US3720236A - Arrangement for forming a selvage for use on a loom - Google Patents

Arrangement for forming a selvage for use on a loom Download PDF

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Publication number
US3720236A
US3720236A US00147748A US3720236DA US3720236A US 3720236 A US3720236 A US 3720236A US 00147748 A US00147748 A US 00147748A US 3720236D A US3720236D A US 3720236DA US 3720236 A US3720236 A US 3720236A
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United States
Prior art keywords
selvage
threads
selvage threads
eyelet means
eyelet
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Expired - Lifetime
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US00147748A
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English (en)
Inventor
E Strauss
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Ruti Machinery Works Ltd
Maschinenfabrik Rueti AG
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Maschinenfabrik Rueti AG
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C7/00—Leno or similar shedding mechanisms
    • 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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/26—Travelling-wave-shed looms

Definitions

  • the present invention relates to an arrangement for forming a selvage, for use on a loom, and wherein two selvage threads are guided in eyes, the movement of which, during weaving, imparts shed-like movements to the selvage threads whereby they pass or cross eachother so that, when woven up with weft thread insertions in the sheds, a selvage is produced on the fabric being woven.
  • Selvages of the last-mentioned kind can be produced by twisting the warp threads drawn from two bobbins by continuously rotating the bobbins in rhythm with the weaving operation, these warp threads continuously executing a shed forming movement.
  • the provision of rotatable bobbins means a considerably more complicated construction and requires a great deal of space in the zone where the warp threads are located.
  • the present invention is intended to avoid these disadvantages and it is characterized in that one of the selvage threads is located in one of the end positions of its shed-like movement between elongate, thin thread positioning elements or portions extending transversely of said thread and engageable therewith, which elements are reciprocable laterally, i.e., transversely of the shed-like movement of the eyes, so that in their lateral when woven up with the successive weft threads inserted in the weaving of the fabric.
  • the present invention thus offers the advantages of requiring substantially no mechanism to be disposed between the warp threads.
  • the normal threads, drawn from the warp beam can be used as selvage threads.
  • shed-like or shed forming movements can be imparted to the selvage threads by means of heddles which are connected to the healds used for the weaving process.
  • the size and disposition of the shed formed by the selvage threads correspond to those of the shed formed for theweaving process.
  • looms forming wave-like sheds the conditions are such that the shed movement of the selvage threads must coincide with the movement of the weaving thread at the point where the selvage is located.
  • These machines generally comprise a plurality of healds which are arranged side-by-side and which produce sheds that progress in an undulatory manner. Depending upon the width of the fabric, any two of these healds may form the shed where the selvage occurs.
  • the present invention offers the additional advantage of enabling the heddles with the guide eyes for the selvage threads to be secured to any of the healds since no special mechanism is required to be connected to these heddles. In the case of looms form ing wave-like sheds, the distance travelled by the hed- V dles is dependent on the distance of the heddles, i.e.,
  • the healds carrying them, from the shuttles since the shed-angle formed by all the warp threads must always be of the same size.
  • the heddles or healds nearer the shuttles travel a shorter distance during their movement than the heddles or healds more remote from the shuttles.
  • the distance travelled by the heddles is constant so that in such arrangements, the shed movement of the selvage threads cannot be readily interpolated at any point.
  • the compensation in the length of the warp threads necessary for forming the shed is smaller than in the case of the more remote warp threads.
  • the mechanism present on the loom for producing compensation in the length of the warp threads when using a known selvage forming means cannot generally be readily assembled with the warp forming means, whereas in the arrangement in accordance with the invention, by connecting end positions, they alternately or periodically move this selvage thread into register with two guide slots which the heddles with the healds, correct length compensa tion is automatically achieved without any special mea sures.
  • FIG. 1 is a perspective view of a selvage forming arrangement in accordance with the invention
  • FIG. 2 is a view of an example of a selvage formed by this invention.
  • FIG. 3 is a perspective view of another embodiment of selvage forming arrangement according to this invention.
  • FIG. 4 is a perspective illustration of a further embodiment of a selvage forming apparatus or arrangement of the invention.
