Whip roll for air jet loom weaving of resin compatible yarn

Details Whip roll for air jet loom weaving of resin compatible yarn Whip roll for air jet loom weaving of resin compatible yarn

2000-08-16

2001-09-04

Falik, Andy (Department: 3765)

Textiles: weaving

Warp manipulation

Feeding

Reexamination Certificate

active

06283164

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to an air jet loom, and in particular to weaving yarns having a resin compatible coating on an air jet loom.
BACKGROUND OF THE INVENTION
Air jets looms are widely used for high speed fabric weaving. Typically, a plurality of warp yarns are wound around a loom beam positioned at one end of the air jet loom. The warp yarns are unwound from the loom beam and extend the length of the loom. A whip roll is positioned to support the sheet of warp yarns as it advances to the weaving position of the loom and ensure that the yarn is delivered to the loom at the same weaving angle as the loom beam diameter changes during weaving. The whip roll also maintains the proper tension in the warp yarn during the weaving operation. One or more weft yarn feed systems deliver, i.e. insert, weft yarn into a shed formed by warp yarns using a main air jet nozzle assisted by groups of relay nozzles disposed across the warp shed, as is well known to those skilled in the art.
Depending in the nature of the warp yarn, problems can occur as the yarn is delivered from the loom beam to the loom. For example, the warp yarn can to move and roll laterally along the whip roll. This, in turn, can result in adjacent warp yarn strands becoming entangled and twisted together as they advance into the loom. If the yarns break as they enter the loom, the weaving operation will stop. To address this problem, grooved whip rolls have been used to stabilize the warp sheet. It has been observed that this rolling and entanglement problem is of particular concern where the weaving operation uses warp yarn having a resin compatible coating. These coatings are typically tacky, which adds to the potential for the yarns to stick together and break as they enter the loom. It has been further observed that fine yarns, e.g. E-225 and D-450 yarns, with resin compatible coatings that are used as warp yarn in a weaving operation exhibit a greater potential to become entangled because of the higher warp yarn density associated with such fabrics.
It would be advantageous to provide a weaving system that ensures continuous, uninterrupted feed of the warp yarn having a resin compatible coating.
SUMMARY OF THE INVENTION
The present invention provides a method of delivering warp yarn into an air jet loom, comprising the steps of: providing a loom beam comprising warp yarn having a resin compatible coating; drawing warp yarn from the loom beam; contacting the warp yarn with a whip roll having a reduced surface area such that the warp yarn contacts at least a portion of the reduced surface area of the whip roll; and directing the warp yarn into an air jet loom. In one non-limiting embodiment of the invention, the reduced surface area of the whip roll is no greater than 50% of its equivalent surface and is textured, the reduced surface area of the whip roll includes a plurality of grooves, the warp yarn is a fine yarn provided at a warp yarn density of at least 50 yarns per inch and forms a warp shed, and a fill yarn having a resin compatible coating is inserted into the warp shed.
The present invention further provides a fabric made according to the above described method.


REFERENCES:
patent: 1705637 (1929-03-01), Deleu
patent: 2966930 (1961-01-01), Pfarrwaller
patent: 4121625 (1978-10-01), Porter et al.
patent: 5305802 (1994-04-01), Fehrenbach
IPC-EG-140 “Specification for Finished Fabric Woven from “E” Glass for Printed Boards”, publication from Institute for Interconnecting and Packaging Electronic Circuits, Jun. 1997, p. 1.
The American Cotton Handbook, vol. Two, 3rd Edition, pp. 633-641.
U.S. Serial No. 09/620,526 entitled “Impregnating Glass Fiber Strands and Products Including the Same”, filed Jul. 20, 2000, assigned to PPG Industries Ohio, Inc.

Affiliated with

Also associated with

Rating

Whip roll for air jet loom weaving of resin compatible yarn does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Whip roll for air jet loom weaving of resin compatible yarn, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Whip roll for air jet loom weaving of resin compatible yarn will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2512069