FABRIC-STRENGTHENED VOLUME FOR THE TRANSPORT OF FOOD

06-11-2000 дата публикации
Номер:
AT00037728894T
Принадлежит:
Контакты:
Номер заявки: 75-95-0401
Дата заявки: 18-08-2004

[1]

The present invention relates to composite webs fabric-strengthened bands and in particular for the transport of food being processed.

[2]

It is customary, in processing food situated on conveyor belts to convey, the polymeric materials, such as elastomeric polymeric materials, contain. In some cases, the conveyor belts consist of woven fabrics, coated or laminated with the polymeric material are. In other cases, the conveyor belts consist of solid webs of the polymeric material, the reinforced with tissues are not.

[3]

For a conveyor belt, the is produced from a woven fabric, coated or laminated with polymeric material, an advantage is that the substantially prevents material corpus a stretching of said belt. On the other hand a disadvantage is that the exposed fabric to the cut side edges of the strip may contain liquids capable of absorbing, the harmful microorganisms. Therefore it is customary, the cut side edges of the fabric-reinforced strip material is used for the transport of the food being processed to seal absorbing, , so that the cut side edges no liquids. The material is used for edge-seal, must be sufficiently thick and abrasion resistant, so that it is worn over an appropriate period not. Regarding such edge sealing materials is well known, to extend from their bands solve, what is of disadvantage, since the dissolved pieces in processing may contaminate food situated.

[4]

In a conveyor belt, from a solid web of polymeric material, the absorb fabric-strengthened is not, advantageously no edge-sealing is necessary, since the cut lateral edges of the band no liquids. Bands of this type, however, can expand adversely, since they are not fabric-strengthened.

[5]

Therefore a need exists in the art to an improved material, and then cut to a suitable width in the a food processing machine or the like can be used as a conveyor belt, without having to seal the cut side edge or edges-, and without excessive elongation of the strip.

Brief description of the invention

[6]

One aspect of the present invention is to provide an improved composite web, and then cut into a proper width for a food processing machine or the like can be used as a conveyor belt, preferably without having to seal the cut side edge or edges, and preferably without excessive elongation of the strip.

[7]

[...] & Nkulengu rail; an aspect of the present invention a woven fabric contains a composite web is at least partially embedded in a polymeric web. The fabric imposes, in an advantageous manner the elongation of the composite web a. As longitudinally extending warp threads and laterally extending contains additional advantage the fabric weft threads, wherein one or more pairs of substantially spaced, but still adjacent warp threads are present. For each pair the two warp threads are removed with sufficient distance from each other, so that the composite web longitudinally slotted or at a position between the warp yarns can be cut and slotted or away from them, can be used to provide one or more longitudinal sections of the composite web, the as conveyor belts. Preferably, the warp threads, and are situated on the cut side edges or the upper and lower surfaces of the sections of the composite web not free. Therefore the sections can advantageously for conveying of food products in the composite web in a food processing machine or the like are used, without having to seal (n) () n the cut side edge.

[8]

[...] & Nkulengu rail; an aspect of the present invention lie on the cut side edges of the sections of the composite web freely the weft threads. The weft threads are advantageously polyester monofilament yarns but preferably and is preferably substantially free of unfilled cavities and the composite web. Therefore the cut side edges are sealed advantageously preferably no liquids and must not absorb.

[9]

[...] & Nkulengu rail; any one aspect of the present invention, the warp threads on one or more, longitudinally extending regions with warp threads of the composite web limited, and each cutting the composite web in the longitudinal direction preferably occurs in one or more, longitudinally extending portions without warp threads of the composite web. The areas without warp threads no warp threads contain the composite web. It is preferably that more of the areas without warp threads and are arranged in a laterally extending series with warp threads of the composite web, are provided so that more bodies or a possible longitudinal section. The areas without warp threads have preferably in each case a lateral width, sufficient gro & Nkulengu rail; is, so that long sections of the composite material can be cut longitudinally/slotted, to cut into one of the warp threads and so pushes without expose.

[10]

In a version of the present invention contains only one warp thread and in other versions with warp threads each region contains each region with warp threads two, three or more warp threads. It is preferably that the distance between adjacent warp threads, these appear in the same range with warp threads is less than the lateral width of the areas without warp threads.

