EP1764433A1 - Yarn feeder - Google Patents
Yarn feeder Download PDFInfo
- Publication number
- EP1764433A1 EP1764433A1 EP05108612A EP05108612A EP1764433A1 EP 1764433 A1 EP1764433 A1 EP 1764433A1 EP 05108612 A EP05108612 A EP 05108612A EP 05108612 A EP05108612 A EP 05108612A EP 1764433 A1 EP1764433 A1 EP 1764433A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarn
- threading hole
- feeder
- yarns
- hole
- 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.)
- Withdrawn
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Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/38—Devices for supplying, feeding, or guiding threads to needles
- D04B15/54—Thread guides
- D04B15/58—Thread guides for circular knitting machines; Thread-changing devices
Definitions
- the present invention relates to a yarn feeder for circular knitting machines and particularly to a yarn feeder to aid feeding three yarns into a circular knitting machine for a plurality of knitting needles.
- yarns and fibers may be made from many different sources.
- Different types of yarns are being developed to give people more comfortable clothing. These days, animal furs, nylon fibers and the like are widely used in clothing fabrics.
- Yarns made from plant fibers also are used to make fabrics through circular knitting machines. These fabrics also are widely used to make clothes for people. Knitting of fabrics through the circular knitting machines usually requires a yarn feeder to aid yarns to be moved to a yarn hook position so that knitting needles can pick up the yarns and form loops in the knitting process.
- the yarns are often attached with floss or prone to breaking.
- a poorly designed yarn feeder tends to accumulate the floss or produce broken yarns. This results in lower quality of the fabrics. Or yarn threading has to be done repeatedly and results in lower production speed.
- R.O.C. patent publication No. 394272 entitled “Improved yarn feeder for knitting machines” proposes a yarn feeder which has an inclined guiding groove below a hole of the yarn feeding portion at a lower side.
- the hole and the guiding groove form a juncture which has a yarn guiding aperture to enable yarns to be disposed on correct positions. And two neighboring yarns are spaced from each other at a desired distance.
- yarn feeding is smoother and yarn breaking can be reduced.
- the yarns traveling through the inclined guiding groove incur friction due to contact and generate a high temperature. This, plus the inclined angle of the guiding groove, is prone to break the yarns.
- R.O.C. patent publication No. 529639 entitled “Improved yarn feeder for knitting machines” discloses a technique to overcome the problem of broken yarns mentioned above. It has a screw hole on an upper side of a yarn feeding portion of the yarn feeder to allow a bolt to fasten an auxiliary member to the yarn feeder in an inclined manner.
- the auxiliary member has a narrow trough on an upper portion and a yarn feeding hole on the bottom. By adjusting the fastening position of the bolt relative to the narrow trough, the angle and distance of the yarn feeding hole may be adjusted corresponding to the knitting requirements of different yarns and knitting needles. Thereby knitting operation of the yarns is steadier and smoother.
- the main features are the yarn feeding hole on the yarn feeder and the adjustable auxiliary member.
- the auxiliary member is moved upwards relative to the knitting needles. As a result, the angle between the yarns is smaller. Interference frequently occurs. This generates static charge resulting from friction incurred by high speed movement between the yarn feeder and knitting needles. If the auxiliary member is moved lower relative to the knitting needle to increase the distance between the yarns, the interval of the yarn feeders has to be increased as more than one yarn feeder and knitting needle are located on the circular knitting machine. This will increase the fabrication cost.
- the yarn feeding hole has a sharp edge relative to the yarn. It tends to cut off the yarn. The friction between the yarn and the hole edge also tends to accumulate floss. This will make passing of the yarn difficult when the floss is accumulated to a certain degree, and result in yarn fracturing or knitting the floss in the fabric. The finished fabric would have bumps and result in a lower fabric quality.
- R.O.C. patent publication No. 491300 entitled “Improved yarn feeder for circular knitting machines” granted to the Applicant aims to eliminate floss accumulation on the yarn. It includes a jutting yarn guiding portion on another end of a yarn feeder that is formed with a smooth and curved surface. The yarn can smoothly pass through the yarn guiding portion to enter the yarn hook of the knitting needle. The yarn guiding portion is exposed, thus the floss accumulated on the yarn guiding portion can be removed easily. Moreover, the yarn feeding portion of the yarn feeder has two yarn threading holes to thread yarns. No much additional space is needed. However, the yarns are still spaced from each other at a short distance. Static charge occurs during high speed movement of the yarn.
