US2267287A - Selvage forming device for looms - Google Patents

Description

1941- AQMOESSINGER "2,267,287

SELVAGE FORMING DEVICE FOR LOOMS I F iled Aug. 8, 1940 s Sheets-Sheet 2 INVENTOR. I ALBERT MES-SINGER,

A RNEY projecting from trol valve.

Patented Dec. 23, 1941 umrw STATES SELVAGE FORMING nnvlon m Looms 7 7 AlbertMoessinger, wintertliurjs witzerland, as F;

signor'to Sulzer'lireres, Socit I terthur ,'Switzerlan d" H s I.

Application August a, 1940,=seriaii-i ;351,'s0 '3 If; g

In Switzerland Augustv 26, 1939 I.

1; Claims. (01. 139-127) The present invention relates to a method and means for forming a selvage on wovenfabric, more particularly for turning the thread ends the edge of the fabric into the shed. A

It is an object of the present invention taprovide a method and'xmeans for producing'the effect stated in the-paragraph next above'whereby the'turning over of the thread ends is :ac-

complishedby. means of suitably directed-cur- 'rents or jets of an operating fluid. The equipment for carrying out the-newprocess comprises accordingly devices-with the help of which the bending-"over of the thread ends is effected through forces which are-generated by currents: or'jets issuing from pipes disposed'near-theedge of the cloth.

The bending over of the threadeends may be efiected, for instance, by'a current of 3.1!,8. current of gas or a current of steam. If the bend-'.

ing over of the thread ends is effected byrcompressed air, by air suction'or by suction andzcompressed air combined, the direction of at least one of the jets of air may be adjustable. The

thread ends may also bebent overby several streams of air acting in different directions, at

least one of which is controlled. I

For instance, one air current may bend the thread end over in the weaving plane approximately in the direction of the warp threads and another stream, acting intermittently, may bend the thread over intothe shed that is formed.

After the end of the thread has been turned into the shed, a further stream, acting intermittently in the directionof the apex of the shed, presses the thread end closely against the cloth. The

thread end may, however, also be held in the plane of the cloth approximatelyin the direction of the warp threads by means, of a suction nozzle. 7 Y

The nozzles used for producing theair-curren'tsmay be supported, at least p'artly,'on a stationary part of the machine.

arranged between the blow-in' nozzle and a con- A liquid may be sprayed together An'air container may be with the airxcurrent on the projecting thread end or on theoutermost warp threads whereby the liquid is carried, by the air current. Aregulating valve or an orifice-diaphragm may be arranged in the compressed air conduit.

The air, gas or steam required for producing the current or jets may be supplied by a piston which is driven by the'loom. The air flow may be controlled by means of a valve or valves which are operatively connected with the piston or with ingthe drawings which. by wa y 0f illustration, show vvwhat I now-'cons'ider to be preferred [embodiments ,of my invention;

. -Fig.;, 1 is,anaxonometric;representationofan :mechanism according to -the: invention having .two compressed-air nozzles.

Fig. 2 is a top .view, o f. 'a modified arrangement according to] the invention, having .onl'y one nozzle.

Fig. 3 is a nozzles .blow jets ofv air in fdifferent'direction's.

Fig, 41, diagrammatically illustrates ;a means according to the invention forguiding the thread Fig; 5 isa iront view of the means ,-sh own-';in

Fig. 6 is ;aside view of the means shownf-in IFigv "1 Fig.3.? diagrammatically; shows a device-{in which the freely projecting thread end is held warp. threads by'rneans' I in the direction of the ofa suction nozzle, W

'Fig. 8 diagrammatically illustrates a modification of an arrangement; according-to themespose of the edge-'formenaccordi-ng to the inven 7 tionis'tobend thread end 2 overcinto the next v ends with liquid.

Vent invention inwhichthe thread is held in the direction of the warpthreads by means of; a.

suction nozzle.

