US3677304A - Pneumatic rapier for inserting weft thread into warp sheds - Google Patents

Pneumatic rapier for inserting weft thread into warp sheds Download PDF

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Publication number
US3677304A
US3677304A US45003A US3677304DA US3677304A US 3677304 A US3677304 A US 3677304A US 45003 A US45003 A US 45003A US 3677304D A US3677304D A US 3677304DA US 3677304 A US3677304 A US 3677304A
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US
United States
Prior art keywords
tube
weft thread
rapier
casing
closest
Prior art date
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
Application number
US45003A
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English (en)
Inventor
Nikolai Ivanovich Makachev
Alexei Nikolaevich Parshin
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Individual
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Individual
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Filing date
Publication date
Priority claimed from SU1339167A external-priority patent/SU290721A1/ru
Priority claimed from SU1341950A external-priority patent/SU274991A1/ru
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3677304A publication Critical patent/US3677304A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

  • the present invention relates to devices for inserting a thread into the warp shed, and more specifically to rapiers for use in air jet looms.
  • rapiers for weft thread insertion comprising a tube located in a casing, with one end of the tube being connected to an attachment for generating therein a pressure flow to deliver the end of the weft thread into the warp shed, while the other end of the tube terminates inside the casing in the form of a cap, or a pipe.
  • the cap or pipe is sheared at its end, thus being sharpened for a more accurate separation of the warp threads forming the shed, and projects beyond the end of the inner tube.
  • the attachment generating the pressure flow is connected to the tube through a chamber and a socket, and the weft thread is introduced into this tube through a sleeve located some distance from the tube end.
  • location of the sleeve some distance from the tube end causes air eddying inside the chamber, with part of the air being thrown out into the atmosphere through the sleeve hole, thereby leading to a waste of compressed air, and to a reduced tension of the weft thread. This affects the quality of the weft thread insertion into the shed formed by the warp threads.
  • the basic object of the invention is to provide a rapier for weft thread insertion into the warp shed, with such a design of the tube, that the compressed air flow in the rapier is, at both the tube inlet and outlet, more organized, not distorted and not eddying, and at the same time ensuring a quality insertion of the weft thread into the warp shed.
  • the rapier for weft thread insertion into the warp shed includes a tube in a casing, one end of the.
  • the tube being connected to an attachment generating therein a pressure flow to deliver the end of a weft thread into the warp shed, the free end of the tube, according to the invention, projecting from the casing in the direction of the weft thread movement, and being sheared at an angle so that the far end of the shear is the closest to the reed, while the near end is the closest to the fabric fell.
  • Such a design completely prevents the distortion and eddying of the air flow at the outlet from the tube, and respectively provides for a more accurate transfer of the weft thread end into the receiving rapier.
  • the projecting end of the tube is preferably narrowed whereby the air flow is still more concentrated.
  • the tube end connected to the air pressurizing attachment may be shaped as a restriction, adjoining which restriction are a threaded sleeve provided with a hole for passing the weft thread, and a socket leading from a compressed air source.
  • This arrangement prevents the detrimental effect of air eddying inside the chamber and the sleeve hole on the weft thread, and also eliminates air wastage into the atmosphere, thus improving the weft thread insertion into the warp shed, reducing air consumption, and improving the threading of the weft thread into the threaded sleeve.
  • FIG. 1 is a general front view of the rapier according to the invention
  • FIG. 2 is a fragmentary top view, partly in elevation and partly in section of the tube end projecting from the casing;
  • FIG. 3 is a fragmentary view in section of another embodiment of the projecting tube end.
  • FIG. 4 is a fragmentary sectional view showing the tube end connected to the air pressurizing attachment.
  • the rapier comprises a casing 1 (FIG. 1) in which a tube 2 is located and a reciprocatory movement is imparted to the rapier (the rapier movement is conventionally shown by arrow A) through a system of hollow levers 3 and 4, with the lever 3 being connected by socket 5 to one end of the tube 2.
  • the lever 4 is mounted on a hollow rotating shaft 6 to which is secured a nipple 7, and connected to the nipple is piping 8 communicating with a source of compressed air (not shown).
  • the movement of the compressed air is conventionally shown by arrow B.
  • a free end 9 (FIG. 2) of the tube 2 projects from the casing l and extends into the shed formed by warp threads 10.
  • Such a design of the tube precludes the air flow eddying at the outlet therefrom, and respectively provides for a more accurate transfer of the end of a weft thread 15 into the receiving rapier (not shown).
  • Adjoining opposite end 16 (FIG. 4) of the tube 2 are a threaded sleeve 17 with an opening 18 for the weft thread 15, and the socket 5, which embraces the sleeve 17, thus forming a chamber 19.
  • the walls of the end 16 of the tube 2 in the place, where the tube adjoins the sleeve, are constricted.
  • Such a design secures an efi'ect of ejection for a reliable aspiration of the weft thread into the sleeve 17.
  • the end 16 of the tube 2 can be straight and in this case, there is also created an ejection effect, but such effect is a weaker one.
  • the casing l i.e. the rapier
  • the casing l has reciprocatory movement impartedthereto from the rotating shaft 6 through the hollow levers 3 and 4.
  • clean compressed air is fed through piping, nippie 7, hollow shaft 6, and hollow levers 3 and 4 into the socket 5.
  • the compressed air enters the chamber 19, and then through the end 16 of the tube 2, with an ejection effect being created at such location thereby ensuring air aspiration from the atmosphere into the opening 18 of the sleeve 17.
  • such thread is positioned near the opening 18, and is drawn into the opening of the sleeve 17.
  • the thread 15 passes into the tube 2, in which it is main tained in tension by the air flow, and then, together with the rapier, is forwarded into the warp shed to be transferred into the receiving rapier.
  • the air flow entrains the thread 15, and emerges from the end 9 of the tube 2 in a concentrated form, without eddies or distortions, and as it meets the receiving rapier, it transfers the thread into the suction flow of the receiving rapier;
  • the air flow emerging from the narrowed end 9 of rapier 2 (another version) is still more concentrated. Passing through the rapier, the thread 15 is laid down in the warp :shed, and is then beaten by the reed 12.
  • a rapier for inserting a weft thread into a warp shed of a loom having a reed including a casing, a tube located in an extending axially of the casing, said tube having opposite ends, a socket attached to the casing and extending laterally therefrom adjacent one end of the tube, a sleeve embraced by the socket and having a bore for a weft thread, the bore communicating with the interior of the tube at said one end thereof, the other end of the tube projecting from the end of the casing in the direction of wefi thread movement, the butt of said other end of the tube being sheared at an angle and thereby sharpened, with the far end of the shear being closest to the reed and the near end being closest to the fell of the fabric, the tube adjacent said one end thereof having a constriction, and said socket communicating with a source of compressed air for drawing the weft thread into the sleeve bore and thence into the tube for movement into the warp shed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Jet Pumps And Other Pumps (AREA)
US45003A 1969-07-18 1970-06-10 Pneumatic rapier for inserting weft thread into warp sheds Expired - Lifetime US3677304A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SU1339167A SU290721A1 (ru) 1969-07-18 1969-07-18 Рапира,падающа на конец уточной нити в зев основы ткацкого станка
SU1341950A SU274991A1 (ru) 1969-08-04 1969-08-04 Рапира дл прокладки уточной нити в зеве основы ткацкого станка

