US3457966A - Method and apparatus for forming tucked-in selvages on fabrics woven on looms having bobbinless shuttles - Google Patents

Method and apparatus for forming tucked-in selvages on fabrics woven on looms having bobbinless shuttles Download PDF

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Publication number
US3457966A
US3457966A US672829A US3457966DA US3457966A US 3457966 A US3457966 A US 3457966A US 672829 A US672829 A US 672829A US 3457966D A US3457966D A US 3457966DA US 3457966 A US3457966 A US 3457966A
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Prior art keywords
tucked
weft
thread
loom
fabric
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Expired - Lifetime
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US672829A
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English (en)
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Johann Cujai
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Sulzer AG
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Sulzer AG
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/40—Forming selvedges
    • D03D47/48—Forming selvedges by inserting cut end of weft in next shed, e.g. by tucking, by blowing

Definitions

  • the members are coupled either to the main loom shaft via reduction gearing, or to a heddle frame in the loom having a suitable rate of reciprocation.
  • the present invention relates to a method of and an apparatus for forming tucked-in selvages on fabrics woven on looms having shuttles without pirns, e.g. looms of the gripper shuttle-type, in which the ends of a weft thread, protruding beyond both edges of the fabric, are held in extended position until beating up of the weft is completed, and are then laid into the next shed and beaten up there together with the following weft thread.
  • Selvages having tucked-in weft ends made according to known methods contain twice as many weft threads and are therefore thicker than the ground of the fabric. This increased thickness is of no importance in the further processing of individual webs of cloth. The situation is different, however, when a relatively larg number such as a hundred or more webs of cloth are placed on one another for cutting. In that case the edges of such stacks of cloth are substantially higher, by reason of the thick ened tucked-in selvages of the individual webs of cloth, and the cloth in the higher layers no longer lies flat.
  • the present invention is directed to providing a method and an apparatus which make it possible, in weaving fabrics on looms having bobbinless shuttles or on looms weaving with a stationary weft supply, to form thinned tucked-in selvages without thereby slowing down the weaving operation or adversely affecting the appearance of the fabric.
  • some of the thread ends which are held fast in their extended position are deflected, so as to prevent engagement therewith of the tuck-in needle, the thread ends which are thus not tucked in being subsequently cut off.
  • the cutting off may take place immediately as the weft threads are woven into the fabric, or later on.
  • cut-off means may be provided on the loom itself, at both edges of the fabric, immediately following the temples.
  • the thread ends which are not tucked-in can, however, also be cut off later, when the fabric is further processed after weaving, on some processing machine which simultaneously performs cleaning or other operations.
  • the invention also provides apparatus for practicing the method of the invention.
  • That apparatus comprises at both edges of the cloth a finger member which reciprocates up and down in relation to the plane of the fabric at a location between the edge of the fabric and the thread clamp for the thread end, at a frequency proportional to the operating speed of the room.
  • each finger member is afiixed to an arm, the pivoting axis of which extends at a distance from and parallel to the axis of the temple at the edge of the fabric where that finger member is provided.
  • the pivoting axis of the arm is disposed beyond or downstream of the temple, when viewed in the direction of cloth movement, and the arm has between its finger member and its pivoting axis a bend which, in the operative position of the finger member, extends around the temple.
  • the finger member After deflection of a weft thread end, the finger member must be brought into a position which avoids interference with the reed when the latter moves to beating-up position. This may be achieved according to the inventlon by disposing the pivot of the arm on a carriage which is coupled to the reed to move in the same direction.
  • the pivoting drive of the arm can then be so constructed as to impart to the arm only the slight pivoting movement needed to deflect a weft thread end.
  • the pivot axis of the arm is stationary in the loom frame and the pivoting drive is so constructed that during beating up of the weft the finger member is always outside the working range of the reed.
  • the pivoting drive of the finger-carrying arm is, according to a further feature of the invention, preferably so constructed that the arm is connected by a pull-rod to a lever which has a cam follower thereon and which is held by a spring against a cam driven from the main shaft of the loom.
  • the cam is preferably not mounted directly on the main shaft but on a separate shaft which is driven from the main shaft through a gearing with a variable integral reduction ratio of at least 2: 1.
  • the variability of the reduction ratio makes it possible, in conjunction with a corresponding design of the cam, to form tuck-in selvages more or less thinned out as desired. For example, with a reduction ratio between the main shaft and the cam of 2:1 and when using a cam with a single lobe, a tuck-in selvage is formed in which only every second weft thread end is tucked-in.
  • a selvage produced on a loom having pirn-carrying shuttles (hereinafter an ordinary selvage) is compared on the one hand with a conventional tuck-in selvage and on the other hand with thinned tuck-in selvages according to the invention, the following observations may be made:
  • the theoretical thickness of an ordinary selvage com posed of 50% warp threads and 50% weft threads is assumed to be 100%.
  • the theoretical thickness of a conventional tuck-in selvage composed of 50% warp threads, 50% weft threads and an additional 50% of tucked-in weft thread ends is accordingly 150%.
  • the theoretical thickness of a doubly thinned selvage formed by the method of the invention and in which, of three consecutive weft thread ends only one is tucked in, so that the selvage comprises 50% warp threads, 50% weft threads and only 50/ 3% tucked-in weft thread ends, amounts to only 116%.
  • a theoretical thickening of the tucked in selvage of 25% or less compared with an ordinary selvage can, as is well-known, be compensated by a corresponding thinning of the warp threads in the selvage without adversely affecting the quality of the selvage.
  • the method according to the invention thus makes it possible 4 to form tucked-in selvages, the thickness of which differs either not at all or only in an insignificant degree from the thickness of an ordinary selvage.
  • FIGS. 1 to 3 illustrate the formation of a conventional tucked-in selvage in three successive steps
  • FIGS 4 to 6 show the formation of a tucked-in selvage according to the method of the invention, FIG. 5 being a cross-section along the line VV in FIG. 4;
  • FIG. 7 is a diagram illustrating one form of apparatus for practice of the method of the invention on a gripper shuttle loom of known type