1 Fig. 9 shows anarrangement according tofthc inventionhaving a container between thecontrol valve and the nozzle. I

Fig. 10 illustrates an injection device according to the-invention for i-rnoistening the thread Fig. ll' illustrates an cording to the invention. Like parts are designated by last inserted weft thread 3.';- ;End 2 projects 'at the side from the finished material 'I The purformed shed. ,From pipe'l provided at? its end diagrammatic top view of another Umodific ation of the inventi0n.1in which three arrangement for driving the pump for producingtheair currents-or jets. Fig. 12 illustrates a modified pump-drive paclike numerals {in l I all figures of the drawings 5 Y I with a nozzle I, an arm I" is blown for this Purpose in the plane of the cloth I in a direc- 'tion opposite to the direction of movement of the warp threads. By means of this jet of air the thread end 2 is moved in, the direction of the projection of the warp threads. Before the shed is closed,. astream of air, which'moves approximately parallel to the" weftgthr'eads, emerges from pipe 6 through a nozzle I, whereby the air stream is regulated by means of a valve I2 controlled by the agency of a cam 8 operating on' a roller 9 at the end of lever ll; lever H is pivoted at I and has an arm pperatively connected with the valve l2. The airstream emerging from nozzle 1 bends the thread end over and into the shed. One of the nozzles} or I may be made movable, so that the direction 'fof the jet v emerging therefrom can be adjusted. Both noz-' zles are preferably mounted to a stationary part of the loom. a 3

Fig; 2 shows an embodiment of the invention in which only one nozzle 4 is provided According tothe nature of I the edge of the fabric i'the thread end 2 canthereby be' blown in a certain direction, for instance, either into a cutting-off device or, as shown in Fig.'2,5to be bent over and "into the'neXt formed shed. After the pick ofthe weft thread l the warp threads i. (Fig; 1) form 'a newshed} During this-time the control valve 102 (Fig. 2) is'opened by mean's of a leverl03 provided with a roller I04 cooperating with a cam J05. The air that fiows'out of pipe "4': lays the thread 2' into the newly formed shed. Even 1 when the freely projecting'thread end 2" is not exactly in the direction of .the'nozzle outlet, it will be brought into the direction of the air jet "emerging therefrom by means of the suction action of the air stream and will be carried along with the stream; 1

Fig. 3 illustrates a device in which three-compressed air pipes I3; ll, l5 are provided; these pipes terminate into nozzles: arranged inthree different directions in the plane' of the fabric.

These pipes are fitted with controlled valves l6,

l1, l8 which are adjusted by means of diagram- I 'matically shown cams I9, 20, 2| rotating in the direction of the arrows u. At first the compressed air pipe l3 blowsajet' I 3' in the direction of the projection of the 'warp threads and in the plane of the fabric for bending the thread over, then the compressed-air pipe l4 blows a jet "approximately in the direction'of the 'weft threads and pipe l5 blows a jet in the direc tion of/or in back of the weft threads. By these streams of airthe thread end 2 is bent over into the shed, i. e. tucked in to form ahem. A

' hem may, of course, be formed orithc "ebric either on one side only or on both sides.

With the edge-forming device according to Fig.

' 3 it is possible'to press the bent-over thread end quite close-to the ap'ex'of the shed] It is advisable, especially in the case of very elastic yarn, as for instance wool, certain silks or rayon, not

to close at least one of the valves,for instance the valve i8, until the shed is closed, so that the thread end 2 cannot spring back out of the shed. v Y

A further modification of the edge-forming apparatus including a thread guide is represented in Figs. 4. 5 andfi. In the thread guide22 a pipe 4" is provided which causes: a'streamof air to flow at right angles to the weftlthread 3, so that the thread end 2 runs at first parallel to the warp threads l'.f

A .pipe'Bj then introduces a stream'of air into the thread guide in the diaaemav 5- rection of the weft thread I, thus turning the thread end 2' completely over. i. e., bending it into the shed. The guide 22 may also be of such a form as to create an ejector action, so that if the thread end is outside of the guide it will still be bent over into the shed because of the secondary air streams. which are caused by the main streamemerging from'thenozzle 6.

Primarily a current is produced through pipe 4,", into WhiChyfOl' instance, air is blown; after that, air emerges from pipe 6, whereby the thread end bent by the current emerging from pipe 4 I, is bent over still further andinto the shed.

'1 in Figs. Tandjli an edge-forming apparatus is illustrated inwhich the thread end 2 is held in the direction of the warp threads 25 by means of a suction stream.- After the thread end 2 is "let loose, i.- e. after the pick is completed, the

thread end 2 is drawn into the slotted suction nozzle 26 during its movement from the picking position 23 to the cloth I.- In order to obtain sufficient suction action at theend of the suction 'nozzle,.a guide plate-211s provided-therein. Finally, by'means of the compressed airoemerging 'from pipe 28, the thread end 2 is bentover -into the position.i2', i..e. into theshed.

