US2855747A

US2855747A - Making a transfer tail

Info

Publication number: US2855747A
Application number: US375401A
Authority: US
Inventors: John T Rich
Original assignee: American Enka Corp
Current assignee: Akzona Inc
Priority date: 1953-08-20
Filing date: 1953-08-20
Publication date: 1958-10-14
Anticipated expiration: 1975-10-14
Also published as: ES214507A1

Description

- Oct-14, 1958 J. 'r. RICH 2,355,747

MAKING A TRANSFER TAIL Filed Aug. 20. 1953 2 SheetS -Sheet 1 Pig. 1.

Fig. 2.

INVEN TOR.

John T. Rich "Y 77 Z2 A TTORNE Y Oct. 14, 1958 J. T. RICH 2,855,747

MAKING A TRANSFER TAIL Filed Aug. 20. 1953 2 Sheets-Sheet 2 Fig.3. q 23 Fig.4.

IN VEN TOR.

ohn T. Rich A TTORNE Y aim U.

2,355,741 A- TR. 51 131 23.:T ML.

' 5 John T. Rich,- Morristown, Tenn as s ignor. to Americgn; Er ka-Corporation, Enka, Ni'C; a corporatiomof D ela ware.

Appli a on Au yst2 n195 1. ialN dfisfWL.

7 'Claims; or; 57 -34 This invention relates; to; thread collection; and; more particularly to the ;collection of a; continuously ,running hre d n w n a ne,

With theadvent of continuous spinning, 1, numerous; problemshave presentedthemselves; in connection, with; thecollection-ofi the; continuously issuing threads. The; take-up used in-such aprocess must -beprovided. with-1a; means for disp-osingof the running threads during;the;;, dofiing operation. Whendesirable; such a;take-up,must's also be provided. with ameans for producing asrnagazinei wrap ortransfer tail on the bobbins 1 used;;to. collect the; thread.

It hashereto-fore been proposed to utilize, on a-thread take-up for a continuous-process, a; bobbimcharacterizedxt by having oneslitted flange betweenthe ends ,-.of thGtCQI'CiT on which thethread is,.wound.1 The, tail onendzof-the thread is then maintained wholly-outside ofrthe threadgg package. For. example,v see 1 U. 8;... Patent 2-;43.1,323.M While theuse of such a specially constructed tbobbinihase been. found, :to :have certain; advantages,=1 itz-hassbeen robe. served that the loose. endof the.transfer;tailrtendsntot be swung outwardly by centrifugal force duringithe winds; ingoperation and. become damaged 1or.-dirty.:' Also, the length of transfer, tails-produced in such anoperation varies considerably from -one.bobbin to.another andrthisss is undesirable.

It :is an object of the-.present'invention .toprovide' an. methodand apparatus for dofiing a twistingmachine:

Another object of the invention is toprovide-a method: and apparatus for, producing 'a-transfere-tail. Ion -.a bobbin-- used to collect thread 1 produced in a: continuous. manner.

A: furtherobject .offithelinventionis to.=providet-. a. method and apparatus for:producing transfer tails of o substantially uniform length on theabobbinslused for collecting continuously produced threads.-v

Other objects will appear .fromthe -following"des criptions' when: taken in l conjunction with the. annexd draw ings wherein:

Figure 1 .is t a schematic perspectiveof -a-singlesposition on-a ring.twisting.machinegnodified' in-accordaneewith; a 1 preferredfembodiment of the :present invention; I

Figure -2iis a schematic perspective similautoFigu-re l'ish'owing abobbin in'tplace onthe twister spindleg Figure/:3 iswa sectionalv view takenalong the centralaxis of the-bobbin used; in the :present invention;

Figure 4is-a perspective viewof- 'a special tail con-- fining sleeve used iin-:the.presentinvention;-

Figure 5 is a plan view of a special thread cutter use in the present ginventiom'and Figure 6 is aviewli partelevation ,of -thg Cutter shown in Figure 5.

In accordance with the present-invention, a tailg con; fining sleeve is attached tothe ring twiste r oonc'e. ally surrounding the spindleatthe baseofjthe bob'b An extensiongon the bottom-of the bobbin which cont ns; the transfer tailifits insidethis sleeve. In this manner the transfer taiFis; maint-ainedwithin the sleeve in a clean andgundamaged condition as the' twisting operation pro; ceeds. Bythe use of'a pneumatic'collection device and a special thread cutter in combination with the tail con- ICC finingsleeve; clean undamaged transfer tails of substantially uniform length are produced.