  • FIG. 8 is a diagram illustrating another form of apparatus according to the invention, particularly adapted for incorporation with a known type of gripper shuttle loom;
  • FIG. 9 is another diagram representing the apparatus of FIGURE 8, but in a different position thereof.
  • FIGS. 10 and 11 are perspective views of a part of the apparatus shown in FIGS. 7 to 9, in the rest and operative positions thereof respectively.
  • FIGS. 1 to 3 show warp threads 22 and weft threads 24 and 24' at the edge of a fabric which is woven on a gripper shuttle-type loom.
  • the two ends of the last-inserted weft thread 24, of which only the left-hand end 26 is shown, are held in edge threaded clamps so that the weft thread is held taut.
  • the clamp at the left edge of the fabric is shown at 28.
  • the shed has been changed again after picking of the last weft thread 24'
  • a hook-shaped tuck-in needle 30 has been passed out between the upper and lower halves of the edge portion of the shed, and has passed under the thread end 26 which is held taut by the thread clamp 28.
  • the thread clamp 28 now moves downwardly at right angles to the plane of the fabric so that the thread end 26' is engaged in the hook of the needle 30 as shown in FIG. 2.
  • the needle 30 is drawn in, pulling the thread end 26' thereby into the new shed.
  • the next weft thread is picked through this shed and beaten up together with the thread end 26 in the usual way, by the reed 32 of the loom.
  • the thread end 26 is thereby given the same place in the fabric as the ends 26 of the previously inserted weft threads 24.
  • the ends of part of the weft threads are tucked in in the usual manner, for example as shown in FIGS. 1 to 3. Tucking in of the ends of the other wefts is prevented in the manner illustrated in FIGS. 4 to 6.
  • FIG. 4 immediately after the end 26" of the last-inserted weft thread 24" has been gripped by the thread clamp 28, it is deflected by means of a finger member 34 in such a way that it cannot be engaged by the tuck-in needle 30.
  • the invention is of course not limited to use on looms in which the tucking in is performed with needles. Any other suitable device may be employed to tuck-in those weft ends which are to be tucked in.
  • the thread end 26" is advantageously deflected by the finger 34 in the same direction as that in which the edge thread clamp 28 later moves, after emergence of the needle 30 beyond the edge of the shed, in order to lay the thread end into the hook of the needle, as shown in FIG. 2, when the finger 34 is not operative. Since in the embodiment shown, the movement of the thread clamp 28 is directed downwardly at right angles to the plane of the fabric as indicated by the arrow P in FIG. 5, the thread end 26" is likewise deflected downwardly by finger 34, taking the portion of the thread which would otherwise be engaged by the needle 30 below the level at which the needle emerges from the shed. The needle 30 emerging at the edge of the fabric between the warp threads 22 therefore travels, as shown in FIG.
  • each arm or lever 36 is pivotable about a pin 38 fixed in the side wall 40 of the loom. These pins are displaced from and extend parallel to the axis of rotation of the temples 42 on their respective sides of the loom. In the preferred embodiments of the invention illustrated, each of these pivot pins is located between the temple on its side of the loom and the cloth beam end of the loom, i.e. the left end of the loom as shown in FIG. 7. Between the pivot pin 38 and the finger member 34, the arm 36 has a bend which, in the working position of the arm 36 shown in FIGS. 9 and 11, extends around the temple 42.
  • the finger 34 presses down on the weft thread end between the edge of the fabric and the thread clamp 28 so that the needle 30, which emerges between the warp threads 22 after the change of shed, passes above the thread end.
  • each lever 36 is connected to one end of a pull-rod 44.
  • the lower end of the pull-rod 44 is coupled to a lever 46 which rocks about a pivot 48 stationary in the side wall 40'.
  • a follower 50 is mounted on the lever 46 and is held against a cam 54 by a spring 52 engaging the lever 46.
  • the cam 54 is mounted on a shaft 56 mounted in the side wall 40 and is driven by the main shaft through a sprocket wheel 58 mounted on the shaft 56, a chain 60 and a sprocket wheel 64 mounted on the main shaft 62 of the loom.
  • the reduction ratio between the main shaft 62 and the cam 54 may be given any desired value.
  • FIGS. 8 and 9 The embodiment of the invention shown in FIGS. 8 and 9 is adapted particularly for incorporation into a pre-existing gripper shuttle loom.
  • a striker 66 is mounted on the second end of the lever 46 in position to engage with an angle member 68, the upright arm of which is secured by means of a locking screw 70 to one of the upwardly and downwardly reciprocating heddle frames 72 of the loom.
  • the lever 46 is subjected to the action of a spring 74 anchored to the side wall 40 and which tends to hold the lever in the horizontal position shown in FIG. 8, in which the arm 36 assumes its position of rest, i.e. the position in which the finger 34 does not engage the weft thread ends.
  • the arm 36 is moved into its operating position, shown in FIG. 9, when the angle member 68, during the downward movement of the heddle frame 72, encounters the striker 66 and so entrains the lever 46 with it, against the action of the spring 74.
  • the angle member 68 can be shifted upward or downward in relation to the heddle frame 72 after the locking screw has been slackened, so that the angular position assumed by the arm 36 in the lowest position of the frame 72 can be varied as required.
  • a method of forming a tucked-in selvage on a fabric woven with weft drawn from a stationary supply comprising inserting into each shed tuck-in needles, and deflecting out of the path of the tuck-in needles the ends of the wefts extending beyond the shed at a cyclical rate which is a submultiple of the picking rate.
  • apparatus for preventing weft thread tuck-in comprising a thread deviating member, means mounting said memher for motion transversely of the plane of the fabric between one of said clamps and the adjacent edge of the fabric to engage and deflect weft ends positioned therein out of the path of the tuck-in needles, and means to reciprocate said mounting means at a submultiple of the picking rate of the loom.
  • Apparatus according to claim 2 wherein said loom includes a temple at each edge of the fabric and wherein said mounting means comprise a lever pivoted about an axis parallel to the axis of the one of said temples at said adjacent edge of the fabric.
  • Apparatus according to claim 3 wherein said axis is located between said one of said temples and the cloth beam end of the loom and wherein said mounting means is curved to extend substantially half-way around said one of said temples.
  • said reciprocating means include a cam coupled to the drive of the loom, a follower engaging the cam, and means linking the follower with said lever.
  • said reciprocating means include a second lever having one end linked to said first-mentioned lever, said second lever being pivoted to dispose the other end thereof in the path of a heddle frame of the loom.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US672829A 1966-10-12 1967-10-04 Method and apparatus for forming tucked-in selvages on fabrics woven on looms having bobbinless shuttles Expired - Lifetime US3457966A (en)