Fig. 9 illustrates especial construction of a compressed air pipe. Betweenthe. nozzle and the control valve 3|. which isoperated by, means of a cam 32 cooperating with aroller 33 provided ontheivalve operating-lever. 34,=achamber 35 isprovidedwhich may .beof such capacity that a=desired amount of airflowsthrough the nozzle Sill-after closing of valve 3|. 2 A further'adjustable of air-may be connected with the loom drive either directly or by means of a clutch coupling. Fig. ll-shows a driving motor 40 having a shaft one end .of. which isconnected withthe loom coupling 4| and the other end of which is-connected with a comprssorflby means of, a coupling 43. The air pump thus may continue to be driven when the loom has been stopped.

Instead of air, steam may be used for. producing the necessarycurrents, and thesteam may then be obtained from a central plantor from a-small I electric steam generator built into each. loom. Exhaust gas from a heating plant or somerother kindjcT plant may also be vused for this purpose.

Fig, 12 shows an air pump which works synchronously with the-loom. In thecyllnder 50 is arranged a piston 5i having apiston rod 5|- the latter being operatively connected with I and driven by'shaft 60 of the loom. .Thepiston divides the cylinder into two chambers 52 and;53,' chamber 52 producing compressed air. whilst chamber 53 produces a suction effect. The compressed air produced in chamber 52 is ejected through-passage into pipe -55, leading for instance to a deliveryhozzle. .Furtherair may be supplied bythe piston 5i through the passage 58 into'th'e pipe :51 for supplying. air to further nozzles. Passages 54* and 56 are controlledby a sleeve member'59 adapted to move simultaneously withthe piston 5l.- If the plant requires suction air, as for instance in connection with the devices according to Figs. 7 and 8, chamber 53 is connected by means of pipe 58 with the suction devices.

While I believe the above described embodiments of my invention to be preferred embodi ments, I wish it to be understood that I do not desire to be limited to the exact details of design, method and construction shown and described, for obvious modifications will occur to a person skilled in the art.

I claim! 1. A device for bending projecting weft thread ends in looms for weaving into the shed, said device comprising a plurality of individual nozzle means disposed in different directions adjacent to said thread ends and ejectingstreams of operating fluid acting in diiferent directions on said thread ends, the combined action of said streams bending said thread ends into the desiredposition, fluid flow control means individually connected with said nozzle means, and periodically acting operating means operatively connected with and operating said fluid flow control means and being operatively connected with and actuated by the loom.

2. In looms for weaving, a device for bending projecting weft thread ends into the shed, said device comprising a plurality of individual nozzle means disposed in different directions in the center plane of the shed adjacent to said thread ends and ejecting streams of operating fluid in different directions in the center plane of the shed and acting on the thread ends, the combined action of said streams bending the thread means disposed in difierent directions in the cen- 4 ter plane of the shed adjacent to said thread ends and ejecting streams of operating fluid in different directions in the center plane of the shed and acting on the thread ends, the combined action of said streams bending the thread ends into the desired position. fluid flow control means individually connected with said nozzle means, and

, consecutively acting operating means operatively connected with and consecutively-operating said fluid flow control means and being operatively connected with and actuated by the loom.

4. In looms for weaving, a device for bending projecting weft thread ends into the shed, said device comprising a plurality of individual nozzle means disposed in different directions in'the center plane of the shed adjacent to said thread ends and ejecting streams of operating fluid in different directions in the center plane of the shed, the direction of one of said nozzles and fluid therefrom being parallel to the projection of the warp threads in the central plane of the shed.

5. In looms for weaving, a device for bending projecting weft thread ends into the shed, said device comprising a plurality of individual nozzle means disposed in different directions in the center plane of the shed adjacent to said thread ends and ejecting streams of operating fluid in different directions in the center plane of the shed, the direction of one of said nozzles and streams being parallel to the projection of the warp threads in the central plane of the shed, fluid control means connectedwith another of said nozzle means, and periodically acting operating means operatively connected with and operating said fluid flow control means and being operatively connected with and actuated by the loom.

6. In looms for weaving, a device for bendingprojecting weft thread ends into the shed, said device comprising a plurality of individual nozzle means disposed adjacent to said thread ends and said nozzles and guiding the thread ends in the center plane of the shed.

ALBERT MOESSINGER).

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