CA1135946A - Slide fastener stringer - Google Patents
Slide fastener stringerInfo
- Publication number
- CA1135946A CA1135946A CA000342389A CA342389A CA1135946A CA 1135946 A CA1135946 A CA 1135946A CA 000342389 A CA000342389 A CA 000342389A CA 342389 A CA342389 A CA 342389A CA 1135946 A CA1135946 A CA 1135946A
- Authority
- CA
- Canada
- Prior art keywords
- tape
- stringer
- thread
- needle thread
- fastener elements
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B19/00—Slide fasteners
- A44B19/24—Details
- A44B19/40—Connection of separate, or one-piece, interlocking members to stringer tapes; Reinforcing such connections, e.g. by stitching
- A44B19/406—Connection of one-piece interlocking members
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B19/00—Slide fasteners
- A44B19/10—Slide fasteners with a one-piece interlocking member on each stringer tape
- A44B19/12—Interlocking member in the shape of a continuous helix
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
- D05B3/12—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for fastening articles by sewing
- D05B3/18—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for fastening articles by sewing hooks or eyelets
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B93/00—Stitches; Stitch seams
-
- 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
- Y10T24/2523—Zipper or required component thereof having coiled or bent continuous wire interlocking surface with core encircled by coils or bends
-
- 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
- Y10T24/2527—Attached by stitching
- Y10T24/2529—String or stringer tape having distinctive property [e.g., heat sensitive]
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Slide Fasteners (AREA)
- Sewing Machines And Sewing (AREA)
- Woven Fabrics (AREA)
- Knitting Of Fabric (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A slide fastener stringer is disclosed of the type wherein the coupling elements are of the type having each a pair of upper and lower legs, one at each respective face of the stringer tape. The coupling elements are secured to the tape by sewing stitches composed of a needle thread and a looper thread. The needle thread has a plurality of loops each passing through the tape from the lower surface of the tape and extending between respective adjacent pairs of the fastener elements. The looper thread has a plurality of loops each extending across and over one of the upper legs. The interlacings and interloopings of the needle thread with the loops of the looper thread are disposed between respective adjacent pairs of the upper legs. The needle thread consists of a thermally contractable monofilament yarn, while the looper thread is of a non-monofilament yarn. After the needle thread is sewn to the tape, it is shrunk by heat-setting.
The invention improves dimensional stability of the stringer.
A slide fastener stringer is disclosed of the type wherein the coupling elements are of the type having each a pair of upper and lower legs, one at each respective face of the stringer tape. The coupling elements are secured to the tape by sewing stitches composed of a needle thread and a looper thread. The needle thread has a plurality of loops each passing through the tape from the lower surface of the tape and extending between respective adjacent pairs of the fastener elements. The looper thread has a plurality of loops each extending across and over one of the upper legs. The interlacings and interloopings of the needle thread with the loops of the looper thread are disposed between respective adjacent pairs of the upper legs. The needle thread consists of a thermally contractable monofilament yarn, while the looper thread is of a non-monofilament yarn. After the needle thread is sewn to the tape, it is shrunk by heat-setting.
The invention improves dimensional stability of the stringer.
Description
~3~
ACKGROUND OF THE INVENTION
Fleld of -the Invention -The present invention relates to a slide fastener stringer including a stringer tape and a series of fastener coupling elements sewn to the tape along its one longitudinal edge by utilizing multi-thread chain stitch or "double locked stitch".
Prior Art In sewing a series of fast:ener coupling elements to a stringer tape for a slide fastener, one of the most widely used stitch types is multi-thread chain stitch or "double locked stitch", which is formed with two or more sewing threads, i.e.
needle and looper threads. It has been customary to use spun or multifilament yarn as both of the needle and looper threads, because such non-monofilament yarns are flexible and less stretchable and hence enable the fastener elements to be sewn to the tape tightly on a high-speed sewing machine without breakage of a sewing needle.
A common problem encountered with such prior slide fastener stringer is that, because the material and fabric structure of the modern stringer tape are usually of the type having less frictional resistance, the needle thread is liable to become loose from its cut end portions which have been cut as the fastener stringer of a continuous length has been severed into a slide fastener length. With this arrangement, when the opposite stringer tapes are laterally pulled at their one end in opposite directions during threading of a pair of the interengaged fastener stringers through a slider, the extreme one or two or even more of the fastener elements on each tape would be easily displaced~
Consequently, it would be difficult or sometimes impossible to ~L~L35~
mount the slider onto the interengaged fastener stringers.
