US3250298A - Weaving machine - Google Patents

Weaving machine Download PDF

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Publication number
US3250298A
US3250298A US343668A US34366864A US3250298A US 3250298 A US3250298 A US 3250298A US 343668 A US343668 A US 343668A US 34366864 A US34366864 A US 34366864A US 3250298 A US3250298 A US 3250298A
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United States
Prior art keywords
weft
shed
thread
holding means
holding
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Expired - Lifetime
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US343668A
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English (en)
Inventor
Senn Rudolf
Egli Emil
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Georg Fischer AG
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Georg Fischer AG
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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
    • D03D47/40—Forming selvedges
    • 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

  • Rudol f Senn 5mm Egg R. SENN ETAL WEAVING MACHINE May 10, 1966 4 Sheets-Sheet 5 Filed Feb. 10, 1964 [N VEN TOR. Rudolf Sen/7 Emil Eglz' May 10, 1966 R. sENN ETAL 3,250'293 WEAVING MACHINE Filed Feb. 10, 1964 4 Sheets-Sheet 4 NVENTOR. Rudolf Sen" BY Emi Egli United States Patent O 3,250,298 WEAVING MACHINE Rudolf Senn and Emil Egli, Brugg, Switzerland, assignors to Georg Fischer AG., Brugg, Switzerland Filed Feb. 10, 1964, Ser. No. 343,668 Claims priority, application Switzerland, Feb. 14, 1963, 1,822/63 4 Claims.
  • the present invention relates to a method of and device for tensioning and woofing weft ends in connection with a Weavingmachine of the type illustrated for instance in U.S. Patent No. 2,604,123 'having stationary weft bobbins.
  • selvaging devices For forming a clean selvage, so-called selvaging devices have become known which tuck in or woof into the shed opening the short thread end which protrudes beyond the edge of the fabric. This is done by means of one or more compressed air nozzles or .by mechanical means. These devices are, however, not able to impart upon the thread the desired tension or to hold the thread at the desired tension.
  • an object of the present invention to provide a method of and device for woofing weft ends in connection with a weaving machine with stationary weft bobbins, which will overcome the above-mentioned drawbacks.
  • FIGURES 1 to 4 respectively, diagrammatically illustrate different phases of the movement of the threadholding member during a weft insertion in connection with a standard weaving machine with stationary weft bobbin;
  • FIGURE 5 diagrammatically illustrates an embodiment of a device according to the invention in connection with a weaving machine
  • FIGURE 7 represents a section along the line VII-VII of FIGURE 6;
  • FIGURE 8 is a section valong the line VIII-VIII of FIGURE 7;
  • FIGURE 9 illustra'tes on a scale larger than that of FIG. 7 the lowermost portion of the arrangement of FIG. 7 as seen in the drection of the arrow 47.
  • the method according to the present invention is characterized primarily in that a thread-holding member takes over from an inserting member a weft end Within a shed opening, then pulls said weft end out of the shed opening while the tension of the respective weft is controllable, and finally tucks or woofs
  • the device for carrying out the method according to the present invention is characterized primarily by transmission means operable in synchronism with the thread insertion, which control the movements of a thread-holding member.
  • FIGS. 1 to 4 illustrate a Weaving machine operable in -a standard manner as illustrated and described, for instance, in U.S. Patent No. 2,604,l24 in which, however, the insertion of harpins is shown.
  • Serial No. 343,668 only the first phase of the insertion of a hairpin is shown.
  • the weaving machine is provided with two weft inserting members 14 and 17. These members 14 and 17 are driven by a wheel 19, 19a respectively through the intervention of a steel band 20, 20a.
  • FIG. 1 shows the members 14, 17 at a position shortly prior to the insertion of a weft 21 which is being withdrawn from 'a stationary weft bobbin 18 on one side of the weaving machine.
  • the filling is passing binding means a, 80 and an eyelet guiding means S2.
  • a depressor 83 positions the filling in front of the weft inserting member 17 while the' end of the filling is held between clalnping members 84, 84a.
  • a cutter including the blades 81 land 87 cooperates with t'he clamping members 84, 84a to cut the filling after the insertion of the harpins has been completed.
  • This figure also shows .a thread-holding member 11 the hook 46 of which at this instant is located in -a horizontal plane and is just about to tuck in or woof into the opening shed 13 a short thread end 22 protruding from the adjacent edge of the fabriC and pertaining to the last inserted weft.
  • FIG. 2 shows the next phase, and more specifically, shows the woofed short thread end 22.
  • the thread-holding member 11 occupies its innermost position with regard to the shed.
  • the said thread-holding member has turned about its own axis by 90 so that the hook 46 points vertically downwardly, and now delays its return movement until the inserting member 14 passes the weft 21 by said hook, said weft 21 being taken over from the inserting member 17 approximately in the center of the shed.
  • the thread-holding member 11 has already started its return movement and is just about to take over the weft 21 from the inserting member 14.
  • the thread-holding member-11 with the aid of spring means (to be described later) imparts upon the weft a certain tension and moves out of the shed while returning hook 46 to its previous horizontal position.
  • FIG. 4 shows the weft 21 beaten up by a reed 16 and arrested.
  • the thread member 11 still holds a new short thread end 23 and will tuck in or woof the same during the next movement into the shed.
