material into the interior chamber of the container through the opening, the drawstring is tightened to close the opening and retain the stuffing in the interior chamber of the container. The closed may opening form a puckered seam which resembles a navel, a scar or other characteristic feature in appearance. The method is generically applicable to doll making.

Abstract: In the proces of defining quilted fabric, non-stretchable, stretchable and interior layers of materials are wound on separate rollers. Then the layers are positively fed from the rollers to a bi-directional acting sewing assembly wherein the non-stretchable layer is provided with zero elongation and the stretchable layer is provided with 25 to 300 percent stretch. Next, the arranged layers are sewn in sets of sinusoidal-like seam patterns. Finally the stretched layer is permitted to relax to a natural state wherein a series of puffs are formed in rows across the layer normal to stretch direction of the stretchable layer. Result: columns of puffs of even numbered rows are aligned with each other but are laterally offset with respect to puffs of odd numbered rows by a constant amount.

Abstract: A detachable cover for a window blind is disclosed. The detachable cover can be a sleeve which may be attached by a first attachment device such as velcro to a second attachment device of a vertical window blind which may also have velcro. The sleeve may have a top, bottom, and two sides and may have an opening at the top for sliding onto the blind and may be substantially closed at the bottom and two sides. The first attachment device on the sleeve may be a ring of material located near the top of the sleeve. The second attachment device may also be an elongated strip fixed to the vertical blind so that the elongated strip runs from about the top of the vertical blind to about the bottom of the vertical blind and lies substantially in the middle of the vertical blind.

Abstract: Method for forming a foamed product integral with trim cover assembly, in which a foam padding piece and a surface cover piece are formed such that the former is small in size relative to the latter. According to the method, the peripheral ends of the foam padding piece are aligned and sewn with the peripheral ends of the surface cover piece to form a cover section. A plurality of such cover sections are provided and are bent at their respective end portions, stretching each surface cover piece on and over each foam padding piece, after which, the thus-bend end portions of cover sections are sewn with one another to form a three-dimensional trim cover assembly. A liquid foaming material is injected and cured in that trim cover assembly to form a foamed product integral with the trim cover assembly.

Abstract: A reinforcement liner and methods of manufacturing the liner are disclosed. The liner includes a fabric (100) material having first and second fibers (112, 122). The second fibers comprise chopped fibers in substantially parallel alignment for being positioned substantially about the circumference of a pipe, so the fabric can be elongated in a direction parallel to the second fibers. The liner may includes a stitching material (130) that is used to couple the first and second fibers together. The stitching material is preferably an elastic yarn.

Abstract: A quilting machine (10,100, 200, 300, 400, 500, 600) is provided with a printing station (20, 125, 225, 325, 425, 525, 611, 626, 631) and a quilting station (44, 127, 227, 327, 427, 527, 627, 632). A master batch controller (90, 135, 235, 335, 435, 535) assures that the proper combinations of printed and quilted patterns are combined to allow small quantities of different quilted products to be produced automatically along a material web. Ticking is preprinted with a plurality of different patterns, organized and communicated by the computer so that a print head can scan the material and print different patterns of different panels (32) across the width of a web. Identifying data (40) for matching the panels of a mattress product can be provided in data files printed on the fabric.

Abstract: A curtain for a dock shelter that is easily assembled alone and as part of a dock shelter. The curtain includes a sheet that has a pocket mounted thereon. The pocket is adapted to receive a flexible stay and include a slit that inhibits movement of the stay within the pocket. In another aspect, the invention relates to a method of making a curtain. The method includes the steps of securing a pocket to a sheet; forming a slit in the pocket (e.g., by cutting the pocket); inserting a flexible stay into the pocket; and positioning the stay adjacent to the slit. The invention also relates to a method of making a vehicle shelter and mounting the shelter to a loading dock. The method includes the steps of mounting a frame to the loading dock; securing a pocket to a curtain; forming slits in the pocket; inserting a stay in the pocket adjacent to the slit; and placing the curtain against the frame.

Abstract: Flexible strap is passed around an elongated portion 11 of load-bearing hardware 10, and the two ends 2, 3 of the strap are overlapped, held in a curve, and stitched together. The overlapped strap portion is then centered around the elongated hardware portion and is formed into an eye that retains the elongated hardware portion. The eye is closed by stitching through all four strap layers of the strap extending from both sides of the hardware portion. A confluence wrap 5 is preferably wrapped around the eye closure area before this stitching. Preferably a nylon buffer is placed in the eye between the hardware and strap, and stitched in the eye closure area, to prevent chafing of the strap on the hardware. The curvature sewn into the overlapped strap ends provides even distribution of stress on the two ends when a load is placed on the hardware.

