US3738396A - Weft storage device - Google Patents

Weft storage device Download PDF

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Publication number
US3738396A
US3738396A US00238041A US3738396DA US3738396A US 3738396 A US3738396 A US 3738396A US 00238041 A US00238041 A US 00238041A US 3738396D A US3738396D A US 3738396DA US 3738396 A US3738396 A US 3738396A
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US
United States
Prior art keywords
weft
streams
storage device
weft yarn
loop
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
US00238041A
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English (en)
Inventor
E Lussier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Draper Corp
Boeing North American Inc
Dynascan Corp
Original Assignee
North American Rockwell Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by North American Rockwell Corp filed Critical North American Rockwell Corp
Application granted granted Critical
Publication of US3738396A publication Critical patent/US3738396A/en
Assigned to DELTA ACQUISTION CORPORATION reassignment DELTA ACQUISTION CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ROCKWELL INTERNATIONAL CORPORATION
Assigned to DRAPER CORPORATION, reassignment DRAPER CORPORATION, CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE APRIL 1,1982 Assignors: DELTA ACQUISITION CORPORATION,
Assigned to DYNASCAN CORPORATION reassignment DYNASCAN CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ECTEC, INC.
Assigned to CITICORP INDUSTRIAL CREDIT INC. reassignment CITICORP INDUSTRIAL CREDIT INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DRAPER CORPORATION F/K/A DELTA ACQUISITION CORPORATION
Assigned to STANCHART BUSINESS CREDIT, A CORP. OF CA. reassignment STANCHART BUSINESS CREDIT, A CORP. OF CA. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DRAPER CORPORATION
Assigned to DRAPER CORPORATION, A CORP. OF GEORGIA reassignment DRAPER CORPORATION, A CORP. OF GEORGIA RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CITICORP INDUSTRIAL CREDIT, INC.
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
    • 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
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/368—Air chamber storage devices

