CA1127935A - Heddle - Google Patents

Heddle

Info

Publication number
CA1127935A
CA1127935A CA334,982A CA334982A CA1127935A CA 1127935 A CA1127935 A CA 1127935A CA 334982 A CA334982 A CA 334982A CA 1127935 A CA1127935 A CA 1127935A
Authority
CA
Canada
Prior art keywords
eye
heddle
plastics material
thread guiding
cross
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
Application number
CA334,982A
Other languages
French (fr)
Inventor
Paul Ramseier
Hans Burkhalter
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.)
Braecker AG
Original Assignee
Braecker AG
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 Braecker AG filed Critical Braecker AG
Application granted granted Critical
Publication of CA1127935A publication Critical patent/CA1127935A/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D03WEAVING
    • D03CSHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C9/00Healds; Heald frames
    • D03C9/02Healds
    • D03C9/024Eyelets
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03CSHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C9/00Healds; Heald frames
    • D03C9/02Healds

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Woven Fabrics (AREA)

Abstract

ABSTRACT OF THE DISCLOSURE
A heddle molded from a plastics material is provided with an eye (10) embedded in the heddle body. The eye (10) can be made from hardened or stainless steel. The embedding is effected by injecting the plastics material around the thread eye.
The thread guiding eye (10) may have a generally meniscal cross-sectional configuration. The edges of the shape are embedded in the plastics material in order to produce a smooth transfer surface, free of voids and sharp edges. The elongated portions (22,24) and/or the region (16) of the thread guiding eye (10) are of at least approximately oval cross-sectional configuration. The heddle of this type combines the advantages of a good wear resistance of the eye portion of a heddle made from metallic material with the advantage of the low weight of a non-metallic heddle.

Description

A HEDDLE

The present invention relates to a heddle of the type having a thread guiding eye inserted in the body of same.
Heddles in looms serve the purpose of raising or lower-ing warp threads used in the weaving of a fa~ric. It is known to produce heddles from a yarn, from metal and from plastics material. In the yarn heddles, the thread guiding eye is produced by an appropriate knotting technique of the yarn per se or, alternatively, a thread eye from metal can be twisted or knitted onto the yarn. In metallic heddles, the thread guiding eye is formed either by piercing of a double wire soldered together, by stamping an originally round wire rolled to a generally flat shape, or from a rolled strip of a material, depending on what kind of material is used in the production of the heddle. Alternatively, a thread guiding eye, also referred to as Maillon, is soldered into a recess in I:he split heddle. Finally, the known heddles made from plastics material are stamped to produce the thread guiding eye.
The thread guiding eye is of considerable significance as it is subjected to wear by the warp thread passing there-through, while it must not damage the warp thread by friction.
An inserted thread guiding eye made of metal is most suitable for such purpose as it enables, during its manufacture, the necessary fine machining such as polishing,while simultaneously making it possible to produce the eye in a suitably rounded shape. Furthermore, such type of thread guiding eye can be hardened by case hardening. However, the disadvantage of this type of the thread guiding eye is in the expense of twisting or knotting of the eye to a yarn heddle. The expense renders yarn heddles too costly to produce. Furthermore heddles ~' ~12793S

made from metal are relatively heavy so that the thread speed or the number or weft rounds is limited due to the shaft weight.
Accordingly, it is an object of the present invention to provide a heddle which has a wear resistant thread guiding eye, which can be produced at relatively low costs and at the same time enables a high number of weft rounds.
In accordance with one aspect of the present invention, a heddle is provided of the type made from plastics material and having a warp thread guiding eye embedded in the plastics material said eye being made of a material such as glass or metal, which is harder than the said plastics material, said eye being surrounded by said plastics material about an outer periphery and at axial ends thereof,~whereby the overall axial length of the eye is less than the thickness of the heddle in the immediate vicinity of the eye~ as measured axially of the eye. Preferably, the eye is of a generally meniscal cross-sectional configuration defining an inner convexly rounded surface and including an axially outermost annular edge portion at each axial end thereof, said axially outermost edges forming anchoring sections whereby the eye is anchored in the heddle, and the inner convexly rounded surface is flush with the adjacent part of the plastics material.
The heddle of this type features generally the same advantages as a metallic heddle with an inserted thread guiding eye lining, however, it is of a considerably reduced weight and also is considerably less noisy as its end slots brought into contact with metal shafts of a loom are formed by a plastics material. Moreover, it is corrosion resistant.
30 ~ In another aspect, the present invention provides a method for the production of a heddle of the type referred to above, the method including the steps of inserting the th~ead guiding eye into an injection mold for injection molding the entire heddle such that the outer periphery and a portion of each axial end thereof form a part of the interior of the cavity of said mold, which part i~ then coated with said plastics material simultaneously with injection molding of said heddle.

