Albany International Corporation

Other

Dutt, William H.

William H Dutt

Eric R Romanski

Dana Eagles

Francis L Davenport

James G Donovan

Bjorn Rydin

Crayton Gregory Toney

Srinath P Tupil

Jan Rexfelt

Donald Tripp Lawton

Thomas H Curry

J Drew Horn

A seamless, woven, flexible fluid containment vessel or vessels for transporting and containing a large volume of fluid, particularly fresh water, having beam stabilizers, beam separators, reinforcing, and the method of making the same.

Flexible fluid containment vessel

A resin-impregnated endless belt for a long nip press or calender of the shoe type, or for other papermaking and paper-processing applications, has a base fabric in the form of an endless loop with an inner surface, an outer surface, a machine direction and a cross-machine direction. The base fabric has machine-direction (MD) structural elements and cross-machine-direction (CD) structural elements in an open structure wherein at least some of the MD structural elements and CD structural elements are spaced apart from one another. The MD structural elements cross the CD structural elements at a plurality of crossing points, where they are joined to one another by mechanical, chemical or thermo-bonding means. A coating of a first polymeric resin is on the inner surface of the base fabric. The first polymeric resin impregnates and renders the base fabric impermeable to liquids, and forms a layer on the inner surface thereof. The coating is smooth and provides the belt with a uniform thickness. A method for manufacturing the belt, using a smooth and polished cylindrical mandrel with a spacer ring slidably disposed thereon, is also shown.

Resin-impregnated belt for application on papermaking machines and in similar industrial application

A calender belt for the compliant calendering of a paper web includes an endless base substrate, a staple fiber batt attached to at least the outside of the endless base substrate, and a polymeric resin material totally impregnating the fiber/base composite structure comprising the endless base substrate and the staple fiber batt to a substantially uniform depth. That depth may be such that the polymeric resin material does not reach the base substrate, or partly or completely impregnates the base substrate. A layer of polymeric resin material is built up upon the staple fiber material to a predetermined thickness. Once the polymeric resin material is cured, it is ground to a desired smoothness without exposing any fiber on the ground surface. That the penetration of the polymeric resin material into the staple fiber batt, and possibly into the base substrate, is to a uniform depth enables the calender belt to provide a uniform pressure pulse as it passes with a paper web through the nip in a compliant calender.

Belts for compliant calendering

A method for manufacturing a resin-impregnated endless belt structure having a texturized outer surface requires the use of a support structure, either a cylindrical mandrel or a pair of carrying rolls, having a texturized surface. An endless, permeable base structure is placed about the support structure, which is adapted to place the base structure under tension in a longitudinal direction. A polymeric resin material is dispensed onto the outside of the base structure on the support structure. The polymeric resin material totally impregnates the base structure and passes therethrough to coat the texturized surface of the support structure. A layer of polymeric resin material is also built up on the outside of the base structure. The polymeric resin material is then cured, and may be ground to provide the layer of polymeric resin material with a smooth, uniform surface, and the belt structure thus obtained is removed from the support structure. The belt structure is finally turned inside out, placing an impression of the texturized surface of the support structure on the outside of the belt structure, that texturized surface having a plurality of indentations for the temporary storage of water pressed from a fibrous web in a press nip.

Resin-impregnated belt having a texturized outer surface for application on papermaking machines

A resin-impregnated endless belt for a long nip press or calender of the shoe type, or for other papermaking and paper-processing applications, has a base fabric in the form of an endless loop with an inner surface, an outer surface, a machine direction and a cross-machine direction. The base fabric has machine-direction (MD) structural elements and cross-machine-direction (CD) structural elements in an open structure wherein at least some of the MD structural elements and CD structural elements are spaced apart from one another. The MD structural elements cross the CD structural elements at a plurality of crossing points, where they are joined to one another by mechanical, chemical or thermobonding means. A coating of a first polymeric resin is on the inner surface of the base fabric. The first polymeric resin impregnates and renders the base fabric impermeable to liquids, and forms a layer on the inner surface thereof. The coating is smooth and provides the belt with a uniform thickness. A method for manufacturing the belt, using a smooth and polished cylindrical mandrel with a spacer ring slidably disposed thereon, is also shown.

