US2246990A - Apparatus for spinning rayon - Google Patents

Description

June 24,1941. w. WUPPERMANN 2,246,990

' APPARATUS FOR SPINNING RAYON Filed Nov. 9. 1937 6 Sheets-Sheet 2 I .717 venior:

June 24, 1941. w. WUPPERMANN 2,246,990 I APPARATUS FOR SPINNING RAYON Filed Nov. 9, 1937 e Sheets-Sheet 3 June 24,1941. w. WUPPERMANN 2,246,990

APPARATUS FOR SPINNING RAYON .Filed Nov. 9, 1937' s Sheets-Sheet 4' i/iaraav.

June 24, 1941. w. WUPPERMANN APPARATUS FOR SPINNING RAYON 7 Filed Nov. 9, 1937. I a Shets-Sheet '5 7n. 2:: n for:

J ne 24, 194 w. WUPPERMANN 90 APPARATUS FOR SPINNING anon Filed Nov. 9, 1937 s Sheets-Sheet 6 Javsnfor:

Mfln E .19 W2 Patented June 24, 1941 UNITED STATES PATENT OFFICE My invention relates to improveme APPARATUS FOR SPINNING BAYON Wilhelm Wuppermann, Berlin-Zehlendorf,

Germany Application'November 9, 1937. Serial No.-1'l3,691-

In Germany May 15, 1937 12 Claims. (01. 18-8) paratus for spinning rayon, and more particuline 8-4 of Fig. 7,

larly in apparatus of the type comprising a rotary tubular container adapted to have the coaguthe line 9-9 of Fi la-ting bath circulated therethrough, and anozzle Fig. is a fragmentary sectional elevation for thespinning liquid such as viscose fixed withshowing another modification of the spinning apin said container and rotatable therewith, the paratus,

spinning liquid or viscose delivered from the nozzle in the form of filaments being coagulated line ll-ll of Fig. 10,

within the said container and twisted when it 10 Fig. 12 is a fragmentary sectional plan view leaves the said container. One of the objects of the improvements is to provide an apparatus of this type which is simple in construction and relianother modification,

able in operation, and with this object in view my. invention consists in constructing the said S g o h modification, tubular container in the form of a centrifugal pump adapted to draw the coagulating liquid through the said container, the said container nozzle. and

being immersed with its open bottom and into a I suitable coagulating liquid. Another object of n the example shown in Fig. 1 the spi ni apparatus comprises a vertically mounted rotary pipe I carrying a spinning nozzle 2 at its top and passed through the bottom of a receptacle 3 containing a suitable coagulating bath, the said pipe container, and with this object in view my inbeing a pted to e r p y rotated- T0 t P vention consists in constructing the container at its top end so that the said gas or air is delivered together with the coagulating liquid 1 For the purpose of explaining the invention several examples embodying the same have been clined delivery Openings 011 the P 4 a cup shown in. the accompanying drawings in which the same reference characters have been used in all the views to indicate corresponding parts.

In said drawings:

the improvements is to provide an apparatus in which air or gas which may get into or developed within the coagulating liquid flowing through the said container is removed at the top end of the ning apparatus in which the nozzle is located at the bottom of the rotary container, and the spinning liquid or viscose passes through the said container in upward direction,

a modification in which the nozzle is located near the top part of the container, the spinning liquid or viscose and the filament being formed moving through the said container in downward direction,

Fig. 3 is a sectional plan view taken .on the line 3-4 oi. Fig. 2,

Fig. 4 is a sectional elevation viewed from the t right in Fig. 2,

Figs. 5 and 6 are similar elevations showing positions,

Fig. 7 is a fragmentary sectional elevation showing a modification.

nts-inap- Fig. 8 is a sectional plan view taken on the Fig. 9 is a detail sectional elevation taken on Fig. 11 is a sectional plan view takenon the taken on the line l2l2 of Fig. 10.

v Fig. 13 is a detail sectional elevation showing Fig. 14 is a fragmentary sectional elevation Figs. 15, '16 and 17 are detail sectional elevations showing other modifications of the spinning Figs. 18 and 19 show another modification,