Abstract: It is determined whether a quilt design is applicable to paper piecing by determining whether all pieces of the quilt design are finally separated by separating each piece one after another by one straight demarcation line. When it is determined that the quilt design is applicable to paper piecing, demarcation lines that do not intersect other demarcation lines and that divide the quilt design into two blocks that each include a plurality of the pieces are selected. The quilt design is modified by extending the arbitrarily selected demarcation line, and deleting all demarcation lines that exist in one of blocks divided by the extended demarcation line.

Abstract: An integrally tufted reversible sculptured rug comprising: a first layer of material having a cut tufted first pile yarn forming on one side of the material a non-sculptured rug surface, the other side of the material being the back side, a second layer of material positioned against the back side of the first material, and a second pile yarn tufted through both the second and first layers of material fixing the two layers of material together and forming a sculptured surface on the second layer of material, said second pile yarn being loop-cut in different heights according to a predetermined pattern.

Abstract: The present invention provides a continuous process for the manufacture of a garment. A web of fabric including opposing web side edges is provided. The web of fabric is intermittently cut, thereby forming edges defining neck openings in the web of fabric. The opposing web side edges of the web of fabric are intermittently cut, thereby defining pairs of opposing indentations in the opposing web side edges of the web of fabric. The web of fabric is cut, thereby defining discrete garment-sized pieces. Each of the discrete garment-sized pieces of the web of fabric includes at least one neck opening, a front panel having a pair of opposing garment side edges, a back panel having a pair of opposing garment side edges, a portion of two pairs of the opposing indentations in the web side edges of the web of fabric, a pair of sleeve flaps, two garment end portions, and a pair of opposing piece side edges. The opposing piece side edges are proximate a pair of opposing garment bottom edges of the garment.

Abstract: The present invention provides a continuous process for the manufacture of a garment. A web of fabric including opposing web side edges wherein one of the opposing web side edges is proximate the garment bottom edge of the garment is provided. The web of fabric is cut, thereby forming a fabric web wherein the fabric web includes one of the opposing web side edges opposed to an octagonal shape pattern defining pairs of shoulder side edges having a side edge located between the shoulder side edges of each pair of the shoulder side edges and edges located between the pairs of shoulder side edges. The side edges of the fabric web are cut, thereby forming edges defining neck openings in the fabric web. The fabric web is cut, thereby defining discrete garment-sized pieces wherein each of the discrete garment-sized pieces of the fabric web includes at least one neck opening, a front panel having a pair of opposing garment side edges, a garment end portion, and a bottom edge.

Abstract: The present invention provides a continuous process for the manufacture of a garment. A web of fabric including opposing web side edges wherein the opposing web side edges are proximate a pair of opposing garment bottom edges of the garment is provided. The web of fabric is intermittently cut, thereby forming edges defining neck openings in the web fabric. The web of fabric is cut, thereby defining discrete garment-sized pieces. Each of the discrete garment-sized pieces of the web of fabric includes at least one neck opening, a front panel having a pair of opposing garment side edges, a back panel having a pair of opposing garment side edges, two opposing garment end portions, and the pair of opposing bottom end edges. The discrete garment-sized piece of the web of fabric is folded, whereby one of the garment bottom edges of the pair of opposing garment bottom edges is brought into contact with the other garment bottom edge.

Abstract: A quilting machine (10, 100, 200, 300, 400, 500, 600) is provided with a printing station (20, 125, 225, 325, 425, 525, 611, 626, 631) and a quilting station (44, 127, 227, 327, 427, 527, 627, 632). The printing station is located either in line and preferably upstream of the quilting station, with a conveyor (520) extending through each of the stations to convey a web of quilting material through the machine, or is off of the quilting line such that the material with a pre-applied pattern thereon is transferred, preferably in web form, to the line of the second station for the application of a pattern in registration with the first applied pattern. At the quilting station, registration longitudinal and transverse registration is measured and skewing or rotation of the material is determined. Opposite transverse sides of the material are differently adjusted to orient and register the material.

Abstract: The present invention is generally directed to a method of making a lined fabric product having an open hem construction. An open hem construction refers to a lined fabric product in which a liner fabric is hemmed separately from a cover fabric. In this configuration, the liner fabric is allowed to drape independently from the cover fabric. In the past, fabric articles, such as curtains and draperies, having an open hem construction were primarily made exclusively by hand. The process of the present invention, on the other hand, allows some automation, improving the speed and cost at which the products are made.

Abstract: A sewn cover assembly of a type that is to undergo a foaming process involving injection and curing of a liquid foaming material therein. The cover assembly is formed by sewing together plural cover elements via two different sewing threads, using a sewing machine, so as to completely close and seal the needle holes formed therein against leakage of the liquid foaming material through the needle holes. Namely, one of the two threads used is large in thickness relative to another of them, thereby serving as a leakage preventive member in addition to being a sewing thread. A foamed product is also disclosed, which is formed by injecting and curing a liquid foaming material in such sewn cover assembly.