U.S. Patent No. 3~783,476 discloses a slide fastener stringer having a row of fastener elements secured to a string~
er tape by means of single-needle double locked stitch formed with needle and looper threads, of which only needle thread includes a monofilament yarn. The needle thread is disposed on the fastener element side of the slide fastener stringer, and therefore, the stitching must be done from that side.
This re~uires a specially designed guide means to support the slide fastener stringer such that the surface of the stringer tape on which the fastener elements are to be attached faces upward during sewing operation. With this arrangement, sufficient degree of tightness of the stitching is difficult to achieve.
U.S. Patent No. 3,768,125 discloses another slide fastener .1 ~
stringer having a row of fastener elements secured to a stringer tape by means of single-needle double locked stitch formed with needle and looper threads each consisting of a monofilament yarn.
Not only because monofilament yarns have rigidity by nature, but also because loops of such monofilamentary looper thread extends across and over the fastener elements, sufficient degree of flexibility of the slide fastener stringer is difficult to achieve.
FIG. 7 of the accompanying drawings shown, in transverse cross section, a fragment of a pair of interengaged slide fasten-er stringers 50,51 of the prior art in which a pair of rows of coupling elements 52,53 are attached to a pair of stringer tapes .
54,55, respectively, by use of single needle double locked stitch but with an insufficlent degree of tightness. Assuming that the fastener stringer 50,51 are sharply bent in the longitudinal '~J , !
, 3 -~3S~
direction such that the top surface ~undersurface in this Figure) of the tape 54,55 on which the coupling elements 52,53 axe attached becomes concave, the tape edges with *he sewing stitches 57,57 are displaced from the normal position toward respective connecting portions 58,58 of the opposed coupling elements 52, 5Z, i.e. from the phantom line position to the solid line position. Therefore, the prior slide fastener ; stringers50,51 would often accidentally split open when they are bent.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a slide fastener stringer which enables smooth threading of a slider.
Another object of the invention is to provide a slide fastener stringer which is free from accidentally splitting apart from a companion stringer when the coupled stringers are bent in either direction.
Still another object of the invention is to provide a slide fastener stringer which can be manufactured less costly.
In general terms, the present invention provides a slide fastener stringer comprising: a stringer tape having a pair of opposite surfaces; a series of fastener elements disposed on one of said surfaces of said stringer tape along one longitudinal edge thereof, each of said fastener elements having an upper leg and a lower leg spaced from said upper leg and lying on said one surface of said stringer tape; and sewing stiches securing said fastener elements to said stringer tape, said sewing stitches being composed of a needle thread and a looper thread, said needle thread having a plurality of loops _~_ .
5~L6 each passing through said tape from the other surface thereof and extending in between respective adjacent pairs of said fastener elements, said looper thread having a plurality of loops each extending across and over one of said upper legs, said needle thread being interlaced and interlooped with said loops of said looper thread such that the interlacings and interloopings are disposed between respective adjacent pairs of said upper legs of said fastener elements; said needle thread consisting of a the!rmally contractable mono-filament yarn, said looper thread consisting of a non-monofilament yarn;said needle thread, after being sewn to said tape, being heat-set to shrink it and render it dimensionally stable.
Many other advantages, features and additional objects of the present invention will become maniest to those versed in the art upon making reference to the detailed description and the accompanying drawings in which preferred structural embodiments incorporating the principles of the present invention are shown by way of example.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a fragmentary top plan view of a pair of slide fastener stringers embodying the present invention9 with a fragment of a slider indicated by phantom lines;
FIG. 2 is a cross-sectional view taken along line II-II
of FIG. 1;
FIG. 3 is a cross-sectional view taken along line III-III of FIG. l;
FIG. 4 is a cross-sectional view taken alon~ line IV-IV of FIG. 1;
`:i - - i .: ~ . `
L355~46;
FIGS. 5 and 6 illustrate the manner in which the interengaged pair of slide fastener stringers is threaded through a slider;
FIG. 7 is a fragmentary transverse cross-sectional view of a conventional slide faslener as it is being bent;
FIG~. 8 and 9 are transverse cross-sectional views similar .
: 2b -5a-`' . ~ ' ; ! ' , ' . ,. ~ . , , :,, ,' ` ,. . .
~3S9~6 to FIG. 2 but showing second and third embodiments, respecti~e~
ly; and FIG. 10 shows the cross-sectional shape of each of various needle threads.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The principles of the present invention are particular-ly useful when embodied in a slide fastener assembly (herein-after referred to as "slide fastener") such as shown in FIGS.
1-4, generally indicated by the numeral 11.