- the conventional yarn feeders previously discussed mainly have two problems: First, yarn breaking. It is mainly caused by floss accumulation, the angle of the yarn passing through the threading hole, and the friction between the yarn and the yarn feeder. Floss accumulation is caused by the characteristics of the yarn and not avoidable. However, altering the angle of the yarn passing through the yarn threading hole can reduce yarn breaking. On the other hand, while the friction cannot be totally eliminated, the friction between the yarn and the yarn feeder still can be reduced through a suitable means. Second, the problem of the interference between the yarns. This is caused by static charge resulting from friction occurred to the yarns of a too short interval moving at high speed. The yarns tend to attach to one another and result in not smooth moving. Hence increasing the interval of the yarns is a solution to overcome this problem.
- the invention provides a yarn feeder to feed three yarns for multiple knitting needles of a circular knitting machine.
- the yarn feeder has two yarn threading holes and a yarn guiding member corresponding to the threading positions of the tree yarns. Hence the three yarns can enter smoothly into the yarn feeder corresponding to the hook of the knitting needle to be combined into one thread without interference or entangling.
- the relative positions of the threading holes are changeable to increase the intervals of the three threads to achieve a steady yarn feeding.
- Another object of the invention is to reduce floss accumulation while the yarns pass through the yarn feeder, and reduce thermal deformation of the thread holes.
- Each of the thread threading holes is coupled with a porcelain eye which is smooth and heat-resistant. This enhances the smoothness and heat resistance of the yarn threading hole.
- Yet another object of the invention is to have the yarn guiding member exposed. And a detent member is provided on one end of the yarn feeder opposing another end where the yarn guiding member and the yarns are in contact. Hence in the event that the yarn is loosening off from the yarn guiding member, it is confined from escaping.
- Still another object of the invention is, asides from providing two dimensional intervals among the three yarns, to include the height of the porcelain eye, or lower the elevation of the yarn threading holes to form an elevation difference between them to increase the distance of the yarns entering the yarn feeder.
- a three dimensional interval is formed among the three yarns to reduce the interference among them.
- the invention includes a yarn feeder 10 located on a circular knitting machine to thread three yarns 30, 31 and 32, and feed the yarns 30, 31 and 32 to a corresponding knitting needle 20.
- the knitting needle 20 has a hook 21 to combine the three yarns 30, 31 and 32 into one thread.
- the yarn feeder 10 has an indented yarn feeding portion 11 on one end opposing the knitting needle 20.
- the yarn feeding portion 11 has a first yarn feeding surface 111 on which the three yarns 30, 31 and 32 pass through.
- On the first yarn feeding surface there are a first yarn threading hole 12, a second yarn threading hole 13 and a jutting yarn guiding member 14 on a lower end of the yarn feeding portion 11 relative to the hook 21.
- the jutting yarn guiding member 14 locates on the lower end of the yarn feeding portion 11 correspondingly and close to the hook 21.
- the second yarn threading hole 13 is located above the yarn guiding member 14.
- the first yarn threading hole 12 is located between the second yarn threading hole 13 and the yarn guiding member 14.
- the hook 21 is the common point of the first yarn threading hole 12, second yarn threading hole 13 and yarn guiding member 14.
- the common point and the yarn guiding member 14 and the first yarn threading hole 12 form a first included angle A
- the common point and the first yarn threading hole 12 and the second yarn threading hole 13 form a second included angle B.
- the second included angle B is preferably larger than or equal to the first included angle A.
- the first yarn feeding hole 12 may serve as the center point.
- the center of the second yarn threading hole 13 is located on a line vertical to the center point above the first yarn threading hole 12.
- the yarn threading holes 12 and 13 are coupled respectively with a porcelain eye 121 and 131 each is formed with a curved chamfered angle and is smooth, wearing-resistant and high temperature-resistant. Hence the threads 30 and 31 can pass through the yarn thread holes 12 and 13 smoothly.
- the three yarns 30, 31 and 32 are spaced from one another at desired intervals, and the porcelain eye 131 of the second yarn threading hole 13 is located at a desired elevation normal to the first yarn feeding surface 111, the yarns 30, 31 and 32 form elevation differences so that they are spaced from one another in three dimensions while entering the yarn feeder 10.
- the first yarn feeding surface 111 may further has an indented second yarn feeding surface 112 corresponding to the first yarn threading hole 12 to increase the elevation difference among the yarns 30, 31 and 32 and reduce the interference among them.
