Abstract:
A press fabric is manufactured by spirally winding a strip (16) in a plurality of non-overlapping abutting turns, and by joining each turn of the strip to that previously wound. The strip (16) is itself a laminated structure having at least two layers (36, 38) attached to one another. The strip (16) is manufactured in considerable lengths for subsequent use in manufacturing press fabrics in any length and width dimension.
Abstract:
A structure for use in industrial fabrics such as paper machine clothing and engineered fabrics is disclosed. The structure includes axially and radially elastic hollow members, and relatively inelastic yarns in various patterns. The structure has a high degree of both compressibility under an applied normal load and excellent recovery (resiliency or spring back) upon removal of that load.
Abstract:
A nonwoven papermaker’s fabric, usable in the dryer section of a paper machine, has a spiral wound machine direction (MD) base layer of raw stock which is wound around a pair of parallel rolls or cylinders until the desired length and width is achieved. The spiral wound MD layer is overlaid with a cross-machine direction (CD) layer of similar or dissimilar raw stock and mated by any of a number of means. The spiral wound MD layer can also be mated to another MD layer spiraled in the opposite direction and in one embodiment further mated to a CD layer. The fabric is preferably produced so that its neutral line is oriented toward the paper side of the fabric so that the paper sheet will stretch less than when typical dryer fabrics are used to turn the paper sheet and fabric around the dryer cylinders.
Abstract:
An on-machine-seamable industrial fabric includes rings in the seam region. In one principal embodiment, the rings are between the seaming loops at the two ends of the fabric and enclose at least one cross-machine-direction (CD) yarn. As such, the rings strengthen the seam region by involving the CD yarns as a reinforcement. In another principal embodiment, the rings are used instead of a seaming spiral.
Abstract:
A papermaker's fabric (110) formed by arranging a number of layers (120, 130, 140, 150) in a predetermined manner, wherein at least one layer (140) comprises a material which is woven, knitted or braided and has a first melting point temperature and wherein each of the remaining layers (120, 130, 150) has a melting point temperature which is higher than said first melting point temperature; and heating said number of layers to a temperature at least equal to said first melting point temperature and less than said melting point temperature of each of the remaining layers such that said at least one layer melts without melting the remaining layers.
Abstract:
An on- machine-seamable industrial fabric comprising rings connected by pintles. In one principal embodiment, the rings are oriented in the machine direction and the pintles extend at an angle, connecting the rings. Such configuration improves the strength of the fabric and provides resistance to needling damage. In another principal embodiment, the rings are oriented in the crossmachine direction and the pintles extend in the machine direction, joining the rings.
Abstract:
An anti-rewet press fabric (10) for paper and board machines includes a barrier layer (27) such that during compression in the press nip, the water is forced through the barrier layer (27), but is prevented from flowing, back to the paper web (24) during expansion. The barrier layer (27) comprises a continuous material possessing, for example square, rectangular, tetrahedral, circular or oblong conical inclusions (30) with a smaller opening on the bottom than on the top of the structure. Each of these "funnels" (30) effectively constitutes a one-way valve and creates a vacuum to prevent re-absorption of water by the paper sheet. Under pressure, the structure of the barrier layer (27) allows water to flow into the cones (30) and out of the smaller opening in the bottom. Upon expansion, the smaller opening in the bottom of the structure restricts backward water flow and creates a vacuum on the other side. The vacuum increases water retention in the press fabric (10) and prevents rewetting of the paper sheet (24). Another embodiment of the invention is described herein, wherein the barrier layer (27) exists as a separate fabric fed through a press section. In this embodiment, the "separate fabric" can just be the "conical inclusion sheet" itself. That is, the sheet itself constitutes an inventive belt having' anti-rewet properties.
Abstract:
A structure for use in industrial fabrics such as paper machine clothing and engineered fabrics. The structure is a bicomponent extruded elastomeric netting or mesh having a high degree of both compressibility under an applied normal load and excellent recovery (resiliency or spring back) upon removal of that load.
Abstract:
A structure for use as a compressible ultra-resilient pad is disclosed. The structure includes axially and radially elastic hollow members and relatively inelastic yarns in various patterns. The structure has a high degree of both compressibility under an applied normal load and excellent recovery (resiliency or spring back) upon removal of that load.
Abstract:
A support member such as a belt or sleeve includes a topographical pattern on its sheet contact side. A plurality of land areas, corresponding depressions, through voids, and/or groove areas are formed on the top surface of the support member to produce the topographical pattern. The land areas, corresponding depressions, through voids, and/or groove areas may be formed by graving, cutting, etching, embossing, mechanical perforation or a combination thereof. The improved belt or sleeve imparts desired physical characteristics, such as bulk, appearance, texture, absorbency, strength, and hand to a nonwoven product produced thereon.