US3865149A - Device for storing a thread portion - Google Patents
Device for storing a thread portion Download PDFInfo
- Publication number
- US3865149A US3865149A US366317A US36631773A US3865149A US 3865149 A US3865149 A US 3865149A US 366317 A US366317 A US 366317A US 36631773 A US36631773 A US 36631773A US 3865149 A US3865149 A US 3865149A
- Authority
- US
- United States
- Prior art keywords
- loop
- thread
- predetermined location
- interspace
- plates
- 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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Images
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
- the present invention relates to a device for a weaving loom for storing a thread piece or portion of varying length and which is subjected to the action of a stream of fluid such as air endeavoring to retain the said thread end between two predetermined locations, in the form of a thread loop, there being effected continuous delivery of the thread at one of the said predetermined locations and, at the other of the said predetermined locations, periodic drawing-off of the thread when the latter is inserted into a shed of the loom with the aid of pick inserter means.
- a known method requiring little pull-away force consists in that the weft thread end to be inserted is stored in an elongate tube in which obtains reduced atmospheric pressure retaining the thread as a loop.
- This arrangement has the disadvantages that the maintenance of reduced pressure requires a relatively large amount of energy and that, on inserting the weft thread into the shed, the pick must be displaced completely against the air stream acting on it due to the reduced pressure.
- these storage devices require a plurality of deflecting locations for the weft thread, at which said deflecting locations the said weft thread is, on pull-away, once again subjected to a deceleration effect.
- the present invention is characterized in a device or arrangement that has an injector means that generates, at one of two predetermined locations, a fluid stream serving to convey continuously a thread and by means of which the said thread is retained as a loop having two legs or limbs, and in that there is available, at least at the side of that leg of the loop which is located on the side of the other predetermined location, a free space extending over the entire length of the said loop leg.
- FIG. 1 is a perspective view of a further embodiment of the present invention showing the use of spaced plates and an auxiliary fluid means used in the forming of the thread loop;
- FIG. 2 is a cross-section taken along the line 22 of FIG. 1;
- FIG. 3 is a still further embodiment of the invention showing the use of spaced 'plates in the forming of the thread loop;
- FIG. 4 is a variant of the embodiment according to FIGS. 1 and 2, in which the spaced plates are curved.
- a weft thread 11 travels from a supply bobbin 12 of weft threads to an air injector 14 into which air is fed in the direction of arrow 15.
- the thread 11 is guided through a tube 16 of the injector 14.
- the air flow flowing through the injector 14 endeavors to permanently suck the thread 11 out of the tube 16 in the direction of arrow 22 and to blow it forward where it is formed into the shape of a loop 17.
- the thread II passes through an eyelet 18, then through a controllable yarn brake or thread gripper 19 and a water-jet nozzle 20, and is then inserted by means of the nozzle into shed 21 of a loom.
- the air jet emerging out of the injector 14 is guided by two elongate plates 25, 26.
- the plates 25, 26 may be formed by bending an elongate plate about its centerline 30 extending in the longitudinal direction to form a pinched Ulike cross-sectional shape to form an elongated interspace 31, as is shown in FIG. 2.
- the air jet for forming the thread loop 17 expands laterally out of a slot 27.
- the result of this is that the loop apex 35 also is located continuously externally of the interspace available between the plates 25, 26. This is desirable since, thereby, the air stream of the injector 14 on the curved portion of the thread at the thread loop apex 35 is weak, so that the force acting on the thread loop 17 of the air stream of the injector 14 is relatively small.
- the weft thread inserter nozzle 20 requires less energy for inserting the weft thread or, if the capacity of the said nozzle 20 remains unchanged, an increased insertion velocity is obtained for the weft thread.
- the delivery of the thread into the storage zone is effected to a substantial degree due to the injector effect, i.e. due to the suction in the tube 16, and therefore the tractive force in the zone ofthe thread loop apex 35 can be kept at a low level.
- the nozzle 20 produces a short, powerful water jet. Simultaneously, the yarn brake 19 opens. Due to the action of the water jet, the thread end disposed in the water nozzle 20 and the end of the thread 11 projecting-out at the front end of the nozzle 20 are engaged and the weft thread 11 accompanied by pulling-out of the loop 17 is inserted into the shed 21, thereby shortening the legs 17, '17" of the loop 17. The thread 11 travels for a short instant from the front portion of the injector 14 more or less rectilinearly to the eyelet 18.
