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US3388722A - Shuttleless loom provided with weft thread storing means - Google Patents

Shuttleless loom provided with weft thread storing means Download PDF

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Publication number
US3388722A
US3388722A US531931A US53193166A US3388722A US 3388722 A US3388722 A US 3388722A US 531931 A US531931 A US 531931A US 53193166 A US53193166 A US 53193166A US 3388722 A US3388722 A US 3388722A
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United States
Prior art keywords
weft thread
pipe
bullet
shed
valve
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
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US531931A
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English (en)
Inventor
Sakamoto Toemon
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Individual
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Individual
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Filing date
Publication date
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Publication of US3388722A publication Critical patent/US3388722A/en
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Classifications

    • 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

  • Means which is disposed at one side of the shed forming area and operable before a shed is formed, is adapted to temporarily store a weft thread that has been drawn up from a cone and projected by a first blast of air through an axial bore provided in a bullet.
  • a second blast of air is employed to shoot the bullet through the shed; the weft thread being carried through the shed by means of sliding frictional contact between the bullet and the thread.
  • This invention relates to a shuttleless loom wherein the weft thread is carried through the shed by a blast of air and more particularly to a loom of this type which is provided with a device for temporarily storing the weft thread that has been paid out of a cone until it is projected through the shed.
  • a loom has been proposed wherein a predetermined length of weft thread supplied from a cone is first inserted through the thorough axial bore of a bullet by a blast of compressed air, and then the bullet is shot through the shed carrying the weft thread along with it through the shed, without gripping the thread but by means of sliding frictional contact between the bullet and the thread.
  • the loom requires two fundamental steps of operation: The first is to insert a predetermined length of weft thread fed from the cone through the bullet by a first blast of air; and the second is to shoot the bullet through the shed by a second blast of air.
  • this latter arrangement has the advantage that it requires neither any weft thread gripping means of the bullet nor any means for disposing of the tip end of the weft thread remaining attached to the bullet.
  • a difiiculty has been encountered.
  • a considerable length of weft thread has to be drawn out of the cone in the first step of operation, which requires too long a time for both the first and the second step of operation to be completed within the limited period of time during which the shed is open, especially in case the loom is to be run at a high speed.
  • the primary object of the invention is, therefore, to provide a shuttleless loom which is provided with means disposed at one side of the shed for temporarily storing "ice the weft thread that has been drawn out from a cone and projecting forwardly through a bullet until the shed is opened and the bullet is shot therethrough, carrying the thread along with it.
  • the projection of a predetermined length of weft thread in the first step of operation can be performed regardless of the time of opening the shed. In other words, it is possible to begin the initial projection of the weft thread through the bullet quite a time before the shed is opened. This makes it possible to prepare as great a length of weft thread as is required for broad-cloth beforehand and then shoot the bullet carrying the thread through the shed the moment it is opened. Since the period of time during which the shed is open is to be occupied only by the second step of operation, that is, shooting the bullet through the shed, the loom can be run at a higher speed.
  • FIG. 1 is an elevational view, partly in vertical section, of the weft thread filling device of a shuttleless loom to which the invention is applied;
  • FIG. 3 is an elevational view of one form of the projected weft thread storing means, as viewed from the line BB of FIG. 1;
  • FIGS. 4 and 5 are schematic drawings illustrating the operation of the weft thread storing means
  • FIG. 6 is a front view of another form of the weft thread storing means
  • FIG. 8 is a view similar to FIG. 7 but showing a modified form of the weft thread storing device.
  • FIG. 1 there is shown a weft thread filling device of a shuttleless loom to which the invention is applied.
  • the weft thread filling device is of a pneumatic type and comprises a valve box 10 tightly closed by a valve lid 11 to define a chamber 12 therein.
  • the lid 11 is interiorly formed with a valve seat 13 to which a valve 14 is normally urged by a spring 15 to close a valve port 16.
  • the valve 14 is formed with a thorough axial bore 14' and provided with a valve rod 17 which has a thorough axial bore 17' in alignment and communication with the axial bore 14'.
  • the valve rod 17 projects through the valve box 10 rearwardly thereof to be connected to a fitting 18 which is in turn connected to a valve operating mechanism to be described hereinafter.
  • the fitting 18 is formed with an axial bore 18' connected at one end thereof to the axial bore 17' of the valve rod 17 in alignment therewith.
  • another chamber 19 separated from the chamber 12 by a valve 20 which is normally urged by a spring 21 to be seated on a valve seat 22.
  • the valve 20 is also provided with a rod 23 projecting through the valve box 10 rearwardly thereof to be connected to the valve operating mechanism.
  • a bullet shooting pipe 42 is rigidly connected at its rear end 42' to the valve lid 11 in axial alignment with the valve 14, valve rod 17 and fitting 18.
  • the forward end of the shooting pipe 42 is open towards the shed.
  • a container 43 for storing bullets 44 each having a thorough axial bore 44' which are supplied one after another into the shooting pipe 42.
  • the upwardly facing portion of the circumferential wall of the pipe rear end 42' which is just below the lower exit opening of the container 43, is cut away to permit passage of bullets 44 downwardly into pipe 42.
  • Such passage is normally prevented by a pair of curved doors 45 and 45' which are carried on the top ends of a pair of levers 46 and 47, respectively.
