Jwi Ltd.

Astenjohnson, Inc.

Eugene Z Fekete

Samuel M Baker

Robert P Burke

Edwin R Perry

Graham W Jackson

Rajat K Chakravarty

Kurt Wiebe

A multilayer papermaker's press felt fabric comprising in combination a woven first fabric layer, typically a double layer fabric, has a cross machine direction pin seam. A second fabric layer is located on the paper side face of the first fabric layer, and a layer of needled batt is applied to the paper side face of the second layer binding the layers together. A flap comprising a short length of the second fabric layer with attached batt overlays the pin seam area in the first layer. The second layer comprises a plurality of relatively narrow strips, which are located with a lateral edge at a first cant angle of from more than 1&#xb0; to less than 20&#xb0; to the machine direction. A third layer, similar to the second layer, can be included on the machine side of the first layer; the strip widths, the cant angles, and the direction of the cant angle relative to the machine direction for each of the two strips need not be the same. The fabric is assembled using a spiral winding technique.

Multiaxial pin seamed papermaker's press felt

A substantially planar jointed multi-layer industrial fabric, assembled from at least one segment comprising at least one woven or nonwoven ply, in which the joints utilize jointing yarns or formed structures. The jointing yarns or formed structures are placed at selected locations, such as the lateral edges, of at least one planar surface of a ply of the at least one, or first, fabric segment, and interlock in mating engagement with corresponding jointing yarns or formed structures either in at least one surface of a ply of a second segment, or in another location on the first fabric segment, to provide an integral joint. The joints are comprised of shaped yarns and formed structures which in any combination form mating engagements substantially within the plane of the fabric, such as in hook-and-loop or slot-and-rib type joints, and the like. The fabric is assembled by engaging and interlocking the jointing yarns or formed structures, for example by overlapping the segments, in either a spiral winding process or piecewise fashion, so that the jointing yarns or structures provided in the segment ply are engaged and interlocked. Further secondary processing of the joint is not required. The at least one segment may be a single continuous strip, a plurality of strips, or panels, into which the jointing structures have been incorporated.

Multi-ply industrial fabric having integral jointing structures

A multilayer porous fabric which comprises a porous core fabric provided with hook means, and at least one layer of pre-needled nonwoven fibrous batt attached by entanglement onto the hook means by pressing the core fabric and batt together. The entanglement is sufficient to anchor the batt reliably to the core fabric, so that the multilayer fabric is ready for use without further processing. The porous core fabric may be formed by weaving or as an extruded sheet, with a plurality of suitably located hook means structures on at least one of its surfaces. The hook structures engage with and entangle sufficient fibers from the pre-needled nonwoven batt to provide adequate attachment preventing the batt from separating from the core fabric enabling the multilayer fabric to be handled before use, for example for installation in a papermaking machine press section. The batt is pre-needled to a desired density before attachment to the core fabric. In many circumstances, compressive loads applied to the porous fabric serve to enhance and improve the level of entanglement of the batt onto the hook means.

Multilayer porous fabric

A multilayer papermaker's press felt fabric comprising in combination a woven first fabric layer, typically a double layer fabric, has a cross machine direction pin seam. A second fabric layer is located on the paper side face of the first fabric layer, and a layer of needled batt is applied to the paper side face of the second layer binding the layers together. A flap comprising a short length of the second fabric layer with attached batt overlays the pin seam area in the first layer. The second layer comprises a plurality of relatively narrow strips, which are located with a lateral edge at a first cant angle of from more than 1.degree. to less than 20.degree. to the machine direction. A third layer, similar to the second layer, can be included on the machine side of the first layer; the strip widths, the cant angles, and the direction of the cant angle relative to the machine direction for each of the two strips need not be the same. The fabric is assembled using a spiral winding technique.

Growing community of inventors

Dunwoody, GA, United States of America

Eugene Z Fekete