E.i. Dupont De Nemours and Company

Jon Ovitt Stanley

Donald William Gillespie

Melvin H Johnson

Jerry F Potter

Nitin Jivanlal Champaneria

Edward J Delawski

Terry Robin Cain

John Christopher Modla

Kevin Guy Bremser

A sensor for use with a yarn processing apparatus that includes at least one roll over at least a portion of the surface of which at least one yarn is conveyed is operative to generate an accumulation signal representative of a wrap accumulation of yarn circumferentially around the surface of the roll.

Wrap detection device

An apparatus and method for processing a synthetic yarn includes at least a one sensor for generating a signal representative of the actual velocity of the yarn at a point intermediate an upstream and the downstream rolls. The temperature of the upstream roll in accordance with the variation between the actual velocity of the yarn at the measurement point and a predetermined reference velocity. A second sensor may be provided to generate a signal representative of the actual velocity of the yarn at a second point intermediate the rolls. The controller may regulate the temperature of the upstream roll in accordance with the variation between the actual velocity at each measurement point and a predetermined reference velocity for that measurement point. Alternatively, the controller may regulate the temperature of the upstream roll in accordance with a relationship (e.g., the ratio) between the actual velocities as compared to a predetermined reference relationship (as, the ratio) representative of the relationship of the velocities of the upstream and downstream rolls, and the variation between the actual and reference velocities at at least one of the measurement points.

Draw point control arrangement

Apparatus is disclosed to prevent yarn from melting when stopped in a high temperature fluid texturing jet. A heat sink is attached to the jet body and thermally insulated from the conduit supplying the high temperature fluid to the jet.

Synthetic yarn bulking jet apparatus

Growing community of inventors

Seaford, DE, United States of America

Jon Ovitt Stanley