A flat woven papermaker's forming fabric having a paper side layer and a machine side layer interconnected by pairs of weft binder yarns. Each of the binder yarn pair members in sequence interweaves with a portion of the paper side layer warp yarns in segments of the weft yarn path so as to complete an unbroken weft path in the paper side layer weave pattern, and to provide an internal paper side layer float. Each of the binder yarn pair floats interlaces with a machine side layer warp yarn so as to bind the paper and machine side layers together. To recess the binder yarns from the plane of fabric wear the interlacing point is located at or near the midpoint of an internal float in the machine side layer warp yarn. The number of paper side layer weft yarns located between each of the pairs of intrinsic weft yarns is irregular within one repeat of the overall fabric weave pattern. The location of the paper side layer internal floats also determines the interlacing locations with the machine side layer. A wider choice of possible paper and machine side layer weave design combinations than was previously possible is thus made available in forming fabrics including weft binder yarn pairs, thereby allowing for a better match between the fabric and the paper maker's requirements.
The invention relates to a paper machine clothing in the form of a fabric with a web pattern which recurs regularly over the surface and has indentations (20) that are formed by the thread overlays (21), the latter having been surface ground. Said thread overlays cover three consecutive warp or weft threads crosswise thereto. A paper machine clothing of this type can be used especially in "through air drying" techniques to produce an especially voluminous tissue paper.
A papermaking wire cloth, especially for the sheet forming zone, includes a paper side (12) and a backing side (14). The wire cloth is formed out of at least one type of transverse threads (16, 18) which are interwoven with at least one type of longitudinal threads (20). The threads together form repeats (A-H) and at least two different types of crossing (22, 24). The longitudinal threads (20) are alternated within the respective repeat (A-H) on the backing side (14), forming the other type of intersection (24). The transverse threads (18) on the backing side (14) are held on their outer side (26) which faces the paper side (12), by at least two longitudinal threads (20) within the repeat (A-H) on the backing side (14). Maximum fibre support is achieved on the paper side accompanied by little marking of the upper side as the points of alternation or intersections are evenly distributed.
A multi-layer fabric which may be utilized in a papermaking process. Such fabric has a first layer of machine direction (MD) yarns, a second layer of MD yarns and a first system of cross-direction (CD) yarns having first binder yarns weaving a first contour pattern and second binder yarns weaving a second contour pattern different from the first contour pattern. The first binder yarns and the second binder yarns are each intrinsic to the first layer and each bind with the second layer. Moreover, the binder yarns each weave in sequence in the first layer more than once in a pattern repeat of the fabric. The binder yarns also weave plural contour patterns in the first layer in the weave pattern repeat.
A multilayer through-air dryer (TAD) fabric architecture having a single warp yarn system with a maximum warp fill and a weft yarn system comprised of two sets of weft yarns selected to set the warp yarn height above the weft yarns without embedment into the fabric plane, the warp and weft yarns interlacing to form diagonal apertures within the fabric to produce a high fabric air permeability for providing increased paper sheet bulk without compromising paper machine running parameters. A method of using the TAD fabric of the present invention for forming a paper sheet having increased bulk and a predetermined embossed pattern. Also, a method for manufacturing a TAD fabric to provide increased bulk and a predetermined embossed pattern of the paper sheet.
A forming fabric having a paper side layer and a machine side layer comprises a first set of paper side layer wefts, a second set of machine side layer wefts and a single set of warp yarn triplets. In the fabric weave pattern, each member of each triplet set of warp yarns interweaves with the paper side weft yarns to occupy in sequence segments of an unbroken warp path in the paper side surface, and each triplet in each set of warp yarns interlaces alone with at least one single machine side layer weft yarn. Each segment in the unbroken warp path is separated by at least one paper side layer weft yarn. The machine side layer interlacing points are regularly spaced. After heat setting, the fabrics typically have an air permeability typically from about 7,500 to about 10,500 m.sup.3/m.sup.2/hr. Paper products made using these fabrics have enhanced printability.