I. a pipe 4 of larger diameter is fixed which is immersed with its open bottom end into the "coagulating bath contained within the receptacle 3, and which is formed at its top end with in- B is removably mounted, and to the said cup a tubular container I is fixed. The cup 6 encloses the nozzle. 2. At its top end the container 1 flares outwardly at 8, and it is closed by a conical F 1 is a muonal elevation showing. a spin- 35 lid 9 formed at its center with a delivery opening for the thread l0 being formed. Around the outer upper margin of the flaring part 8 of the container there are delivery openings. II for the 4 coagulating bath, The diameter of the central opening made in the lid 9 is not larger than is Fig. 2 is a similar sectional elevation showing necessary for passing the filament m and a part of the coagulating bath therethrough. Itwill be seen that the pipe I, the cup 6, the container 1, and the lid 8 together constitute a rotary container, arranged in vertical position, whose otherwise continuous walls have a lowerintake adjacent the axis of rotation, and an upper delivery more remote from the axis of rotation than the The apparatus is operated as follows:

When the apparatus is arranged and is in the t parts of the spinning apparatus in different condition shown in Fig. 1, the lower end of the pipe 4 extending beneath the surface of a bath 3 of coagulating liquid, and'with the understanding that the entire container, including the parts 4, 5, fl, 8, and 9, is filled with liquid, ,the rapid rotation of this container will cause coagulating liquid to be drawn upwardly from the receptacle 3 and. to be ejected. through the openings I I. The rotating container thus acts as a centrifugal pump. Within the pipe 4 rotary movement is imparted to the coagulating liquid, so that the Any air or gas which might be developed within the container 1 is carried upwardly with the coagulating liquid and delivered therewith through the openings II, such gas delivery being assisted by the conical shape of the lid 9.

In Fig. 2 I have shown a modification in which the nozzle I3 is located near the top end of the rotary container I6 for the coagulating bath.

As shown, the spinning apparatus comprises a pipe I4 for the supply of the spinning liquid or viscose, a spinning head I5 carrying the nozzle I3 and fixed to the pipe M, a container I6 in the form of afunnel immersed with its bottom end into a suitable coagulating bath, a three-phase motor IT for imparting rotary movement to the spinning head, and a frame I8, I9 carrying the spinning apparatus and mounted for being vertically shifted between rails and 2|. The frame I8, I9 is suspended by means of a rope or chain 24. Thus the spinning apparatus is adapted to be moved upwardly and downwardly between the rails 20, 2| for more or less'immersing the container I6 to desired depth in the coagulating bath. The head I5 is provided peripherally with bores 26 that in the assembly constitute the delivery of the centrifugal pump whose barrel is the container I6 operating in like manner as the container of Fig. 1 already described.

In the normal operation of the apparatus the I6. In the example shown in the figures the said ejectors are located within the same. plane as passages 25 that act as a centrifugal pump. But the construction may also be such that the electors are located within a plane different from that of the passages 26. The ejectors are operated by the coagulating bath which is delivered through the nozzles 33, 34 by centrifugal action.

For starting the spinning operation the apparatus is lowered so far that the head I5, is immersed with the passages 25 in the coagulating liquid contained within the receptacle 3|, so that the container IS, the head I5 and also the receptacle 29 are nearly filled with coagulating bath (in Fig. 2 the level of the surface of the bath when the apparatus has been so lowered is indicated by the dotted line c, c). For the normal spinning operation the nozzle and the container I6 must be rotated from 5000 to 8000 revolutions per minute. But for starting spinning (the apparatus being in the lowered and submerged position described) this velocity is toohigh, and therefore means must be provided for rotating the spinning apparatus at comparatively low velocity when the operation is started. For this purpose at the beginning of the spinning operation threephase current of lower frequency and lower voltage may be imparted to the motor II, so that its number of revolutions is only a few hundreds per minute, the said number of revolutions being only so large that as the apparatus is raised and the passages 25 emerge from the bath the apparatus will act as a centrifugal pump for drawing the coagulating liquid through the container I5. After the flow of the coagulating liquid has thus been started the spinning apparatus is continuously moved upwardly until only the bottom end of the container I6 is immersed into the coagulating bath. Now the level of the coagulating bath is such as has been indicated by the full line b--b. Meanwhile three-phase current of the normal frequency is supplied to the motor I1, so

