US1684364A - Method for weaving textile fabrics - Google Patents

Description

Sept. 1 1, 1928. 1,684,364

- G. J. SECKEL METHOD FOR WE AVING TEXTILE FRABRICS Filed July 2, 1925 Patented Sept. 11,

UNITED STATES GERRIT JAN SECKEL, OF ENSCHE-Dl'tl, NETHERLANDS.

METHOD FOR WEAVING- TEX TILE FABRICS.

Application filed July 2, 1925, Serial No.- 41,184, and in the Netherlands May 19, 1925. I

The invention relates to an improved method for weaving textile fabrics.

. In threading the warp threads in the reed of a loom it has hitherto been preferred to insert between each-two wires of the reed a minimum number of warp threads or in other words to provide for a maximum number of wires per unit of length, 1n order to ensure that in the fabric the warp threads will lie at equal distances'apart, i. e. that the. tracks left by the wires of the reed appear in the fabric to the minimum extent.

This practice however gives rise to several important drawbacks of which one of the greatest is the danger of breaking the warp threads when knots or slubs occur therein, which in that case cannot pass through the narrow slits of the reed. The large number of wires in the reed moreover increases the total friction between the warp threads and the reed, which in turn increases the breakages of the threads.

The invention has for its object to produce an absolutely even fabric while using wide slits between the wires of the reed. and

therefore few wires per unit of length avoiding in this way the inconveniences mentioned above.

According to this invention such object is attained by so controlling the tension in all or some of the Warp threads lying be tween each pair of wires at the instant on which the weft is beaten up, that the tension in the warp threads immediately adjacent the said wires is less than that in the threads lying between them..

According to one embodiment of my present invention, the above object may be realized by actuating "the heddles or harnesses 40 of the loom, carrying the warp threads,

which within each slit of the reed lie immediately adjacent the wires somewhat later than the harnesses carrying the interjacent warp threads. The latter at the instant of beating up the weft will therefore have a greater tension than the first mentioned warp threads which therefore are forced outwards so. that in the fabric they will come in place immediately in front of the wires of the reed' and by doing so will avoid the track which otherwise would be left by the wire.

This difference in tension which is caused by the different times of operating the harnesses of the loom is not always sufficient to attain the object in view. Therefore in order I completely to avoid the'leaving of the tracks ofthe wires in the fabric, according to my present invention the warp threads which within each slit of the reed lie immediately ad acent the wires substantially atthe instant at which the weft is beaten up, are

slackened and thereafter are again tensioned, so that the shed at the moment at which the shuttle is passed therethrough, Wlll always be flat and tensioned. The method of slackening the Warp threads adacent the wires of the reed, at the moment of beating up the weft in some cases-may also be applled independently of the method of operating the harnesses at a different moment.

The invention will be further described with reference to the accompanying drawmg in which by way of example an embodiment of a loom for weaving plain tafi'eta, is lllustrated. l

Fig. 1 shows a diagrammatic side elevatron of those parts of the loom to which the invention relates.

Fig. 2 is a fragmentary plan view of the shedding cams.

Fig. 3 is a fragmentary top plan View showing the relative position of the threads at the moment when the weft is beaten 9p,

and

Fig. 4 is a similar iew showing the threads after the reed has moved back.

In these figures 1 designates the harnesses of the loom intended for carrying the warp threads which in each slit of the reed lie immediately adjacent the wires, the harnesses For operating the separate sets of harnesses, the cam shaft carries two sets of shedding cams 6, 7 and 8, 9, which may be formed in pairs'or all may be made integral.

'In the drawing the cams of one set are shown on a larger scale than those of the other set. This however is only done for the sake of clearness' as in reality the cams preferably are of equal dimensions. With the different cams co-oper'ate treadles 10, 11 and 12, 13 respectively. The cams are arranged in pairs in such manner that the harnesses 1 are no erated later than the caused b \brealiing o I maybe knots and slabs may wards, causing the warp harnesses 2. dlhelhnes a and 6 indicate the different closed-shed positions .of. the two sets of shedding-cams. v d

The loom is further provided with a sta-, tionar sheddin beam 14 carrying the wa threa s of the harnesses 2 and a movab e shedding beam 15 for the warp threads which are carried by the harnesses 1 and therefore ineach slit of the reed lie immediatel a acent the wires. The movable she di-ng beam-15-is mounted on a rocking shaft 16 which may be rocked by means of a lever 17. and a cam '18. Instead of the fixed shedding beam a movable shedding beam acting in the ordinary way may be used. 7

If lease rods, are necessary such rods should be disposed separately in the two groups of threads as shown in Figure 1.

