Abstract: A triple papermaking fabric includes: a set of top MD yarns; a set of top CMD yarns interwoven with the top MD yarns; a set of bottom MD yarns; a set of bottom CMD yarns interwoven with the bottom MD yarns; a set of binding yarns arranged in pairs between respective top CMD yarns; the binding yarns of each pair are interwoven with respective different top MD yarns, and the binding yarns, together, of the pair are interwoven with all the top MD yarns; the binding yarns are arranged in pairs between respective consecutive top CMD yarns; the binding yarns of each pair bind respective different bottom MD yarns, each binding yarn of the pair binding only one bottom MD yarn.

Abstract: A triple papermaking fabric, having at least one fabric repeat unit which comprises: a set of sixteen warp yarns or MD yarns, which extend in machine direction and are subdivided into eight top MD yarns eight bottom MD yarns; three top CMD yarns interwoven only with the top MD yarns form a top fabric layer; three bottom CMD yarns interwoven only with the bottom MD yarns to form a bottom fabric layer; three binding yarns interwoven with both the top MD yarns and the bottom MD yarns so as to bind the top layer to the bottom layer; the fabric has a ratio between weft yarns and warp yarns of 3:1.

Abstract: A triple papermaking fabric includes a set of warp machine direction top yarns; a set of weft cross machine direction top yarns interwoven with the top MD yarns to form a top fabric layer; a set of bottom MD yarns; a set of bottom CMD yarns interwoven with the bottom MD yarns to form a bottom fabric layer; and a set of binding yarns arranged in the cross machine direction and interwoven with the top MD yarns and binding the top layer to the bottom layer. The binding yarns are arranged in pairs between two adjacent top CMD yarns, and in a fabric repeat unit at least one binding yarn of each pair is interwoven with at least one bottom MD yarn. The ratio between weft yarns and warp yarns is 4:2.

Abstract: A quadruple papermaking fabric comprises: a set of longitudinal machine direction top yarns; a set of cross machine direction top yarns interwoven with the top MD yarns to form a top fabric layer; a set of central MD yarns; a set of central CMD yarns interwoven with the central MD yarns to form a central fabric layer; a set of bottom MD yarns; a set of bottom CMD yarns interwoven with the bottom MD yarns to form a bottom fabric layer; a set of pairs of binder yarns arranged in the cross machine direction and interwoven with the top MD yarns. At least one of the binder yarns of each pair is interwoven with the central MD yarns to form a first binding pattern between the top layer and the central layer; at least some of the central CMD yarns define respective stitching yarns that are interwoven with the bottom MD yarns to form a second binding pattern between the central layer and the bottom layer.

Abstract: A triple papermaking fabric includes a set of warp machine direction top yarns; a set of weft cross machine direction top yarns interwoven with the top MD yarns to form a top fabric layer; a set of bottom MD yarns; a set of bottom CMD yarns interwoven with the bottom MD yarns to form a bottom fabric layer; and a set of binding yarns arranged in the cross machine direction and interwoven with the top MD yarns and binding the top layer to the bottom layer. The binding yarns are arranged in pairs between two adjacent top CMD yarns, and in a fabric repeat unit at least one binding yarn of each pair is interwoven with at least one bottom MD yarn. The ratio between weft yarns and warp yarns is 4:2.

Abstract: It is provided a corrugating belt for supporting/conveying corrugated cardboard in a corrugating machine, having a gas-permeable belt substrate and provided with a working surface facing in use the cardboard to be conveyed; the working surface presents feeding zones, which have a polymeric material coating increasing the friction coefficient between the working surface and the cardboard, alternated with transpiration zones, in which the working surface is not coated with polymeric material and the corrugating belt is gas-permeable.

Abstract: A corrugated cardboard manufacturing machine (10) wherein at least one continuous supporting belt (11) for supporting/conveying a sheet of cardboard is moved along a predetermined path by actuating means (13); and where the supporting belt (11) is defined by a mat of multispiral fabric (1) preferably made of synthetic polymer fibers.