US2862351A

US2862351A - Textile apparatus

Info

Publication number: US2862351A
Application number: US576704A
Authority: US
Inventors: Jesse L Riley
Original assignee: Celanese Corp
Current assignee: Celanese Corp
Priority date: 1956-04-06
Filing date: 1956-04-06
Publication date: 1958-12-02
Anticipated expiration: 1975-12-02

Description

Dec. z, 195s J'. L. RILEY 2,862,351

TEXTILE APPARATUS Filed April 6, 1956 E r' n Patented Dec. 2, 1958 2,862,351 Y TEXTILE APPARATUS Jesse L. Riley, New Providence, N. J., assignor to `Celanese Corporationof America, kNew York, N. Y., a corporation of Delaware f Application April 6,1956, serial No; 516,704

3 claims. `(crm- 90) to a bobbin Winder or otherrsuita-ble take-upv or treatment device. One form of apparatus that has been used-for this purpose comprises a positively driven feedrolllont'o lmelt Vspinning `or similar processes,rthe yarn must be drawn j i from the spinning apparatus continuously and forwarded which the yarn is guided as it leaves the spinning apparatus. The yarn makes fsomewhat more than one full wrap around the feed roll andisjthen drawn from the feed roll to the take-up device When the take up is to be dotted, the yarn isubroken between the feed rolln and the take up to per-mit Vdoifing`.u However, the: feedroll 5 Acontinues to draw theyarn from the spinning apparatus and such yarnmiswound on the feed r-oll.

Associated with the feed'roll is a back 4guide spaced .from the surface of the feed roll and carrying a yarn guiding member through which the yarn is threaded at some intermediate point as it moves around the feed roll. The yarn guiding member is displaced from the plane in which the yarn travels between the spinning apparatus and feed roll. The said member thus acts to prevent the yarn rst contacting the feed roll from overlapping or contacting the yarn leaving the feed roll, which overlapping or contacting would damage or even possibly break the said yarn. While the back guide is essential to the successful functioning of the feed roll, the passage of the yarn therethrough increases the tension developed in the yarn which is objectionable, particularly when freshly spun yarn is being handled, since the freshly spun yarn is quite sensitive to stretching and the like under the influence of excessive tensions. The amount of tension introduced into the yarn by the back guide depends, at least in part, on the distance between the surface of the feed r-oll and the back guide which determines the angle included by the yarn in passing through the said guide. As the distance between the surface lof the feed roll and the back guide is increased, the included angle becomes smaller and the tension developed in the yarn rises. As the distance is decreased, the included 4angle becomesv larger and the tension falls. However, there has heretofore been a practical limit to the minimum distance between the surface of the feed roll and the back guide owing -to the need for providing clearance between thevback guide and the yarn that accumulates on the feed roll during the doffing of the take up or in the event of a yarn break. Under these circumstance, it has not hitherto been possible to position the back guide in very close proximity to the surface of the feed roll so that the tension developed in the yarn by its passage through the back guide has always exceeded a certain minimum.

-It is an important object of this invention to provide a textile apparatus for continuously feeding a yarn which will be free from the foregoing and other difficulties,

Yits source to another point comprising a positively driven feed yroll onto the surface of which the yarn is guided as it leaves its source. Associated with the feed r-oll is a back guide carrying a yarn guidingmermber that is displaced with respect to the planein which the yarn travels from its source to the feed roll, The back guide is so constructed as to be yieldably urged by gravity, a spring, or the like toward the feed roll to bring the yarn guiding member to a predetermined position in close proximity to the surface of the feed roll. The back guide, however, is so designed that when suicient yarn accumulates on the feed r-oll to contact the backV guide, the said back guide will be moved awayy fromthe surface of the feed roll by the said yarn. AIn this way, it is possible to position the back guide in close proximity to the surface of the feedV roll so .that the tension developed in the yarn ./duringitspassage therethrough will be held to a minimum, yet no diiculties will be encountered asthe result of vthe accumulation of yarn on the feed r-oll.