[11]

[...] & Nkulengu rail; any one aspect of the present invention fuse all or some of the weft yarns, or at least portions of some or all of the weft threads, with the polymeric web. Although for all embodiments of the present invention is preferably that the cut edges of the composite web are substantially for liquid impermeable, such a degree of impermeability can be strengthened with the fusing the weft threads and the polymeric web. The wherein & Nkulengu rail; t, according to & Nkulengu rail; any one aspect of the present invention, the cut side edges substantially for liquid impermeable and/or on the cut side edges and/or the cut side edges are substantially no weft yarns appear homogeneously.

[12]

And some of the other aspects of the present invention are in the preceding described subsequently.

Brief Description of Drawings

[13]

The invention has been described in general terms, then thus After is now to the attached drawings taken relative, which do not necessarily ma & Nkulengu rail; staff-faithfully are, of which:

  1. Figure 1 is a schematic of a conveyor system according to the 1 side tear State of the Art shows an exemplary embodiment of the present invention and Figure characteristics;
  2. Figure 2 is a fragmentary plan view from above on the composite web, the can be cut into sections, the show are used instead of the conveyor belt of Figure 1 and produced continuously, wherein the longitudinally extending areas without phantom lines schematically and with warp threads of the composite web, and the original, longitudinally extending side edges of the composite web already according to & Nkulengu rail; the exemplary embodiment of the present invention have been cut off;
  3. Figure 3 is a fragmentary plan view from above on the composite web of Figure 2, wherein a part of a polymeric web of the composite web is removed, to show an embedded tissue of the composite web expose, wherein phantom lines schematically the areas without and with warp threads;
  4. Figure 4 a vertical section of a portion of a longitudinally extending side edge of the composite web 2 is of Figure;
  5. Figure 5 a vertical section of a portion of a longitudinally extending terminal edge of the composite web 2 is of Figure;
  6. Figure 6 an isolated, schematic, substantially [...] & Nkulengu rail; [...] view of a part of the fabric of Figure 3 is;
  7. Figure 7 schematically Devices and methods for forming the composite web of Figure 2 and for forming endless portions of the composite web (e.g. endless belt conveyors) according to & Nkulengu rail; the exemplary embodiment of the present invention shows; and
  8. Figure 8 schematically a step of cutting/separating portions of the composite web in the longitudinal direction according to & Nkulengu rail; the exemplary embodiment of the present invention shows.

Detailed description of the invention

[14]

The present inventions are now described in more detail with reference to the attached drawings in the sequence, in which some, but not all embodiments of the inventions are shown. These inventions may be embodied in many different forms and should in fact not be limited to the embodiments, the here are set forth; rather, these embodiments are provided such that these requirements are met by valid legal disclosure. Identical reference numbers refer to same elements throughout.

[15]

Figure 1 is a schematic of a conveyor system 20 according to the 1 State of the Art side tear of parts and an exemplary embodiment of the present invention shows some of the features Figure. The conveyor system 22 includes an endless conveyor belt 20, the runs around a plurality of rollers 24,26 are attached to a frame and rotatably bear which the conveyor belt. The conveyor belt is endlessly 22, since opposite ends of the band are connected at a junction, the note has preferably the form of a the connection & Nkulengu rail ;. As in Figure 1 represented, the conveyor belt 22 is driven is driven by one of the rollers 24. One or more of the rollers 24 are driven, for example by a drive belt 28,30 by a motor is fixed to the frame 26. Numerous other types of driving mechanisms for the conveyor belt 22 is also in the scope of the present invention. As in Figure 1 represented, carries said upper run of the band 32 or the like transports food /. The conveyor system 20 is preferably a part of a food processing machine, the is used for processing the food 32.

[16]

With reference to the plan view from above of Figure 2 a aspect is of the present invention an improved composite web 34,36 in a favorable manner in the longitudinal direction (Figure 7 and 8) can be cut into sections, the (Figure 7) may be formed to endless belts 38. The endless belts 38 can be used instead of the conveyor belt 22 of Figure 1, such as for carrying/transporting food 32 or the like to be processed. It is preferably that each such longitudinal section of the composite web 34 within the longitudinally extending areas without warp threads 40 (e.g. in areas, which do not contain warp threads) extends and not in longitudinally extending regions with warp threads 42 (e.g. in areas, the warp threads contain). The areas 40,42, are arranged in a laterally extending series, are shown schematically in Figure 2 by phantom lines. For the art should be obvious that the imaginary lines are phantom lines, are formed by two short Strokes and a longer stroke alternately.

