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US3714683A - Slide-fastener stringer with stitched-on coupling element - Google Patents

Slide-fastener stringer with stitched-on coupling element Download PDF

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Publication number
US3714683A
US3714683A US00082324A US3714683DA US3714683A US 3714683 A US3714683 A US 3714683A US 00082324 A US00082324 A US 00082324A US 3714683D A US3714683D A US 3714683DA US 3714683 A US3714683 A US 3714683A
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United States
Prior art keywords
tapes
pair
edge
elements
wales
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Expired - Lifetime
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US00082324A
Inventor
A Frohlich
M Cappel
E Strubiger
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Opti Holding AG
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Opti Holding AG
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    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/24—Details
    • A44B19/34—Stringer tapes; Flaps secured to stringers for covering the interlocking members
    • A44B19/343—Knitted stringer tapes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/25—Zipper or required component thereof
    • Y10T24/2518—Zipper or required component thereof having coiled or bent continuous wire interlocking surface
    • Y10T24/2521—Zipper or required component thereof having coiled or bent continuous wire interlocking surface with stringer tape having specific weave or knit pattern

Definitions

  • the present invention relates to a slide-fastener stringer comprising a pair of parallel support tapes carrying on their confronting edges a pair of interengageable coupling elements.
  • Another object of this invention is to provide an improved method of fastening a coupling element to a support tape.
  • a slide-fastener stringer comprising a pair of warp-knit support tapes having longitudinally extending wales separated by valleys on which are sewn a pair of interengageable coupling elements with the rows of stitching engaging over the coupling elements and passing through the tapes only in the valley adjacent an edge band thereof, which band is formed by one or two edge wales. Owing to the ladderlike way in which the weft filaments cross the valleys in a warp knit, the stitching cannot slip to any noticeable extent.
  • the stitching tends to rigidify the edges of the tapes so that the normally inelastic warp knit is made even stiffer, while the reinforced edge bands impart a regular thickness to the tapes and make displacement of the slider very easy.
  • the stitching is passed through the valley which is located two wales inwardly from the tape edge, so that in this case the edge band is formed by a'pair of wales.
  • a slidefastener stringer comprising a pair of elongated warpknit support tapes having confronting longitudinal edges, each tape constituted of a plurality of transversely offset longitudinally extending warp chains and laid-in weft filaments transversely connecting the chains to form a warp-knit foundation, and respective elongated continuous coupling elements interconnectable upon movement of a slider therealong and lying along the confronting edges and secured thereto.
  • the weft filament is laid in a 4- 4/0-0 pattern and the warp filament is chained in a O-l/l-O pattern, or a 2-0/0--?. pattern, or a pair of such warp filaments are provided, one chained in a 0-1 1-0 pattern and the other in a 2-0/0-2 pattern.
  • the tapes of this stringer are formed with stitching holes for attachment of the coupling elements and its weft filaments are voluminous textured (bulk) yarn.
  • That application alsodiscloses a method of making a slide-fastener stringer comprising the steps of forming a plurality of transversely offset longitudinally extending warp chains, laying into these chains a plurality of weft filaments to form a pair of warp-knit foundation tapes, securing an elongated coupling element to the confronting edges of the tapes, and thermally fixing the tapes.