- Another way to separate the three yarns 30, 31 and 32, and generate the three dimensional interval is to increase the height of the porcelain eye 131 of the second yarn threading hole 13 and form the second yarn feeding surface 112 at a lower elevation, thereby the elevation of the first yarn threading hole 12 is lower than the second yarn threading hole 13.
- the yarn guiding member 14 is exposed outside the yarn feeding portion 11. Hence the third yarn 32 is easier to escape from the yarn guiding member 14.
- the yarn guiding means is pivotally coupled with an anchor rack 162.
- An adjusting hole is located on another side relative to the first yarn feeding surface 111 to engage with a fastening element 17 to fasten the anchor rack 162 to the adjusting hole 171.
- the third yarn 32 can smoothly pass through between the yarn guiding means 16 and the yarn feeder 10 without loosening off.
- the traveling path of the third yarn 32 can be directed through the yarn guiding means 16 to the yarn guiding member 14.
- the position of the yarn guiding means 16 may also be altered according to the required position of the third yarn 32. Referring to FIG.
- a jutting detent member 15 may be formed on a lower end of the yarn feeding portion 11 opposing the yarn guiding member 14 to confine the third yarn 32.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
Abstract
A yarn feeder for circular knitting machines that have a plurality of knitting needles includes a first threading hole (12), a second threading hole (13) and a jutting yarn guiding member (14) on a lower edge for feeding three yarns (30, 31, 32) corresponding to a knitting needle (20). The three yarns (30, 31, 32) enter a hook (21) of the knitting needle (20) through the first and second threading holes (12, 13) and the yarn guiding member (14). The hook (21) is a common point, forms a first included angle (A) with the yarn guiding member (14) and the first yarn threading hole (12), and forms a second included angle (B) with the first threading hole (12) and the second threading hole (13). The second included angle (B) is larger than or equal to the first included angle (A). Thus the three yarns (30, 31, 32) can be directed smoothly into the hook (21) of the knitting needle (20) without forming interference. Traveling of the three yarns (30, 31, 32) is smoother.
Description
- The present invention relates to a yarn feeder for circular knitting machines and particularly to a yarn feeder to aid feeding three yarns into a circular knitting machine for a plurality of knitting needles.
- With advance of technology, nowadays filaments and fibers may be made from many different sources. Different types of yarns are being developed to give people more comfortable clothing. These days, animal furs, nylon fibers and the like are widely used in clothing fabrics. Yarns made from plant fibers also are used to make fabrics through circular knitting machines. These fabrics also are widely used to make clothes for people. Knitting of fabrics through the circular knitting machines usually requires a yarn feeder to aid yarns to be moved to a yarn hook position so that knitting needles can pick up the yarns and form loops in the knitting process. However, the yarns are often attached with floss or prone to breaking. A poorly designed yarn feeder tends to accumulate the floss or produce broken yarns. This results in lower quality of the fabrics. Or yarn threading has to be done repeatedly and results in lower production speed.
- To remedy the aforesaid problems, R.O.C. patent publication
No. 394272 No. 529639 - To remedy the aforesaid shortcomings, R.O.C. patent publication
No. 491300 - Therefore the primary object of the present invention is to solve the aforesaid disadvantages. The invention provides a yarn feeder to feed three yarns for multiple knitting needles of a circular knitting machine. The yarn feeder has two yarn threading holes and a yarn guiding member corresponding to the threading positions of the tree yarns. Hence the three yarns can enter smoothly into the yarn feeder corresponding to the hook of the knitting needle to be combined into one thread without interference or entangling. The relative positions of the threading holes are changeable to increase the intervals of the three threads to achieve a steady yarn feeding.
- Another object of the invention is to reduce floss accumulation while the yarns pass through the yarn feeder, and reduce thermal deformation of the thread holes. Each of the thread threading holes is coupled with a porcelain eye which is smooth and heat-resistant. This enhances the smoothness and heat resistance of the yarn threading hole.
- Yet another object of the invention is to have the yarn guiding member exposed. And a detent member is provided on one end of the yarn feeder opposing another end where the yarn guiding member and the yarns are in contact. Hence in the event that the yarn is loosening off from the yarn guiding member, it is confined from escaping.
- Still another object of the invention is, asides from providing two dimensional intervals among the three yarns, to include the height of the porcelain eye, or lower the elevation of the yarn threading holes to form an elevation difference between them to increase the distance of the yarns entering the yarn feeder. Thus a three dimensional interval is formed among the three yarns to reduce the interference among them.
- The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.
-
- FIG. 1 is a perspective view of the present invention.