[17]

In Figure 2 is shown broken in the middle 34 The composite web to show that it may have various different lengths and that they may have various different widths also, wherein the length preferably a multiple larger & Nkulengu rail; it is as the width. In particular, preferably that the composite web 34 into lengths of many Fu & Nkulengu rail; Establishing, such as, for example, hundred Fu & Nkulengu rail; or more or a thousand Fu & Nkulengu rail; or more, without being reduced to thereon. [...] & Nkulengu rail; the exemplary embodiment of the present invention can the width of the composite web 34, the the distance between side edges 52 of the composite web/polymeric web 46 is, Fu seven & Nkulengu rail; or be somewhat less, although many other widths are also acceptable.

[18]

As best with reference to Figure 3 can be seen, the composite web 44 contains a fabric 34, and is preferably substantially from this, which preferably is at least substantially embedded in a polymeric web 46. The web 44 can be characterized so that it the areas without warp threads and with warp threads 40,42 defined. Figure 3 is a fragmentary plan view from above on the composite web 34, wherein an upper portion of the polymeric web 46 is removed, to expose a portion of the fabric 44. phantom lines also show schematically and partially the areas without warp threads and with warp threads 40,42 in Figures 3 and 5.

[19]

With reference to Figure 3 the fabric contains 44 preferably warp threads 48, the extend in the longitudinal direction, and weft yarns 50, the extend laterally, the lies at least approximately perpendicular to the longitudinal direction. In Figures are just a few representative threads 48,50 in each case with their reference marks identified, in the effort, to make clear the drawings. [...] & Nkulengu rail; the exemplary embodiment of the present invention contain the areas without warp threads 48 40 preferably no warp threads, and each of said portions with warp threads 42 preferably contains one or more of the warp yarns 48. [...] & Nkulengu rail; the exemplary embodiment of the present invention extend all the weft threads 40 and 50 in each of the areas without warp threads with warp threads, weft threads 42 and preferably extend completely about each of the areas without warp threads and all with warp threads, in particular after original, longitudinally extending side edges of the composite web 34 are cut off, as is discussed in more detail in the sequence.

[20]

[...] & Nkulengu rail; the exemplary embodiment of the present invention and as discussed in more detail in the sequence is, the fabric 44 provides for a sufficient strength in the warp direction in an advantageous manner, so as to prevent an undesired longitudinal stretch the composite web leaves provides can 34, wherein the fabric is in an advantageous manner an appropriate space between the regions with warp threads 42 for an optimal slots/cutting to the width, and the tissue enough space between the weft yarns 50, so that the polymeric material of the polymeric web 46 originally around each of the weft yarns 50 fly & Nkulengu rail; en.

[21]

With reference in particular to Figure 2 to 5 the polymeric web 46 preferably contains: longitudinally extending side edges 52, which are laterally spaced from one another; laterally extending end edges 54, longitudinally spaced; and outer & Nkulengu rail; of, broad, upper and under surfaces 56,58, each extending longitudinally and laterally between the extend and in continuation to the edges 52,54. [...] & Nkulengu rail; warp and weft threads are the exemplary embodiment of the present invention all 48,50 of the fabric 44 between the top and bottom surfaces 56,58 arranged warp and weft threads is located on and none of the free one of the top and bottom faces. Figure 2 shows, for example that none of the threads 56,58 of the fabric 44 on the upper and lower surface 56,58 is exposed, since Figure 2 shows a top view of the composite web 34 shows both from above and from below. As represented in Figure 4 is preferably none of the warp yarns 48 52 freely on one of the side edges, while the weft yarns 50 preferably are exposed at the side edges 52. By contrast, as shown in Figure 5 and represented, the warp threads 54 freely lie preferably on the end edges 48.

[22]

[...] & Nkulengu rail; the exemplary embodiment of the present invention to the original side edges of the composite web 50 not necessarily lie the weft threads 34 freely, but the original side edges (not shown) are preferably cut off, to provide the illustrated side edges 52 lie, to which the weft threads free. The wherein & Nkulengu rail; t, according to & Nkulengu rail; the exemplary embodiment of the present invention can be the original side edges of the composite web 34 snappishly, so that they will cut off, whereby the side edges 52 are obtained. Therefore the original side edges of the composite web 34 is a plurality of structures in the circumference of the present invention, since these original side edges preferably are cut away. 54 preferably are formed by cutting the illustrated end edges also. As an alternative and if desired, special can be ensured, the original edges to form in a manner that they do not have to be cut off.

