US3844316A - Weft thread holding and cutting device for looms - Google Patents

Weft thread holding and cutting device for looms Download PDF

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Publication number
US3844316A
US3844316A US00309646A US30964672A US3844316A US 3844316 A US3844316 A US 3844316A US 00309646 A US00309646 A US 00309646A US 30964672 A US30964672 A US 30964672A US 3844316 A US3844316 A US 3844316A
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United States
Prior art keywords
weft thread
cutting
gripping
grippers
looms
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Expired - Lifetime
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US00309646A
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English (en)
Inventor
J Palencher
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LEBOCEY IND SOC
SOC LEBOCEY IND FR
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LEBOCEY IND SOC
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Application filed by LEBOCEY IND SOC filed Critical LEBOCEY IND SOC
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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
    • 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
    • D03D47/125—Weft holding devices

Definitions

  • ABSTRACT Primary Examiner-Henry S. .Iaudon Attorney, Agent, or Firm-Jones, Thomas & Askew [57] ABSTRACT
  • the invention relates to a weft thread holding and cutn fi i eifetlq ms f9!
  • the weft thread holding and cutting device for looms for weaving fabric without a shuttle comprises two cutting blades for cutting the weft thread and two means for gripping the end of the'cut weft thread, these two blades, on one hand, and these two means on the other, being movable relatively, which device is characterized in that the two gripping means comprise gripping surfaces cooperating with one another to hold the weft thread, these two surfaces being movable parallel to the trajectory of the weft thread in the loom.
  • the invention relates to a weft thread holding and cutting device for looms for weaving fabric without a shuttle, that is, for looms in which the weft thread is supplied by lateral spools located externally to the loom, the weft thread being drawn through the shed by a projectile provided with pincer hooks at its ends.
  • the weft thread holding and cutting device for looms for weaving fabric without shuttle comprises two cutting blades for cutting the weft thread and two means for gripping the end of the cut weft thread, these two blades, on one hand, and these two means, on the other, being movable relatively, which device is characterized in that the two gripping means comprise gripping surfaces cooperating with one another to hold the weft thread, these two surfaces being movable parallel to the trajectory of the weft thread in the loom.
  • the gripping surfaces comprise additional deformations.
  • one of the gripping means comprises a gripping surface mounted resiliently between the extreme levels on which at one level it is at a level above one of the cutting blades, and at the other at a level below this same cutting blade during the cutting of the weft thread.
  • the two cutting blades and the two gripping means are movable, the two cutting blades and one of the gripping means being controlled positively, the other being controlled negatively.
  • FIG. 1 is a front view of the device
  • FIG. 2 is a view from the right of the FIG. 1, with the cutting blade removed, the holding means being shown in the closed position,
  • FIG. 3 is a partial view of FIG. 2, the holding means being open,
  • FIGS. 4, and 6 are sketches representing the holding and the cutting means, respectively in the open position, in the process of closing and in the closed positron,
  • FIG. 7 is an exploded view showing the elements of the novel weft holder and cutter.
  • the object of the invention is therefore to provide a device for holding and cutting a weft thread in looms for weaving fabric without a shuttle, until the thread that is held is again taken charge of by the loom, when it moves in the same direction for the passage ofa new weft thread.
  • a loom for weaving fabric without a shuttle therefore comprises two devices for holding and cutting weft threads similar to that described, these two devices being placed laterally to the woven fabric, close to the areas in which the projectile ends its course, as is known.
  • a device according to the invention enables the weft thread to be gripped effectively, whatever might be the nature, diameter, degree of torsion, etc... of the latter, without any necessity for accurate adjustment, a delicate task, as is at present necessary for known devices of the same type.