- FIG. 2 is an exploded view of the present invention.
- FIG. 3A is a schematic view of the invention is an assembled condition.
- FIG. 3B is a fragmentary enlarged view of the present invention.
- Please referring to FIG. 1, the invention includes a
yarn feeder 10 located on a circular knitting machine to thread threeyarns yarns corresponding knitting needle 20. Theknitting needle 20 has ahook 21 to combine the threeyarns - Referring to FIGS. 2 and 3A, the
yarn feeder 10 has an indentedyarn feeding portion 11 on one end opposing theknitting needle 20. Theyarn feeding portion 11 has a firstyarn feeding surface 111 on which the threeyarns yarn threading hole 12, a secondyarn threading hole 13 and a juttingyarn guiding member 14 on a lower end of theyarn feeding portion 11 relative to thehook 21. Through such a structure, thefirst yarn 30,second yarn 31 andthird yarn 32 are threaded and coupled. The juttingyarn guiding member 14 locates on the lower end of theyarn feeding portion 11 correspondingly and close to thehook 21. The secondyarn threading hole 13 is located above theyarn guiding member 14. The firstyarn threading hole 12 is located between the secondyarn threading hole 13 and theyarn guiding member 14. Thehook 21 is the common point of the firstyarn threading hole 12, secondyarn threading hole 13 andyarn guiding member 14. The common point and theyarn guiding member 14 and the firstyarn threading hole 12 form a first included angle A, the common point and the firstyarn threading hole 12 and the secondyarn threading hole 13 form a second included angle B. In order to prevent thethread yarns hook 21 and avoid generating static charge, the second included angle B is preferably larger than or equal to the first included angle A. Hence before the threeyarns yarn feeding surface 111 or thehook 21, they are paced by intervals without generating static charge. Therefore interference does not take place. According to a preferred embodiment, the firstyarn feeding hole 12 may serve as the center point. The center of the secondyarn threading hole 13 is located on a line vertical to the center point above the firstyarn threading hole 12. - Referring to FIGS. 3A and 3B, in order to prevent the first and second
yarn threading holes second yarns porcelain eye threads yarns porcelain eye 131 of the secondyarn threading hole 13 is located at a desired elevation normal to the firstyarn feeding surface 111, theyarns yarn feeder 10. Similarly, the firstyarn feeding surface 111 may further has an indented secondyarn feeding surface 112 corresponding to the firstyarn threading hole 12 to increase the elevation difference among theyarns yarns porcelain eye 131 of the secondyarn threading hole 13 and form the secondyarn feeding surface 112 at a lower elevation, thereby the elevation of the firstyarn threading hole 12 is lower than the secondyarn threading hole 13. - Referring to FIGS. 2 and 3B, the
yarn guiding member 14 is exposed outside theyarn feeding portion 11. Hence thethird yarn 32 is easier to escape from theyarn guiding member 14. To prevent this from happening, there is ananchor hole 163 on a desired location of theyarn feeder 10 corresponding to the firstyarn feeding surface 111 to couple with a thread guiding means 16 which has aconcave portion 161 to hold thethird yarn 32. The yarn guiding means is pivotally coupled with ananchor rack 162. An adjusting hole is located on another side relative to the firstyarn feeding surface 111 to engage with afastening element 17 to fasten theanchor rack 162 to the adjustinghole 171. When there is a need to thread thethird yarn 32 through the guidingmember 14 at different angles, unfasten thefastening element 17, and turn the thread guiding means 16 about theanchor hole 163 or normal to the firstyarn feeding surface 111 to make a desired adjustment. Therefore, thethird yarn 32 can smoothly pass through between the yarn guiding means 16 and theyarn feeder 10 without loosening off. Moreover, the traveling path of thethird yarn 32 can be directed through the yarn guiding means 16 to theyarn guiding member 14. The position of the yarn guiding means 16 may also be altered according to the required position of thethird yarn 32. Referring to FIG. 3B, to prevent thethird yarn 32 from escaping after passing through the yarn guiding means 16 and resulting in loosening off, a juttingdetent member 15 may be formed on a lower end of theyarn feeding portion 11 opposing theyarn guiding member 14 to confine thethird yarn 32. - While the preferred embodiments of the invention have been set forth for the purpose of disclosure, modifications of the disclosed embodiments of the invention as well as other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.