A method for manufacturing a resin-impregnated endless belt structure is carried out on an apparatus having an outer cylinder having an inner cylindrical surface coaxial with a smaller radius cylindrical mandrel. An endless base structure for the endless belt structure is disposed within the outer cylinder on the inner cylindrical surface. The cylindrical mandrel, having an inwardly curved nose, is then inserted into the outer cylinder forming a nip of converging geometry between the nose and the inner cylindrical surface. Polymeric resin material is dispensed continuously into the nip while the cylindrical mandrel is gradually moved completely into the outer cylinder. The nose forces the polymeric resin material into the endless base structure, and air bubbles out, while forcing the endless base structure against the inner cylindrical surface. After the polymeric resin material is cured, the endless belt structure, having a totally impregnated, air-bubble free endless base structure with a coating on its inner surface, may be obtained upon removal from the apparatus.

Method for manufacturing resin-impregnated endless belt structures

A resin-impregnated endless belt for a long nip press or calender of the shoe type has a base fabric in the form of a multilayer braided structure wherein each of the constituent layers are connected to those adjacent thereto by at least one interlocking yarn to inhibit interlayer delamination. The base fabric is in the form of an endless loop, at least the inner surface of which is coated with a polymeric resin material, such as polyurethane. The polymeric resin material impregnates the structure of the base fabric, rendering it impermeable to oil and water.

Braided base fabrics for shoe press belts

An endless impervious, oil, abrasion, and crush resistant belt for use with papermaking machinery such as presses, especially of the extended nip type for the mechanical removal of water from a web of paper including a urethane coating impregnating woven base providing a structure which is impregnated and impervious to oil, water, and air. The impregnated surface of the belt is made smooth and uniform in thickness through a grinding and polishing operation to act as a hydraulic bearing surface.

Extended nip press belt having an interwoven base fabric and an

An endless impervious, oil, abrasion, and crush resistant belt for use with papermaking machinery such as presses, especially of the extended nip type for the mechanical removal of water from a web of paper including a urethane coating impregnating a portion of a woven base providing multiple layers of base void of urethane and the portion impregnated impervious to oil, water, and air. The impregnated surface of the belt is made smooth and uniform in thickness through a grinding and polishing operation to act as a hydraulic bearing surface. The portion of the base void of urethane is capable of receiving and carrying water essential in the papermaking process.

A belt for use on an extended nip press for dewatering a fibrous web is shown. The belt includes a base fabric having machine-direction and cross-machine direction yarns and takes the form of an endless loop. At least one of the machine-direction and cross-machine direction yarns is a spun yarns of staple fibers. The base fabric is completely coated and impregnated with a polymeric resin, such as polyurethane, to render it impervious to liquids, especially lubricating oil. The inner surface of the resulting belt slides over the arcuate pressure shoe component of the extended nip press during its operation. The outer surface of the belt is provided with grooves separated by land areas which together define channels for water pressed from the fibrous web in the press nip. The land areas are anchored to the belt by means of staple fibers from the spun yarns embedded in the coating and are not susceptible to delamination.

Construction for an extended nip press belt

Papermachine clothing is described, made up of synthetic, polymeric resin fibers which include porous fibers and filaments.

Papermachine clothing

Forming fabrics are made in multilayer construction, with a hydrophobic top layer and a hydrophilic base layer or layers. The fabric is advantageous in a forming wire, obviating rewet in a forming paper sheet.

Forming fabric structure to resist rewet of the paper sheet

A forming fabric is disclosed having crimped machine direction monofilament yarns alternating with uncrimped monofilament yarns. The fabric provides optimum stability and seam strength.

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Wynantskill, NY, United States of America

William H Dutt