The slide fastener 11 comprises a pair of fastener stringers 12,13 including a pair of stringer tapes 14,15, res-pectively, each supporting on and along its one longitudinal edge a series of ~astener elements or con~olutions 16 in the form of a continuous filamentary coil made of a thermoplastic synthetic resin. Each series of coupling elements 16 is secured to the tape 14,15 by means of sewing stitches. The stitch type of the sewing stitches is multi-thread chain stitch or "double locked stitch", which i5 formed with a needle thread 17 and a !l Il loo~er thread 18. Each of the coupling elements 16 has a pair ofspaced upper and lower legs 19,20, and a coupling head 21 extending therebetween. The lower leg 20 of each element lies ¦l on the top surface 23 (FIGS. 2 and 3) of the stringer tape 14,15 and is connected to the upper leg 19 of a preceding or succeeding one o the elementsl6 by a connecting portion 22, the uppex ele-ment leg 19 being spaced apart from the same tape surface 23.
A core 24 in the form of a textile cord extends longitudinally !l - - ' :
through the series of coupling elements 16 and is held by the sewing stitches against the connecting portions 22 in the interior of the coupling elements 16.
The needle thread 17 includes a monofilament yarn made . ~ ,. .
~ , - 6 - I
. ., . :, :- . :
~3S~
of a syn-thetic resin such as nylon and having a coefficient of thermal contraction (preferably a great coefficient of thermal contraction). The looper thread 18 includes a non-monofilament yarn, i.e. a multifilament or spun yarn, which is made of a synthetic resin such as polyester.
As shown in FIG. 3, the needle thread 17 has loops 25 each passing through the tape 14,15 from the underside thereof and extending in between adjacent two of the fastener elements 16. The looper thread 18 has loops 26 extending across and over every one of the upper legs 19. The loops 25 of the needle thread 17 are interlaced and interlooped with the loops 26 of the looper thread 18 such that the interlacings and interloopings 27 are disposed between adjacent upper element legs 19.
After sewing of the fastener elements 16 to the stringer tape 14,15 as described above, the needle thread 17, which consists of a monofilament yarn having a coefficient of thermal contraction, has been heat-set by applying a heated medium, for ; I instance, during a dyeing process discussed below. At that time, because of its coefficient of thermal contraction, the needle thread 17 has shrunk to bring the interlacings and inter:loopsings 1 27 toward the surface 23 of the tape 14,15, causing the looper jl thread 18 to extend around every one of the upper element legs l9 with an increased degree of tightness, as shown in FIGSu 3 and ~ ll 4. Meanwhile, the tape 14,15 is held by the tightened needle ; ~ thread 17 against the lower legs 20 of the fastener elements 16 so that the individual lower element legs 20 are slightly ~; depressed in the top surface 23 (FIGS. 3 and 4) and hence can be kept from being displaced in a longitudinal direction of the element row.
- '' As a result o:E the heat-setting, the needle thread :L7 has become dimensiorlally stable; that is, the bent configura-tions 28,29 ~FIGS. 3 and 4) of the need:Le thread 17 are maintain-ed against further dimensional change, thereby preventing the needle thread 17 as well as the looper thread 18 from becoming loose at the cut end portions 30,31 of the slide fastener stringers 12,13, respectively.
More specifically, in case the needle thread 17 has been cut such that its cut end 32 po:Lnt upward (FIG. 3), the needle thread 17 would not become loose because of the bent configura-tion 28 which is kept in stable. And the loops 26 of the looper thread 18 would not become loose because of the bent confiyura-tion 29 (loop 25) of the needle thread 17. In case the needle thread 17 has been cut such that its cut end 33 point downward (FIG. 4), the looper thread 18 is held at its cut end portion by the extreme needle thread loop 25 of which bent configuration 29 would not change. Accordingly, the extreme one or two of , the fastener elements 16 can be prevented nicely f.rom being separated apart from the tape 14,15, no matter where the cut of the slide fastener stringer 12,13 is located.
The interengaged slide fastener stringers thus construct-ed can be threaded through a slider 34 (FIGS. 5 and 6) from its rear end mouth 35 with maximum ease. In such threading, the interengaged slide fastener stringers 12,13 are inserted into the slider 34 from the rear end mouth 35 thereof until the 1.
leading end of the interengaged rows of fastener elements 16 reaches just in front of a slider neck 36, as shown in FIG~ 5.
At .that time, the opposed stringer tapes 14,15 are supported at their respecti~re leading ends by the fingers. Then, the opposed stringer tapes 14,15 are pulled in the directions indica-ted by :, ..
.. . ..
: :
. i , . .
~ ' . : ' , ~ .. . .