[23]

Under reference to Figure 4 and 5 the polymeric web 46 34 preferably has a thickness T defined/composite web, between and substantially perpendicular to the upper and lower surface 56,58 is defined. [...] & Nkulengu rail; the exemplary embodiment of the present invention is the thickness T less than about 0.4 inches, about 0.04 inch to about 0.4 inch and in particular the thickness is the thickness is about 0.1 inch particularly.

[24]

Referring predominantly on Figure 5 each has a laterally extending width W1 of the areas having warp threads 42 preferably contains the polymeric web 46 and the entire thickness is located within the width W1 the. [...] & Nkulengu rail; the exemplary embodiment of the present invention is at least about the diameter of a single one of the warp yarns 48 each width W1, W1 is about the diameter of a single one of the warp threads in particular each width 48 up to approximately one Fu & Nkulengu rail; and W1 is about 0.5 inch particularly each width.

[25]

As represented in Figure 5 as well, each has a laterally extending width of the inner portions without warp threads 40 preferably contains the polymeric web W2 and the entire thickness T 46, the is located within the width W2, and each of said outer & Nkulengu rail; ear 40 preferably has a laterally extending width W3 areas without warp threads and the entire thickness T contains the polymeric web 46, the is located within the width W3. [...] & Nkulengu rail; the exemplary embodiment of the present invention is each width W2 greater & Nkulengu rail; he than or at least about 0.5 cm, in particular each width W2 is greater & Nkulengu rail; at least about 0.5 cm to about 1.5 inch he than or, W2 is about 0.6 inch and more particularly each width. [...] & Nkulengu rail; the exemplary embodiment of the present invention is each width W3 greater & Nkulengu rail; he than or at least about 0.15 inches, W3 is greater in particular each width & Nkulengu rail; 0.15 inch to about 0.75 inch as or at least about, and more particularly each width W3 is about 0.5 cm.

[26]

[...] & Nkulengu rail; an alternative embodiment, of the present invention are the widths W3 is equal or substantially equal to the widths W2. Indeed, variations in the outer can of the present invention alternative embodiments & Nkulengu rail; ear areas without warp threads 40, said laterally extending widths W3 and 52 contain the longitudinally extending side edges, as for example, in some cases a slots in the longitudinal direction (e.g. as in the sequence discussed with reference to Figure 8) close to the longitudinally extending side edges of the composite web 34 is not necessary. For example can according to & Nkulengu rail; alternative embodiments of the present invention only one or very few broad composite webs 40 at one or more predetermined positions contain areas without warp threads, these appear only there, where a longitudinal slots is desired. The desired longitudinal slots may take place either at a distance from the longitudinally extending side edges, such as along the center line of the composite web.

[27]

Figure 6 is an isolated, schematic, substantially [...] & Nkulengu rail; [...] view of a part of the fabric 44 according to & Nkulengu rail; the exemplary embodiment of the present invention. W2 (Figure 2,3 and 5) lateral width The and each inner area (Figure 2,3 and 5) without warp threads 40 corresponds to D1 (Figure 6) between substantially spaced preferably a separation distance, yet adjacent warp threads 48, respectively to adjacent regions 42 (Figure 2,3 and 5) include with warp threads. Therefore each separation distance D1 greater is & Nkulengu rail; he than or at least about 0.5 cm, in particular each separation distance D1 greater is & Nkulengu rail; at least about 0.5 cm to about 1.5 inch and he than or is about 0.6 inch particularly each separation distance D1. [...] & Nkulengu rail; the exemplary embodiment of the present invention is for pairs of adjacent warp threads 48,42 are located in the same region with warp threads the spaced, the separation distance D2 (Figure 6) between the warp yarns of each pair substantially less than the separation distance D1 between the substantially, but still adjacent warp threads, the each belong to adjacent regions 42 with warp threads.

[28]

As 3 and 6 can be identified as best with reference to Figure is preferably, the warp and weft threads that the 48,50 form a relatively open bond in the areas with warp threads 42. Preferably, the bond prevents an undesirable slippage and shifting of the threads 48,50, and in particular the bond is the leno weave. The leno weave is a conventional bond, the the art must know about it. For the art should be obvious that are arranged in pairs in a uniquely turner connection process the warp threads (i.e., the weft threads) and the bullet hole is shot just above the tissue, such as at a ground knit, with the exception that the warp threads are rotated alternately to the right and to the left, wherein it is used before each weft cross. The leno weave provides strength and starch in a fabric having open bond, whereby an undesirable slipping and shifting of the threads is reduced. The wherein & Nkulengu rail; t, according to & Nkulengu rail; the exemplary embodiment of the present invention are the warp threads woven in a leno weave 50 48 preferably by the weft threads, so that in each of the regions with warp threads are four pairs of closely adjacent warp threads present 42, wherein each pair of the adjacent pair is spaced approximately equal. [...] & Nkulengu rail; the exemplary embodiment of the present invention, the warp and weft threads 48 a clear locking of the leno weave, 50 prepared, and this locking ensures that the fabric 44 during the process to substantially embedding the fabric in the polymeric web 46 is sufficiently stable.