The modus operandi of the apparatus shown is as follows:

Due to the difference in the angular position of the two pairs of cams the harnesses 2 'after the insertion of a weft thread are 25" earlier operated than the harnesses 1, so that at the moment of beating up the weft, the interjacent warp threads 19 are tensioned more than the threads 20 immediately adjacent' the wires, causing the latter to be forced outwards vand to come'in the fabric immediately in front of the wires. This effect is increased by the fact that the eccentric 18- is so adjusted and is driven in such a way that at the moment of beating up the we the movable shedding beam15 is moved forthreads 20 adjacent'the wires to be slackened. The positions occupied-by the adjacentthreads 2 0 and interjacent t reads 19 whenthe weft is beaten up, and during the return of the shuttle, are shown in FigsLB and 4, respectively. I Immediately after the beating up the bait 16 is turned in the opposlte direction so that the correspondingl wa threads are a ain tensioned, so that t e she will be comp etely fiat and tightened at the moment at which the shuttle is assed therethrou h, avoiding much bre age of the threads and therefore also reducingthe danger of the shuttle being thrown out. In most cases this .throwin of the-:shuttle is e during t e rfeturn movemenhof't e lay as the loose ends 'of the threads prevent the adjacent ,warp threads from opening. As by applying the invention the s itsgo I the reed twice as wide as usual, such accidents are almost completely avoided, since a readily pass betweenthe rods of. the reed.- The 'slackemng of the warp threads which are in direct contact threads harnesses car with the metal rods of the reed, at the moment of the beatin up of the weft reduces also the breakage 0 such threads.

What I claim is:

' 1. In the process of weaving textile fabrics which comprises assing more than two warp "threads throu' the same silt of the reed, the method 0 preventing reediness which consistsin controlling the ten- S1011 of the'warp threads-within each silt of the reed at the moment at which the weft thread is beaten u so that the threads immediately adjacent t e wires of the reeds are less tensioned than the interjacent threads.

2. A method as claimed in claim 1, in

which the harnesses of the loom carrying the warp threads whichin each silt of the reed he immediately adjacent the rods are operated later than'theharnesses carrying the interjacent warp threads.

3. A method as claimed in claim 1, wherein the first mentioned warp threads are 'slackened before and are again tensioned after the. moment of beating up the weft.

. 4. A loom of the .t e includin a reed providing slits throng which t e warp threads pass, characterized by the fact that in each slit warp threads lie adjacent the wires of the reed and other warp threads are interjacent thereto, and means is provided for exerting, atthe moment at which the weft thread is beaten up, a less tension on said adjacent threads than on said interjacent threads. 4

p 5. A 100m of the ty e including a reed providing slits throng [which the warp threads pass, harnesses for carrying the warp threads, and cams for operating said harnesses, characterized by the fact that in each slit warp threads lie adjacent the wires of the feed and other warp threads are interjacent thereto, and that the cams for operating said harnesses are so arranged that the harnessescarrying the adjacent threads areoperated later than the harnesses carrying'the interjace'nt threads, I

' 6. In a loom, a read having wires providing relatively wide slits for the reception of a plurality of warp threads, harnesses carrying the threads adjacent said wires, 'ng the interjacent threads a movable bac adjacent threads,

at ing said movable back bearer to slacken 11 the threads controlled thereby at the: mothe weft. Y

bearer for carrying the san a back bearer for carry ng the interjacent threads, and means for oper- Inn cenr rlqnm or poklmcrlon.

' Patent N f dianmdsehrember' 11'. 1928, w

4 .GERRIT JAhlseem.

= lta-iaheteby certified that errorappears in th p ki nted apecitieation arm; abovenninbered patent requiring correction as follows; Page 2, lines68fa'nd 71; claim {1, for the word "silt" read 'slit"'; and the said Letters Patent should be read'with these corrections therein that the. samemay coniorm to the record of the case in the Patent Office.

Signed and sealed this 9th day of October, A. D. 192 8.

. 1 4 c M lgm re, I (Seal) Acting Commipi'oner olflatenta- CERTIFICATE or CORRECTION. Patent No. 1,634,354. Granted Sept-ember 11, 1928; io

GERRIT JAN seeKEL;

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as followsz' 'Page 2, line 79 ,claim 2, for theword "siltl read "slit"; 'and that the said Letters Patent should be read with this correction therein thatthe same may conform tothe record of the case in the Patent Office. I a signed and sealed this 6th day; of November, A. D; 1928.

1 M. J. Moore, (Seal) Acting Commissioner of Patents.

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