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DEE0032629 1966-10-12

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US (1) US3457966A (enrdf_load_stackoverflow)
CH (1) CH479734A (enrdf_load_stackoverflow)
DE (1) DE1535414B1 (enrdf_load_stackoverflow)
FR (1) FR1554708A (enrdf_load_stackoverflow)
GB (1) GB1196925A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3561498A (en) * 1969-01-21 1971-02-09 North American Rockwell Loom fringe motion
US3908708A (en) * 1971-12-27 1975-09-30 Yoshida Kogyo Kk Means for guiding weft threads
US4078586A (en) * 1976-08-26 1978-03-14 Adolph Saurer Limited Method and apparatus for producing a selvage
EP0083905A1 (de) * 1982-01-13 1983-07-20 GebràœDer Sulzer Aktiengesellschaft Frottierwebmaschine mit einer zwischen Riet und Brustbaum in Schussrichtung verlaufenden Breithaltevorrichtung
US4600045A (en) * 1983-04-09 1986-07-15 Continental Gummi-Werke Aktiengesellschaft Pneumatic vehicle tire
US5467802A (en) * 1994-01-21 1995-11-21 The Bentley-Harris Manufacturing Company Woven sleeve with integral lacing cord
US6675837B1 (en) 2000-10-04 2004-01-13 Si Corporation Woven fabric having modified selvage and related assembly and method for the manufacture thereof
WO2015189033A1 (en) 2014-06-13 2015-12-17 Picanol Selvedge forming device for a weft thread