  • a slide-fastener stringer comprising a pair of interengageable coupling elements each having a multiplicity of turns, a pair of warp-knit support tapes having Wale-forming warp filaments and course-forming weft filaments, and a succession of stitches passing between the turns and through the tapes and securing the elements to the confronting edges of the tapes, the stitches having a stitch length greater than the course width.
  • These stitches pass through the tapes between the wales, and the stitch length is an integral multiple of the course width, e.g., equal to twice the course width.
  • the weft filaments are laid in a 4-4/0-0 pattern and at least some warp filaments are chained in a O-l/l-O pattern while other warp filaments are chained in a 2-0/0-2 pattern.
  • the warp and weft filaments are of greater bulk adjacent the edges than remote therefrom.
  • the wales are on one face of the tapes, the other face being smooth and engaging the coupling elements.
  • the weft filaments are spanned across at least three wales and the tapes are also knit with second warp filaments chained in opposition to the first warp filaments while at least one of the filaments which comes to the edge of the tapes is reinforced.
  • That application also describes a method as above wherein there is the additional step of tensioning the connecting filaments more tightly than the warp and weft filaments to form a succession of openings in the tapes between the wales adjacent the confronting edges, whereby breaking the connecting filament separates the tapes and substantially closes the openings.
  • the elements are attached by sewing with stitches passing through the openings or the elements are attached to the tapes by passing their coupling heads through the openings.
  • the connecting filament may be spanned over only two courses so that the openings are formed adjacent the edge wales of the tapes.
  • Four such tapes can be knit interconnected by three such connecting filaments, so that the method further comprises the step of cutting the central filament prior to attachment of two pairs of interengageable coupling elements to the two joined pairs of tapes thus formed.
  • FIG. 1 a pair of warp-knit tapes 1 I on which are mounted coupling elements 3 fastened by stitchingZ passing through a filler cord 4.
  • Each of the elements 3 is a nylon coil formed with coupling heads 3a (see FIG. 3).
  • the tapes l have on theirundersides wales 5 separated by valleys 6 and at their confronting edges thickened edge bands 1 which are formed during knitting of the'tape by feeding a doubled or bulk yarn to the guide responsible for the edge wale.
  • the stitching 2 lies in the valley 6' directly adjacent the band 7 with the elements 3 lying on the smooth side of stringer, in order to secure the elements 3 far enough back from the tape edges, the stitching 2 must lie in the valley 6 which is two valleys in from the tape edge.
  • distance A equal to the width of four wales and two valleys.
  • FIG. 3 shows how the warp chains forming the wales are constituted by warp filaments 8 and 9, chained in a l-0/0-l pattern, while laid into them are weft filaments 10 in a 4--4/00 pattern.
  • the code for these patterns is discussed in the book Advanced Knitting Principles edited by Charles Reichman (National Knitted Outerwear Association, 1964'), chapters 26 and 30.
  • FIG. 3 There is also shown in FIG. 3 a connecting filament 11 which is laid in with a 22/0() pattern between the two reinforced warp chains formed by the filaments 8.
  • This filament I1 is tensioned during knitting of the two tapes 1 so that the, edge wale or wales are pulled away from the rest of the tapes, thereby forming large valleys which make it easy to sew on the elements 3.
  • a slide-fastener stringer comprising:
  • a pair of paralle warp-knit support tapes having longitudinally extending parallel wales including at least one wale defining a band along the edge of said tape separated from the rest of said wales by a valley;
  • connecting filament extending between the edge bands of said pair of tapes and tensioned to broaden said valleys, thereby facilitating stitching of said elements to said tapes.
  • edge band is formed by a single wale constituted largely from a reinforced warp filament.