  • Levers 46 and 47 are shown in FIGURES l and 2 as being pivotally supported, as at 48, and provided at the lower ends thereof with slots 46', 47' in which one end of an operating lever 49 is slidahly received.
  • Lever 49 is pivoted at 50 and at its opposite end urged by a spring 51 against a third cam 52 rigidly mounted on shaft 41.
  • the cam 52 Upon rotation of the cam 52, the lever 49 is forced to pivot in such a manner that the end thereof, as viewed in FIGURE 2, is forced to slide upwardly within slots 46, 47' from the positions shown in full line to that shown in phantom.
  • levers 4d, 47 are pivoted to move doors 45 and 45' simultaneously to the open position indicated in phantom in FIGURE 2, to permit a bullet to drop between the open doors into the shooting pipe 42.
  • levers 46, 47 are returned to the full line position illustrated in FIGURE 2, so as to close doors 45, 45' and confine the bullet within the shooting pipe rear end 42.
  • Bullet 44 is held in position adjacent pipe rear end 42' by a stopper rod 53 which has its upper end transversely inserted into the pipe 42 and its lower end linked with one end of a lever 54.
  • the lever is pivoted at 50 and urged by a spring 55 for the opposite end thereof to contact a fourth cam 56 on the shaft 41.
  • the cam 56 is of such a contour that while the valve 20 is open, the stopper 53 is inserted into the shooting pipe 42 to stop the bullet there, and that when the valve 14 is opened, the stopper rod is retracted to permit the bullet to be shot through the pipe 42.
  • the cam 41 moves the lever 33 clockwise to open the valve 20, whereupon compressed air is introduced into the chamber 19 whence the air passes through the outlet port 25, flexible tube 26 and inlet bore 27 of the fitting 18 to be jetted into the axial bore 18' thereof, whereupon the air carries the weft thread introduced through the bore 31 along with it through the axial bores 17' and 14' of the valve rod 17 and the valve 14 to be projected forwardlythrough the axial bore 44 of the bullet, now stopped by the stopper 53, and then through the shooting pipe 42.
  • the characteristic of the invention lies in the provision of a weft thread retaining or storing device disposed between the forward end of the shooting pipe 42 and the shed for storing the projected weft thread therein temporarily until the bullet is shot through the shed, carrying the thread with it.
  • the weft thread storing device comprises a pipe 57 having open opposite ends and. disposed transversely of the axis of the shooting pipe 42.
  • the pipe 57 is at its one end telescopically and slidably inserted into one end of a guide pipe 58 supported on the frame of the machine.
  • the opposite open end of the pipe 57 is so bent that it is brought into registry with the forward open end of the shooting pipe 42.
  • a lever 59 For transverse and telescopic movement of the pipe 57, a lever 59 has its lower end pivoted to the frame of the machine as at 59 and its upper end bifurcated to engage a pin 60 fixed to the pipe 57; and a spring 61 urges a roller follower 62 on the lever 59 against a cam 63 mounted on a shaft 64.
  • the shaft 64 and consequently the cam 63 is rotated by means of a pair of bevel gears 65 and 66, which latter is mounted on the shaft 41 for rotation therewith.
  • contour of the cam 63 is such that upon rotation of the shaft 41 and consequently the cam 63, the lever 59 rocks in opposite directions to reciprocate the storing pipe 57 transversely of the axis of the shooting pipe 42, thereby bringing the bent open end of the pipe 57 into and out of registry with the forward open end of the pipe 42.
  • the sector 71 may be so arranged as to rock in opposite directions for the net 72 to alternately cover and uncover the forward open end of the shooting pipe 42.
  • This modified embodiment is illustrated in FIGURE 8, wherein sector 71 is modified by providing an arm 71 having adjacent one end thereof a roller 76, which is biased into engagement with cam 77 by a suitable spring 78. From viewing FIGURE 8, it will be apparent that upon driven rotation of the cam 77 by shaft 64 from the position shown, spring 78 functions to withdraw net 72 from in front pipe 42, as indicated by arrow 79.
  • a shuttleless loom comprising: means for storing a plurality of bullets each having a thorough axial bore; means for positioning one bullet after another at one side of a shed forming area; means for providing a first and a second blast of air; means associated with the air blast providing means for projecting a predetermined length of weft thread forwardly through the axial bore of the bullet by the first blast of air so that a portion of the projected weft thread remains inserted through the axial bore of the bullet; means disposed between the weft thread projecting means and the one side of the shed forming area for temporarily storing the weft thread that has been projected through the axial bore of the bullet by' the first blast of air; means associated with the air blast providing means for shooting the bullet through the shed forming area by the second blast of air, thereby causing the weft thread to be carried by the bullet through the shed forming area, in sliding frictional contact with the bullet; and means for positioning the weft thread storing means in the path of the weft thread before it is projected by
  • the bullet shooting means comprises a pipe having one end open towards the shed forming area; and wherein the weft thread storing means comprises a pipe having first and second open ends and being movable by the lastmentioned positioning means relative to the open end of the shooting pipe so that one open end of the storing pipe is brought into registry with the first open end of the shooting pipe before the weft thread is projected by the first blast of air, and out of the registry before the bullet is shot by the second blast of air.
  • the shuttleless loom as defined in claim 2 further including means for applying suction through the second open end of the storing pipe simultaneously with the first blast of air.
  • the movable storing pipe includes a movable section and a stationary section, the movable section being telescopically and slidably inserted within the stationary section.
  • the bullet shooting means comprises a pipe having one end open towards the shed forming area; and wherein the weft thread storing means comprises a net movable by the last-mentioned positioning means relative to the open end of the shooting pipe so that the net is brought into a position to cover the open end of the shooting pipe before the weft thread is projected by the first blast of air, and out of the position so as to uncover the same before the bullet is shot by the second blast of air.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US531931A 1965-03-11 1966-03-04 Shuttleless loom provided with weft thread storing means Expired - Lifetime US3388722A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1432665 1965-03-11