[29]

[...] & Nkulengu rail; the exemplary embodiment of the present invention can be any kind of thread 48 the warp threads, the appropriate tensile strength characteristics, so as to prevent an undesirable stretching the composite web are preferably 34, and preferably multi-filament polyester threads. 48 threads can having a denier of about 500 particular, the warp threads yarns having a denier of about 2000 to be, and preferably are having a denier of about 1000 multi-filament polyester threads, are arranged so the contains that each region with warp threads 42 eight of the warp threads. [...] & Nkulengu rail; the exemplary embodiment of the present invention is the alternating arrangement of the regions with warp threads and without warp threads 42 repeatedly, over the entire width of the web 40, which leads to an average number from about 7.2 warp threads 44 48 per inch width of the web.

[30]

[...] & Nkulengu rail; the exemplary embodiment of the present invention is a significant number, in particular a majority, and most particularly the total number of weft yarns 50 one type of thread, the not for absorbing fluid (e.g., solid polyester monofilament yarns) inclines. In particular the weft threads are-monofilament yarns having a denier of about 560 50 preferably polyester, encapsulates are spaced far enough the uniformly, so that the polymeric web substantially the weft threads. Preferably, about 50 per inch of length of the fabric 10 weft threads 44 present. [...] & Nkulengu rail; the exemplary embodiment of the present invention is 44 than Style No [...] & Company 930202 from the tissue, Spartanburg, South Carolina, obtainable; the fabric 44 may, however, be any other type of tissue, 34 gives the desired effect that the composite web.

[31]

Figure 7 shows schematically Devices and methods for forming the composite web 34,36 from the composite web for cutting the portions 38 and for the production of endless belts from the sections according to & Nkulengu rail; the exemplary embodiment of the present invention. The web is unwound from a roll 44 by one or more transport mechanisms 60 and 62 preferably transported, along the path of travel of the fabric 34 are arranged and/or the composite web 44. The order machines 44 64 is transported by a A coater or between tissue. There can be used any kind of suitable A coater, in the technique for coating a wide web or a wide fabric is known. In the 64 44 is preferably embedded between the the fabric order machines A coater or at least essentially in the polymeric web 46, so as to form the composite web 34. order machines Apply [...]foil-extrude or 64 can in particular on both sides of the fabric 44 the, to embed the fabric at least substantially in the polymeric web 46. Alternatively order machines can be laminated to the sides of the fabric in each case pre-formed polymeric webs 64 the, wherein a sufficient heat is used, so as to soften the webs are adhered to each other so that the tracks around the threads 48,50 of the fabric fly & Nkulengu rail; en, and the webs at the edges of the fabric and through the spaces between the yarns of the fabric. [...] & Nkulengu rail; the exemplary embodiment of the present invention is the polymeric web 46 an elastomeric material, and in particular polyurethane or the like.

[32]

As part of the coating process, or immediately downstream of the 64 order machines, 34 can be passed between the composite web [...] or the like, can be passed to provide on one or both of the upper and lower surface 56,58 the composite web a surface texture, and/or the composite web to cooling purposes between cooled rollers. The composite web 66 34 is then preferably formed into a roll. Afterwards, and in some cases in the other plant, the composite web is unwound from the roll 68 66 by one or more transport mechanisms, are arranged along the path of travel of the composite web. In a cutting mechanism 34 36 are cut off from the composite web 70 portions. [...] & Nkulengu rail; the exemplary embodiment of the present invention are cut the sections 36 both laterally and longitudinally.

[33]

As best with reference to Figure 8 can be seen, the sections 36 are cut with a slitter/a knife 34 preferably along the center line in the longitudinal direction of the composite web 72 preferably one of the areas without warp threads 40, so that the warp threads are exposed at the cut side edges 52 of the resulting sections not 48, as represented in Figure 4. The wherein & Nkulengu rail; t, when the composite web is cut to the width slotted/34, the cut side edges 52 of the resulting sections are made from the polymeric web 46 36 the composite web preferably only, the surrounds the exposed end parts of the weft threads 52, as represented in Figure 4.