Landscapes

  • Slide Fasteners (AREA)
  • Knitting Of Fabric (AREA)
  • Sheet Holders (AREA)

Abstract

A slide-fastener stringer has a pair of warp-knit support tapes with longitudinally running wales separated by valleys. A coupling element is stitched to each tape adjacent the edge thereof with rows of stitching passing through the tape only in the valley adjacent one of the edge wales thereof. In the case of a very fine knit, the stitching lies in the second valley in from the tape edge. The edge wale is reinforced for best holding action by knitting it with a relatively dense or bulky yarn.

Description

United States Patent 11 1 Friihlich et al.
[ 1 SLlDE-FASTENER STRINGER WITH STlTCHED-ON COUPLING ELEMENT [75] Inventors: Alfons Friihllch; Marie-Luise Cappel, both of Essen; Ernst Striibiger, Giessen, all of Germany [73] Assignee: Opti-Holding AG, Glarus/Schweiz,
Germany 22 Filed: Oct. 20, 1970 21 Appl.No.: 82,324
[30] Foreign Application Priority Data April 4, 1972 Germany ..P-20 16 146.0
[52] US. Cl. ..24/205.l C, 24/205.l6 C, 112/265, 66/195 [51 Int. Cl. ..A44b 19/40 [58] Field of Search ...24/205. 16, 205.16 C, 205.1 C, 24/205.l3 C, 205.1; 112/265, 205, 262, 25;
[56] References Cited UNITED STATES PATENTS Weinberg; ..24 205. 1 6
14 1 Feb. 6, 1973 2.433.279 12 1947 101111.111 ..66/ 1 9s 2.90.1775 9 1959 1011115 ..24/2115.1o 2.959.337 11/1901) Jcllc ..2/275 3,149,388 9 1904 Wilcken ..24 205.1 c
FOREIGN PATENTS OR APPLICATIONS 713,257 7/1965 Canada ..24/205.13 C
Primary Examiner-Bernard A. Gelak Attorney-Karl F. Ross 5 7 ABSTRACT 4 Claims, 3 Drawing Figures SLIDE-FASTENER STRINGER WITH STITCIIED- ON COUPLING ELEMENT FIELD OF THE INVENTION The present invention relates to a slide-fastener stringer comprising a pair of parallel support tapes carrying on their confronting edges a pair of interengageable coupling elements.
BACKGROUND OF THE INVENTION :OBJECTS OF THE INVENTION It is an object of the present invention to provide an improved slide-fastener stringer.
Another object of this invention is to provide an improved method of fastening a coupling element to a support tape.
SUMMARY OF THE INVENTION The above objects are attained, according to the present invention, by a slide-fastener stringer comprising a pair of warp-knit support tapes having longitudinally extending wales separated by valleys on which are sewn a pair of interengageable coupling elements with the rows of stitching engaging over the coupling elements and passing through the tapes only in the valley adjacent an edge band thereof, which band is formed by one or two edge wales. Owing to the ladderlike way in which the weft filaments cross the valleys in a warp knit, the stitching cannot slip to any noticeable extent. At the same time the stitching tends to rigidify the edges of the tapes so that the normally inelastic warp knit is made even stiffer, while the reinforced edge bands impart a regular thickness to the tapes and make displacement of the slider very easy. In the case of fine knits, the stitching is passed through the valley which is located two wales inwardly from the tape edge, so that in this case the edge band is formed by a'pair of wales.
In all cases the edges of the tapes abut with the fastener closed in the finished product so that a very stable closure is obtained. The stitching described above holds the coupling element on the tape in a very secure manner.
In our concurrently filed and commonly assigned application Ser. No. 82,327 there is disclosed a slidefastener stringer comprising a pair of elongated warpknit support tapes having confronting longitudinal edges, each tape constituted of a plurality of transversely offset longitudinally extending warp chains and laid-in weft filaments transversely connecting the chains to form a warp-knit foundation, and respective elongated continuous coupling elements interconnectable upon movement of a slider therealong and lying along the confronting edges and secured thereto.
In such a stringer the weft filament is laid in a 4- 4/0-0 pattern and the warp filament is chained in a O-l/l-O pattern, or a 2-0/0--?. pattern, or a pair of such warp filaments are provided, one chained in a 0-1 1-0 pattern and the other in a 2-0/0-2 pattern.
The tapes of this stringer are formed with stitching holes for attachment of the coupling elements and its weft filaments are voluminous textured (bulk) yarn.
That application alsodiscloses a method of making a slide-fastener stringer comprising the steps of forming a plurality of transversely offset longitudinally extending warp chains, laying into these chains a plurality of weft filaments to form a pair of warp-knit foundation tapes, securing an elongated coupling element to the confronting edges of the tapes, and thermally fixing the tapes.
