Albany International Corporation

Shell Oil Comapny

Albany International Research Company, Inc.

George Bakis

Andrew B Jeffery

Dana Eagles

John Skelton

John E Flood

John F Tweedie

Thomas Henry Hagoort

Constantinos Mermingis

Disclosed is a method of producing polysaccharide foams and foams produced by the method. The polysaccharide foams are formed from a wet condition and are convection dried with a flow of warm or hot air. Such foams exhibit improvements over foams dried under ambient conditions. The present invention also discloses the formation of multi-ply foam layers. At least two sheets of foam layers are layered together and laminated either mechanically or chemically to produce a composite structure.

Method of producing polysaccharide foams

Continuous belts used on paper making machines are made of alternating aliphatic polyketones. The belts have excellent dimensional stability, are hydrolytically stable, and have good resistance to abrasive wear.

Papermachine clothing of aliphatic polyketones

A self-supporting filter element is produced from a precursor fiber web according to one of several methods. The precursor fiber web contains heat-shrinkable fibers or binder fibers or both. The web is exposed to temperatures sufficiently elevated to cause shrinkage of the fibers or melting of the binder. After cooling the web, the filter elements produced are self-supporting, and may have densities up to 500 kg/m.sup.3 to improve filtration while retaining good functional characteristics for operating pressure drop and air permeability. The self-supporting filter elements can be constructed of one material, and thus may be suitable for recycling.

High-efficiency, self-supporting filter element made from fibers

A rigidized fiber filter element is produced from a precursor fiber web. The precursor fiber web contains heat-shrinkable fibers or binder fibers or both. The web is exposed to temperatures sufficiently elevated to cause shrinkage of the fibers or melting of the binder. After cooling the web, the filter elements produced are self-supporting, and may have densities up to 500 kg/m.sup.3 to improve filtration while retaining good functional characteristics for operating pressure drop and air permeability. Rigidized fiber filter elements can be constructed of one material, and thus may be suitable for recycling.

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West Roxbury, MA, United States of America

George Bakis