US3797532A - Filling thread clamping device for a shuttleless weaving machine - Google Patents

Filling thread clamping device for a shuttleless weaving machine Download PDF

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Publication number
US3797532A
US3797532A US00183006A US3797532DA US3797532A US 3797532 A US3797532 A US 3797532A US 00183006 A US00183006 A US 00183006A US 3797532D A US3797532D A US 3797532DA US 3797532 A US3797532 A US 3797532A
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Prior art keywords
clamping
filling
thread
depressor
face
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Expired - Lifetime
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US00183006A
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English (en)
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P Haltmeier
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Georg Fischer AG
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Georg Fischer 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

Definitions

  • ABSTRACT A filling thread clamping device for a shuttleless weaving machine with selective filling insertion of the loop insertion principle, for periodical, simultaneous clamping of a plurality of filling threads between their stationary supply packages and the warp shed during each filling insertion, with a fixed and movable clamping part, actuated by the weaving machine in the cycle of the filling insertion.
  • the filling thread connected with the cloth selvage is cut at the selvage, whereupon the withdrawing carrier on its way out of the shed pulls the cut thread part over the remaining half of the warp shed.
  • the filling thread between supply package and warp shed must be blocked, so that in this interval it is no longer pulled from the supply package.
  • the length of the filling thread end pulled out over the cloth selvage by the withdrawing carrier thus depends from the exact moment of blocking within the insertion cycle.
  • clamping devices With weaving machines on which a plurality of filling threads, for examplev of different colors, are inserted alternately, clamping devices are known having a number of clamping points equal to the number of filling threads, said clamping points being jointly actuated on each filling insertion.
  • This invention provides a filling thread clamping device that overcomes the above stated disadvantages. In particular, it allows an exact and reproducible adjustment of the individual clamping points in relation to different thread diameters so that blocking of all the filling threads occurs at exactly the same desired moment and in a positive manner.
  • the clamping device accordingly is characterized in that two clamping parts are pivotably connected with each other on an axis positioned at right angles to the direction of movement of the filling threads, with one of the clamping parts provided with a clamping face common to all of the filling threads and the other clamping part having an individual spring loaded depressor, one for each filling thread, movably guided perpendicularly to the plane of said clamping face, and
  • an adjusting member associated with each depressor to determine and control its stop position in relation to the clamping face for effecting a blocking of the filling thread when desired.
  • FIG. 3 is a section along the line 3-3 of FIG. I showing details of an individual spring loaded depressor with a clamping foot thereon;
  • FIG. 4 is an alternate form of the depressor illustrated in FIG. 3 showing a clamping foot in the form of a rubber buffer;
  • FIG. 5 is a second alternate form of the depressor illustrated in FIG. 3 showing a spring clip attached to one of the clamping parts having a portion thereof resting against the clamping face;
  • FIG. 6 is a view in elevation of thread clamping device
  • FIG. 7 is a view in elevation of thread clamping device in lifted position for cleaning.
  • the clamping device of this invention has a lower part 2 fastened to loom side designated as numeral 1 and is provided with a straight or flat filling thread guiding face 3 that carries co-axial studs 4 and 5 on which an upper part 6 pivots in bearings 7 and 8, respectively.
  • Setting nuts 13 are screwed into the upper part 6 and allocated to one each of, for example, four individual filling threads designated as 9, 10, 11, and 12.
  • Each setting nut 13 can be turned by hand for raising or lowering it with respect to the top of the upper part 6 and, at its circumference, nut 13 is provided with indents 14 (see FIG.
  • each depressor 18 is provided with a clamping foot 32, preferably with a cylinder shaped bottom face, and is secured against axial rotation. In the lifted position of the upper part 6 (see FIG. 3), each depressor 18 is held in its adjusted stop position by the biasing force of a compression spring 19 and by stop nuts 20 fastened on the depressor and resting against the upper face of the setting nut 13.
  • the upper part 6 has a nose or projecting element 21 provided at bearing 8, which is pressed against a first arm 23 of an angle lever 26 by a compression spring 22 which is propped between the upper and the lower parts 2 and 6.
  • the angle lever is pivotably borne on an eccentric part 24 of stud 25 which is mounted for rotation in the lower part 2.
  • a pushing rod 28 is guided in the lower part 2 and carries at one end a roller 30 with the other end of the pushing rod operatively connected to a second arm 27 of the angle lever 26 and being angularly disposed to the first arm 23 so that a horizontal movement of pushing rod 28 causes a vertical movement of first arm 23 by'the turning action of angle lever 26 causing the end of first arm 23 to move nose 2] in a vertical direction.
  • the roller 30 follows a cam 29 borne on the weaving machine and rotating in the cycle of the filling insertion (see FIG. 1).