that the number of revolutions of the device rises container I6 is immersed into the coagulating bath with its bottom end only, and the coagulating bath is drawn upwardly by means of bores 26 provided at the top end of the container and acting as a. centrifugal pump. A jacket 2! disposed around the container IG and immersed into the coagulating bath is'provided with ribs 28 preventing the transmission of the rotary movement of the container IE to the coagulating bath. These ribs 28 are in the ensuing claims characterized braking members.

The coagulating liquid ejected from the centrifugal pump 26 is collected'within a receptacle 29 from which it is delivered through a gutter 30 to a receptacle in which it is regenerated before it is returned to the receptacle 3| containing the coagulating bath.

In the operation of the apparatus air may get into the cointainer, or gas may be developed by the action of the coagulating liquid on the viscose, and means are provided for removing such air and gas from the top part of the container. These means are shown in detail in Figs. '7, 8 and 9. Below the top end of the container I6 oneor more ejectors 32 are fitted in the wall of the said container, the said electors consisting of nozzles as'far as is necessary for a normalspinning operation.

In a modification the number of revolutions of the motor is reduced by providing the stator with two windings for different numbers of revolution.

The thread guide consists of two pins 38 and 39 on which the filament delivered from the container I6 is guided before it is wound on a roller 40 transmitting the same to a collecting device;

The said pins are mounted on an angular rod 4| the top part of which is disposed at an obtuse angle to the main part thereof. The said rod is guided in a vertical guide way provided on the frame I8, I9, and the said guide way is engaged either by the upper straight portion 4I0 of the rod, or by the lower straight portion, angularly disposed with respect to the portion 0, and to which the numeral ll is immediately applied, the said rod being setin its positions from its top end and from above the coagulating bath.

The spinning operation -is started as follows: I From the spinning apparatus the funnel shaped container I6 is removed, and the apparatus is lowered by means of the rope 24 so far that the nozzle is just immersed into the coagulating bath. The spinning liquid or viscose is supplied to the nozzle, and the filament being formed is drawn through the funnel shaped container I6 by means of a wire or hook and thereafter the said container is fixed to the head I5 by means of a nut 42. The filament is now placed on the roller 40,

passages 69 and ejector nozzles 66, 6|. fore by centrifugal action the coagulating liquid and-the spinning apparatus is further lowered until the spinning head and particularly the passages 26 forming the centrifugal pump are completely immersed, and the air is expelled from the container 16 (Fig.6). The rod 6| now is in the position A, shown in Fig. 6 in dashes and dots, in which position the pins of the thread guide are located slightly below the surface a-a of the spinning bath. The bottom part of the rod is temporarily retained in such position within the guide way by means of a screw nut (not shown). The said rod is then lowered until its upper angularly disposed portion 6" engages a the apparatus is raised until the bores 26 emerge from the surface of the bath, so that the centrifugal pump begins to draw the coagulating liquid upwardly and through the container l6. The spinning apparatus is then lifted so far that only the bottom end of the container is immersed into the coagulating bath, as is shown in Fig. 2, and the level of the bath relatively to the container is at b-b. Finally the length of the course of the filament within the coagulating bath 6i may be increased 'by moving the rod 64 from the Meanposition C'into the position D (Fig. while the speed-of rotation has been increased to the high velocity needed for twisting. The coagulating liquid is ejected. from the spinning head l5 through the holes 26 and into the receptacle 29 (Fig. 2), and it is removed from the said receptacle through the gutter 36. The object of the Jacket 21 is to confine the vapor of coagulating bath produced by the rotary movement of Next, the rod 6| is turned counteris drawn through the container 62. Air or gas bubbles which might rise within the container cannot be collected on the nozzle by reason of, the tapering shape of the said annular nozzle. and they rise either outwardly along the outer tapering wall of the cap screw 66, or, along the inner wall of the nozzle. formed by the conical bottom end of an axial bore 66 of the screw 66.