  • the reference numerals 11 and 12 designate two heddle support bars of heald frames incorporated in a loom that forms wave-like sheds. When the loom is operating, these bars move in opposite directions (see arrows in FIG. 4). For the sake of clarity, other heald frames are not shown in the drawing. The heddles secured to the heald frames are likewise omitted from the drawing.
  • One of a series of shuttles 14 (only one shown) for inserting weft threads into the shed 13 is illustrated about to emerge from the shed. The lower portion of the shuttle 14 rests on reeds 15. The shuttle 14 is moved forward by means of a movement imparted to the reeds 15, this movement progressing in an undulatory manner.
  • the undulatory movement is composed of a succession of up and down movements imparted in turn to the reeds 15, this being indicated by the rearmost reeds shown in the drawing.
  • the woven material is designated by the numeral 26.
  • the two outermost warp threads form selvage threads 16 and 17 which are passed respectively through the eyes or eyelet means 18 and 19.
  • the eye 18 is carried by the heddle and the eye 19 by the heddle 21.
  • On each side of the heddle 20 are selvage thread guide slots 22 and 23, which are bounded on the outside by two arms 24 which carry the heddle 20.
  • the two slots 22 and 23 communicate with each other by way of the cut-away portion or gap 25.
  • the heddle 20 is carried by the bar 11 by way of an arm 24, and the heddle 21 is carried by the bar 21.
  • the heddle 21 can be swung laterally to small extents about the vertical pin 40, and its end positions are limited by two stops.
  • Two thin, elongate thread positioning elements or portions in the form of strings 32 and 33 are stretched between the fixed part of the loom and a lever 31.
  • the string 32 is disposed forwardly, i.e., to the left, and the string 33 rearwardly, i.e., to the right, of the outermost warps or selvage threads 16 and 17. Both strings extend over the bars 11 and 12 and over the heddles 20 and 21.
  • the lever 31 can be swung about the horizontal pin 34 so as to comprise with strings 32 and 33 movement imparting means for locating or moving the selvage threads 16 and 17 to right or left.
  • the tension spring biases that end of the lever which carries the roller 36, towards the eccentric disc 37.
  • the pin 34 is carried by a fixed part of the loom to which the one end of the spring 35 is also attached.
  • the thread 17 is therefore caused to pass through the slot 22 on the front side, i.e., on the left, of the second selvage thread 16, and the eye 19 is also moved forward crossing over in front of the selvage thread 16.
  • the shuttle 14 has inserted a weft thread and has passed out of the shed 13.
  • the heald frames, through bars 11 and 12, change the shed again.
  • the selvage threads 16 and 17 thus again execute a shedlike movement.
  • the eccentric disc 37 has rotated farther so that the lower end of the lever 31 is swung into its right-hand position 31', shown in broken lines.
  • the string 32 which runs by on the front side of the selvage threads 16 and 17, as shown in FIG. 1, presses these threads to the rear or to the right.
  • the selvage thread 17 is thus brought into register with the slot 23.
  • the heddle 21 is swung about the pin 40 into its other end position to the right or rear.
  • the selvage thread 17 during the following heald move ment, is moved past thread 16 through the slot 23 behind or to the right of the selvage thread 16.
  • the eye 19 is also moved by and behind the selvage thread 16.
  • a weft thread is again inserted.
  • a shed change then takes place again and this brings the selvage thread 17 into the unoccupied space of gap 25, and there it is again brought into register with the slot 22 by means of the string 33.
  • a fresh weft thread is inserted by the next following shuttle 14.
  • FIG. 2 which also 'shows the successively inserted weft threads 28.
  • FIG. 3 illustrates a further arrangement which is for forming center selvages extending between two fabrics 41 and 42, the woven material being divided after the weaving operation by cutting between these selvages with a parting-off device 43.
  • Heald-shaft or heddle support bars 111 and 112 are again shown in FIG. 3.
  • the healds through bars 111 and 112 also impart such movement to the heddles and 121, which are provided with eyes or eyelet means 118 and 119, the warp threads forming pairs of selvage threads 116 and 117 thus also being moved in shed-like manner.
  • Two strings 132 and two' strings 133 form selvage thread positioning elements or portions which are secured at the end of the lever 31 and the other ends of these strings are attached to a fixed part 30 of the loom.
  • Lever 31 in this figure is constructed, secured, and operated, e.g., by a rotatable disc 37 as in the previously described embodiment and forms with strings 132 and 133 movement imparting means for locating or positioning of the selvage threads so they will cross.
  • the strings 32 and 33 run above the heddles and 21.
  • the strings 132 and 133 corresponding to the strings 32 and 33, are disposed below the heddles 120 and 121 in the arrangement shown in FIG. 3.
  • a guide slot 122 and a guide slot 123 are provided on either respective side of each of the heddles 120.
  • the strings 132 run on the front side, i.e. to the left, of their respectively associated selvage threads 116 and 117, and the strings 133 run on the rear side, i.e. to the right, of their respective associated threads 116 and 117.