  • FIG. 5 this figure diagrammatically indicates a breast beam 1 and a weaving machine frame 2 both forming a part of la weaving machine (not illustrated).
  • Said carriage supports a base plate 4 for the woofing mechanism proper.
  • FIG. 5 shows a shaft 70 which represents the main shaft of the weaving machine and has keyed thereto a cam 5.
  • Cam 5 is adapted to actuate the thread-holding member 11 by means described further below, so that in order to make possible the woofing operation, hook 46 moves along a reverse S-shaped path 12 closely by spreader means 15 (temples) toward the reed 16 and during its return stroke, takes over from the inserting member 14 the inserted weft 21. During this last-mentioned operation, the weft passes below a spring 32 into the hook 46. During the return movement of hook 46, the thread slides between spring 32 and hook 46, while the thread will be subjected to the desired tension, in conformity with the pressure exerted thereupon by spring 32. Outside the shed 13, the weft 21 is held under a certain tension by the binding means 80, 80a until it is beaten up by the reed 16, in a well-known manner.
  • FIGS. 6 to 9 illustrate details of the mechanism shown in FIG. 5. More specifically, with regard to FIG. 6, the mechanism comprises a driving rod 6 which, as previously mentioned, is actuated by cam 5
  • lever arm 7 has a fork-shaped portion 44 in which is slidably mounted a slide 26.
  • Slide 26 is provided with a bore 9a pivotally engaged by a stud 9 connected to a lfollower 27 (FIG. 7).
  • the follower 27 is slid-ably arranged in a longitudinal slot 41 of a tubular guiding member 34.
  • guiding pistons 28 and 29 are guiding pistons 28 and 29 respectively connected to 'a pin 30 which is rotatably journalled in follower 27.
  • the tubular guiding member 34 is provided with means for imparting upon the thread-holding member 11 an additional turning movement about its own axis.
  • the guiding piston 29 has by means of a pin 45 connected thereto a twisted flat steel member 31 so that it has two blades 31a, 31b which are offset with regard to each other by approximately 90.
  • the plate 31a slidably extends through a slot 71 of a plate 33 which latter is fixedly connected to the tubular guiding member 34 and to an 'arm 36 of a two-arm lever 35 which is pivotally supported by plate 4 by means of a pivot 38 (FIG. 6).
  • arm 37 is provided with a recess 37a engaged by one end 'of a spring 39 the other end of which rests on a block 40 connected to base plate 4.
  • the tubular member 34 is provided with an arm 42 with a fork-shaped end ro'- tatably carrying a roller 43 for engagement with a cam surface 25a and 25b.
  • roller 43 engages the cam surface 25a.
  • the cam surfaces 25a and 25h are so selected that the reciprocatory movement of rod 6 in cooperation with the longitudinal movement of thread-holding member 11 and the oscillatory movement of lever causes the threadholder 11 to move along a reverse S-shaped path referred to above in connection with the description of FIG. 5. It will ⁇ also be appreciated that spring 39 continuously assures engagement of roller 43 with cam 25.
  • Two-arm lever 36 is fixedly connected to the tubular member 34 in any convenient manner.
  • the lower end (with regard to FIG. 6) of the twisted member 31 is provided with a hook 46 and a leaf spring 32 and forms the thread-holding member which in FIGS. 1 to 4 and FIG. 6 has been generally designated 11.
  • the hook portion 65 of hook 46 is provided with a groove 69
  • the hook portion 46a is provided with a plurality of holes 66, 67 and 68.
  • One of these holes is engaged by one end 32a of leaf spring 32, whereas the other end of said spring 32b rests in groove 69.
  • the end 32b of spring 32 is preferably inserted into a blind hole 64. That portion where the blade 31a merges with the hook 46 is so designed that the warps cannot be caught by the thinner hook portion 65, i.e. the hook portion is thinner than the blade 31a.
  • weft inserting means operable to withdraw wefts from 'a bobbin on 'said supporting means and to move into an opening of said shed for inserting a withdrawn weft thereinto
  • weft pulling means arranged on the other side of said shed and operable to move into said shed and to take over from said weft inserting means a weft inserted thereby into said shed opening and to pull the said weft through said shed so that the end portion of said weft will protrude from said shed and subsequently to release said protruding portion
  • thread holding means arranged on said other side of said shed and alternately movable into and out of said shed for grasping a weft end portion adjacent to said weft pulling means and between the latter 'and said one side of said shed and for holding said weft end portion clamped after it protrudes from said shed until the weft portion pertaining to said clamped portion
  • a Weaving machine in which said spring is adjust'ably connected to said hook for varying the clamping effect of the spring.
  • a weaving machine in which said hook is provided With a plurality of grooves arranged therein at respectively difierent distance from said surface and each adapted selectively to receive the end of said spring opposite said end portion thereof to provide for different bearing pressures of said end portion of the spring on said surface.
  • a Weaving machine in which a tubular support member is provided reciprocabiy supporting said thread-holding means, said hook comprising a twisted bar, and said support member having a slot in the end through which said hook extends for lcausing said oscillating movement or" said thread-ho1ding means in response to reciprocation thereof in said support member.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US343668A 1963-02-14 1964-02-10 Weaving machine Expired - Lifetime US3250298A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH182263A CH400035A (de) 1963-02-14 1963-02-14 Verfahren und Einrichtung zum Spannen und Einschlagen von Schussfadenenden an einer Webmaschine mit feststehenden Schusspulen

