US2875502A

US2875502A - Apparatus for curling textile yarns

Info

Publication number: US2875502A
Application number: US347979A
Authority: US
Inventors: Howard W Matthews; William K Wyatt
Original assignee: Turbo Machine Co
Current assignee: Turbo Machine Co
Priority date: 1953-04-10
Filing date: 1953-04-10
Publication date: 1959-03-03
Anticipated expiration: 1976-03-03

Description

March 3, 1959 w. MATTHEWS ETAL 2,875,502

APPARATUS FOR CURLING TEXTILE YARNS I Filed April 10, 1953 3 Sheets-Sheet 1 YINVENTORS. H0 Ward WMafi/ie W$&

WilliamfITWya ZZ",

BY WST TORNEYSQ I March 3, 1 9 H. w. MATTHEWS ET AL 2,875,502

v v APPARATUS FOR CURLING TEXTILE YARNS Filed April 10, 1953 3 sheets sheet 2 INVENTORS. Howard WMafi/IeWs & William 11'. Wail,

7 BY mm ATTORNEYS.

w. MR THEws ETAL APPARATUS FOR CURLING TEXTILE YARNS March 3, 1959 I5 Sheets-Sheet 3 Filed April, 10, 1955 H QINVENTORS.

H0 Ward W/Uafi/Je W8 .62.

United States Patent 2,875,502 APPARATUS FOR 'CURLING TEXTILE YARNS Howard W. Matthews and William K. Wyatt,

Pa., assignors to Turbo Machine Company, Lansdale, Pa., a corporation of Pennsylvania Application April 10, 1953, Serial No. 347,979

4 Claims. (Cl. 28-1) This invention relates to apparatus for curling textile yarns, particularly synthetic yarns of nylon and the like.

The chief aim of our invention is to provide a simple and reliable apparatus for curling textile yarns, of the kind referred to, continuously and rapidly incident to winding them on spools or cops in preparation for use in the production of woven or knitted fabrics.

Other objects and attendant advantages will appear from the following detailed description of the attached drawings wherein:

Fig. l is a fragmentary view in perspective of a yarn curling apparatus conveniently embodying my invention. Fig. 2 is a fragmentary view of a portion of the apparatus, likewise in perspective, drawn to a larger scale.

Fig. 3 is a fragmentary view in top plan with the curling element of the apparatus shown in horizontal section.

Figs. 4 and 5 are perspective views of said element.

Fig. 6 is a view like Fig. 3, but showing the curling element retracted to facilitate initial threading of the yarn in the apparatus; and

Fig. 7 is a view like Fig. 1 showing an alternative embodiment of our invention.

As herein exemplified, our improved yarn curling apparatus comprises a support in the form of a plank 10 which is horizontally sustained by arms 11 at the front of a winding mechanism, said mechanism including a longitudinal shaft 12 with drive wheels 13 for rotating a take-up spool S whereon the yarn Y is collected after being curled, and a traversing guide 14 for distributing the yarn on the spool. Mounted on plank 10 is a fiat sided post 15 which is wedge shaped in cross section, radial to and rigid with a circular base 15a having, a pendent axial stem 15b (see Figs. 4 and 5) engaged downwardly into said plank. Clamped to one side face of the post 15 by a pair of vertically-spaced screw secured plates 16 is a vertically arranged knife-like blade 17 having a sharp edge 17a. As shown, the blade 17 is so adjusted that its edge 17a projects somewhat beyond the wedge edge of the post.