~3~
arrows 37,38 (FIG. 5), respectively, to disengage the mating of the opposed rows of fastener elements 16 at their leading end portions, as shown in FIG. 6. Subsequently, ~he opposed stringer tapes 14,15 are pulled beyond the front end 41 of the slider 34 in the dixections of arrows 39,40, respectively. Thus, the mounting of the slider 34 ont:o the interengaged slide fasten-er stringers 12,13 has been completed. During this threading operation, the extreme one or two of the fastener elements 16 on each tape 14,15 would be kept stable in position even when rela-tively great pulling forces (37,38) act on the opposed stringer tapes 14,15.
In order to keep the individual fastener elements 16 from being displaced especially laterally on the tape 14,15, the fastener elements 16 may be provided with a nonskid means such as shown in FIGS. 8 and 9.
According to an embodiment of FIG. 8, the lower leg 20 of each fastener element 16 has a corrugated surface 40 which is in contact with the tape surface 23.
According to an embodiment of FIG. 9, the lower leg 20 of each fastener element 16 has a roughened surface 41 which is touching the tape surface 23. The roughened surfaces 41 may be formed by heat~setting, for instance, by applying a heated ' medium. Such heat-setting is discussed in my commonly assigned - Canadian Patent Application, Se. Mo. 320,459 filed January 30, 1979.
In this embodiment, the stringer tape 14,15 has a warp-knitted structure having on its underside a plurality of laterally spaced wales 42 and hence interwale grooves 43, and the needle thread 17 is received in one of the interwale grooves 43 and is kept in stable.
To obtain an increased degree of frictional resistance, .~_ g _ ~3~3q~
the needle thread 17 may be of a noncircular cross section, such as ellipse (a), triangle (b), square (c) or rectangle (d) (FIG. 10).
In any one of the embodiments described above, the needle thread 17 is disposed on the tape side of the slide fastener stringer 12,13, while the looper thread 18 is disposed on the fastener element side. With such arrangement, the slide fasten-er stringer can be guided in such a manner that the surface 23 of the stringer tape 14 t 15 on which the fastener elements ~6 are to be attached faces downwardly during sewing operation, requir~
ing no specially designe~ guide means and hence no expensive and complicated sewing machine.
Although various minor modifications may be suggested by those versed in the art, it should be understood that I wish to embody within the scope of the patent warranted hereon, all such embodiments as reasonably and properly come within the scope of my contribution to the art.
, ~ ~
, ~ , ~i ,. I
1, ,
ACKGROUND OF THE INVENTION
Fleld of -the Invention -The present invention relates to a slide fastener stringer including a stringer tape and a series of fastener coupling elements sewn to the tape along its one longitudinal edge by utilizing multi-thread chain stitch or "double locked stitch".
Prior Art In sewing a series of fast:ener coupling elements to a stringer tape for a slide fastener, one of the most widely used stitch types is multi-thread chain stitch or "double locked stitch", which is formed with two or more sewing threads, i.e.
needle and looper threads. It has been customary to use spun or multifilament yarn as both of the needle and looper threads, because such non-monofilament yarns are flexible and less stretchable and hence enable the fastener elements to be sewn to the tape tightly on a high-speed sewing machine without breakage of a sewing needle.
A common problem encountered with such prior slide fastener stringer is that, because the material and fabric structure of the modern stringer tape are usually of the type having less frictional resistance, the needle thread is liable to become loose from its cut end portions which have been cut as the fastener stringer of a continuous length has been severed into a slide fastener length. With this arrangement, when the opposite stringer tapes are laterally pulled at their one end in opposite directions during threading of a pair of the interengaged fastener stringers through a slider, the extreme one or two or even more of the fastener elements on each tape would be easily displaced~
Consequently, it would be difficult or sometimes impossible to ~L~L35~
mount the slider onto the interengaged fastener stringers.
U.S. Patent No. 3~783,476 discloses a slide fastener stringer having a row of fastener elements secured to a string~
er tape by means of single-needle double locked stitch formed with needle and looper threads, of which only needle thread includes a monofilament yarn. The needle thread is disposed on the fastener element side of the slide fastener stringer, and therefore, the stitching must be done from that side.
This re~uires a specially designed guide means to support the slide fastener stringer such that the surface of the stringer tape on which the fastener elements are to be attached faces upward during sewing operation. With this arrangement, sufficient degree of tightness of the stitching is difficult to achieve.
U.S. Patent No. 3,768,125 discloses another slide fastener .1 ~
stringer having a row of fastener elements secured to a stringer tape by means of single-needle double locked stitch formed with needle and looper threads each consisting of a monofilament yarn.
Not only because monofilament yarns have rigidity by nature, but also because loops of such monofilamentary looper thread extends across and over the fastener elements, sufficient degree of flexibility of the slide fastener stringer is difficult to achieve.