Publications (1)

Publication Number Publication Date
US3388722A true US3388722A (en) 1968-06-18

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Application Number Title Priority Date Filing Date
US531931A Expired - Lifetime US3388722A (en) 1965-03-11 1966-03-04 Shuttleless loom provided with weft thread storing means

Country Status (4)

Country Link
US (1) US3388722A (de)
CH (1) CH439162A (de)
DE (1) DE1535406B1 (de)
GB (1) GB1069859A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098300A (en) * 1976-08-03 1978-07-04 Francesco Mollica Shuttleless loom with unidirectional weft thread carriers
US4259996A (en) * 1979-06-29 1981-04-07 Francesco Mollica Shuttleless loom
US4830064A (en) * 1986-09-10 1989-05-16 Textilma Ag Mechanical loom

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395737A (en) * 1966-06-07 1968-08-06 Crompton & Knowles Corp Pneumatic filling inserter
US3412763A (en) * 1966-06-07 1968-11-26 Crompton & Knowles Corp Pneumatic loom
DE4218807C2 (de) * 1992-06-06 1996-07-11 Wetec Webmaschinentechnik Gmbh Beschleunigungsvorrichtung für das Schußeintragsorgan einer Webmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB623735A (en) * 1946-04-11 1949-05-23 Henry Senior Improvements in or relating to looms for weaving and to woven fabrics
US2770261A (en) * 1953-05-27 1956-11-13 Crompton & Knowles Loom Works Loom operating with stationary weft supply
US2902058A (en) * 1954-12-17 1959-09-01 Chicopee Mfg Corp Looms
US3256914A (en) * 1961-12-22 1966-06-21 Albert Hortmann Weaving method and pneumatic loom

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH199995A (de) * 1937-11-12 1938-09-30 Jan Parma Elektrischer Warmwassererzeuger.
US2770271A (en) * 1954-06-04 1956-11-13 Kane Roger Hugh Carpenter's board holding bracket
DE1170879B (de) * 1959-05-25 1964-05-21 Walter Scheffel Luftzufuehrungsvorrichtung an Webmaschinen mit pneumatischer Schusseintragung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB623735A (en) * 1946-04-11 1949-05-23 Henry Senior Improvements in or relating to looms for weaving and to woven fabrics
US2770261A (en) * 1953-05-27 1956-11-13 Crompton & Knowles Loom Works Loom operating with stationary weft supply
US2902058A (en) * 1954-12-17 1959-09-01 Chicopee Mfg Corp Looms
US3256914A (en) * 1961-12-22 1966-06-21 Albert Hortmann Weaving method and pneumatic loom

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098300A (en) * 1976-08-03 1978-07-04 Francesco Mollica Shuttleless loom with unidirectional weft thread carriers
US4259996A (en) * 1979-06-29 1981-04-07 Francesco Mollica Shuttleless loom
US4830064A (en) * 1986-09-10 1989-05-16 Textilma Ag Mechanical loom

Also Published As

Publication number Publication date
CH439162A (de) 1967-06-30
GB1069859A (en) 1967-05-24
DE1535406B1 (de) 1971-03-04

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