, , .~

11'~7935 The subject of the invention will be further explained with reference to the accompanying drawing, by way of an embodiment of the invention.
In the drawing:
Figure 1 is a heddle of the type having closed end slots, in a front view, Figure 2 is a cross-section along the line II - II
of Fig. 1, Figure 3 is a cross-section along the line III - III
of Fig. 1, and Figure 4 is a cross-section of an injection mold for the production of the heddle of Figure 1.
The heddle shown in Figure 1 is provided, in a central portion 16 thereof, with an inserted thread guiding eye 10 and, at its ends, with enclosed end slots 12 or 14. The parts of the heddle disposed between the central portion 16 surrounding the thread guiding eye 10 and the widened end portions 18 or 20, surrounding the end slots 12, 14, are referred to as longitudinal sections 22, 24 and are broken away in the representation shown in the drawing. The thread guiding eye 16 provides an elongated passage 26. Instead of the enclosed end slots 12, 14, the heddle can also be provided with open-ended slots, which are particularly advantageous in the art of shaft weaving.
It is apparent from Figure 2 that the cross-sectional configuration of the longitudinal section 22 as well as that of the longitudinal section 24 is generally oval.
Figure 3 shows the generally meniscal cross-sectional configuration of the thread guiding eye 10. The thread guiding eye is embedded in the plastics material forming the central portion 16~ The thickness of the central portion 16 decreases in the direction towards its outer edges 28 or 30.
Preferably, the heddle made from a plastics material is produced by injection molding such that the thread guiding eye 10 made from metal or glass is surrounded by the plastics material during the molding operation. As the metal for use in the production of the eye 10, steel suitable for case hardening, or stainless steel can be used. Figure 4 shows a cross-section of an injection mold with a thread guiding eye 10 inserted therein. The mold consists of a lower half 32 and an upper half 34. Operatively associated with the lower half 32 is a centering pin 36', while the upper half of the mold 34 is provided with a centering pin 36, the two being arranged to engage the thread guiding eye 10 and to center same as shown.
The bevelled free end of each of the centering pins 36, 36' corresponds in size to the interior of the thread guiding eye 10. An opening 38 in the region of the thread guiding eye 10 serves the purpose of injecting the plastics material. It is surprising that despite the provision of merely a single in-jection point and the fact that the material flow at the end regions 18, 20 of the heddle takes place at a considerably reduced temperature, a good inner bond of the material is established behind the end slots, since the material for the production of the heddle can be introduced at a low viscosity by a special hot nozzle device and can reach the end regions of the heddle without having to overcome virtuallv any obstacles.
During the molding, the edges of the thread guiding eye 10, which is of a generally meniscal cross-sectional configuration, are surrounded by the plastics material in order to produce a smooth transfer zone between the two materials.
Contrary to a heddle produced from metal, the heddle made from a plastics material possesses the feature of elasticity in its longitudinal direction so that the transfer from one position to the other of the heddle in a loom during the weaving is smoother which results in a less severe wear of the warp thread.
The plastic heddle of this kind is particularly suitable for use in elastic counter-pulls present in loo~sfor Jacquard weaving.

~27935 The generally oval cross-sectional configuration of the heddle in proximity to the warp secures a virtually friction-free passage of the adjacent webs.

Claims (6)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A heddle of the type made from plastics material and having a warp thread guiding eye embedded in the plastics material said eye being made of a material such as glass or metal, which is harder than the said plastics material, said eye being surrounded by said plastics material about an outer periphery and at axial ends thereof, whereby the overall axial length of the eye is less than the thickness of the heddle in the immediate vicinity of the eye, as measured axially of the eye.
2. A heddle as claimed in claim 1, wherein said eye is of a generally meniscal cross-sectional configuration defining an inner convexly rounded surface and including an axially outermost annular edge portion at each axial end thereof, said axially outermost edges forming anchoring sections whereby the eye is anchored in the heddle and the inner, convexly rounded surface is flush with the adjacent part of the plastics material.
3. A heddle as claimed in claim 1, wherein the eye is made of case hardened steel or of stainless steel.
4. A heddle as claimed in claim 1, wherein the cross-sectional configuration of a middle section of said heddle at said eye is generally oval, the major axis of the oval cross-section extending transversely of elongation of the heddle and being generally coplanar with a plane disposed radially with respect to said eye.
5. A heddle as claimed in claim 4, wherein that section of the beddle which coincides with the eye is enlarged in size and is interrupted by the eye.
6. A method for the production of a heddle of the type made from plastics material and having a warp thread guiding eye embedded in the plastics material said eye being made of a material such as glass or metal, which is harder than the said plastics material, said eye being surrounded by said plastics material about an outer periphery and at axial ends thereof, whereby the overall axial length of the eye is less than the thickness of the heddle in the immediate vicinity of the eye as measured axially of the eye, said method including the steps of inserting the thread guiding eye into an injection mold for injection molding the entire heddle such that the outer periphery and a portion of each axial end thereof form a part of the interior of the cavity of said mold which part is then coated with said plastics material simultaneously with injection molding of said heddle.
CA334,982A 1978-09-26 1979-09-04 Heddle Expired CA1127935A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH10003/78-5 1978-09-26
CH1000378A CH631755A5 (en) 1978-09-26 1978-09-26 FABRIC.