FIG. 7 of the accompanying drawings shown, in transverse cross section, a fragment of a pair of interengaged slide fasten-er stringers 50,51 of the prior art in which a pair of rows of coupling elements 52,53 are attached to a pair of stringer tapes .
54,55, respectively, by use of single needle double locked stitch but with an insufficlent degree of tightness. Assuming that the fastener stringer 50,51 are sharply bent in the longitudinal '~J , !
, 3 -~3S~
direction such that the top surface ~undersurface in this Figure) of the tape 54,55 on which the coupling elements 52,53 axe attached becomes concave, the tape edges with *he sewing stitches 57,57 are displaced from the normal position toward respective connecting portions 58,58 of the opposed coupling elements 52, 5Z, i.e. from the phantom line position to the solid line position. Therefore, the prior slide fastener ; stringers50,51 would often accidentally split open when they are bent.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a slide fastener stringer which enables smooth threading of a slider.
Another object of the invention is to provide a slide fastener stringer which is free from accidentally splitting apart from a companion stringer when the coupled stringers are bent in either direction.
Still another object of the invention is to provide a slide fastener stringer which can be manufactured less costly.
In general terms, the present invention provides a slide fastener stringer comprising: a stringer tape having a pair of opposite surfaces; a series of fastener elements disposed on one of said surfaces of said stringer tape along one longitudinal edge thereof, each of said fastener elements having an upper leg and a lower leg spaced from said upper leg and lying on said one surface of said stringer tape; and sewing stiches securing said fastener elements to said stringer tape, said sewing stitches being composed of a needle thread and a looper thread, said needle thread having a plurality of loops _~_ .
5~L6 each passing through said tape from the other surface thereof and extending in between respective adjacent pairs of said fastener elements, said looper thread having a plurality of loops each extending across and over one of said upper legs, said needle thread being interlaced and interlooped with said loops of said looper thread such that the interlacings and interloopings are disposed between respective adjacent pairs of said upper legs of said fastener elements; said needle thread consisting of a the!rmally contractable mono-filament yarn, said looper thread consisting of a non-monofilament yarn;said needle thread, after being sewn to said tape, being heat-set to shrink it and render it dimensionally stable.
Many other advantages, features and additional objects of the present invention will become maniest to those versed in the art upon making reference to the detailed description and the accompanying drawings in which preferred structural embodiments incorporating the principles of the present invention are shown by way of example.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a fragmentary top plan view of a pair of slide fastener stringers embodying the present invention9 with a fragment of a slider indicated by phantom lines;
FIG. 2 is a cross-sectional view taken along line II-II
of FIG. 1;
FIG. 3 is a cross-sectional view taken along line III-III of FIG. l;
FIG. 4 is a cross-sectional view taken alon~ line IV-IV of FIG. 1;
`:i - - i .: ~ . `
L355~46;
FIGS. 5 and 6 illustrate the manner in which the interengaged pair of slide fastener stringers is threaded through a slider;
FIG. 7 is a fragmentary transverse cross-sectional view of a conventional slide faslener as it is being bent;
FIG~. 8 and 9 are transverse cross-sectional views similar .
: 2b -5a-`' . ~ ' ; ! ' , ' . ,. ~ . , , :,, ,' ` ,. . .
~3S9~6 to FIG. 2 but showing second and third embodiments, respecti~e~
ly; and FIG. 10 shows the cross-sectional shape of each of various needle threads.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The principles of the present invention are particular-ly useful when embodied in a slide fastener assembly (herein-after referred to as "slide fastener") such as shown in FIGS.
1-4, generally indicated by the numeral 11.
The slide fastener 11 comprises a pair of fastener stringers 12,13 including a pair of stringer tapes 14,15, res-pectively, each supporting on and along its one longitudinal edge a series of ~astener elements or con~olutions 16 in the form of a continuous filamentary coil made of a thermoplastic synthetic resin. Each series of coupling elements 16 is secured to the tape 14,15 by means of sewing stitches. The stitch type of the sewing stitches is multi-thread chain stitch or "double locked stitch", which i5 formed with a needle thread 17 and a !l Il loo~er thread 18. Each of the coupling elements 16 has a pair ofspaced upper and lower legs 19,20, and a coupling head 21 extending therebetween. The lower leg 20 of each element lies ¦l on the top surface 23 (FIGS. 2 and 3) of the stringer tape 14,15 and is connected to the upper leg 19 of a preceding or succeeding one o the elementsl6 by a connecting portion 22, the uppex ele-ment leg 19 being spaced apart from the same tape surface 23.