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH595491A5 (enrdf_load_stackoverflow) * 1975-09-02 1978-02-15 Saurer Ag Adolph
DE3320162A1 (de) * 1983-06-03 1984-12-06 Olbo Textilwerke Gmbh, 5650 Solingen Cordgewebe fuer luftreifen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1948051A (en) * 1929-09-23 1934-02-20 Tefag Textil Finanz Ag Weaving
US2990854A (en) * 1958-06-27 1961-07-04 Sulzer Ag Selvage forming on fabrics
US3181568A (en) * 1961-02-24 1965-05-04 Dewas Raymond Device for the formation of selvedges on looms

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE549617C (de) * 1929-09-24 1932-04-29 Tefag Textil Finanz A G Verfahren und Vorrichtung zur Herstellung von Geweben, bei welcher die Schussfaeden durch Greiferschuetzen von feststehenden Spulen abgezogen werden
US2871888A (en) * 1956-06-15 1959-02-03 George W Dunham Method and means for forming selvage
DE1098880B (de) * 1958-06-27 1961-02-02 Sulzer Ag Verfahren und Vorrichtung zur Herstellung von Geweben, die eine durch Einlegen von Schussfadenenden gebildete Kante aufweisen
CH370367A (de) * 1958-06-27 1963-06-30 Sulzer Ag Verfahren und Einrichtung zur Herstellung von Geweben

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1948051A (en) * 1929-09-23 1934-02-20 Tefag Textil Finanz Ag Weaving
US2990854A (en) * 1958-06-27 1961-07-04 Sulzer Ag Selvage forming on fabrics
US3181568A (en) * 1961-02-24 1965-05-04 Dewas Raymond Device for the formation of selvedges on looms

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3561498A (en) * 1969-01-21 1971-02-09 North American Rockwell Loom fringe motion
US3908708A (en) * 1971-12-27 1975-09-30 Yoshida Kogyo Kk Means for guiding weft threads
US4078586A (en) * 1976-08-26 1978-03-14 Adolph Saurer Limited Method and apparatus for producing a selvage
EP0083905A1 (de) * 1982-01-13 1983-07-20 GebràœDer Sulzer Aktiengesellschaft Frottierwebmaschine mit einer zwischen Riet und Brustbaum in Schussrichtung verlaufenden Breithaltevorrichtung
US4600045A (en) * 1983-04-09 1986-07-15 Continental Gummi-Werke Aktiengesellschaft Pneumatic vehicle tire
US5467802A (en) * 1994-01-21 1995-11-21 The Bentley-Harris Manufacturing Company Woven sleeve with integral lacing cord
US5555918A (en) * 1994-01-21 1996-09-17 Bentley-Harris Inc. Method of making sleeve with integral lacing cord
US6675837B1 (en) 2000-10-04 2004-01-13 Si Corporation Woven fabric having modified selvage and related assembly and method for the manufacture thereof
WO2015189033A1 (en) 2014-06-13 2015-12-17 Picanol Selvedge forming device for a weft thread
BE1022146B1 (nl) * 2014-06-13 2016-02-19 Picanol Zelfkantvormingsinrichting voor een inslagdraad
CN106414825A (zh) * 2014-06-13 2017-02-15 必佳乐公司 用于纬纱的织边形成装置
US20170107648A1 (en) * 2014-06-13 2017-04-20 Picanol Selvedge forming device for a weft thread
US9915015B2 (en) * 2014-06-13 2018-03-13 Picanol Selvedge forming device for a weft thread
CN106414825B (zh) * 2014-06-13 2018-03-30 必佳乐公司 用于纬纱的织边形成装置

Also Published As

Publication number Publication date
DE1535414B1 (de) 1971-09-16
FR1554708A (enrdf_load_stackoverflow) 1969-01-24
CH479734A (de) 1969-10-15
GB1196925A (en) 1970-07-01

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