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US3250298A true US3250298A (en) 1966-05-10

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US343668A Expired - Lifetime US3250298A (en) 1963-02-14 1964-02-10 Weaving machine

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US (1) US3250298A (cs)
BE (1) BE643333A (cs)
CH (1) CH400035A (cs)
ES (1) ES295915A1 (cs)
GB (1) GB1039776A (cs)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR583104A (fr) * 1924-06-25 1925-01-07 Vosges Atel Des Dispositif de lisière pour tissus à duites simples coupées
US1802311A (en) * 1927-02-04 1931-04-21 Gledhill Walter Loom for weaving having stationary weft supplies
CH172564A (de) * 1932-05-23 1934-10-15 Tefag Textil Finanz Ag Webverfahren und Maschine zur Durchführung desselben.
US2168420A (en) * 1937-08-21 1939-08-08 Magic Automatic Loom Co Loom
US2179069A (en) * 1938-10-14 1939-11-07 Woodruff T Sullivan Selvage forming device
US2906296A (en) * 1956-07-19 1959-09-29 Ancet Victor Marie Joseph Shuttleless weaving looms
FR1254946A (fr) * 1960-01-14 1961-03-03 Procédé de formation de lisière dans les métiers à tisser sans navette, dispositif pour la mise en oeuvre de ce procédé, et tissus présentant une telle lisière
US3115902A (en) * 1959-12-14 1963-12-31 Dewas Raymond Weft end tucking device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR583104A (fr) * 1924-06-25 1925-01-07 Vosges Atel Des Dispositif de lisière pour tissus à duites simples coupées
US1802311A (en) * 1927-02-04 1931-04-21 Gledhill Walter Loom for weaving having stationary weft supplies
CH172564A (de) * 1932-05-23 1934-10-15 Tefag Textil Finanz Ag Webverfahren und Maschine zur Durchführung desselben.
US2168420A (en) * 1937-08-21 1939-08-08 Magic Automatic Loom Co Loom
US2179069A (en) * 1938-10-14 1939-11-07 Woodruff T Sullivan Selvage forming device
US2906296A (en) * 1956-07-19 1959-09-29 Ancet Victor Marie Joseph Shuttleless weaving looms
US3115902A (en) * 1959-12-14 1963-12-31 Dewas Raymond Weft end tucking device
FR1254946A (fr) * 1960-01-14 1961-03-03 Procédé de formation de lisière dans les métiers à tisser sans navette, dispositif pour la mise en oeuvre de ce procédé, et tissus présentant une telle lisière

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Publication number Publication date
ES295915A1 (es) 1965-04-01
GB1039776A (en) 1966-08-24
CH400035A (de) 1965-09-30
BE643333A (cs) 1964-05-29

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