[34]

The relative longitudinal movement between the knife 72 and the composite web 34 simplifies the cutting in the longitudinal direction with the blade. This relative longitudinal movement is represented schematically in Figure 8 by means of the knife 72, represented by full and dotted lines is the both. The representation in broken lines, shows the position prior to cutting and the line of the knife 72 in full line of the knife 72 shows the position representation after cutting. The 34 36 in Figure 8 are in the middle portions/composite web broken to show represented that it may have various different lengths, and they can have different widths also various, wherein the lengths preferably a multiple larger & Nkulengu rail; he than the widths are. In particular, preferably that the cutting in the longitudinal direction with the blade 72 is continuous, wherein the cut extends over at least several Fu & Nkulengu rail; extends, and in many situations than ten Fu & Nkulengu rail extends the continuous cut; to fifteen Fu & Nkulengu rail ;, twenty Fu & Nkulengu rail ;, three & Nkulengu rail; ig Fu & Nkulengu rail; or more, or by means of yet greater & Nkulengu rail; of lengths, such as, for example, over a hundred Fu & Nkulengu rail; or more, without being reduced to thereon.

[35]

In addition or as an alternative to the slitter 72, the a knife with a sharp cutting edge is, the slitter ultrasonic gumption device or another type of cutting device 72 can be a, the the cut side edges 52 advantageously heated. For example may in some cases be such a heating, or heating by other means, effect that the parts of the weft yarns 50, the cut side edges 52 lie close to the, and the parts of the polymeric web 46, the fuse is located near the cut side edges, advantageously with each other, as is discussed in more detail in the sequence.

[36]

Under renewed reference to Figure 36 preferably at the ends of the sections 7 each is connected at a the connection & Nkulengu rail; mechanism 74, so as to form an endless belt 38. For each section 36 an endless belt 38 is produced, by the two ends of the section 46 is fused at the ends brought together and the polymeric web, so as to form a thermoplastic am & Nkulengu rail the connection ;. Such form the the connection & Nkulengu rail; the warp threads lie near the the connection 48 am & Nkulengu rail; am advantageously not free, so as to be able to absorb no liquid. The wherein & Nkulengu rail; t, according to & Nkulengu rail; the exemplary embodiment of the present invention are all warp threads 38 48 38 46 of the endless belt in the polymeric web each endless belt completely encapsulated. The endless belts 38 can advantageously in place of the conveyor belt 22 of Figure 1 and to transporting food products 32 are used during the processing of foodstuffs, preferably without ever having to make a sealing material 52 to the side edges of said endless belts 38. [...] & Nkulengu rail; an alternative embodiment of the present invention can have any sealing means at the side edges 52 and/or other surfaces of the bands 38 are applied.

[37]

[...] & Nkulengu rail; the exemplary embodiment of the present invention is for example preferably that none of the warp yarns 48 of the endless belts 38 is exposed, and that each of the areas without warp threads and with warp threads 40,50 of the endless belt contains 38 all the weft threads 42 of an endless belt. Although these and other configurations for the exemplary embodiment of the present invention are preferably, contain alternative embodiments of the present invention variations of the preferred configurations of the exemplary embodiment. For example, according to & Nkulengu rail; acceptable one embodiment of the present invention that one or more of the warp threads 38 on a Au & Nkulengu rail 48 of an endless belt; [...] of the endless belt are exposed and/or one or more of the weft yarns 50 of the endless belt is not in one or more of the areas without warp threads and with warp threads 40,42 of the endless belt extends.

[38]

[...] & Nkulengu rail; an alternative embodiment, the fabric 44 is woven by the present invention a different than the leno weave. Could be used as one example of it is assumed that another type of bond in the areas with warp threads 42, such as a plain weave, but point without being reduced. In such situations it may be favorable, the (n) 64 immediately downstream and closely adjacent said Loom A coater to position, the exits the fabric is prepared, so that the polymeric web 46 is attached to the tissue, as the tissue from the loom, without to wind the fabric between said steps of forming the fabric and the formation of the composite web into a roll 60. In this alternative embodiment is capable of limiting adopted that the polymeric web 46 a relative movement between the threads of the fabric sufficiently, so that it is not necessary, to use the leno weave.