Our commonly filed and assigned application Ser. No. 82,326 discloses a slide-fastener stringer comprising a pair of interengageable coupling elements each having a multiplicity of turns, a pair of warp-knit support tapes having Wale-forming warp filaments and course-forming weft filaments, and a succession of stitches passing between the turns and through the tapes and securing the elements to the confronting edges of the tapes, the stitches having a stitch length greater than the course width. These stitches pass through the tapes between the wales, and the stitch length is an integral multiple of the course width, e.g., equal to twice the course width. The weft filaments are laid in a 4-4/0-0 pattern and at least some warp filaments are chained in a O-l/l-O pattern while other warp filaments are chained in a 2-0/0-2 pattern. The warp and weft filaments are of greater bulk adjacent the edges than remote therefrom. The wales are on one face of the tapes, the other face being smooth and engaging the coupling elements.
Our commonly filed and assigned application Ser. No. 82,325 now US. Pat. No. 3,685,474, discloses a method of making a slide-fastener stringer comprising the steps of simultaneously forming a pair of parallel fabric tapes and joining same together at their confronting edges by at least one connecting filament, thereafter simultaneously attaching one of a pair of interengageable coupling elements to each of the confronting edges, and breaking the connecting filament to separate the tapes. These tapes are warp knit by forming a plurality of longitudinally extending Wale-forming warp chains from a plurality of warp filaments and laying into the chains a plurality of course-forming weft filaments. The weft filaments are spanned across at least three wales and the tapes are also knit with second warp filaments chained in opposition to the first warp filaments while at least one of the filaments which comes to the edge of the tapes is reinforced. That application also describes a method as above wherein there is the additional step of tensioning the connecting filaments more tightly than the warp and weft filaments to form a succession of openings in the tapes between the wales adjacent the confronting edges, whereby breaking the connecting filament separates the tapes and substantially closes the openings. The elements are attached by sewing with stitches passing through the openings or the elements are attached to the tapes by passing their coupling heads through the openings. The connecting filament may be spanned over only two courses so that the openings are formed adjacent the edge wales of the tapes. Four such tapes can be knit interconnected by three such connecting filaments, so that the method further comprises the step of cutting the central filament prior to attachment of two pairs of interengageable coupling elements to the two joined pairs of tapes thus formed.
DESCRIPTION OF THE DRAWING SPECIFIC DESCRIPTION There is shown in FIG. 1 a pair of warp-knit tapes 1 I on which are mounted coupling elements 3 fastened by stitchingZ passing through a filler cord 4. Each of the elements 3 is a nylon coil formed with coupling heads 3a (see FIG. 3). The tapes lhave on theirundersides wales 5 separated by valleys 6 and at their confronting edges thickened edge bands 1 which are formed during knitting of the'tape by feeding a doubled or bulk yarn to the guide responsible for the edge wale. The stitching 2 lies in the valley 6' directly adjacent the band 7 with the elements 3 lying on the smooth side of stringer, in order to secure the elements 3 far enough back from the tape edges, the stitching 2 must lie in the valley 6 which is two valleys in from the tape edge.
Thus, the two rows of stitching 2 are separated by a.
distance A equal to the width of four wales and two valleys.
FIG. 3 shows how the warp chains forming the wales are constituted by warp filaments 8 and 9, chained in a l-0/0-l pattern, while laid into them are weft filaments 10 in a 4--4/00 pattern. The code for these patterns is discussed in the book Advanced Knitting Principles edited by Charles Reichman (National Knitted Outerwear Association, 1964'), chapters 26 and 30.
There is also shown in FIG. 3 a connecting filament 11 which is laid in with a 22/0() pattern between the two reinforced warp chains formed by the filaments 8. This filament I1 is tensioned during knitting of the two tapes 1 so that the, edge wale or wales are pulled away from the rest of the tapes, thereby forming large valleys which make it easy to sew on the elements 3.
After attachment of these elements 3 the filament 11 is broken and the large valleys contract around the stitching.
We claim:
1. A slide-fastener stringer comprising:
a pair of interengageablecoupling elements;
a pair of paralle warp-knit support tapes having longitudinally extending parallel wales including at least one wale defining a band along the edge of said tape separated from the rest of said wales by a valley;
respective rows of stitching each engaging over one of said elements and passing through the respective one of said tapes only in its said valley for securing said elements to said tapes; and
connecting filament extending between the edge bands of said pair of tapes and tensioned to broaden said valleys, thereby facilitating stitching of said elements to said tapes.
2. The'stringer defined in claim 1 wherein the edge band is formed by a single wale constituted largely from a reinforced warp filament.
3. The stringer defined in claim 1 wherein the edge band is formed by a pair of wales.
4. The stringer defined in claim 1, further comprising a smooth face on each of said of said tapes, each of said elements being attached to a respective smooth face.