  • the heddles 120 with the eyes 118 and the slots 122 and 123 are here disposed in a first plane, the heddles 121 with the eyes 119 in a second plane parallel therewith, and the laterally movable elements or strings 132 and 133 are disposed in a third plane parallel with the first and second planes, these planes following each other in the order in which they are mentioned above.
  • the front or leftward ones of the heddles 120 and 121 of FIG. 3 are used to produce one of the selvages, and the rear or rightward ones of the heddles 120 and 121 in this Figure are used to form a second selvage which runs parallel with the first selvage.
  • the mode of operation for forming the two selvages is substantially the same as that described in connection with FIG. 1, so that a description thereof would merely be a repetition and is therefore omitted.
  • flexible heddles 121 are provided instead of the swinging heddles of FIG. 1.
  • the eyes 119 on the heddles 121 must also be enabled to move laterally, i.e. between left and right, so that the threads 117 can be alternately brought into register with the slots 122 and 123 and at the same time to enable the eyes 119 to pass before, i.e. to the front or leftward of, and to the rear or rightward of the selvage threads 116.
  • the heddles 120 should not be capable of being deflected in the lateral direction, i.e. by the deflected second selvage threads 116.
  • nylon strings or metal wires as the material for the elements or strings 32, 33, 132 and 133, the diameters of these strings or wires ranging from about 0.5 to about 1.5
  • a suitable form and speed of rotation of, the eccentric disc 37 naturally render it possible to keep the threads 17 and 117 in register with one of the slots 22 and 23 or 122 and 123 during more than two shed changes, and in register with the other of these slots 22 and 23 or 122 and 123 during another number of sheds.
  • the lateral or transverse reciprocatory movement is not limited to the use of strings 32, 33, 132 and 133. It suffices if, at the opening provided by gap and at the corresponding points in FIG. 3, there are present elongate thread positioning elements or portions which run parallel with the slots 22 and 23, and 122 and 123, respectively, and which can be moved laterally to such extents that they can selectively bring the threads 17 and 117 respectively into register with the slots 22 and 23, and 122 and 123.
  • Such an arrangement can be of the kind shown in FIG. 4 for example.
  • the arrangement corresponds substantially with those illustrated in FIG. 1 or FIG. 3.
  • a rod 140 having thread positioning elements as two arms 142 and 143 at one of its ends is operatively secured to the swingable lever 31 instead of the strings as in the foregoing embodiments.
  • a selvage thread 217 in FIG. 4 corresponding to threads 17 or 117 above, passes between the arms 1 42 and 143 through which it is shifted into the gap 225 common to slots 222 and 223 by the shed-like movement of the flexible heddle 221.
  • a rotatable cammed disc 137 of appropriate configuration and lever 31 as in the embodiment first described above, the rod 140 and with it the arms 142 and 143 are moved in the lateral direction, so that the thread 217 is brought into register with the required slot 222 or 223.
  • the rotatable eccentrics 37 and 137 and the levers 31 and rollers 36 form drive means members which together comprise drive means for operating or imparting movement to the thread positioning elements.
  • the rod 140 comprises an extension means connecting the positioning elements there to the reciprocable or oscillating lever 31.
  • a selvage forming arrangement for use on a loom, wherein selvage threads are guided in eyelet means which are moved during weaving to impart shedJike movements to the selvage threads so that they pass each other, comprising: at least two eyelet means each adapted to receive one of at least two selvage threads; means for moving said eyelet means between respective first and second end positions of movement so as to form changing sheds of said selvage threads; at least two elongate selvage thread positioning elements extending transversely of said threads and reciprocable transversely of the shedlike movements of said eyelet means and acting directly upon said selvage threads; at least two guide slots disposed one on each side of one of said eyelet means and extending in the same direction relative to the shed-like movement thereof; and means for altering the position of said thread positioning elements relative to said selvage threads so that in one of theend positions of the said selvage threads one of the selvage threads can be moved periodically by one or the other of said thread positioning elements into register with one
  • said means for moving said eyelet means comprises at least one heddle which is associated with one of the selvage threads and is yieldable in the lateral direction and movable as a result of sideways movement of the said one of the selvage threads.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US00147748A 1970-06-04 1971-05-28 Arrangement for forming a selvage for use on a loom Expired - Lifetime US3720236A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH836270A CH516666A (de) 1970-06-04 1970-06-04 Anordnung an einer Webmaschine zum Bilden einer Gewebekante