Referring now to Figures 1 and 2, a continuously running thread 10'passes through guide 11 mounted over spindle;1210n a ring twister. Spindle 12 is driven by suitable means (not shown). During the dofiing operation, as shown in Figure 1, the thread 10 is takenup by means of a pneumatic thread-suction collection device schematically illustrated at 13. Collection device-13 may be ofany suitable design, such as the one described in Application Serial No. 237,526, filed July 19, 1951 now- U. S. Patent No. 2,661,588; Disposed in the thread pathbetween collection device 13 and-spind1e'12 is a thread;

cutter schematically indicated 'at14.'

Cutter 14, the details of which are shownmore clearly inFigures 5 and '6, comprises an- L-shaped supporting member 15havingmounted thereon -a thin resilient metal cutting blade 16. The cutting edge of the blade 16 is indicatedat 19; Cutting 'blade-16'is held in placeby screw 17 which passes through a slot in blade 16 to the ,wall of supporting member 15. As shown by dotted lines in Figure 6, a portion of the supportingrnember 15 is cut away to provide an-opening through whichthe thread can pass-to the cutting edge 19."

It will be seen from Figure 5' that the cutting edge 19 normallylies barely in contact with shoulder l 8jjof' supporting member lst With a thread running through the devic'e from the top of the drawing toward the bottom ofthe'drawing in Figure 5; blade 16," which is movable at-its-' unsupported end, tends away from shoulderlSf. and-the passage of the thread; through the ,device isnot hindered; Howevenif the direction of'threadtravel is reverscdand the thread begins to travel'through the. device from-the bottom of the drawing to the top ofthe drawing in Figure 5, cutting edge 19 is immediately drawn by-the friction of the running thread into contact with shoulder l8 and the thread is severed at once. Thus itis seen that in the arrangement shown in Figure l'the cutter l4 permits thread 10 to continue:to pass to. collection device 13 but as soon as an, attempt is made to reverse the direction of thread travel and withdraw the thread 10*from the collection device13 toward the twister spindle -12 the thread is severed. The cutter 14 per se is.

- notpart of the present invention; such. adevice is well" known in the textile industry and maybe commercially obtained.

As seen more clearly in Figure 3, the bobbin usedfin the presentinventi-oncomprises a central hollow core portion 20; a lower flange 2liand an,upper fiangeZZ,

At the top of the bobbin is a grippingkn-ob 23. As ,seen in Figure 2, lowerfiange 21 contains .a slot 24whichj extends from the periphery of the flange to core. portion 20 of the bobbin.

The under side of flange 21 is provided with a relatively thick'rirn 22. concentrically disposed on thetunder side of lower flange 21 is hub portion 26. Hub portion 26 contains a shallow. groove 25. ar-ound'itsperiphery adapted *to carry a transfer tail.

Referring now to Figure 4, there is, shown, cylindrical metal sleeve member 30.. Extending frornthetop of twisting; machine.

It will be apparent that when vsleeve-fitlis mounted,

around twister spindle 12 in the position shown, in Figure ,1, the lower portion. of .the spindle 12 Will beco ne centrically envelopedby the sleeve 30. More. specifi-, cally; the major portion of hub portion 26 of the bobbin will be enveloped by sleeve 30 when the bobbin is in Patented Oct.- 14, 1958 1 'then removed as shown in Figure 1.

is disposed slightly beneath the lowest part of slot 31 to hold the running thread in the slot. 7

When the bobbin is placed on the spindle 12 as shown in Figure 2, the upper portion of sleeve 30 extends up.

into the annular recess formed between rim portion 22 and hub portion 26 of the bobbin flange 21. With the bobbin in place on the spindle, the lowest part of the slot 31 is disposed opposite the groove 25 on hub portion 26.

In this manner the groove 25 adapted to contain the transfer tail is closely surrounded by sleeve 30 and the' transfer tail is accordingly confined to a small area and maintained clean and undamaged. If it happens that the tail escapes the confining sleeve 30 it will nevertheless be contained to a certain extent by the rim 22 on the lower side of flange 21.

Bearing in mind the foregoing description of the various parts of the present apparatus, an explanation will now be given of a typical doffing operation. When a bobbin has been filled and is ready to be doifed, the spindle is stopped, the running thread is severed and taken immediately to temporary collecting device 13. The thread may then be placed in cutter 14. The filled bobbin is During this time the running thread continues to be collected by collection device 13. If it should become necessary to thread the running thread through the ring again the procedure set forth in U. S. Patent 2,572,138 may be used.

In order to build a transfer tail and start the thread on an empty bobbin the following procedure is followed. The thread running to the temporary collecting device 13 is threaded through the traveler 36. With the thread running in this position a fresh bobbin is placed on the spindle and the running thread is slipped into the slot 24 in the bottom flange of the bobbin. The bobbin is then rotated slightly manually so as to cause the slot 24 to pass back and forth over. the slot 31 in sleeve 30. This results in the thread being caught in slot 31. The path of thread travel at this stage of the operation is as follows: through pigtail 11, traveler 36, slot 24, slot 31, cutter 14, to collecting device 13.