A core 24 in the form of a textile cord extends longitudinally !l - - ' :
through the series of coupling elements 16 and is held by the sewing stitches against the connecting portions 22 in the interior of the coupling elements 16.
The needle thread 17 includes a monofilament yarn made . ~ ,. .
~ , - 6 - I
. ., . :, :- . :
~3S~
of a syn-thetic resin such as nylon and having a coefficient of thermal contraction (preferably a great coefficient of thermal contraction). The looper thread 18 includes a non-monofilament yarn, i.e. a multifilament or spun yarn, which is made of a synthetic resin such as polyester.
As shown in FIG. 3, the needle thread 17 has loops 25 each passing through the tape 14,15 from the underside thereof and extending in between adjacent two of the fastener elements 16. The looper thread 18 has loops 26 extending across and over every one of the upper legs 19. The loops 25 of the needle thread 17 are interlaced and interlooped with the loops 26 of the looper thread 18 such that the interlacings and interloopings 27 are disposed between adjacent upper element legs 19.
After sewing of the fastener elements 16 to the stringer tape 14,15 as described above, the needle thread 17, which consists of a monofilament yarn having a coefficient of thermal contraction, has been heat-set by applying a heated medium, for ; I instance, during a dyeing process discussed below. At that time, because of its coefficient of thermal contraction, the needle thread 17 has shrunk to bring the interlacings and inter:loopsings 1 27 toward the surface 23 of the tape 14,15, causing the looper jl thread 18 to extend around every one of the upper element legs l9 with an increased degree of tightness, as shown in FIGSu 3 and ~ ll 4. Meanwhile, the tape 14,15 is held by the tightened needle ; ~ thread 17 against the lower legs 20 of the fastener elements 16 so that the individual lower element legs 20 are slightly ~; depressed in the top surface 23 (FIGS. 3 and 4) and hence can be kept from being displaced in a longitudinal direction of the element row.
- '' As a result o:E the heat-setting, the needle thread :L7 has become dimensiorlally stable; that is, the bent configura-tions 28,29 ~FIGS. 3 and 4) of the need:Le thread 17 are maintain-ed against further dimensional change, thereby preventing the needle thread 17 as well as the looper thread 18 from becoming loose at the cut end portions 30,31 of the slide fastener stringers 12,13, respectively.
More specifically, in case the needle thread 17 has been cut such that its cut end 32 po:Lnt upward (FIG. 3), the needle thread 17 would not become loose because of the bent configura-tion 28 which is kept in stable. And the loops 26 of the looper thread 18 would not become loose because of the bent confiyura-tion 29 (loop 25) of the needle thread 17. In case the needle thread 17 has been cut such that its cut end 33 point downward (FIG. 4), the looper thread 18 is held at its cut end portion by the extreme needle thread loop 25 of which bent configuration 29 would not change. Accordingly, the extreme one or two of , the fastener elements 16 can be prevented nicely f.rom being separated apart from the tape 14,15, no matter where the cut of the slide fastener stringer 12,13 is located.
The interengaged slide fastener stringers thus construct-ed can be threaded through a slider 34 (FIGS. 5 and 6) from its rear end mouth 35 with maximum ease. In such threading, the interengaged slide fastener stringers 12,13 are inserted into the slider 34 from the rear end mouth 35 thereof until the 1.
leading end of the interengaged rows of fastener elements 16 reaches just in front of a slider neck 36, as shown in FIG~ 5.
At .that time, the opposed stringer tapes 14,15 are supported at their respecti~re leading ends by the fingers. Then, the opposed stringer tapes 14,15 are pulled in the directions indica-ted by :, ..
.. . ..
: :
. i , . .
~ ' . : ' , ~ .. . .
~3~
arrows 37,38 (FIG. 5), respectively, to disengage the mating of the opposed rows of fastener elements 16 at their leading end portions, as shown in FIG. 6. Subsequently, ~he opposed stringer tapes 14,15 are pulled beyond the front end 41 of the slider 34 in the dixections of arrows 39,40, respectively. Thus, the mounting of the slider 34 ont:o the interengaged slide fasten-er stringers 12,13 has been completed. During this threading operation, the extreme one or two of the fastener elements 16 on each tape 14,15 would be kept stable in position even when rela-tively great pulling forces (37,38) act on the opposed stringer tapes 14,15.
In order to keep the individual fastener elements 16 from being displaced especially laterally on the tape 14,15, the fastener elements 16 may be provided with a nonskid means such as shown in FIGS. 8 and 9.
According to an embodiment of FIG. 8, the lower leg 20 of each fastener element 16 has a corrugated surface 40 which is in contact with the tape surface 23.
