Mccoy-Ellison, Inc.

E.i. Dupont De Nemours and Company

John F Hagewood

Julius Darigo

Lawrence S Shea

Jerry T Charles

Bruce S McCoy

John M Single

Kurt W Niederer

Daniel W McCoy

Charles E Jackson, Jr

A process for preparing spin-oriented feed yarns that may be processed into flat yarns by draw-warping, involving the use of lower withdrawal speeds than customary hitherto for preparing spin-oriented feed yarns, and preferably low draw-tensions.

Process for preparing polyester feed yarns

In a textile warping system having one or more driven yarn engaging or yarn winding rolls, e.g. a driven warp beam, braking of each driven component is controlled by an individual pneumatic brake operated by a central programmable logic control system to brake the driven component according to a predetermined relationship of decreasing speed to elapsed braking time.

Apparatus for controlled braking of a driven textile material engaging

A yarn handling unit in a textile warping system having a plurality of rolls for training of a plurality of yarns to travel in side-by-side relation in series peripherally about the rolls, such rolls extending outwardly in a cantilevered manner from each opposite side of a central frame.

Yarn handling unit for a textile warping system

Apparatus for controlling tension in a traveling yarn includes sequential yarn-engaging driven and idler rolls, the driven roll having a stationary rotational axis and the rotational axis of the idler roll being movable in a defined path responsive to tension variations in the traveling yarn, a piston-and-cylinder biasing assembly for urging the idler roll into yarn tensioning engagement, and a potentiometer for sensing tension-responsive movement of the idler roll and operatively associated with the driven roll for varying its yarn driving speed to compensate for such tension variations. In one embodiment, the idler roll follows a horizontal path of movement and is spaced considerably from the driven roll for functioning as a yarn accumulator. In a second embodiment, the idler roll pivots through an arcuate path of movement centered about the driven roll.

Apparatus for controlling tension in a traveling yarn

Flat heather polyester yarns that provide soft pleasing fabrics that can easily be brushed (or napped) to enhance their aesthetics, on account of their unusually low tenacity, that consist essentially of cationic dyeable polyester filaments with homopolymer filaments, and corresponding spin-oriented feed yarns that may be processed into such flat yarns by draw-warping.

New heather yarns having pleasing aesthetics

Flat polyester yarns that provide soft pleasing fabrics that can easily be brushed (or napped) to enhance their aesthetics, on account of their unusually low tenacity, that consist essentially of cationic dyeable polyester filaments, and corresponding spin-oriented feed yarns that may be processed into such flat yarns by draw-warping.

New polyester yarns having pleasing aesthetics

Apparatus for controlling tension in a traveling yarn being delivered to a driven winding apparatus includes sequential yarn-engaging first and second idler rolls, one having a stationary rotational axis and the rotational axis of the other being movable in a defined path responsive to tension variations in the traveling yarn, a piston-and-cylinder biasing assembly for urging the movable roll into yarn tensioning engagement, and a potentiometer for sensing tension-responsive movement of the movable roll and operatively associated with the winding apparatus for varying its yarn winding speed to compensate for such tension variations. In one embodiment, the movable roll follows a horizontal path of movement and is spaced considerably from the stationary roll for functioning as a yarn accumulator. In a second embodiment, the movable roll pivots through an arcuate path of movement centered about the stationary roll.

In a textile draw warping system having independently driven sets of draw rolls and an independently driven warp beam, synchronous braking of the driven components is controlled by individual pneumatic brakes at each driven component operated by a central programmable logic control system to brake the driven components at respective rates of deceleration preset to maintain constant speed ratios between the driven components during braking. Auxiliary control of dynamic braking and driving of the several drive motors corrects deviations in the driven components' predetermined rates of deceleration.

Apparatus for controlled braking of a driven yarn engaging roll

A drawing apparatus for a textile draw warping system includes rotatable feed, swing, godet and take-up rolls about which a plurality of synthetic continuous filaments travel in sequential peripheral engagement. The godet and take-up rolls are driven at different relative speeds with the godet roll being heated above the glass transition temperature of the filaments to cause drawing of the filaments between the godet and take-up rolls. A heated contacts the filaments between the godet and take-up rolls to crystalize the drawn filaments. The godet and swing rolls are mounted for movement in respective arcuate paths which are mutually convex to one another for disengaging the filaments from the godet roll upon stoppage of the drawing system while maintaining constant filament tension to prevent overheating and degradation of the filaments. The platen is also movable away from the filament path upon system stoppages in coordinated relation to the decreasing speed of filament travel.

Growing community of inventors

Mathews, NC, United States of America

John F Hagewood