In the interval between the clamp plates 16, the post 15 is provided, for a purpose presently explained, with a narrow groove 18 which extends transversely of one side and of the front and back of said post. Stationed respectively beyond opposite sides and rearwardly of the post 15 on the plank 10 is a pair of laterally-

spaced guide eyes

19 and 20; and fixedly supported on said plank between the post and the eye 19 is a yarn tensioning device 21 which comprises a cylindric base component 22, and a cap disk 23 capable of free rotative movement about an upward axial stud projection 24 of said base component. Also mounted on plank 10 is an electric heating device 25 comprising a small loop 26 of resistance wire whereof the terminals are secured in a block 27 of insulation at the top of a stand 28, said device being so located relative to post 15 that its loop extends into close proximity to the cutting edge of blade 17 at the elevation of the groove 18 when said post is normally positioned as shown in Figs. 1, 2 and 3. When so positioned, the

Souderton,

2,875,502 Patented Mar. 3, 1959 post 15 is held against accidental rotation by its own weight, and through friction of its basal disk 15a with the table 10, the pull on the yarn being light and its path being in a straight line between the curling edge 17a and the guide 20.

To retract the blade 17 from the heating loop 26a and facilitate initial threading of the yarn Y to be curled in the apparatus, the post 15 is turned by hand to the position in which it is shown in Fig. 6. With this preparation, the yarn end Y taken from a source of supply (not shown) is drawn upward from beneath the plank 10, then passed through the guide eye 19, then beneath the disk 23 of tensioning device 21, then around the groove 18 in post 15, then through the, guide eye 20, then up to and through the traversing guide 14 of the winding mechanism and finally attached to the collecting spool S. Post 15 is thereafter turned back to the operative position in which it is shown in Fig. 3. All being now in readiness, electric current is turned on to heating device 25 and the winding machine set in motion. It is to be noted that due to the location of the

guide eyes

19 and 20 relative to the post 15, the yarn Y, under the pull of revolving spool S, is drawn across the curling edge of the blade 17 at a very sharp angle'immediately after being somewhat softened or plasticized by the heat from the wire loop 26 of the heating device 25, it being maintained all the while under a light but definite tension by the tensioning device 21. In traversing the interval between the post 15 and the winding spool S, the yarn Y is afforded an opportunity to cool, with the result that the curls formed therein as at C in Figs. l-3 incident to its passage about the edge of the blade 17, become set against subsequent deformation. The extent to which,

passed about a grooved roll 32 on a horizontal spindle V 33 whereof the ends are rotatively supported in notched brackets 35 on the winding machine. Also atfixed to spindle 33 is a plain faced roll 36 which is in frictional engagement with a drive wheel 37 on shaft 12 of the winding machine. From roll 32, the yarn Y is directed by the guide 19 on the plank 10 to the curling device from whence it passes through the fixed guide 20 and the traversing guide 14 to the receiving spool S. Thus, in this instance, the yarn Y is drawn from the supply source at a definite rate and fed to the curling device by the action of the roll 36, the required tension being maintained on the yarn through the pull induced by the rotating collecting spool S.

Having thus described our invention, We claim:

1. In apparatus for curling textile yarn, a curling means comprising a fiat-sided post which is wedged shaped in cross section and a sharp-edged blade adjustably and removably secured to one of the fiat sides of the post, said blade having its sharp edge projecting beyond the wedge point of the post to provide a curling edge; a pair of spaced yarn guides disposed behind the post to cause the yarn to pass at an acute angle about the curling edge; and a heating means positioned to heat the yarn just before its passage about the curling edge.

2. Yarn curling apparatus according to claim 1, where in the post is provided in the flat side opposite to that occupied by the blade with a transverse groove for traverse by the yarn after it has passed about the curling edge.

3. Yarn curling apparatus according to claim 1, where- 3. curling edge .as considered with respect to, the direction of travel of the yarn.

4. Yarn curling apparatus according to claim 1, wherein the heating means is inthe form of a loop of elecbe turned through a partial rotation for retraction of the curling blade away from the heating loop to facilitate threading of the yarn in the apparatus.

trically-heated resistance wire positioned closely adjacent 5 References Cited in the file of this patent the blade of the curling means slightly rearward of the UNITED STATES PATENTS curling edge as considered with respect to the direction 2,245,874 Robinson June 17, 1941 of travel of the yarn; and wherein the post is radial to i and rigid with a basal disk having a pendent axial stud 10 FOREIFHTI PATENTS rotatively engaged in the support,'whereby the post can 558,297 Gr i n, Dem 1943