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US3720236A true US3720236A (en) 1973-03-13

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US00147748A Expired - Lifetime US3720236A (en) 1970-06-04 1971-05-28 Arrangement for forming a selvage for use on a loom

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US (1) US3720236A (de)
JP (1) JPS5535494B1 (de)
BE (1) BE768049A (de)
CH (1) CH516666A (de)
FR (1) FR2094038B1 (de)
GB (1) GB1341281A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4066105A (en) * 1975-10-03 1978-01-03 Mayer & Cie Method of and apparatus for forming a leno selvage on woven goods
US4589450A (en) * 1984-05-10 1986-05-20 Sulzer Brothers Limited Leno attachment for a weaving machine
US20150246655A1 (en) * 2012-09-27 2015-09-03 Toray Industries, Inc. Woven fabric and process of producing same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2147620A (en) * 1983-10-07 1985-05-15 Kloecker Geb Loom for producing a bound edge fabric
JP2593380Y2 (ja) * 1993-03-16 1999-04-05 ワイケイケイ株式会社 テープ状織物の耳部ほつれ防止構造
GB2426253B (en) 2005-05-20 2009-11-25 Griffith Textile Mach Ltd Apparatus and a method for weaving leno fabric

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US729106A (en) * 1902-09-13 1903-05-26 Horace H Sutcliffe Needle-heddle and leno-cord-stripe motion.
US3376899A (en) * 1965-01-23 1968-04-09 Quintana Juan Tubau Selvedge forming means in looms weaving two fabrics simultaneously

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE296759C (de) *
FR1591096A (de) * 1967-09-27 1970-04-27

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US729106A (en) * 1902-09-13 1903-05-26 Horace H Sutcliffe Needle-heddle and leno-cord-stripe motion.
US3376899A (en) * 1965-01-23 1968-04-09 Quintana Juan Tubau Selvedge forming means in looms weaving two fabrics simultaneously

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4066105A (en) * 1975-10-03 1978-01-03 Mayer & Cie Method of and apparatus for forming a leno selvage on woven goods
US4589450A (en) * 1984-05-10 1986-05-20 Sulzer Brothers Limited Leno attachment for a weaving machine
US20150246655A1 (en) * 2012-09-27 2015-09-03 Toray Industries, Inc. Woven fabric and process of producing same
US9211865B2 (en) * 2012-09-27 2015-12-15 Toray Industries, Inc. Woven fabric and process of producing same

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Publication number Publication date
GB1341281A (en) 1973-12-19
FR2094038B1 (de) 1974-04-26
JPS5535494B1 (de) 1980-09-13
FR2094038A1 (de) 1972-02-04
BE768049A (fr) 1971-11-03
CH516666A (de) 1971-12-15

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