  • the device thus enables a constant gripping pressure to be exerted on a large gripping surface without deteriorating it, for example by crushing the end of the weft thread, this holding operation being carried out substantially at the same level as that of the normal trajectory of the weft thread as it passes through the shed, so that the weft thread is not excessively displaced laterally between its travel position and the position in which it is held and cut.
  • the device illustrated on the accompanying drawings consists of a support 1 fixed, for example, on the batten of a loom for weaving fabric, this support being provided with a shaft 2 receiving the two gripping means 3 and 4 which hold the weft thread and the two cutting blades 5 and 6 which cut the weft thread which has just been gripped.
  • the two gripping means 3 and 4 have surfaces 3, and 4, which are placed parallel to the weft thread 8, so that after pivoting on the shaft 2, they grip the weft thread 8, parallel to its trajectory, as it passes through the shed, that is, without deforming it appreciably which, for certain, would prevent it from being caught by one of the pincer hooks of the projectile.
  • one of the gripping means (means 4) is controlled elastically, so that the gripping operation parallel to the trajectory of the thread takes place under constant pressure without any risk of the thread being crushed, whatever may be the nature, the diameter or the degree of torsion of the latterr. It is quite evident that the thread could be held by replacing, for example, the means 4 by a fixed resilient means made of a natural or synthetic material without thereby departing from the scope of the inventron.
  • this arrangement allows large gripping surfaces to be obtained ensuring optimum holding strength on account of the presence of the additional deformations, such as 9,, 9 provided on the surfaces 3, or 3,.
  • the gripping means 3 and 4 and the cutting means 5 and 6 are actuated simultaneously by means of the studs 9 and I0 mounted at the end of the arm 11 pivoting at 12.
  • This arm 11 9 is controlled pivotally, at the moment the batten of the loom for weaving fabric reaches the position in which the weft thread beating up operation takes place, by the abutment shown schematically at 13 which bears against the end of the arm II to make it pivot in the direction of the arrow F.
  • stud 9 fits snugly in the recesses in gripping means 3 and cutting blade 5, and stud 10 fits snugly in the recess in cutting blade 6.
  • recess 14 in gripping means 4 is larger in size than stud 10 with which gripping means 4 cooperats, and therefore, stud 10 fits loosely in recess 14 of gripping means 4. Gripping means 4 is constantly pushed by spring blade 15 whch is maintained at 16 by the screw adjustment means 17.
  • the gripping force on the weft thread remains therefore substantially constant, while the two cutting blades 5 and 6 cut the weft thread (FIG. 6). It is seen on this Figure, that the gripping means 3 is provided with a recess 3, allowing the various means 3, 5 and 6 to engage in one another without causing any permanent deformation of the weft thread.
  • gripping means 3 and 4 will not open, in accordance with the operating principles of the device, until after the cutting blades 5 and 6 have opened, that is, after the gripping surface 4, has reached a level above that of the cutting blade 6.
  • This delay in opening by gripping means 3 and 4 occurs because as studs 9 and 10 begin moving to open gripping means 3 and 4 and cutting blades 5 and 6, stud 10 moves out of contact with gripping means 4, and spring 15 exerts sufficient pressure on gripping means 4 to keep gripping means 3 and 4 in contact with each other until cutting blades 5 and 6 separate.
  • Device for holding and cutting a weft thread for a shuttleless loom comprising two grippers for holding the weft thread and two cutting blades for cutting the weft thread, said grippers being movably engageable with each other, each of said grippers having a gripping surface which remains parallel to the trajectory of the weft thread in the loom, said grippers and said cutting blades being movably controlled by stud means located in recesses in said grippers and said cuttingg blades, one of said grippers having a recess larger than said stud means to allow substantial relative movement between said gripper and said stud means, and a spring means which contacts and constantly pushes said gripper with the large recess in order to position the gripping area at a level above the area of the cutting blades.
  • said stud means comprises two studs, each of which cooperates with one of said grippers and one of said cutting blades.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US00309646A 1971-11-26 1972-11-27 Weft thread holding and cutting device for looms Expired - Lifetime US3844316A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7142570A FR2160770B1 (enrdf_load_stackoverflow) 1971-11-26 1971-11-26

Publications (1)

Publication Number Publication Date
US3844316A true US3844316A (en) 1974-10-29

Family

ID=9086516

Family Applications (1)