According to an embodiment of FIG. 9, the lower leg 20 of each fastener element 16 has a roughened surface 41 which is touching the tape surface 23. The roughened surfaces 41 may be formed by heat~setting, for instance, by applying a heated ' medium. Such heat-setting is discussed in my commonly assigned - Canadian Patent Application, Se. Mo. 320,459 filed January 30, 1979.
In this embodiment, the stringer tape 14,15 has a warp-knitted structure having on its underside a plurality of laterally spaced wales 42 and hence interwale grooves 43, and the needle thread 17 is received in one of the interwale grooves 43 and is kept in stable.
To obtain an increased degree of frictional resistance, .~_ g _ ~3~3q~
the needle thread 17 may be of a noncircular cross section, such as ellipse (a), triangle (b), square (c) or rectangle (d) (FIG. 10).
In any one of the embodiments described above, the needle thread 17 is disposed on the tape side of the slide fastener stringer 12,13, while the looper thread 18 is disposed on the fastener element side. With such arrangement, the slide fasten-er stringer can be guided in such a manner that the surface 23 of the stringer tape 14 t 15 on which the fastener elements ~6 are to be attached faces downwardly during sewing operation, requir~
ing no specially designe~ guide means and hence no expensive and complicated sewing machine.
Although various minor modifications may be suggested by those versed in the art, it should be understood that I wish to embody within the scope of the patent warranted hereon, all such embodiments as reasonably and properly come within the scope of my contribution to the art.
, ~ ~
, ~ , ~i ,. I
1, ,
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A slide fastener stringer comprising:
(a) a stringer tape having a pair of opposite surfaces;
(b) a series of fastener elements disposed on one of said surfaces of said stringer tape along one longitudinal edge thereof, each of said fastener elements having an upper leg and a lower leg spaced from said upper leg and lying on said one surface of said stringer tape; and (c) sewing stitches securing said fastener elements to said stringer tape, said sewing stitches being composed of a needle thread and a looper thread, said needle thread having a plurality of loops each passing through said tape from the other surface thereof and extending in between respec-tive adjacent pairs of said fastener elements, said looper thread having a plurality of loops each extending across and over one of said upper legs, said needle thread being interlaced and interlooped with said loops of said looper thread such that the interlacings and interloopings are disposed between respective adjacent pairs of said upper legs of said fastener elements;
(d) said needle thread consisting of a thermally con-tractable monofilament yarn, said looper thread con-sisting of a non-monofilament yarn;
(e) said needle thread, after being sewn to said tape, being heat-set to shrink it and render it dimensionally stable.
(a) a stringer tape having a pair of opposite surfaces;
(b) a series of fastener elements disposed on one of said surfaces of said stringer tape along one longitudinal edge thereof, each of said fastener elements having an upper leg and a lower leg spaced from said upper leg and lying on said one surface of said stringer tape; and (c) sewing stitches securing said fastener elements to said stringer tape, said sewing stitches being composed of a needle thread and a looper thread, said needle thread having a plurality of loops each passing through said tape from the other surface thereof and extending in between respec-tive adjacent pairs of said fastener elements, said looper thread having a plurality of loops each extending across and over one of said upper legs, said needle thread being interlaced and interlooped with said loops of said looper thread such that the interlacings and interloopings are disposed between respective adjacent pairs of said upper legs of said fastener elements;
(d) said needle thread consisting of a thermally con-tractable monofilament yarn, said looper thread con-sisting of a non-monofilament yarn;
(e) said needle thread, after being sewn to said tape, being heat-set to shrink it and render it dimensionally stable.
2. A slide fastener stringer according to claim 1, including means on said fastener elements for preventing said fastener elements from slipping on said stringer tape.
3. A slide fastener stringer according to claim 2, said means comprising a corrugated surface of each of said fastener elements, each said corrugated surface being dis-posed in contact with said tape.
4. A slide fastener stringer according to claim 2, said means comprising on each of said fastener elements a respective rough surface, and said rough surface being in contact with said tape.