  • the depressors 18 are depressed through the force of the compression springs 19 with the bottom faces of the foot 32 attached to the compressors biased against the face 3 of the lower part 2 with filling threads therebetween, and all the stop nuts are lifted off the setting nuts 13 thus effecting the simultaneous blocking of the filling threads.
  • the setting in height of the depressors 18 is such that on the downward movement of the upper part 6 all feet 32 contact the face 3 of the lower part simultaneously.
  • This position of the setting nuts 13 is marked by a mark 34 (see FIG. I) in one of the indents 14 which is then in engagement with the flat spring 15.
  • the depressors 18 for the thicker threads can be set accordingly higher by unscrewing the corresponding setting nuts 13, so that due to the adjusted position in height of the depressors, all filling threads are blocked at the same moment when the upper part 6 pivots down.
  • the device can be reset instantly to weave yarns of equal diameter.
  • a foot 32 formed from metal is suitable for most filling yarns.
  • depressors with a foot in the form of a rubber buffer 35 can be'used, which also can be provided with a thin, flexible metal sheet or face shield 36 as a covering so as to prevent cutting-in by the filling threads.
  • a further alternative which is shown in FIG. provides for a fiat clip spring 37 for each depressor mounted on the upper part 6, with the curved face of the free end of the spring resting against the face 3 of the lower part and under the depressor.
  • the fiat clip spring acts as a constant brake for the filling threads by keeping a slight tension force on the filling threads at all times as the threads pass between the clip springs 37 and the face 3.
  • the stud 25 is provided with a handle 38. If the stud 25 is turned with the handle by approximately 180, the upper part 6 is lifted substantially off the lower part 2 due to the movement of the angle lever 26 borne on the eccentric part 24 and the force of the compression spring 22. At the same time, the thread intake guide 43 is swung out by the connecting rod 39 due to the movement of the eccentric stud 49. In this position, the whole filling clamp is easily accessible for cleaning.
  • a thread outlet guide 45 is pivotably borne on the studs 46 and 47 on the lower part 2. It is preferably held in the operating position (as shown) by means of a spring loaded snapping ball or detent holding means 48 and can also be swung out for cleaning purposes.
  • a thread clamping device for a shuttleless weaving machine having selective filling insertions of the loop insertion type, for applying an individual exact biasing force to each ofa plurality of filling threads during periodic, simultaneous clamping thereof between their stationary supply packages and the warp shed during each filling insertion
  • clamping means having fixed and movable clamping members pivotably connected to each other on an axis at right angles to said filling thread and actuated by said weaving machine in the cycle of the filling thread insertion, said fixed clamping member having a clamping face common to all filling threads and the movable clamping member having a plurality of spring loaded thread depressor means, one for each filling thread that is movably guided perpendicular to said clamping face; said depressor means adjustably fixed in position with respect to and carried by said movable clamping member during movement thereof so as to be moved positively therewith; adjusting means operatively connected to each depressor means to determine the stop position of the bottom end portion of said depressor means in relation to said clamping face
  • each depressor means is stud shaped and is slidably guided in a bore defined in one of said clamping member and in a bore defined in a setting nut threadedly mounted in said one clamping member, whereby one face of the setting nut serves as a stop face for the setting of the bottom portion of said depressor means in relationship to said clamping face.
  • a filling thread clamping device as defined in claim 7 wherein a compression spring is guided in said bore defined in said one clamping member, being biased between the bottom end of said setting nut and a shoulder positioned on said stud shaped depressor means.
  • a thread clamping device for a shuttleless weaving machine having selective filling insertions of the loop insertion type, for applying a positive individual biasing force to each ofa plurality of filling threads during periodic, simultaneous clamping thereof between their stationary supply packages and the warp shed during each filling insertion characterized in that a fixed clamping means and a movable clamping means are provided, said fixed and movable clamping means pivotably connected to each other on an axis at right angles to said filling thread and actuated by said weaving machine in the cycle of the filling thread insertion, one of said clamping means having a clamping face common to all filling threads and the other clamping means having a plurality of spring loaded depressor means, one for each filling thread that is movably guided perpendicular to said clamping face; and an adjusting means operatively connected to each depressor means to determine the stop position of the bottom end portion of said depressor means in relation to said clamping face; said movable clamping means biased for movement out of its clamping position in
  • a filling thread clamping device as defined in claim 9 wherein said stud is operatively connected to a second eccentric part with a pivotable thread guide operatively connected thereto, whereby rotation of said stud opens said clamping device and pivots said thread guide out of guiding position to permit cleaning of said clamping device.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US00183006A 1970-09-24 1971-09-23 Filling thread clamping device for a shuttleless weaving machine Expired - Lifetime US3797532A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1425670A CH514703A (de) 1970-09-24 1970-09-24 Schussfaden-Blockiervorrichtung an einer mit Schusswahl arbeitenden Greifer-Webmaschine