Through the said bore the air or gas gets through a chamber 66 and inclined and outwardly directed passages 65 and 66 to the top part 61 of the cup 6|, from whence they are'drawn oil by the electors 60, 6|.

The sectional view of Fig. 11 shows the vertical bores 66 and the inclined passages 66 and 66.

The sectional view shown in Fig. 12 shows-pas? sages 59 in addition to the ejectors 66, 6| the coagulating liquid being delivered through the said passages by centrifugal action. These passages may be dispensed with in which case the coagulating liquid is delivered exclusively through the electors. I

The velocity of the flow of the coagulating liquid in the bores 63, 65 and 66 and the annular top part of the container 52 above the nozzle is determined by the dimensions of the cross-sections respectively of the axial bore 63 and the passage between the head 66 and the adiacent wall of the container 52. Thereby the fiow within the axial bore 63 is made such that the air bubbles are safely removed without interfering with the formation of the filament from the viscose delivered through the bores of the nozzle;

In the modification shown in Fig. 13 the bores of the nozzle are inclined inwardly and downwardly, in accordance with the tendencyof the filaments, the specific gravity of which is smaller than that of thecoagulating bath, to direct themselves inwardly by centrifugal action.

Any gas or air which may rise within the container I6 is removed by the ejectors 66, 66.

By means of the construction shown in Fig. 7 air and gas are effectively removed from the container l6 by ejector action. Therefore the bores 26 forming the centrifugal pump are always completely filled with .coagulating liquid, and

. therefore their eiilciency is not impaired by air carried along by the coagulating liquid.

In Figs. 10 to 1'! I have shown further modifications in which the air and gas are removed in a reliable way. In these modifications bevelled guide faces for the said" gas and air or bubbles of gas or air areprovided.

In the construction shown in Fig. 10 the spinand 56 being provided for affording a tight joint.

Near its top part the cup 6| is provided with In the modification shown in Fig. 14 the nozzle 16 is mounted on a head 69. The nozzle is formed with a downwardly directed conicalextension II in which the bores of the nozzle are made. The air 'or gas bubbles which rise within the container collect near the axis of the device, because their specific gravity is smaller than that of the coagulating bath. But they cannot stick to the conicalnozzle 'II and they flow upwardly along the said conical nozzle and the conical outer wall of the nut 66. .They are collectedat the top part of the cup 6| at 61 and are removed by electors 66, 6|.

In Fig. .14 the level of the coagulating liquid ofthe bath is shown to stand higher than. the discharge orifices 66, 6I. From what has gone before it will be understood that this position of the apparatus in the bath is the initial position, when operation is beginning.

. In the modification shown in Fig. 15 a nomle of normal construction is used which has a conical body I2 axially secured thereto, for example by means'of a screw, the said conical body being made for example from artificifl, resin.

In Fig. 16 anannuiar nozzle 16 is provided which has a conical body "fixed thereto by means of a cylindrical stud I5 fitted in the central part of the nozzle.

In themodiflcation shown in Fig. 17 a conical I body I1 is fitted axially within an annular nozzle I6, and thesaid nozzle is formed with an axial bore I6 communicating at its top end with the container for the coagulating liquid through inclined passages 66.

There- By means of the conical bodies fixed to the bottom parts of the nozzles thefilaments are separated from each other so that they do not stick to one another.

Figs. 18 and 19 show a modification of the manner of suspending the spinning apparatus. The spinning apparatus is mounted on a frame composed of a pair of rails 92 having pins 8| fixed thereto, by means of which they are guided in slots 82 made in brackets 83. The rails are suspended by means of a rope 84 from a pulley 85, so that the whole apparatus may be lowered and lifted, as has been described above. The thread guides 86 are fixed to the rails 92.