Application Number Title Priority Date Filing Date
US00309646A Expired - Lifetime US3844316A (en) 1971-11-26 1972-11-27 Weft thread holding and cutting device for looms

Country Status (10)

Country Link
US (1) US3844316A (enrdf_load_stackoverflow)
JP (1) JPS4863060A (enrdf_load_stackoverflow)
BE (1) BE791648A (enrdf_load_stackoverflow)
CH (1) CH560781A5 (enrdf_load_stackoverflow)
DE (1) DE2257839A1 (enrdf_load_stackoverflow)
FR (1) FR2160770B1 (enrdf_load_stackoverflow)
GB (1) GB1357239A (enrdf_load_stackoverflow)
IT (1) IT971224B (enrdf_load_stackoverflow)
NL (1) NL7215904A (enrdf_load_stackoverflow)
SU (1) SU724089A3 (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090535A (en) * 1974-08-21 1978-05-23 Toyo Nakanishi Apparatus for forming tucked-in type selvages on a shuttleless weaving loom
US4834145A (en) * 1987-03-09 1989-05-30 Picanol N.V. Apparatus and method for cutting an inserted weft thread
US7806148B1 (en) * 2009-04-28 2010-10-05 Tsudakoma Kogyo Kabushiki Kaisha Carrier rapier
US7810526B2 (en) * 2009-02-16 2010-10-12 Tsudakoma Kogyo Kabushiki Kaisha Insert rapier

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH641121A5 (en) * 1979-10-01 1984-02-15 Saurer Ag Adolph Clamping jaw arrangement on a thread clamp for textile yarns
BE1016183A3 (nl) * 2004-09-08 2006-04-04 Picanol Nv Werkwijze en inrichting voor het klemmen van een inslagdraad bij een weefmachine.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2973017A (en) * 1958-03-31 1961-02-28 Livermore Corp H F Weft end parting and holding devices
CH371756A (de) * 1958-10-17 1963-08-31 Sulzer Ag Verfahren zur Herstellung von profilierten Klemmflächen an Klemmen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1610562A (en) * 1924-08-01 1926-12-14 Crompton & Knowles Loom Works Combined thread cutter and clamp
US3072155A (en) * 1958-09-19 1963-01-08 Sulzer Ag Thread clamp for weaving machines
FR1325416A (fr) * 1962-06-15 1963-04-26 Sulzer Ag Pince-fil pour métier à tisser

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2973017A (en) * 1958-03-31 1961-02-28 Livermore Corp H F Weft end parting and holding devices
CH371756A (de) * 1958-10-17 1963-08-31 Sulzer Ag Verfahren zur Herstellung von profilierten Klemmflächen an Klemmen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090535A (en) * 1974-08-21 1978-05-23 Toyo Nakanishi Apparatus for forming tucked-in type selvages on a shuttleless weaving loom
US4834145A (en) * 1987-03-09 1989-05-30 Picanol N.V. Apparatus and method for cutting an inserted weft thread
US7810526B2 (en) * 2009-02-16 2010-10-12 Tsudakoma Kogyo Kabushiki Kaisha Insert rapier
US7806148B1 (en) * 2009-04-28 2010-10-05 Tsudakoma Kogyo Kabushiki Kaisha Carrier rapier
US20100269949A1 (en) * 2009-04-28 2010-10-28 Tsudakoma Kogyo Kabushiki Kaisha Carrier rapier

Also Published As

Publication number Publication date
FR2160770B1 (enrdf_load_stackoverflow) 1976-04-02
GB1357239A (en) 1974-06-19
BE791648A (fr) 1973-03-16
FR2160770A1 (enrdf_load_stackoverflow) 1973-07-06
NL7215904A (enrdf_load_stackoverflow) 1973-05-29
JPS4863060A (enrdf_load_stackoverflow) 1973-09-03
DE2257839A1 (de) 1973-06-07
SU724089A3 (ru) 1980-03-25
CH560781A5 (enrdf_load_stackoverflow) 1975-04-15
IT971224B (it) 1974-04-30

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