Definitions

  • ABSTRACT A weft storage device for shuttleless looms having a stationary weft supply which includes a diverting member for separating a source of air under pressure into two streams within which a loop of weft yarn can be formed and temporarily stored for subsequent insertion into a shed formed by cooperating warp threads.
  • the invention relates to shuttleless looms wherein weft yarn is drawn from a stationary supply for insertion.
  • a means for providing a measured uninterrupted supply of weft by sequentially drawing the weft from a measuring device and temporarily storing it with an improved storage device in readiness for presentation to tYe means for inserting it into a shed formed by warp threads immediately upon completion of the previous pick cycle.
  • Fluid jet looms to which the present invention is applicable are of two general types and utilize either compressed air or liquid under pressure to insert a premeasured length of weft yarn, drawn from a fixed source, into a shed formed by warp threads.
  • Such looms include a nozzle device which in timed relation to the weaving cycle releases a jet of air or liquid that engages the free end of a pre-measured length of weft to carry it through the shed. Additionally it is customary to temporarily and sequentially store a premeasured length of weft just prior to its insertion into a warp shed as a loop within devices such as a suction tube or the like. To assure a smooth and trouble free withdrawal of the weft from such devices, the loop of weft stored therein must be controlled so as to maintain a separation between the lengths of yarn defining the stored loop.
  • Spun yarn has a natural tendency, if not held under sufficient tension, to kink and twist upon itself and when an attempt is made to straighten it, the entanglement increases, oftenresulting in breakage of the yarn.
  • the improved weft storage device has corrected the weft control problems described above by providing a device in which the lengths of weft defining the stored loop are'maintained in separation by two distinct air streams. One of a the air streams controls that portion of the stored loop entering the device and the other controls that portion which extends to the so-called outlet port of said device.
  • the improved weft storage device of the present invention is provided with a source of air under pressure that is directed into a diverting means which separates the pressurized air into two distinct streams.
  • a weft inlet port communicates with one of the air streams and a weft outlet port communicates with the other of the two air streams.
  • a blade member disposed intermediate the two air streams and being operatively associated with the diverting means is effective in maintaining said streams in positive separation whereby the two lengths of weft defining a stored loop are each controlled by air streams individual thereto.
  • a further object is to provide a weft storage device that is not subject to lint and waste accumulation and which will maintain a pre-measured loop of weft within the limits of a predetermined area without enclosing said area.
  • a further and more specific object is to provide an improved weft storage device having means for maintaining a pre-measured loop of weft in positive separation and under sufficient tension to prevent its kinking and twisting upon itself.
  • FIG. 1 is a perspective view of a portion of a fluid jet type shuttleless loom showing the weft storage device according to the invention applied thereto;
  • FIG. 2. is an elevational view and partially in section of the weft storage device shown in FIG. 1;
  • FIG. 3 is an end view of the weft storage device shown in FIGS. 1 and 2.
  • FIG. 1 of the drawing wherein only as much of a fluid jet shuttleless loom structure is depicted as is necessary for a complete understanding of the invention, there is shown a portion of the left hand loomside at 10 having a support arm 11 suitably attached thereto on which is carried a weft measuring device in the form of a capstan 12.
  • the weft yarn is identified by numeral 13 and is drawn from a fixed source of supply through suitable guide elements neither of which are shown and then to the continuously rotating capstan 12 on which several wrappings of said weft 13 are made. From the capstan 12 the weft 13 extends into the weft storage device according to the invention, generally identified by numeral 14 which will be more fully described hereinafter.
  • the weft 13 When the weft 13 is drawn from the storage device, it passes through a. thread guide 15 then beneath an intermittent thread clamping device 16, which is caused to function in timed relation to the weaving cycle. From this clamping device 16 the weft 13 passes through a nozzle 17 by which it is propelled into and through an open shed formed by warp yarns 18.
  • reed 19 serves to beat the inserted weft into the fell to form fabric 20 which is held at its so called reeded width by temples 21 (one only shown in FIG. 1).
  • FIG. 2 shows this device in detail
  • a head member 22 within which a diverting means in the form of an apertu-red insert 23 is mounted.
  • This insert 23 includes a pair of spaced apertures 24 and 25 and the ends thereof within the head member 22 are disposed so as to receive and devide a single source of air under pressure into two separate streams. The air flows in the direction of the indicating arrows 26 and 27 in FIG. 2.
  • the head member is necked as at 28 and is connected at this point to any suitable source of air under pressure by means of a feed line 29.
  • the head member 22 includes an integrally formed boss 30 on each side therof which bosses have appropriate openings or passages 31 extending therethrough which are in alignment with openings 32 (one only shown in FIG. 2) in the sides of the insert 23 and which communicate with the apertures 24'and 25.
  • the inner surfaces of openings 31 are tapped to provide for threadable engagement with a pair of bushing elements 33.
  • the purpose of the bushing elements is to provide a passage extending from the exterior of the head member 22 to each of the apertures 24 and 25 provided in the insert 23. With the inner ends of the bushing elements 33 communicating with the apertures 24 and 25 they form inlet and outlet port means through which the weft yarn 13 can enter and exit from the storage device.
  • baffle plate or blade member 34 which is disposed in operative association with the insert 23.
  • the preferred embodiment as illustrated in the Pigs. of drawing shows this-blade member 34 depending from a centrally disposed slot 35 in the insert member within which its upper end is adapted to assemble by any suitable means.
  • the blade member 34 is located intermediate the air streams formed by apertures 24 and 25 and extends in a plane parallel with the direction of flow of said streams.
  • the lower end of the blade member 34 is forked, as at 36, and provides a guide surface for the weft yarn 13 when a stored loop is withdrawn from the device for insertion into a warp shed.
  • a stored loop of weft is withdrawn, that remaining within the device is caused to assume a position as shown in FIG. 2 wherein saidweft extends through the apex of the forked portion 36 and is in position to be acted upon by the airstreams when the subsequent cycle is repeated.
  • the head member 22 and its insert 23 are adapted-to successively receive from the capstan l2 predetermined lengths of weft,
  • the weft is drawn into the storage device through that bushing 33 which defines the inlet port and by means of the separate airstreams formed by apertures 24 and 25, the weft is caused to assume the form of a loop 37 as shown in FIG. 1.
  • a blade member is disposed intermediate said streams and that portion of the loop extending into the storage device is caused to remain within one of the airstreams while that portion extending toward the exit of said device is caused to remain within the other of the two airstreams.
  • the pair of spaced streams of air produced by the apertures 24 and 25 are effective in applying a sufficient amount of tension upon the weft so as to maintain the loop thereof in positive separation while temporarily held within the storage device.
  • a device for storing successively predetermined lengths of weft yarn to be inserted by jets of a selected liquid or gas into sheds formed between cooperating warp yarns comprising;
  • diverting means separating a source of air under pressure into two streams within which a loop of weft yarn can be formed and stored for insertion by the jets;