For starting the spinning operation, the whole apparatus is immersed-with the tubular container 81 into the coagulating bath 88, and spinning is started with low velocity of the container 81 and the nozzle mounted therein. For pulling the filament being formed from the container 81, the whole apparatus is turned into the position shown in Fig. 18 in dotted lines, so that the bottom end of the container 81 is near the surface of the bath. Thus the filament can be readily pulled from the container and passed over rollers 89 and 90 on a bobbin 9|. Now the apparatus is returned into vertical position and lifted so far that only the bottom end of the con- I tainer 81 is immersed into the bath.

I claim:

1. An apparatus for spinning rayon, compressing a vertically mounted rotary pipe, a spinning nozzle borne by said pipe and rotatable therewith,-means for drawing filament asjii; is developed from said nozzle and in the line of the axis of rotation, and means for maintaining the spinning nozzle and the newly developed filament immersed in a correspondingly rotating bath of coagulating liquid, such means consisting of a receptacle for coagulating liquid and a tubular container arranged coaxially with said pipe and integrated with the pipe and rotating therewith, said container rising from beneath the surface of a body of liquid within said receptacle and enveloping the filament developed from the said spinning nozzle, and forming an annular chamber surrounding the nozzle, the said container at its lower end and beneath the surface of the liquid in the receptacle being open, and at its upper end being provided with a delivery orifice spaced from the vertical axis of the container at a distance greater than the radius of the open lower end of the container, the container being substantially closed at its upper end.

2. An' apparatus for spinning rayon comprising a vertically mounted rotary pipe, a spinning nozzle borne by said pipe and rotatable therewith, means for drawing filament as it is developed from said nozzle and in the'line of the axis of the surface of a body of liquid within said receptacle and enveloping the filament developed from the said spinning nozzle, and forming around the nozzle an' annular chamber, the said container at its lower end and beneath the sur-.

face of the liquid inrthe receptacle being open, and at its upper end being provided with a delivery orifice spaced from the vertical axis of the container at a distance greater than the radius of the open end of the container, and. a downwardly tapering conicailid formed at its center with a delivery opening, substantially closing the said container above.

3. An apparatus for spinning rayon comprising a vertically mounted rotary pipe, a spinning nozzle borne by said pipe and rotatable therewith, means for drawing filament as it is developed from said nozzle and in the line of the axis of rotation, and means for maintaining the nozzle and the newly developed filament immersed in a correspondingly rotating bath of.

coagulating liquid, such means consisting of a. receptacle for coagulating liquid and a tubular container arranged coaxially with said pipe and integrally united with the said pipe and rotating therewith, the said container rising from beneath the surface of a body of liquid within said receptacle and enveloping the filament developed from the said spinning nozzle, and forming an annular chamber around .the nozzle, the said container at its lower end and beneath the surface of the liquid in the receptacle being open, and at its'upper end being provided with a delivery orifice spaced from the vertical axis of the container at a distance greater than the radius of the open lower end of the container,

the container being substantially closed at its upper end, and a gas ejector arranged in said opening.

4. An apparatus for spinning rayon comprising a vertically mounted rotary pipe, a. spinning nozzle borne by said pipe and rotatable therewith, means for drawing filament as it is developed from said nozzle and in the line of the axis of rotation, and means for maintaining the nozzle and the newly developed filament immersed in a correspondingly rotating bath of coagulating liquid, such means consisting of a receptacle for coagulating liquid and a tubular container arranged coaxially with said. pipe integrated with the pipe and rotating therewith, said container rising from beneath the surface of a body of liquid within said receptacle and enveloping the filament developed from the said spinning nozzle, and forming an annular chamber around the nozzle, the said container at its lower end and beneath the surface of the liquid in the receptacle being open, and at its upper end being provided with a delivery orifice spaced from the vertical axis of the container at a distance greater than the radius of the open lower end of the container, the container being substantially closed at its upper end, a gas ejector arranged in said opening and a gas passageway formed in the wall of the container and leading from the chamber within the container and from the highest portion thereof to the said gas ejector.