- the loop 17 once again commences to be formed until the legs 17', 17" have been elongated, and on the nextfollowing insertion of a weft thread, by means of the nozzle 20 or the weft inserter means 20, the loop 17 is once again consumed.
- the loop leg 17 located on the side of the eyelet 18 is first of all pulled towards the eyelet 18.
- the said leg 17" is located externally of the air jet flowing in the direction 22, so that the air jet, during insertion of the weft thread, does not exert any counterforce on the leg 17".
- pull-out of the loop takes place in such manner that the loop legs 17, 17" travel, according to FIG. 1, towards the right, out of the flow of the air stream flowing in the direction of arrow 22.
- the counterforce produced by the said air stream becomes relatively small and, thereby, a higher insertion velocity for the weft thread 11 is achieved.
- the space on the right-hand side of the air stream flowing in the direction of the arrow 22, i.e., on the side of the eyelet 18 of the said air stream, is free, in order that the weft thread may on pulling out of the loop 17 be able to travel unhindered towards the right and out of the said air stream (see FIG. 1).
- the loop 17 has one portion or leg 17' that ends adjacent to the injector means 14 and defines a first predetermined location and the other leg portion 17" ends adjacent to the eyelet 18 which defines a second predetermined location.
- the air stream flowing out of the injector 14 may be directed upwardly, downwardly, horizontally, or also obliquely. Above all in the case of the two last-mentioned variations, it may be advisable to provide the thread loop 17 with supplementary retaining means, in order to prevent undesirable catching of the loop 17.
- the conditions are such that, in consequence of the lateral expansion of the air some distance from the injector 14, the leg 17 also can be blown out of the interspace between the plates 25, 26. In such a case, a satisfactory loop shape will no longer be afforded.
- apertures 28 are formed in the bent-over portion located opposite the slot 27. The said bent-over portion is closed in the vicinity of the injector 14. The apertures 28 formed some distance from the said injector have the effect that the unilateral expansion of the air jet through the slot 27 is compensated for. Thereby, the leg 17 is, over a relatively considerable length of the plates 25, 26, retained between the plates 25, 26. It is advantageous, with increasing distance from the injector 14, to make the apertures 28 longer or to increase the number thereof per length unit.
- FIG. 2 shows two elements 23, 24. The latter correspond to the delimiting elements provided with the same reference numerals in FIG. 1.
- the loop leg 17 can be urged, by supplementary air streams, into the interspace between the plates 25, 26.
- This may for example be effected by generating, with the aid of the auxiliary nozzles 29, supplementary air streams so directed obliquely away from the slot 27 that they still have a component in the flow direction defined by the injector 14, i.e., are directed in the sense of this flow direction.
- it is advisable to so control the air stream by the auxiliary nozzles 29 that it is interrupted during pull-out of the loop legs 17, 17".
- an injector 14 an eyelet 18, a yarn brake l9 and a weft thread inserter nozzle 20.
- Air blown out from the injector I4 flows first of all through the chamber 32 which is closed on all sides save for the side opposite the injector 14.
- the chamber 32 assists in imparting a desired direction to the air stream.
- Adjacent the open side of the chamber 32 there are provided two elongate plates 33 the broad sides of which are disposed opposite each other and between which there are no lateral walls.
- a weft thread 11 subjected to the air stream of the injector I4 adopts substantially the loop shape shown in FIG. 3, i.e., it is retained by the air stream in approximately the shape shown.
- This embodiment is extremely simple in manufacture and is suitable in particular for relatively light and thin weft yarns.
- the loop leg 17" has per se, due to the guiding thereof through the eyelet 18, the tendency to shift the loop 17 toward the side of the eyelet 18 of the interspace between the plates 33. If this is not sufficient to keep the thread loop apex 35 at least out of the zone of maximum tractive force of the air stream formed by the injector 14, the plates 33 are arranged in conical configuration relative to each other, the plates extending apart from each other from the left to the right in FIG. 3.
- a variant of the example of embodiment shown in FIG. 1 may consist in that the shape imparted to the plates 25, 26 is not straight, but curved. In the case of such an embodiment, the plates would be bent over parallel to the plane of symmetry 30 (FIG. 1), so that the symmetrical position of the plates 25, 26 relative to the plane of symmetry 30 is maintained.