Claims (4)

1. A slide-fastener stringer comprising: a pair of interengageable coupling elements; a pair of parallel warp-knit support tapes having longitudinally extending parallel wales including at least one wale defining a band along the edge of said tape separated from the rest of said wales by a valley; respective rows of stitching each engaging over one of said elements and passing through the respective one of said tapes only in its said valley for securing said elements to said tapes; and connecting filament extending between the edge bands of said pair of tapes and tensioned to broaden said valleys, thereby facilitating stitching of said elements to said tapes.
1. A slide-fastener stringer comprising: a pair of interengageable coupling elements; a pair of parallel warp-knit support tapes having longitudinally extending parallel wales including at least one wale defining a band along the edge of said tape separated from the rest of said wales by a valley; respective rows of stitching each engaging over one of said elements and passing through the respective one of said tapes only in its said valley for securing said elements to said tapes; and connecting filament extending between the edge bands of said pair of tapes and tensioned to broaden said valleys, thereby facilitating stitching of said elements to said tapes.
2. The stringer defined in claim 1 wherein the edge band is formed by a single wale constituted largely from a reinforced warp filament.
3. The stringer defined in claim 1 wherein the edge band is formed by a pair of wales.
US00082324A 1970-04-04 1970-10-20 Slide-fastener stringer with stitched-on coupling element Expired - Lifetime US3714683A (en)

Applications Claiming Priority (1)

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DE2016146A DE2016146C3 (en) 1970-04-04 1970-04-04 Zipper with knitted straps

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JP (2) JPS5033466B1 (en)
DE (1) DE2016146C3 (en)
ES (1) ES189366Y (en)
FR (1) FR2092198A5 (en)
GB (1) GB1299918A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848556A (en) * 1970-12-04 1974-11-19 Yoshida Kogyo Kk Method for producing a sliding clasp fastener
US3849842A (en) * 1971-08-18 1974-11-26 Yoshida Kogyo Kk Slide fasteners
US3874036A (en) * 1971-08-20 1975-04-01 Yoshida Kogyo Kk Sliding clasp fasteners
US3881326A (en) * 1972-03-01 1975-05-06 Fontanille & Fils Elastelle Device for and method of making a knitted band having a spiral zipper incorporated therein
US3922760A (en) * 1971-12-21 1975-12-02 Yoshida Kogyo Kk Concealed zip fastener
US3925857A (en) * 1973-09-17 1975-12-16 Yoshida Kogyo Kk Slider for a slide fastener
US3926017A (en) * 1973-10-24 1975-12-16 Yoshida Kogyo Kk Warp knitted tape for slide fasteners
US3996773A (en) * 1973-11-19 1976-12-14 Yoshida Kogyo Kabushiki Kaisha Warp-knitted tape for slide fasteners
US4002045A (en) * 1973-10-06 1977-01-11 Opti-Holding Ag Warp-knit support tape for slide-fastener stringer
US4041577A (en) * 1975-02-28 1977-08-16 Yoshida Kogyo Kabushiki Kaisha Stringer for sliding clasp fastener
US4047265A (en) * 1975-02-28 1977-09-13 Yoshida Kogyo Kabushiki Kaisha Fastener stringer
US4074398A (en) * 1974-09-27 1978-02-21 Yoshida Kogyo Kabushiki Kaisha Slide fastener tape
US4134185A (en) * 1976-04-07 1979-01-16 Optilon W. Erich Heilmann Gmbh Warp-knit slide-fastener stringer half and method of making same
US4134353A (en) * 1971-11-19 1979-01-16 Textron Inc. Sliding clasp fastener and method of producing the same
US5257515A (en) * 1991-09-30 1993-11-02 Yoshida Kogyo K. K. Stringer for a concealed type of slide fastener