Claims (9)
- A yarn feeder installed on a circular knitting machine which has a plurality of knitting needles, comprising an indented yarn feeding portion (11) on a lower end of the yarn feeder (10), a first yarn threading hole (12) and a second yarn threading hole (13) on the yarn feeding portion (11), and a jutting yarn guiding member (14) located on one end of a lower edge of the yarn feeding portion (11) such that a first yarn (30), a second yarn (31) and a third yarn (32) enter from a first yarn feeding surface (111) formed on one side of the yarn feeding portion (11), and thread through to leave via another side thereof, and are directed to a hook (21) of a knitting needle (20) corresponding to the yarn feeder (10),
wherein in the hook (21) is a common point of the first yarn (30), the second yarn (31) and the third yarn (32), and forms a first included angle (A) with the yarn guiding member (14) and the first yarn threading hole (12), and forms a second included angle (B) with the first yarn threading hole (12) and the second yarn threading hole (13), the second included angle (B) being larger than or equal to the first included angle (A). - The yarn feeder of claim 1, wherein the first yarn threading hole (12) and the second yarn threading hole (13) are coupled respectively with a porcelain eye (121, 131).
- The yarn feeder of claim 2, wherein the porcelain eye (131) on the second yarn threading hole (13) is located at an elevation extended from the first yarn feeding surface (111).
- The yarn feeder of any of the preceding claims, wherein the first yarn threading hole (12) is located on a second yarn feeding surface (112) which is lower than the first yarn feeding surface (111).
- The yarn feeder of any of the preceding claims, wherein the first yarn threading hole (12) is located on a second yarn feeding surface (112) which is lower than the first yarn feeding surface (111).
- The yarn feeder of any of the preceding claims, further including a yarn guiding means (16) to aid threading of the third yarn (32), an anchor rack (162) pivotally coupled on the yarn guiding means (16), and an anchor hole (163) to hold the anchor rack (162).
- The yarn feeder of any of the preceding claims, further having an adjusting hole (171) on another side relative to the anchor hole (163) to engage with a fastening element (17) to fasten the anchor rack (162) of the yarn guiding means (16).
- The yarn feeder of claim 6 or 7, wherein the yarn guiding means (16) has a concave portion (161) to hold the third yarn (32).
- The yarn feeder of any of the preceding claims, wherein the yarn feeding portion (11) has a jutting detent member (15) on another end of the lower edge opposing the yarn guiding member (14).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05108612A EP1764433A1 (en) | 2005-09-19 | 2005-09-19 | Yarn feeder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05108612A EP1764433A1 (en) | 2005-09-19 | 2005-09-19 | Yarn feeder |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1764433A1 true EP1764433A1 (en) | 2007-03-21 |
Family
ID=36097243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05108612A Withdrawn EP1764433A1 (en) | 2005-09-19 | 2005-09-19 | Yarn feeder |
Country Status (1)
Country | Link |
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EP (1) | EP1764433A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102556752A (en) * | 2011-11-28 | 2012-07-11 | 淄博中材庞贝捷金晶玻纤有限公司 | Yarn ball detecting device and yarn ball detecting method during yarn winding process |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3757537A (en) * | 1971-02-23 | 1973-09-11 | O York | Knitting machine |
FR2774401A1 (en) * | 1998-02-03 | 1999-08-06 | Teixits De Punt Campmany Sa | THREAD GUIDE FOR VANIZED THREE-WIRE KNITTING ON CIRCULAR MATERIAL |
GB2379453A (en) * | 2001-08-20 | 2003-03-12 | Pai Lung Machinery Mill Co Ltd | Yarn feeder for circular knitting machine |
-
2005
- 2005-09-19 EP EP05108612A patent/EP1764433A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3757537A (en) * | 1971-02-23 | 1973-09-11 | O York | Knitting machine |
FR2774401A1 (en) * | 1998-02-03 | 1999-08-06 | Teixits De Punt Campmany Sa | THREAD GUIDE FOR VANIZED THREE-WIRE KNITTING ON CIRCULAR MATERIAL |
GB2379453A (en) * | 2001-08-20 | 2003-03-12 | Pai Lung Machinery Mill Co Ltd | Yarn feeder for circular knitting machine |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102556752A (en) * | 2011-11-28 | 2012-07-11 | 淄博中材庞贝捷金晶玻纤有限公司 | Yarn ball detecting device and yarn ball detecting method during yarn winding process |
CN102556752B (en) * | 2011-11-28 | 2014-11-05 | 淄博中材庞贝捷金晶玻纤有限公司 | Yarn ball detecting device and yarn ball detecting method during yarn winding process |
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