- FIG. 4 The arrangement thus resulting is shown in FIG. 4 in which, again, there are shown the injector 14, the thread 11 blown-in by the said injector and the eyelet 18.
- the slot 27 is also shown.
- the upper one of the two plates, visible in FIG. 4, has been given the reference numeral 34.
- the plates may describe a configuration between a half-circle and a whole circle and they may have the shape of a ring-sector.
- the mode of operation involved in storage of a yarn piece corresponds to that of the example according to FIG. 1.
- the air stream coming from the injector to form the loop and the air stream for inserting the yarn in the shed is supplied from a pressurized air source means 40 through an air supply conduit 42.
- the application of the present invention is not limited to looms having water or air jets for inserting the pick. It may also be used in advantageous manner on machines employing bars or tapes or having slide-type or gripper-carrier type shuttles.
- a device in which said second predetermined location is arranged at a distance from the open slot of said two elongate plates and physically separated from and outside of said two plates.
- a device in which said elongated interspace, along its lengthwise side located on the side of said first predetermined location is closed at the inflow location of the air stream forming said loop and open to a progressive extent with increasing distance from the said inflow location.
- a device in which there are formed in the longitudinal side, located on the side of said first predetermined location, of the elongated interspace, apertures, the dimensioning of which is such that the apex of the thread loop is located continuously externally ofthe interspace and at a predetermined distance therefrom.
- a device in which an auxiliary nozzle means in provided for generating an auxiliary stream of air flowing in said interspace, which said auxiliary stream of air is directed, in relationship to the direction of the air stream forming said loop, obliquely relative thereto and obliquely towards the longitudinal side of the interspace, located on the side of said first predetermined location, and which said auxiliary stream is controllable.
- each of said plates has the shape of a curved ring sector located in one plane to form a curved interspace therebetween.
- a device in which said two plates extend in conical configuration towards each other and towards their longitudinal edges located on the side of said second predetermined location.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH908172 | 1972-06-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3865149A true US3865149A (en) | 1975-02-11 |
Family
ID=4348137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US366317A Expired - Lifetime US3865149A (en) | 1972-06-16 | 1973-06-04 | Device for storing a thread portion |
Country Status (5)
Country | Link |
---|---|
US (1) | US3865149A (de) |
JP (1) | JPS4948956A (de) |
CH (1) | CH546845A (de) |
GB (1) | GB1418580A (de) |
IT (1) | IT972925B (de) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4090536A (en) * | 1976-01-20 | 1978-05-23 | Ruti-Te Strake B.V. | Weaving loom comprising a pneumatically operated storage device |
US4108216A (en) * | 1974-11-11 | 1978-08-22 | Wueger Karl W | Yarn dispensing apparatus for a loom and the method thereof |
US4134435A (en) * | 1977-03-15 | 1979-01-16 | Cornellier Joseph R | Weft storage means for fluid jet loom |
US4149572A (en) * | 1976-05-17 | 1979-04-17 | Saurer Diederichs Societe Anonyme | Device for re-tensioning a weft thread unwinding in a shuttle-less loom |
US4197882A (en) * | 1977-08-18 | 1980-04-15 | Nissan Motor Company, Limited | Fluid jet shuttleless loom with resistance providing means for weft yarn |
FR2499044A1 (fr) * | 1981-02-04 | 1982-08-06 | Bigelow Sanford Inc | Procede et dispositif d'alimentation en fils sans tension et appareil pour fabriquer un fil gonflant |
US4921019A (en) * | 1988-05-02 | 1990-05-01 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Weft insertion in jet loom |
US20030131900A1 (en) * | 2001-12-27 | 2003-07-17 | Tsudakoma Kogyo Kabushiki Kaisha | Weft length measuring storage unit |