[39]

Indeed, according to contains & Nkulengu rail; one embodiment of the present invention each of said portions with warp threads only one warp thread 42, so that each of said portions has a width of approximately to the diameter of the warp threads with warp threads would be preferably; and in this embodiment that each of the areas contains all the weft threads with warp threads, warp and weft threads are entangled each other and that the, so that the fabric is bonded basicbound or in other suitable manner. In other versions this embodiment could each of the portions of warp threads two, three or more warp threads and preferably would be for each pair of adjacent warp threads contain, the lie in the same range with warp threads, the spacing between the warp yarns of the pair less than the distance between adjacent regions with warp threads; each of said portions contains all the weft threads with warp threads, warp and weft yarns are intertwined and the respectively, so that the fabric is bonded basicbound or in other suitable manner.

[40]

Although according to & Nkulengu rail; the exemplary embodiment and some of the other embodiments of the present invention is preferably that the threads of the fabric are entangled each other, so that the fabric is bonded, other types may be used instead of the fabrics bonded fabric.

[41]

Other alternative embodiments and other embodiments described herein, one to each of the exemplary can be identical, with the exception of said variations and variations, the skill in the art in view of this disclosure are obvious. [...] & Nkulengu rail; each of these alternative embodiments can be from the same type of material as the weft threads 50 of the fabric 46 44 (e.g. a polyester elastomer or a polyester urethane elastomer ) the polymeric web, or the materials of the fabric 46 44 and the polymeric web are selected in a different manner, so that the weft threads 50 or at least some are melted into the polymeric web or parts of the weft yarns 50 46, when the polymeric web 44 is applied to the tissue or at some other time, and the molten part of the polymeric web or molten parts of the weft threads are weft threads, so that the composite web 34 no weft threads or contains a reduced number and/or parts of the weft threads. (N) (n) could For example 64 (Figure 7) the A coater be operated so that during the above-described coating process the temperature of the polymeric web 46 50 lies above its melting point and the melting point of the weft threads. Although it for all embodiments of the present invention is preferably that the cut side edges 52 are substantially for liquid impermeable, such a degree of impermeability can be increased by melting the weft threads 46 50 into the polymeric web. The wherein & Nkulengu rail; t, according to & Nkulengu rail; the cut side edges 52 the present alternative embodiments are substantially for liquid impermeable and/or they are not recognizable at the cut side edges 52 and/or weft yarns 50 52 are substantially homogeneously the cut side edges. [...] & Nkulengu rail; another embodiment of the present invention is minimized to the cut side edges 52 each appearance of the weft yarns 50,50 by the weft threads 46 have the same colour as the polymeric web.

[42]

In a example a hot is represented & Nkulengu rail; in addition to the cut side edges 52 (not) along/irons 34 the composite web moves with the aim, to remove all bubbles in the polymeric web 46, has been exposed by the cutting of the edges. In addition provides could & Nkulengu rail; e irons or other heating device be used, for example, 50 of the fabric 44 of the same type of material when the weft threads are as the polymeric web 46 (or when these materials otherwise be chosen, around are to achieve the desired end result are lie lie are are fused), such that portions of the weft threads, adjacent the cut side edges 52 and the parts of the polymeric web, adjacent to the cut side edges, , so that the cut side edges 52 substantially for liquid impermeable to the cut side edges 52 and/or no weft yarns 50 and/or the cut side edges 52 substantially homogeneously recognizable. Another example can also be achieved the previously elements of melting, by the composite web is passed through a heated nip 34, or by other means, to obtain the desired result.

[43]

The person skilled in the art, the inventions relate to these, many modifications and other embodiments of the inventions described herein will come to mind, the benefits of the lessons have the, in the preceding descriptions and the accompanying drawings have been set forth. It therefore goes without saying that the inventions are not limited to the specific disclosed embodiments and modifications and other embodiments are intended to be contained in the circumference of the attached claims. Certain expressions have been used here Although, they are descriptive sense and not as restricting generally and to understand.