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US00238041A 1972-03-27 1972-03-27 Weft storage device Expired - Lifetime US3738396A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23804172A 1972-03-27 1972-03-27

Publications (1)

Publication Number Publication Date
US3738396A true US3738396A (en) 1973-06-12

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ID=22896253

Family Applications (1)

Application Number Title Priority Date Filing Date
US00238041A Expired - Lifetime US3738396A (en) 1972-03-27 1972-03-27 Weft storage device

Country Status (8)

Country Link
US (1) US3738396A (it)
JP (1) JPS4913469A (it)
BR (1) BR7301373D0 (it)
CH (1) CH553863A (it)
DE (2) DE2313028A1 (it)
ES (1) ES412775A1 (it)
NL (1) NL7304248A (it)
SU (1) SU465013A3 (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012212169A1 (de) * 2012-07-11 2014-01-16 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Vorrichtung zum Zwischenspeichern von bandartigem Schussmaterial für eine Webmaschine und Webmaschine mit einer solchen Vorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2037158A1 (de) * 1969-07-26 1971-02-18 Umtika Ltd , Amagasaki, Hyogo (Japan) Verfahren und Vorrichtung zur Zufuhrung von Schußgarnen
US3580444A (en) * 1967-09-04 1971-05-25 Strake Maschf Nv Device for localizing an excess in length in a thread

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580444A (en) * 1967-09-04 1971-05-25 Strake Maschf Nv Device for localizing an excess in length in a thread
DE2037158A1 (de) * 1969-07-26 1971-02-18 Umtika Ltd , Amagasaki, Hyogo (Japan) Verfahren und Vorrichtung zur Zufuhrung von Schußgarnen

Also Published As

Publication number Publication date
DE2314569A1 (de) 1973-10-04
BR7301373D0 (pt) 1974-07-25
NL7304248A (it) 1973-10-01
DE2313028A1 (de) 1973-10-18
ES412775A1 (es) 1975-12-16
JPS4913469A (it) 1974-02-05
CH553863A (de) 1974-09-13
SU465013A3 (ru) 1975-03-25

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Date Code Title Description
AS Assignment

Owner name: DRAPER CORPORATION,

Free format text: CHANGE OF NAME;ASSIGNOR:DELTA ACQUISITION CORPORATION,;REEL/FRAME:004097/0735

Effective date: 19820920

Owner name: DELTA ACQUISTION CORPORATION; HORNADAY RD., GREENS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ROCKWELL INTERNATIONAL CORPORATION;REEL/FRAME:004113/0020

Effective date: 19820321

AS Assignment

Owner name: DYNASCAN CORPORATION, 6460 WEST CORTLAND ST., CHIC

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ECTEC, INC.;REEL/FRAME:004060/0081

Effective date: 19821004

AS Assignment

Owner name: CITICORP INDUSTRIAL CREDIT INC., A CORP. OF DE

Free format text: SECURITY INTEREST;ASSIGNOR:DRAPER CORPORATION A CORP. OF GA F/K/A DELTA ACQUISITION CORPORATION;REEL/FRAME:004070/0533

Effective date: 19821021

AS Assignment

Owner name: STANCHART BUSINESS CREDIT, 200 GALLERIA PARKWAY, N

Free format text: SECURITY INTEREST;ASSIGNOR:DRAPER CORPORATION;REEL/FRAME:004539/0198

Effective date: 19860328

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Owner name: DRAPER CORPORATION, GREENSBORO, NORTH CAROLINA A C

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CITICORP INDUSTRIAL CREDIT, INC.;REEL/FRAME:004664/0583

Effective date: 19860331

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