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5078403U (en) * 1973-11-27 1975-07-07
JPS5925216Y2 (en) * 1978-07-31 1984-07-25 ワイケイケイ株式会社 Warp knitting tape for slide fasteners
JPS601604Y2 (en) * 1980-12-16 1985-01-17 ワイケイケイ株式会社 Slide fastener
CA1177629A (en) * 1981-06-26 1984-11-13 Emerson Electric Co. Thermally actuatable electrical switches
JPS615119U (en) * 1984-06-13 1986-01-13 ワイケイケイ株式会社 Airtight and waterproof slide fastener

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433279A (en) * 1945-01-24 1947-12-23 American Viscose Corp Warp knitted fabric structure
US2652705A (en) * 1950-09-11 1953-09-22 Lastik Seam Sales Corp Tape
US2903775A (en) * 1956-03-26 1959-09-15 Conmar Prod Corp Slide fasteners
US2959837A (en) * 1958-03-03 1960-11-15 Jette Emile Combined knitting and sewing machine
US3149388A (en) * 1962-08-04 1964-09-22 Opti Holding Ag Helical slide fastener
CA713257A (en) * 1965-07-13 Plate And Suter Slide fastener of the continuous wire type

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA713257A (en) * 1965-07-13 Plate And Suter Slide fastener of the continuous wire type
US2433279A (en) * 1945-01-24 1947-12-23 American Viscose Corp Warp knitted fabric structure
US2652705A (en) * 1950-09-11 1953-09-22 Lastik Seam Sales Corp Tape
US2903775A (en) * 1956-03-26 1959-09-15 Conmar Prod Corp Slide fasteners
US2959837A (en) * 1958-03-03 1960-11-15 Jette Emile Combined knitting and sewing machine
US3149388A (en) * 1962-08-04 1964-09-22 Opti Holding Ag Helical slide fastener

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848556A (en) * 1970-12-04 1974-11-19 Yoshida Kogyo Kk Method for producing a sliding clasp fastener
US3849842A (en) * 1971-08-18 1974-11-26 Yoshida Kogyo Kk Slide fasteners
US3874036A (en) * 1971-08-20 1975-04-01 Yoshida Kogyo Kk Sliding clasp fasteners
US4134353A (en) * 1971-11-19 1979-01-16 Textron Inc. Sliding clasp fastener and method of producing the same
US3922760A (en) * 1971-12-21 1975-12-02 Yoshida Kogyo Kk Concealed zip fastener
US3881326A (en) * 1972-03-01 1975-05-06 Fontanille & Fils Elastelle Device for and method of making a knitted band having a spiral zipper incorporated therein
US3925857A (en) * 1973-09-17 1975-12-16 Yoshida Kogyo Kk Slider for a slide fastener
US4002045A (en) * 1973-10-06 1977-01-11 Opti-Holding Ag Warp-knit support tape for slide-fastener stringer
US3926017A (en) * 1973-10-24 1975-12-16 Yoshida Kogyo Kk Warp knitted tape for slide fasteners
US3996773A (en) * 1973-11-19 1976-12-14 Yoshida Kogyo Kabushiki Kaisha Warp-knitted tape for slide fasteners
US4074398A (en) * 1974-09-27 1978-02-21 Yoshida Kogyo Kabushiki Kaisha Slide fastener tape
US4041577A (en) * 1975-02-28 1977-08-16 Yoshida Kogyo Kabushiki Kaisha Stringer for sliding clasp fastener
US4047265A (en) * 1975-02-28 1977-09-13 Yoshida Kogyo Kabushiki Kaisha Fastener stringer
US4134185A (en) * 1976-04-07 1979-01-16 Optilon W. Erich Heilmann Gmbh Warp-knit slide-fastener stringer half and method of making same
US5257515A (en) * 1991-09-30 1993-11-02 Yoshida Kogyo K. K. Stringer for a concealed type of slide fastener

Also Published As

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DE2016146A1 (en) 1971-10-14
ES189366Y (en) 1974-10-16
GB1299918A (en) 1972-12-13
DE2016146B2 (en) 1974-10-17
JPS5033466B1 (en) 1975-10-30
FR2092198A5 (en) 1971-01-21
DE2016146C3 (en) 1979-12-13
ES189366U (en) 1974-03-16
JPS545743B1 (en) 1979-03-20

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