E.i. Dupont De Nemours and Company

Harold F Staunton

Paul W Yngve

Peter Popper

Donald W Edwards

Robert Edward Taylor

Donald E Hallam

Donald M Sadler

William Charles Walker

James K Odle

Todd J Savidge

Yashavant V Vinod

Mark Stephen Edwards

Steven K Shibata

Bhagya Chandra Sutradhar

Howard W Anderson

Christopher Roger Whitfield

Judith E Hodgson

Richard D Rheutan, Jr

John B Carberry

Method and apparatus for making bristle subassemblies

An apparatus for making alternate S and Z twist plied yarn from individual singles yarns. The apparatus twists the singles yarns as they move in a path through the process, twisting the individual yarns in either an S or Z direction. The bonding of the ply-twisted yarns at a node while applying twist forms a bond characterized by a dense region of filaments adhesively joined together where one of the strands overlaps another strand, followed by a less dense region along the one strand where fewer filaments are adhesively joined, followed by another dense region.

Apparatus and method for forming alternate twist-plied yarns and product

An elongated pile article having a support strand for attachment to a plurality of yarn bundles, the yarn bundles including a dense portion with the filaments bonded to each other and bonded to the support strand, pile surface structure comprised of a plurality of elongated pile articles placed one next to the other, and a method and apparatus for making the elongated pile article.

Method and apparatus for making a pile article and the products thereof

Crystallization of adipic acid using low intensity ultrasonic agitation during crystallization results in purer product that is more readily handled. Apparatus for carrying out the process is also disclosed.

Crystallization of adipic acid

More uniform and more rapid quenching and coagulation of filaments is achieved by contacting the filaments in a chamber with coagulating liquid and generating pressure fluctuations in the liquid at high frequency sonic or ultrasonic frequencies.

Quenching and coagulation of filaments in an ultrasonic field

A process and apparatus for cutting tufted loops of yarn of a fabric, such as a carpet, by applying sufficient energy from an ultrasonically vibrating horn, operating with either a shearing or a pincer action in cooperation with a mechanical device, either or both having a cutting edge, to cause at least some of the filaments in said yarns to soften and fuse to adjacent filaments during cutting of said tufted loops.

Ultrasonic cutting of fabric tufts to provide improved retention of tuft

A process for making alternate S and Z twist plied yarn from individual singles yarns includes the steps of tensioning the singles yarns as they move in a path through the process, twisting the individual yarns in either an S or Z direction, stopping the forward movement of the yarn, then bonding the ply-twisted yarns at a node while applying twist, stopping the twisting operation, then repeating the procedure while twisting in the opposite direction.

Apparatus and process for forming alternate twist plied yarn and product

Apparatus and process for forming alternate twist plied yarn

A method for intermittently applying a liquid to a threadline wherein varying the amplitude of vibration of an atomizing surface of an ultrasonic vibrator is the vehicle for atomizing and propelling the liquid onto a threadline passing in close proximity to the atomizing surface.

Method for applying liquid to yarn

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Avondale, PA, United States of America

Harold F Staunton