Publications (1)

Publication Number Publication Date
US3677304A true US3677304A (en) 1972-07-18

Family

ID=26665353

Family Applications (1)

Application Number Title Priority Date Filing Date
US45003A Expired - Lifetime US3677304A (en) 1969-07-18 1970-06-10 Pneumatic rapier for inserting weft thread into warp sheds

Country Status (4)

Country Link
US (1) US3677304A (enrdf_load_stackoverflow)
CH (1) CH510766A (enrdf_load_stackoverflow)
GB (1) GB1289013A (enrdf_load_stackoverflow)
NL (1) NL7010651A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1418262A1 (en) * 2002-11-05 2004-05-12 Tsudakoma Kogyo Kabushiki Kaisha Weft inserting nozzle of air jet loom and pipe as used therein
RU2400579C1 (ru) * 2009-02-24 2010-09-27 Государственное образовательное учреждение высшего профессионального образования "Ивановская государственная текстильная академия" (ИГТА) Рапира ткацкого станка

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH609106A5 (enrdf_load_stackoverflow) * 1976-04-13 1979-02-15 Rueti Ag Maschf
JPS5771445A (en) 1980-10-15 1982-05-04 Nissan Motor Wefting nozzle of air jet type loom
NL8007127A (nl) * 1980-12-31 1982-07-16 Rueti Te Strake Bv Inrichting voor het door middel van een stromend medium inbrengen van een draad in het weefvak van een pneumatische weefmachine.
US4550752A (en) * 1980-11-17 1985-11-05 Ruti-Te Strake B.V. Method for conveying a flexible thread by means of pressurized gas
FR2497240A1 (fr) * 1980-12-30 1982-07-02 Saurer Diederichs Sa Dispositif a buse mobile pour insertion pneumatique de la trame sur une machine a tisser sans navette
DE3328927T1 (de) * 1982-01-28 1984-10-18 Bonas Machine Co. Ltd., Sunderland Schußfaden-Einziehanordnung
US4787424A (en) * 1986-10-15 1988-11-29 Klimovskoje Spetsialnoje Knostruktorskoje Bjuro Po Projektirovaniju Tkatskogo Oborudovanija Method of inserting loops of continuous weft thread in a needle loom
FR2606041B1 (fr) * 1986-10-30 1989-02-03 Klimovskoe Sp Konstrukt Mecanisme d'insertion du fil de trame pour metier a tisser a aiguille pneumatique
FR2606042B1 (fr) * 1986-10-30 1989-02-03 Klimovskoe Sp Konstrukt Procede d'insertion du fil de trame sur un metier a tisser a aiguille pneumatique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU161669A1 (enrdf_load_stackoverflow) *
US1721940A (en) * 1928-06-28 1929-07-23 Lorraine Mfg Company Pneumatic weft-introducing mechanism for looms
FR1261463A (fr) * 1959-05-25 1961-05-19 Métier à tisser à insertion pneumatique de la trame
US3367371A (en) * 1965-02-23 1968-02-06 Strake Maschf Nv Device for introducing a weft thread into a shed

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU161669A1 (enrdf_load_stackoverflow) *
US1721940A (en) * 1928-06-28 1929-07-23 Lorraine Mfg Company Pneumatic weft-introducing mechanism for looms
FR1261463A (fr) * 1959-05-25 1961-05-19 Métier à tisser à insertion pneumatique de la trame
US3367371A (en) * 1965-02-23 1968-02-06 Strake Maschf Nv Device for introducing a weft thread into a shed

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1418262A1 (en) * 2002-11-05 2004-05-12 Tsudakoma Kogyo Kabushiki Kaisha Weft inserting nozzle of air jet loom and pipe as used therein
RU2400579C1 (ru) * 2009-02-24 2010-09-27 Государственное образовательное учреждение высшего профессионального образования "Ивановская государственная текстильная академия" (ИГТА) Рапира ткацкого станка

Also Published As

Publication number Publication date
NL7010651A (enrdf_load_stackoverflow) 1971-01-20
CH510766A (de) 1971-07-31
GB1289013A (enrdf_load_stackoverflow) 1972-09-13

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