CN101838880A (zh) * | 2009-03-18 | 2010-09-22 | 意达(瑞士)有限公司 | 织机中用于纬纱储存的方法和储存装置 |
US20150037104A1 (en) * | 2013-07-31 | 2015-02-05 | Evans Mactavish Agricraft, Inc. | Feed device for linear airflow separator |
IT202000000085A1 (it) * | 2020-01-07 | 2021-07-07 | Lanificio Guasti S R L | Dispositivo di alimentazione di un semilavorato tessile e macchina comprendente detto dispositivo |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7505279A (nl) * | 1975-05-06 | 1976-11-09 | Philips Nv | Wikkelinrichting. |
JPS53131026U (de) * | 1977-03-10 | 1978-10-18 | ||
JPS546957A (en) * | 1977-06-09 | 1979-01-19 | Nissan Motor | Warp yarn tension adjusting apparatus for fragment weaving machine |
JPS5593846A (en) * | 1978-12-29 | 1980-07-16 | Nissan Motor | Weft yarn storing apparatus for shuttleless loom |
JPS58163580U (ja) * | 1982-04-24 | 1983-10-31 | 株式会社豊田自動織機製作所 | 無杼織機における緯糸貯留装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3303857A (en) * | 1963-08-09 | 1967-02-14 | Scheffel Walter | Loom with pneumatic picking means |
US3575217A (en) * | 1968-03-21 | 1971-04-20 | Sulzer Ag | Device for storing weft material in weaving machines |
US3580444A (en) * | 1967-09-04 | 1971-05-25 | Strake Maschf Nv | Device for localizing an excess in length in a thread |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS442201Y1 (de) * | 1965-12-20 | 1969-01-27 | ||
JPS4422532Y1 (de) * | 1966-04-11 | 1969-09-22 |
-
1972
- 1972-06-16 CH CH908172A patent/CH546845A/de not_active IP Right Cessation
- 1972-12-27 IT IT33596/72A patent/IT972925B/it active
-
1973
- 1973-05-01 JP JP48047631A patent/JPS4948956A/ja active Pending
- 1973-06-04 US US366317A patent/US3865149A/en not_active Expired - Lifetime
- 1973-06-18 GB GB2890473A patent/GB1418580A/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3303857A (en) * | 1963-08-09 | 1967-02-14 | Scheffel Walter | Loom with pneumatic picking means |
US3580444A (en) * | 1967-09-04 | 1971-05-25 | Strake Maschf Nv | Device for localizing an excess in length in a thread |
US3575217A (en) * | 1968-03-21 | 1971-04-20 | Sulzer Ag | Device for storing weft material in weaving machines |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4108216A (en) * | 1974-11-11 | 1978-08-22 | Wueger Karl W | Yarn dispensing apparatus for a loom and the method thereof |
US4090536A (en) * | 1976-01-20 | 1978-05-23 | Ruti-Te Strake B.V. | Weaving loom comprising a pneumatically operated storage device |
US4149572A (en) * | 1976-05-17 | 1979-04-17 | Saurer Diederichs Societe Anonyme | Device for re-tensioning a weft thread unwinding in a shuttle-less loom |
US4134435A (en) * | 1977-03-15 | 1979-01-16 | Cornellier Joseph R | Weft storage means for fluid jet loom |
US4197882A (en) * | 1977-08-18 | 1980-04-15 | Nissan Motor Company, Limited | Fluid jet shuttleless loom with resistance providing means for weft yarn |
FR2499044A1 (fr) * | 1981-02-04 | 1982-08-06 | Bigelow Sanford Inc | Procede et dispositif d'alimentation en fils sans tension et appareil pour fabriquer un fil gonflant |
US4921019A (en) * | 1988-05-02 | 1990-05-01 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Weft insertion in jet loom |
US20030131900A1 (en) * | 2001-12-27 | 2003-07-17 | Tsudakoma Kogyo Kabushiki Kaisha | Weft length measuring storage unit |
US6918414B2 (en) | 2001-12-27 | 2005-07-19 | Tsudakoma Kogyo Kabushiki Kaisha | Weft length measuring storage unit |
CN101838880A (zh) * | 2009-03-18 | 2010-09-22 | 意达(瑞士)有限公司 | 织机中用于纬纱储存的方法和储存装置 |
US20150037104A1 (en) * | 2013-07-31 | 2015-02-05 | Evans Mactavish Agricraft, Inc. | Feed device for linear airflow separator |
US9480282B2 (en) * | 2013-07-31 | 2016-11-01 | Evans Mactavish Agricraft, Inc. | Feed device for linear airflow separator |
IT202000000085A1 (it) * | 2020-01-07 | 2021-07-07 | Lanificio Guasti S R L | Dispositivo di alimentazione di un semilavorato tessile e macchina comprendente detto dispositivo |
Also Published As
Publication number | Publication date |
---|---|
CH546845A (de) | 1974-03-15 |
GB1418580A (en) | 1975-12-24 |
JPS4948956A (de) | 1974-05-11 |
IT972925B (it) | 1974-05-31 |
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