Rotation of the spindle 12 is then commenced. When this occurs, two things happen: (1) the oncoming thread immediately starts to build up on the core portion 20 of .the bobbin, and (2) the thread is severed by the cutter 14. As the spindle continues to rotate, the loose end is withdrawn from the cutter 14 through the slot 31 in sleeve 30 into the interior of the sleeve 30 where it is wound onto groove 25 to form the transfer tail.

By suitably arranging the cutter 14 so that it is always spaced the same distance from spindle 12, transfer tails of uniform length will be produced on all bobbins. Each spindle on the twisting machine may be provided with a cutter-collection device assembly or optionally one such assembly may be used to service a number .of spindles by moving the assembly from one spindle to another as the dofling operation proceeds.

It is to be understood that various modifications might be made in the foregoing description without departing from the spirit of my invention.

What is claimed is:

1. In a ring twister for winding yarn on a flanged bobbin a barrel of which has an extension thereon the combination of a spindle, a cylindrical sleeve disposed coaxially around the base of said spindle and adapted to surround a tail-containing portion of said extension, said sleeve having a slit in the wall thereof and means capable of exerting a yarn drawing action in a horizontal plane not higher than said slit.

2. In a ring spinning device for winding continuously produced yarn on a flanged bobbin the barrel of which has an extension thereon the combination of a spindle,

a cylindrical sleeve disposed coaxially around the base of said spindle and adapted to surround a tail-containing portion of said extension, said sleeve having a slit in the wall thereof, a temporary collection device capable of exerting a drawing action in a horizontal plane not higher than said slit and a thread cutter in the thread path between said slit and said temporary collection device.

3. In a ring spinning device for winding continuously produced yarn on a flanged bobbin the barrel of which has 'anextension thereon the combination of a spindle, a cylindrical sleeve mounted coaxially around the base of said spindle and adapted to surround a tail-containing portion of said extension, said sleeve having a slit in the wall thereof, a temporary collection device capable of exerting a drawing action in a horizontal plane not higher than said slit and a thread cutter in the thread path between said slit and said temporary collection device.

4. In a ring spinning device for winding continuously produced yarn on a flanged bobbin the barrel of which has an extension thereon the combination of a spindle, a cylindrical sleeve mounted coaxially around the base of said spindle and adapted to surround a tail-containing portion of said extension, said sleeve having an angular slit inthe wall thereof, a temporary collection device capable of exerting a drawing action in a horizontal plane beneath said slit and a thread cutter in the thread path between said slit and said temporary collection device.

5. In a ring spinning device for winding continuously produced yarn on a flanged bobbin the barrel of which has an extension thereon the combination of a spindle, a cylindrical sleeve mounted coaxially around the base of said spindle and adapted to surround a tail-containing portion of said extension, said sleeve having an angular slit in a portion of the wall thereof, a temporary collection device capable of exerting a drawing action in a horizontal plane not higher than said slit and a thread cutter in the thread path between said slit and said temporary collection device.

6. In a ring spinning device for winding continuously produced yarn on a flanged bobbin the barrel of which has an extension thereon the combination of a spindle, a cylindrical sleeve mounted coaxially around the base of said spindle and adapted to surround a tail-containing portion of said extension, said sleeve having an angular slit in a portion of the wall thereof, a temporary pneumatic collection device capable of exerting a drawing action in a horizontal plane not higher than said slit and a thread cutter in the thread path between said slit and said temporary collection device.

7. In a ring spinning device for winding continuously produced yarn on a flanged bobbin the barrel of which has anextension thereon the combination of a spindle, a cylindrical sleeve mounted coaxially around the base of said spindle and adapted to surround a tail-containing portion of said extension, said sleeve having an angular slit in a portion of the upper wall, a temporary pneumatic collection device capable of exerting a drawing action in a horizontal plane beneath said slit and a thread cutter in the thread path between said slit and said temporary collection device, said thread cutter being so constructed that the thread is instantaneously severed when an attempt is made to withdraw the running thread from the temporary collection device toward said slit.

References Cited in the file of this patent UNITED STATES PATENTS 1,976,332 Curtis Oct. 9, 1934 2,125,168 Leclercq July 26, 1938 2,261,239 Elvin et al. Nov. 4, 1941 2,428,081 Keight et al. Sept. 30, 1947 2,431,323 Graybeal Nov. 25, 1947 2,542,106 Ayala Feb. 20, 1951 2,572,138 Griset Oct. 23, 1951 2581.012 Garnett Jan. 1, 1952