5. An apparatus-for spinning rayon comprising a vertically mounted rotary pipe adapted to receive spinning liquid from above, a spinning nozzle provided with bores borne by said pipe at its lower end and rotatable therewith, the nether surface of the nozzle adjacent the opening of such bores being oblique in extent, means for drawing filament as it is developed from said nozzle downward and in the line of the axis of rotation, and means for maintaining the "nozzle and the newly developed filament immersed in a correspondingly rotating bath of coagulating liquid, such means consisting of a receptacle for coagulating liquid and a tubular container arranged coaxially with said pipe integrated with the pipe and rotating therewith, the said container rising from beneath the sunface of a body of liquid within said receptacle and enveloping the filament developed from the said spinning nozzle and forming an annular chamber around the nozzle, the said container at its lower end and beneath the surface of the liquid in the receptacle being open, and at its upperend and at a level higher than the opening of the bores in the spinning nozzle being penetrated with a delivery orifice, such ,a delivery orifice being spaced from the vertical axis of the container at a distance greater than the radius of the open lower end of the container, the container being substantially, closed at its upper end.

, 6. An apparatus for spinning rayon comprising a vertically mounted rotary pipe adapted to receive spinning liquid from above, a spinning head borne by the said pipe at its lower end and gotatable therewith, the head being provided with downwardly directed bores grouped in annular formation, and the head being further provided with'an axial passageway that opens from below with conical walls converging upwardly and that "leads upward and delivers laterally through. the

body of the said spinning nozzle, means for drawing filament as it is developed from said head'downward and in the line of the axis of rotation, and means for maintaining the spin-- ning head and the newly developed filament immersed in a correspondingly rotating bath of coagulating liquid, such means consisting of a receptacle for coagulating liquid, and a rotary container arranged coaxially with said pipe united to and rotating in unison with the pipe,

the said container rising from beneath the surface of a body of liquid within said receptacle and enveloping the filament developed from the said spinning. nozzle, and forming around the head an annular chamber, the said container at its lower end and beneath the surface of the liquid in the said receptacle being open, and at its upper end and at a level higher than the opening of the bores in the head being penetrated with a delivery orifice, such delivery orifice being spaced from the vertical axis of the container at a distance greater than the radius of the open lower end of the container, the container being substantially closed at its upper end.

' vided with downwardlydirected bores, and the nozzle being tapered in its central portion downwardly, means for drawing filament as it is de-' ,veloped from said nozzle downwardly and in the line of the axis of rotation, and means for maintaining the nozzle and the newly developed filament immersed in a correspondingly rotating bath of coagulating liquid, such means consisting of a receptacle for coagulating liquid and a tubular contained arranged coaxially with said pipe united to the said pipe and rotating therewith, the said container rising from beneath the surface of a body of liquid within the said receptmle and enveloping the filament developed from th said spinning nozzle, and forming an annular chamber around .the-nozzle, the said container at its lower end and beneath the surface of the liquid in the receptacle being open, and at its upper end and at a level higher than the opening tainer at a distance greater than the radius of the open lower end of the container, the container being substantially closed at its upper end.

8. An apparatus for spinning rayon comprising a vertically mounted rotary pipe adapted to receive spinning liquid from above, a spinning, nozzle borne by the said pipe at its'lower end and rotatable therewith, the nozzle being provided with downwardly directed bores grouped in annular formation, and a downwardly tapered block fixed to the nozzle within the annulus of res, means for drawing filament as it is developed from said nozzle downwardly and in the line of the axis of rotation, and means for maintaining the nozzle and the newly developed filament immersed in a correspondingly rotating bath of coagulating liquid, such means consisting of a receptacle for coagulating liquid and a. tubular container arranged 'coaxially with said pipe and united integrally with the pipe and rotating} therewith, the said container rising from beneath the surface of a body of liquid within the said receptacle and enveloping the filament developed from the said spinning nozzle, and forming around the nozzle an annular chamber, the said container at its lower end and beneath the surface of the liquid in the receptacle being open, and at its upper end and at a level higher than the openings of the bores in the spinning nozzle being penetrated with a deliveryorifice, such delivery orifice being spaced from the vertical axis of the container at 9, distance greater than the radius of the open lower end of the container, the container being substantially closed at its upper end.