Abstract: An apparatus for removing a thread tail from a hole in a presser foot on a quilting machine. The apparatus has an orifice providing a stream of pressurized air that applies a force against a section of the thread tail extending between the needle and the hole in the presser foot. The pressurized air stream pulls the thread tail through the hole in the presser foot and gathers the thread tail on an upper side of the presser foot. In another embodiment, the present invention includes a method of automatically applying a generally transverse force to a portion of the thread tail extending between the needle and the hole in the presser foot for a duration sufficient to remove the thread tail from the hole in the presser foot.

Abstract: Ticking for the production of mattress covers is preprinted with a plurality of different patterns by a computer controlled printer that prints in response to pattern data communicated from a control computer. The pattern data is organized and communicated by the computer so that a print head, for example, can scan the ticking material, such as in rows across the width of a web, and print different patterns. For example, different border panels can be oriented along a web and positioned side-by-side across a web and each printed with a different pattern. Top and bottom panels having corresponding patterns can be printed on the same or a different web. Identifying data for matching the panels of a mattress product can be provided in data files in the same or a different computer or can be printed on the fabric along with the patterns on the panels.

Abstract: A quilting system that includes a multiple needle quilting machine is provided with batch processing capability by the addition of a panel cutter in-line with and downstream of the quilting machine. The panel cutter is equipped with a programmed controller that is loaded with batch information for the production, on the quilting machine, of a plurality of quilts by stitching patterns on a multilayered web of fabric. The batch information includes information of a number of quilts to be quilted as well as the patterns to be quilted on each quilt and the composition of the material on which the patterns are to be quilted. Information is derived by the panel cutter controller from sensors on the panel cutter, which information is used to control the quilting machine by adjusting the length of quilted material from the quilter.

Abstract: A fitted crib safety sheet for positioning over a crib mattress is made with a rectangular portion sized to fit over the top of the mattress. Side skirts are positioned on each side of the rectangular portion, and are sized to extend both down from the rectangular portion adjacent the sides of the mattress and then underneath the mattress. End flaps are positioned at each end of the rectangular portion, and are sized to not only extend down sides of the mattress but also to extend beneath the mattress. Corners of the sheet are sewn to conform to the corners of the mattress. A wide elastic strip is sewn to each end flap along the lateral width of the end flap. Then a narrow elastic strip is sewn to each side skirt along the longitudinal length of the side skirt and also sewn to the wide elastic stip.

Abstract: A method is provided for hand stitching a multi-panel sports ball.

Abstract: An expandable sleeping bag comprising a modified draft tube design incorporating a draft tube expansion segment and expansion zipper which are used to expand the circumferential measurement of the sleeping bag's inner lining and outer shell.

Abstract: An apparatus and method are provided for converting one or more rolls of material into a pillow sham. In one embodiment, three rolls of material are overlapped and fed to a sewing and cutting system. The materials are sewn along their vertical edges and then cut to a determined size. After being cut, the three pieces of fabric are shifted and fed to further sewing heads for sewing the horizontal edges in producing a pillow sham. In an alternative embodiment of the invention, the system converts a single roll of material into a pillow sham.

Abstract: An elongated substantially rectangular nylon 6,6 air bag blank which allows an operator to produce a one piece air bag with four straight seams without undue manipulation during production thereof. The blank has notches in the two upper corners with an elongated notch centrally between the notches in the corners thereof in the long side of the blank.

Abstract: A quilting machine is provided having at least one set of single needle stitch forming elements for forming chain stitched patterns on a thick multilayered material such as a mattress cover. The machine is preferably web-fed, with a panel of the continuous web being clamped and held stationary on a frame. The stitch forming elements include a needle and a looper mounted on separate heads that are independently moveable on a bridge transversely relative to the panel, which is moveable longitudinally relative to the frame. The bridge is longitudinally moved by a servo and the heads are transversely moved on the bridge by separate servos. The stitching elements on each head are driven by separate servos. A controller drives the servos to chain stitch patterns and differentially move the heads transversely to account for transverse needle deflection. The drives of the needle and looper are phased to compensate for longitudinal needle deflection. The controller determines or predicts needle deflection.

Abstract: A method of producing fabric covers (19) is disclosed, in particular duvet covers or pillow cases, in which a length of fabric (7) with two longitudinal edges (10, 11) and two transverse edges (8, 9) is laid out flat, the opposing parts (14, 15) of a hook-and-loop tape then being fixed respectively to the two transverse edges (8, 9) at least in strips. The two transverse edges (8, 9) are then brought to lie against one another, the opposing parts (14, 15) of the hook-and-loop tape being aligned, and the superimposed areas of the two longitudinal edges (10, 12) are sewn together by means of ornamental seams (17, 18).