Allasso Industries, Inc.

Other

North Carolina State University

Chappas, Walter

Pourdeyhimi, Behnam

Walter J Chappas

Behnam Pourdeyhimi

William L McLaughlin

Mohamed I Al-Sheikhly

Harry M Barnes, Iii

Mahnaz Farahani

This disclosure relates to articles that comprise polymeric winged fibers. The winged fibers have a high surface area because of their structure, which includes a core surrounded by a plurality of lobes. Channels of one micron or less in width are formed between adjacent lobes to form paths for the capture and/or transport of gases, liquids or particles. The winged fibers are assembled in woven or non-woven fabrics for use in wipes, absorbent pads, composite structures, apparel, outdoor wear, bedding, filtration systems, purification/separation systems, thermal and acoustic insulation, cell scaffolding, and battery membranes.

Articles containing woven or non-woven ultra-high surface area macro polymeric fibers

The present invention is directed to a high surface area fibers and an improved filter composite media made from the same. More specifically, the composite media preferably comprises a winged-fiber layer having high surface area fibers for increased absorption and strength and a meltblown layer for additional filtration. In one preferred embodiment the high surface area fibers have a middle region with a plurality of projections that define a plurality of channels, which increases the surface area of the fiber. In one preferred embodiment, the high surface area fiber has a specific surface area of about 140,000 cm/g or higher and a denier of about 1.0 to about 2.0. The high surface area fiber of the present invention is made using a bicomponent extrusion process using a thermoplastic polymer and a dissolvable sheath.

Composite filter media with high surface area fibers

The present invention is directed to a high surface area fiber and textiles made from the same. In one preferred embodiment the fiber has a middle region with a plurality of projections that define a plurality of channels, which increases the surface area of the fiber. In one preferred embodiment, the fiber has a specific surface area of about 140,000 cm/g or higher and a denier of about 1.0 to about 2.0. The fiber of the present invention is made using a bicomponent extrusion process using a thermoplastic polymer and a dissolvable sheath.

High surface area fiber and textiles made from the same

The present invention provides an apparatus for hardening a metal article, comprising a holding device, an energy beam generator pointed at the holding device for directing energy beams at the holding device, and a cycling system supporting the holding device, wherein the cycling system varies the location of the holding device relative to the energy beam generator. The apparatus includes an energy beam delivery instrument system positioned between the energy beam generator and the holding device so that the energy an energy beam delivery instrument directs the energy beam to the holding device. Also, the apparatus includes an auxiliary heating device engaging the holding device, wherein the auxiliary heating device heats the metal article independently from the energy beam.

Apparatus and method using fractionated irradiation to harden metal

The present invention provides an apparatus for hardening a metal article, comprising a holding device, an energy beam generator pointed at the holding device for directing energy beams at the holding device, and a movement system supporting the holding device, wherein the movement system varies the orientation of the metal article relative to the energy beam generator. The apparatus includes an energy beam delivery instrument system positioned between the energy beam generator and the holding device so that the energy an energy beam delivery instrument directs the energy beam to the holding device. Also, the apparatus includes an auxiliary heating device engaging the holding device, wherein the auxiliary heating device heats the metal article independently from the energy beam.

Apparatus and method for hardening metal by varying the engagement between irradiation and metal

The present invention provides an apparatus for hardening a metal article, comprising a holding device, an energy beam generator pointed at the holding device for directing energy beams at the holding device, and an auxliary heating device engaging the holding device, wherein the auxiliary heating device heats the metal article independently from the energy beam. The apparatus includes an energy beam delivery instrument system positioned between the energy beam generator and the holding device so that the energy an energy beam delivery instrument directs the energy beam to the holding device. Also, the apparatus also includes a transport system supporting the holding device, wherein the transport system varies the location of the holding device relative to the energy beam generator.

Apparatus and method using irradiation to harden metal

A radiation dosimeter includes an optical waveguide enclosing a radiation-sensitive material that changes color or color intensity with increasing amounts of exposure to high energy ionizing radiation. A light-transparent radiation-transparent light-transmitting member extends along the length of the optical waveguide, and is separated from the radiation-sensitive material by a light-opaque sidewall. Outside the light-transmitting member is a light-opaque shield that permits light to enter distal ends of the waveguide and the light-transmitting member, while permitting light to exit the proximal ends thereof, the light-opaque shield being transparent to high energy ionizing radiation. A light transmission comparator is positioned adjacent the proximal end of the light-transmitting member, the comparator including a plurality of transparent segments of different color or color intensity arranged in an array of consecutive light-to-dark shades, the color or color intensity of each segment being an exact reproduction of an actual dose level coloration that results from exposure of the radiation-sensitive material within the waveguide of a particular dose of radiation, so as to provide for accurate determination of radiation exposure to the optical waveguide under a variety of ambient lighting conditions.

Growing community of inventors

Rockville, MD, United States of America

Walter J Chappas