US3312252A - Weft-inserting devices for continuousfeed looms - Google Patents

Weft-inserting devices for continuousfeed looms Download PDF

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Publication number
US3312252A
US3312252A US438537A US43853765A US3312252A US 3312252 A US3312252 A US 3312252A US 438537 A US438537 A US 438537A US 43853765 A US43853765 A US 43853765A US 3312252 A US3312252 A US 3312252A
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United States
Prior art keywords
rigid
resilient member
weft
resilient
blade
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US438537A
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English (en)
Inventor
Dewas Raymond
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Individual
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Individual
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Publication date
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Publication of US3312252A publication Critical patent/US3312252A/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J5/00—Shuttles
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J2700/00—Auxiliary apparatus associated with looms; Weavening combined with other operations; Shuttles
    • D03J2700/10—Shuttles
    • D03J2700/14—Gripper shuttles

Definitions

  • the invention relates to weft-inserting devices for looms with continuous weft feed from large bobbins situated outside the shed. It relates to inserting devices comprising a weft thread gripping device with an elastic clamp, which is opened, in order to release the thread, by a blade which moves the clamp members apart.
  • the elastic clamp of this gripping device consists of a rigid member and a resilient member, the rear part of which has a foot portion generally affixed to the rear portion or seating portion of the rigid member.
  • the front part of the resilient member is provided, at its edge opposite the fell of the cloth with a tooth forming a hook adapted to grip the weft thread, while at its edge facing the reed side it is provided with a wing which extends downwards and towards the rear, beyond the zone comprising the hook. Due to the existence of this wing the front part of the -resilient member has the shape of an angle and is thus rigid, while the remainder is flexible and springy.
  • the progressive raising of the resilient member by the release blade causes, due to tension release, a straightening of the front resilient part, i.e. that part which is included between the contact point of the resilient member and the beginning of the angle; this results, owing to the reduction of the curvature, in a considerable inclination of the bottom of the resilient member in respect of the large surface of the release blade; over a certain distance, therefore, the said blade only operates by its fore extremity, and thus with an increased pressure per unit area, which, owing to the localized temperature rise, causes deterioration of the said release blade.
  • the purpose of the invention is to remedy these drawbacks, and it consists, in general, of a structure in which the greater part of the resilient member rearwardly of the angle, is rendered rigid, the said member nevertheless retaining the required elasticity to enable it to perform its function correctly.
  • the flexible part of the said member is conned to a short portion which precedes the foot portion, so that the resilient member comprises, in combination, a rigid portion which extends from its front extremity, formingva point, to a short distan-ce from the foot portion and then a flexible resilient portion which precedes the foot portion, and finally the foot portion intended to be secured to the rigid member which also advantageously may be rigid.
  • the flexible resilient portion of the resilient member is limited to a portion preceding the foot portion.
  • the resiliency of the member instead of extending over the entire length included between the end of the Vangle and the foot portion, is confined to the portion located in the vicinity of the said foot portion, so that the ascending and descending movements of the resilient member are very close to those which would be carried out by a part hinged on ay shaft in the vicinity of the foot portion.
  • the release blade undergoes less wear.
  • the rigid part of the resilient member being obviously not subjected to deformations and, moreover, ascending a shorter time after having engaged the release blade, the above-mentioned relative longitudinal motion is practically nil in the clamping zone, and causes no wear to take place in the said zone.
  • the opening of the clamp occurs more rapidly and with a iblade position farther away from the clamping zone; this results in greater regularity in the release of the weft thread and enables the position of the blade to be adjusted with greater ease.
  • FIG. l is an elevation, on the side facing the fell, of an improved insertion device having a clamp in accordance with the invention
  • FIG. 2 is a plan view
  • FIG. 3 is an elevati-on, on a larger scale, solely of the resilient member, on the side facing the fell and shown in the operating position as in FIG. 1.
  • 1 is the entire rigid member of theinsertion device and 2 the entire resilient member; 3 is that part of rigid rne'mber 1 which forms a seating portion, to which the resilient member is afiixed by means of screws 4; 5 is the point of the resilient member, 6 the hook, 7 the wing forming an angle iat the end portion of the resilient member, 8 the release blade, and 9 the clamping zone of the weft thread.
  • the resilient member comprises, starting from its front extremity which forms a point 5, a long rigid portion 2a, having an extension in the form of a short resilient part 2b which preceeds the foot portion 2c aixed to the seating portion 3.
  • the rigidity of portion 2a is retained, starting from the point 5, firstly by the presence of the wing forming an angle 7, and then, at a certain distance d behind the hook 6, in order not to impede Vthe action of the hook 6 taking up the weft thread, but
  • Slanted portion 2e is provided on the face of the resilient member which eng-ages seating portion 3. It is thus apparent that the resilient member 2 is composed of three successive main portions, namely, a rigid foot portion 2a, a resilient portion 2b and a rigid portion 2c, as indicated in -FIGURE 3.
  • the release action being brought about while the release blade is at a greater distance from the point 5 of the resilient member and thus from the weft end, it follows that, for a given weft end position, the position of the release blade is farther away from the selvage, thus providing more room to t-he various devices which may be situated in the vicinity of the said salvage.
  • the external face of the rigid part -of the resilient member could comprise longitudinal ribs in order to increase the heat dissipation surface.
  • a clamping member consisting of a rigid member and a resilient member having at one end a foot portion secured iiat against said rigid member and a rigid portion having at its end a clamping zone for clamping the weft thread, said resilient member being rigid over the greater portion of its length and having an intermediate llexible portion of relatively short length extending between said rigid portion and said end foot portion.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US438537A 1964-03-12 1965-03-10 Weft-inserting devices for continuousfeed looms Expired - Lifetime US3312252A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR967117A FR1400421A (fr) 1964-03-12 1964-03-12 Perfectionnement aux inséreurs de trame pour machines à tisser à alimentation continue