' .',Inone embodiment of the invention,.the back guide comprises a `hinged member in which one portion is mounted to rotate about an axis Asubstantially parallelto somewhat above `the.horizontal` plane passing. through theV Vlongitudinal"axis'of the feed roll. When sufficient yarn accumulates on the feed roll to contact the back guide, it will cause the rotatable portion of said hinged member to rotate and thereby move said back guide away from the surface of the feed roll. Y

A preferred embodiment of this invention is shown in the accompanying drawing wherein Fig. l is a side elevation of the apparatus, and

Fig. 2 is a plan view of a portion of the apparatus shown in Fig. 1.

Referring now to the drawing, the reference numeral 11 designates a yarn which emerges from the lower portion of a spinning cabinet 12, The yarn 11 passes to the upper portion of a positively driven feed roll 13, passes around the lower portion of said feed roll, then to a back guide indicated generally by reference numeral 14, and then returns to the feed roll 13.V The back guide 14 comprises a hinge 15 which is so designed and positioned that the center line passing through its two

halves

16 and 17 normally lies, under the influence of gravity, in a common horizontal plane somewhat above the horizontal plane passing through the center of the feed roll 13. The front half 17 of the hinge 15 is adapted to rotate about an axis parallel to the longitudinal axis of the feed roll 13. The hinge 15 is supported by Vmeans of a threaded rod 18 that is clamped to the machine frame 19 by means of nuts 21. Secured to the front half 17 of the hinge 15 is a holder 22 in which is carried a yarn guide 23 positioned in a horizontal plane somewhat above the hori` zontal plane passing through the center of the feed roll 13 and preferably made of hard material having a' low coeiicient of friction.

As shown most clearly in Fig. 2 of the drawing, the back guide 14 is displaced from the plane in which the yarn travels from the spinning cabinet 12 to the feed roll spinning cabinet 12. The yarn 11, after making somewhat more than one full turn around the feed roll 13,

it will accumulate on the feed roll'13.v When sufficient .t

yarn has accumulated on the feed roll' to contact; holder 22 of the back guide 14, it will simply raisefthe front portion 17 of the hinge 15 to the position shown in dotted lines in Fig. 1 of the drawing. Then, when the mass of yarn is removed from-the feed roll 13, the front portion 17 of the hinge 15 will return to its original position under the influence of gravity. With this arrangement, it is accordingly possible to place the hack guide 14 in very close proximity to the surface of the feed roll 13 and thereby reduce to a minimum the tension developed in the yarn 171 as it passes through said back guide.

It is to be understood that the foregoing detailed description lismerely given by way of illustration and that many variations may be made therein without departing from the spirit of my invention.

Having described my invention, what I desire to secure by Letters Patent is:

l.. In a textile apparatus for continuously feeding a vyarn from Vits`source to another point, va positively driven feed roll, and a back guide comprising a hinged member having a portion mounted to rotate about an axis substantially parallel to the longitudinal axis of the feed roll, and

a yarn guiding member displaced with respect to the plane v in which vthe yarn travels from itsv source to the feed roll.

2. In a textile apparatus for continuously feeding a yarn from itsv source to another point, a positively driven feed roll, and a back guide comprising a hinge having its two halves lying in a horizontal plane, supporting means fixed to the rear half of said hinge, and a yarn guiding member carried by the front half of the hinge, the front half of said hinge being rotatable upwardly about an axis parallel to the longitudinal axis of the feed roll and being urged by gravity to its horizontal position whereby yarn yaccumulating on the surface of the feed roll can rotate said front half and move the back guide away from the surface of the feed roll.

3. In a textile apparatus for continuously feeding a yarn from its source to another point, a positively driven feed roll, and a back guide comprising a hinge having its two halves lying in a horizontal plane above the horizontal plane passing through the longitudinal axis of the feed roll, supporting means fixed to the rear half of said hinge, and a yarn guiding member displaced with respect to the plane in which the yarn travels from its source to the feed roll carried by the front half of the hinge in apredetermined position in close proximity to the surface of the feed roll, the front half of said hinge being rotatable upwardly about an axis parallel to the longitudinal axis of the feed roll and being urged by gravity to 'its horizontalposition whereby yarn accumulating on the surface of the feed roll can rotate said front half and move the back guide away from the surface of the'feed roll.

p References Cited in the -le of this patent UNITED STATES PATENTS