Publications (1)

Publication Number Publication Date
CA1127935A true CA1127935A (en) 1982-07-20

Family

ID=4358320

Family Applications (1)

Application Number Title Priority Date Filing Date
CA334,982A Expired CA1127935A (en) 1978-09-26 1979-09-04 Heddle

Country Status (15)

Country Link
JP (1) JPS6317934B2 (en)
KR (1) KR830001440A (en)
BE (1) BE878983A (en)
CA (1) CA1127935A (en)
CH (1) CH631755A5 (en)
DD (1) DD146064A5 (en)
DE (2) DE2953141C1 (en)
ES (2) ES484426A1 (en)
FR (1) FR2437458A1 (en)
GB (1) GB2043123B (en)
IN (1) IN151739B (en)
IT (1) IT1123560B (en)
PL (1) PL121743B1 (en)
SU (1) SU1050576A3 (en)
WO (1) WO1980000719A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7017620B2 (en) 2003-06-17 2006-03-28 Groz-Beckert Kg Heddle

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5052446A (en) * 1989-06-12 1991-10-01 Sulzer Brothers Limited Thermoplastic heddle with braided fiber tube reinforcement
US5494080A (en) * 1991-09-10 1996-02-27 Nippon Filcon Co., Ltd. Arcuate heddle and shedding system employing an arcuate heddle
JPH0571036A (en) * 1991-09-10 1993-03-23 Nippon Filcon Co Ltd Device for shed using heald having one supported end and method for weaving and joining using the same device
DE4336362C1 (en) * 1993-10-25 1994-10-13 Grob & Co Ag Thread eyelet for a heald
CH692587A5 (en) * 1997-09-16 2002-08-15 Braecker Ag Rod-shaped thread-guiding element for textile machines, in particular heddle, and methods for producing the same.
FR2776676B1 (en) 1998-03-31 2000-05-26 Staubli Lyon METHOD FOR MANUFACTURING A SMOOTH, SMOOTH AND CROWD FORMING DEVICE FOR WEAVING MATERIAL
EP1908863B1 (en) 2006-10-06 2009-04-08 Groz-Beckert KG Heddle for Jacquard loom
BE1017482A3 (en) * 2007-03-14 2008-10-07 Darvan Invest Nv METHOD AND DEVICE FOR DEFORMING THE CROSS-SECTION OF ONE OR MORE LONG SECTION OF A LONG-TERM OBJECT.
JP5188944B2 (en) 2008-12-08 2013-04-24 株式会社豊田自動織機 Frame
JP5217992B2 (en) 2008-12-10 2013-06-19 株式会社豊田自動織機 Warp cutting detection device in loom
EP2584078B1 (en) * 2011-10-21 2015-08-26 Groz-Beckert KG Heald with yarn-friendly yarn eyelet
DE102016002561B4 (en) 2015-10-19 2018-10-31 Steintex Walter vom Stein KG Method for producing healds and product produced therewith

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE442103A (en) *
US1413949A (en) * 1921-09-08 1922-04-25 Paul A Wagner Heddle for looms
FR608426A (en) * 1925-09-16 1926-07-27 Process for the production of eyelets for weaving heddles of steel wire and eyelet produced by this process
DE852079C (en) * 1942-12-20 1952-10-13 Felten & Guilleaume Carlswerk Heddle
US3634572A (en) * 1968-12-23 1972-01-11 Dayco Corp Transmission belt and apparatus for and method of making same
CH573993A5 (en) * 1974-04-09 1976-03-31 Staeubli Ag

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7017620B2 (en) 2003-06-17 2006-03-28 Groz-Beckert Kg Heddle

Also Published As

Publication number Publication date
CH631755A5 (en) 1982-08-31
IT7925531A0 (en) 1979-09-07
IT1123560B (en) 1986-04-30
JPS6317934B2 (en) 1988-04-15
GB2043123A (en) 1980-10-01
IN151739B (en) 1983-07-16
KR830001440A (en) 1983-04-30
ES484426A1 (en) 1980-10-01
DE2953141C1 (en) 1988-05-19
DE2953141D2 (en) 1980-11-20
WO1980000719A1 (en) 1980-04-17
FR2437458A1 (en) 1980-04-25
PL218475A1 (en) 1980-06-02
BE878983A (en) 1980-01-16
FR2437458B1 (en) 1984-06-29
SU1050576A3 (en) 1983-10-23
ES251105U (en) 1980-09-16
DD146064A5 (en) 1981-01-21
PL121743B1 (en) 1982-05-31
GB2043123B (en) 1983-01-26
JPS55500665A (en) 1980-09-18
ES251105Y (en) 1981-03-16

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