Publications (1)

Publication Number Publication Date
US3312252A true US3312252A (en) 1967-04-04

Family

ID=8825348

Family Applications (1)

Application Number Title Priority Date Filing Date
US438537A Expired - Lifetime US3312252A (en) 1964-03-12 1965-03-10 Weft-inserting devices for continuousfeed looms

Country Status (7)

Country Link
US (1) US3312252A (xx)
BE (1) BE660395A (xx)
DE (1) DE1275485B (xx)
ES (1) ES310806A1 (xx)
FR (1) FR1400421A (xx)
GB (1) GB1056581A (xx)
NL (1) NL6502919A (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441061A (en) * 1966-06-10 1969-04-29 Nuova San Giorgio Spa Weft pull and release device for weaving looms having no shuttles
US4497347A (en) * 1981-12-11 1985-02-05 Societe Alsacienne De Construction De Materiel Textile Mechanism for actuating the weft-inserting needles of a weaving loom

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2510622A1 (fr) * 1981-07-28 1983-02-04 Alsacienne Constr Meca Pince de sortie pour l'insertion de la trame dans la foule d'une machine a tisser sans navette

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567993A (en) * 1947-09-09 1951-09-18 Dewas Raymond Weft inserting device
US2923325A (en) * 1955-02-24 1960-02-02 Dewas Raymond Weft feeders for weaving looms

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1066507B (xx) *

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567993A (en) * 1947-09-09 1951-09-18 Dewas Raymond Weft inserting device
US2923325A (en) * 1955-02-24 1960-02-02 Dewas Raymond Weft feeders for weaving looms

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441061A (en) * 1966-06-10 1969-04-29 Nuova San Giorgio Spa Weft pull and release device for weaving looms having no shuttles
US4497347A (en) * 1981-12-11 1985-02-05 Societe Alsacienne De Construction De Materiel Textile Mechanism for actuating the weft-inserting needles of a weaving loom

Also Published As

Publication number Publication date
ES310806A1 (es) 1965-10-01
DE1275485B (de) 1968-08-14
FR1400421A (fr) 1965-05-28
BE660395A (xx) 1965-07-01
NL6502919A (xx) 1965-09-13
GB1056581A (en) 1967-01-25

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