Publications (1)

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US3797532A true US3797532A (en) 1974-03-19

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US00183006A Expired - Lifetime US3797532A (en) 1970-09-24 1971-09-23 Filling thread clamping device for a shuttleless weaving machine

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US (1) US3797532A (fr)
CH (1) CH514703A (fr)
DE (1) DE2143641C3 (fr)
FR (1) FR2108412A5 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4431036A (en) * 1981-01-30 1984-02-14 Sulzer Brothers Limited Mechanism for braking a weft yarn in a weaving machine
GB2196994A (en) * 1986-11-06 1988-05-11 Dornier Gmbh Lindauer Weft thread brake
US6460578B2 (en) * 1999-12-08 2002-10-08 Texo Ab Brake arrangement for a number of threads of yarns which can be fed in or to a textile machine
US20070169830A1 (en) * 2006-01-24 2007-07-26 Sultex Ag Controlled thread brake

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4467841A (en) * 1980-09-02 1984-08-28 Aktiengesellschaft Adolf Saurer Clamping jaw arrangement of a thread clamp for textile yarns or the like
FR2510150A1 (fr) * 1981-07-23 1983-01-28 Saurer Diederichs Sa Frein de trame pour machine a tisser sans navette
FR3132046B1 (fr) 2022-01-25 2024-01-19 Mf Tech Machine et procédé d’enroulement filamentaire avec application de résine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2209839A (en) * 1940-02-19 1940-07-30 Long John Russell Thread control device
US2665716A (en) * 1951-01-25 1954-01-12 Draper Corp Method and mechanism for filling control in shuttleless looms
US3340903A (en) * 1964-10-10 1967-09-12 Golobart Ramon Balaguer Tensioning and regulating device for the passage of weft threads of different thickness
US3633711A (en) * 1968-10-23 1972-01-11 Sulzer Ag Thread brake

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2209839A (en) * 1940-02-19 1940-07-30 Long John Russell Thread control device
US2665716A (en) * 1951-01-25 1954-01-12 Draper Corp Method and mechanism for filling control in shuttleless looms
US3340903A (en) * 1964-10-10 1967-09-12 Golobart Ramon Balaguer Tensioning and regulating device for the passage of weft threads of different thickness
US3633711A (en) * 1968-10-23 1972-01-11 Sulzer Ag Thread brake

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4431036A (en) * 1981-01-30 1984-02-14 Sulzer Brothers Limited Mechanism for braking a weft yarn in a weaving machine
GB2196994A (en) * 1986-11-06 1988-05-11 Dornier Gmbh Lindauer Weft thread brake
US4817681A (en) * 1986-11-06 1989-04-04 Lindauer Dornier Gesellschaft Mbh Weft thread brake mechanism for shuttleless looms
GB2196994B (en) * 1986-11-06 1990-02-14 Dornier Gmbh Lindauer Weft thread brake with controlled brake action for a shuttleless loom
US6460578B2 (en) * 1999-12-08 2002-10-08 Texo Ab Brake arrangement for a number of threads of yarns which can be fed in or to a textile machine
US20070169830A1 (en) * 2006-01-24 2007-07-26 Sultex Ag Controlled thread brake

Also Published As

Publication number Publication date
CH514703A (de) 1971-10-31
DE2143641B2 (de) 1974-12-12
FR2108412A5 (fr) 1972-05-19
DE2143641A1 (de) 1972-03-30
DE2143641C3 (de) 1975-07-24

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