9. An apparatus for spinning rayon comprising a vertically mounted rotary pipe adapted to receive spinning liquid from above, a spinmng head borne by the said pipe at its lower end and rotatable therewith, the head being provided with downwardly directed bores grouped in annular formation, and 'a block fixed centrally in the head,- said block being formed with a tapering lower end, projecting downwardly from the head within the circle of its bores-and having itself of the bores in the spinning nozzle being pene- 7 an axial bore, a passageway formed in the body of the head outwardly, through which the bore in the said block has communication, means for drawing filament as it is developed from said head downwardly and in the line of the axis of rotation, and means for maintaining the nozzle and the newly developed filamentimmersed in a correspondingly rotating bath of coagulating liquid, such means consisting of a receptacle for nular chamber; the said container at its lower.

end and beneath the surface of the liquid within the receptacle being open, and at its upper end and at a level higher than the opening of the bores in the spinning head being penetrated with a delivery orifice, such delivery,- orifice being spaced from the vertical axisof the container at a distance greater than the radius of the open lower end of the container, the container being substantially closed at its upper end.

10. An apparatus for spinning rayon comprising a vertically mounted rotary pipe, adapted to receive spinning liquid from above, a spinning nozzle borne by said pipe at its lower end and rotatable therewith, means for drawing filament as it is developed from said nozzle downward and in the line of the axis of rotation, means for maintaining the spinning nozzle and the newly developed filament immersed in a correspondingly' rotating bath of coagulating liquid, such means consisting of a receptacle for coagulating liquid and a tubular container arranged coaxially with said pipe and united with the said pipe and rotatable therewith, said container adapted to occupy a position in which it rises from beneath the surface of a body of liquid within the receptacle, enveloping the filament developed from the said spinning nozzle and forming an annular chamber around the spinning nozzle, the said container at its lower end and beneath the surface 01' the liquid in the receptacle being open, and at its upper end being provided with a delivery orifice spaced from the vertical axis of the container at a distance greater than the radius of the open lower end of the container, the container being substantially closed at its upper end, means for raising and lowering the container relatively to the level of the liquid in the receptacle, and a thread guide movable with the container as it is raised and lowered.

11. In combination with a receptacle for coagulating liquid, apparatus for spinning rayon conconsisting of a tubular container arranged coaxially with said pipe, united with the pipe, and rotatable therewith, said container adapted to occupy a position in which it rises from beneath the surface of a body of liquid within said receptacle, enveloping the nozzle and forming an annular chamber around the nozzle, the said container at its lower end andbeneath the surface of the'liquld in the receptacle being open, and at its upper end being provided with a delivery orifice -spaced from the vertical axis of the container at a distance greater than the radius of the open lower end of the container, the container being substantially closed at its upper end, a thread guide carried on a rod including two portions angularly disposed relatively to each other, and a guide-way borne by the spinning apparatus with which the said rod in either of its por- .tions may be engaged.

12. An apparatus for spinning rayon, comprising a vertically mounted rotary pipe, a spinning nozzle borne by said pipe and rotatable therewith, means for drawing filament as it is developed from said nozzle and in the line of the axis of rotation, means for maintaining the spinning nozzle and the newly developed filament immersed in a correspondingly rotating bath of coagulating liquid, such means consisting of a receptacle for the coagulating liquid and a tubular container arranged co-axially with said pipe and integrated with the pipe and rotating therewith, said container rising from beneath the surface oi! a body of liquid within said receptacle and enveloping the said spinning nozzle and filament developed therefrom, and forming an annular chamber surrounding the nozzle, the said container at its lower end and beneath the surface of the liquid in the receptacle being open and at its upper end being provided with a delivery orifice spaced from the vertical axis of the container ata distance greater than the radius of the open lower end of the container,'the container being substantially closed at its upper end, and a jacket surrounding thev container and immersed in the coagulating bath, the jacket being provided with ribs that constitute braking members adapted to check induced rotation of the liquid in the receptacle.

WILHELM W'UPPERMANN.

Images