[44]

A composite sheet comprises a fabric (44) that is at least partially embedded in a polymeric sheet (46), with the fabric including warp yarns (48) extending in a longitudinal direction and weft yarns (50) extending in a lateral direction that is at least perpendicular to the longitudinal direction. A composite sheet comprises a fabric that is at least partially embedded in a polymeric sheet, with the fabric including warp yarns extending in a longitudinal direction and weft yarns extending in a lateral direction that is at least perpendicular to the longitudinal direction. The polymeric sheet includes longitudinally extending edges that are laterally spaced apart from one another; outer, longitudinally extending, two surfaces that extend laterally between, and are contiguous with, the edges; and a thickness defined in between, and perpendicular to the two surfaces. All of the warp and weft yarns of the composite sheet are between the two surfaces, and are not exposed at either of the two surfaces. Longitudinally extending two areas of the polymeric sheet are arranged in an alternating laterally extending series such that each of the first areas is contiguous with at least one of the second areas. For each of the first areas, weft yarns extend laterally through the first area, and warp yarns extend longitudinally through the first area. For each of the second areas, none of the ward yarns of the composite sheet are in the second area; weft yarns extend laterally through the second area, the second area having a laterally extending width and including all of the thickness of the polymeric sheet that is within the width; and the width of the second area is at least 0.3 inch. An independent claim is also included for a method for providing a composite sheet, which functions when exposed to fluid, comprising processing a polymeric sheet, including at least partially embedding yarns in the polymeric sheet, so that the polymeric sheet is reinforced by at least some of the yarns, and at least portions of the yarn(s) and a portion of the polymeric sheet are melted to one another at least at a region, which is or becomes an edge of the polymeric sheet, so that the edge is impermeable to the fluid.



A composite sheeting, comprising: a woven fabric which is at least partially embedded in a polymer sheeting, whereby the woven fabric contains warp threads extending in the longitudinal direction and weft threads extending in the transverse direction and are situated at least approximately perpendicular to the longitudinal direction, wherein: the polymer sheeting comprises: edges extending in the longitudinal direction, spaced a distance apart from one another laterally,external first and second surfaces extending in the longitudinal direction, extending between the edges laterally and in continuation thereof, anda thickness which is defined between and essentially perpendicular to the first and second surfaces;all warp threads of the composite sheeting and all weft threads of the composite sheeting: are arranged between the first and second surfaces, andare not exposed on either the first surface or on the second surface;several first and second areas of the polymer sheeting extending in the longitudinal direction are arranged in alternating series extending laterally, so that each of the first areas continues at least one of the second areas,in each of the first areas: at least several of the weft threads extend laterally through the first area, andat least several of the warp threads extend in the longitudinal direction through the first area; andin each of the second areas: none of the warp threads of the composite sheeting is arranged in the second area,at least several weft threads extend laterally through the second region,the second region has a width extending laterally and contains the total thickness of the polymer sheeting, which is within the width,the width of the second region amounts to at least 0.5 cm; andthe warp threads which are arranged in pairs are intertwined, so that the woven fabric is bound, whereby they intersect before each weft thread is inserted.

The composite sheeting according to Claim 1, wherein all the weft threads of the composite sheeting extend in each of the first and second regions.

The composite sheeting according to Claim 1, wherein each first region contains at least three of the warp threads.

The composite sheeting according to Claim 1, wherein at least a plurality of the weft threads of the composite sheeting are monofilament threads.

The composite sheeting according to Claim 1, wherein none of the weft threads of the composite sheeting is exposed on any of the edges.

The composite sheeting according to Claim 5, wherein none of the warp threads of the composite sheeting is closer than approximately 0.15 inch from one of the edges.

The composite sheeting according to Claim 1, wherein the composite sheeting is in the form an endless belt.

The endless belt according to Claim 7, wherein all the warp threads of the endless belt are encapsulated completely in the polymer sheeting.

The endless belt according to Claim 7, wherein the endless belt extends around several rolls, which carry the belt and are rotatably mounted on a frame.

The method, comprising: completely severing a composite sheeting according to at least one of Claims 1 to 9 over at least several feet to form at least two separate parts of the composite sheeting, wherein: a composite sheeting according to any one of Claims 1 to 9 is provided, whereinthe cutting is performed in the longitudinal direction between a pair of neighboring warp threads of the composite sheeting in one or more second regions without warp threads of the composite sheeting, said second regions extending in the longitudinal direction to form at least several feet of cut edges extending in the longitudinal direction of each of the parts, so that none of the warp threads is exposed at the cut edges.

The method according to Claim 10, wherein the cutting includes such cutting, so that none of the warp threads is closer than approximately 0.15 inch from one of the cut edges.

The method according to Claim 10, additionally comprising the joining of opposing ends of one of the separate parts of the composite sheeting to form an endless belt.

The method according to Claim 13, additionally comprising: guiding the endless belt around several rollers which carry the belt and are rotatably mounted on a frame;then transporting a food item on the endless belt; andnot sealing the cut edge of the endless belt before transporting the food item.