5. A slide fastener stringer according to claim 1 or 2, in which said needle thread has a noncircular cross section.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53-160693 | 1978-12-21 | ||
| JP53160693A JPS5932123B2 (en) | 1978-12-21 | 1978-12-21 | Slide fastener |
| JP16069478A JPS5584104A (en) | 1978-12-21 | 1978-12-21 | Slide fastener |
| JP53-160694 | 1978-12-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1135946A true CA1135946A (en) | 1982-11-23 |
Family
ID=26487115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000342389A Expired CA1135946A (en) | 1978-12-21 | 1979-12-20 | Slide fastener stringer |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US4319387A (en) |
| JP (2) | JPS5932123B2 (en) |
| AU (1) | AU525650B2 (en) |
| BE (1) | BE880810A (en) |
| BR (1) | BR7908426A (en) |
| CA (1) | CA1135946A (en) |
| CH (1) | CH643991A5 (en) |
| DE (1) | DE2950808C2 (en) |
| ES (1) | ES247614Y (en) |
| FR (1) | FR2444419B1 (en) |
| GB (1) | GB2039326B (en) |
| HK (1) | HK34887A (en) |
| MY (1) | MY8600296A (en) |
| NL (1) | NL184633C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5933366B2 (en) * | 1979-03-26 | 1984-08-15 | ワイケイケイ株式会社 | Slide fastener |
| JPS60179004A (en) * | 1984-02-24 | 1985-09-12 | ワイケイケイ株式会社 | Slide fastener |
| JPS60155311U (en) * | 1984-03-28 | 1985-10-16 | ワイケイケイ株式会社 | Slide fastener |
| JPH0410711U (en) * | 1990-05-18 | 1992-01-29 | ||
| JP3628215B2 (en) * | 1999-07-30 | 2005-03-09 | Ｙｋｋ株式会社 | Coiled slide fastener |
| JP2001178509A (en) * | 1999-12-27 | 2001-07-03 | Ykk Corp | Filament slide fastener and its manufacturing method |
| JP3679009B2 (en) * | 2001-01-17 | 2005-08-03 | Ｙｋｋ株式会社 | Slide fastener tape |
| TWM245809U (en) * | 2003-12-31 | 2004-10-11 | Jr-Shiung Yu | Suspension decoration |
| KR100849470B1 (en) | 2006-12-04 | 2008-07-30 | 정지옹 | Slide fastener |
| JP5430649B2 (en) * | 2009-03-27 | 2014-03-05 | Ｙｋｋ株式会社 | Continuous fastener element, fastener stringer, and manufacturing method of continuous fastener element |
| KR101428905B1 (en) | 2010-06-30 | 2014-08-08 | 와이케이케이 가부시끼가이샤 | Slide fastener and method for manufacturing slide fastener |
| CN107198301B (en) * | 2013-01-31 | 2020-11-27 | Ykk株式会社 | Article with slide fastener and method for manufacturing article with slide fastener |
| TWI608932B (en) * | 2016-06-03 | 2017-12-21 | Ykk Corp | Zipper continuous chain tooth row manufacturing device and spindle for the same |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1926933U (en) * | 1965-04-06 | 1965-11-11 | Prym Werke William | ZIPPER. |
| DE1280609C2 (en) * | 1965-11-04 | 1973-05-17 | Hans Porepp | Method and device for producing two coupled rows of zipper links |
| DE1610372A1 (en) * | 1966-07-05 | 1971-03-25 | Opti Holding Ag | Concealed zipper, especially for the clothing industry |
| FR1531836A (en) * | 1966-07-15 | 1968-07-05 | Opti Holding Ag | Covered zipper |
| GB1128413A (en) * | 1966-09-06 | 1968-09-25 | Lightning Fasteners Ltd | Improvements in or relating to stringers for sliding clasp fasteners of the concealed element type |
| NO119295B (en) * | 1966-10-15 | 1970-04-27 | Opti Holding Ag | |
| US3487531A (en) * | 1967-11-09 | 1970-01-06 | Scovill Manufacturing Co | Method of making slide fastener stringers |
| DE1808358B2 (en) * | 1967-11-21 | 1979-06-21 | Hans-Ulrich 5408 Nassau Sohr | Method of making a slide fastener |
| GB1301467A (en) * | 1970-08-14 | 1972-12-29 | ||
| AT326067B (en) * | 1971-06-17 | 1975-11-25 | Yoshida Kogyo Kk | ZIPPER |
| DE2151001C3 (en) * | 1971-10-13 | 1975-08-28 | Opti-Holding Ag, Glarus (Schweiz) | Zipper |
| DE2150999A1 (en) * | 1971-10-13 | 1973-04-19 | Opti Holding Ag | ZIPPER |
| JPS5435769Y2 (en) * | 1974-09-25 | 1979-10-30 | ||
| US3975801A (en) * | 1975-01-09 | 1976-08-24 | Textron, Inc. | Slide fastener stringer |
| DE2614905A1 (en) * | 1976-04-07 | 1977-10-20 | Heilmann Optilon | ZIPPER WITH KNITTED STRAPS |
| JPS5620974Y2 (en) * | 1976-10-12 | 1981-05-18 |
-
1978
- 1978-12-21 JP JP53160693A patent/JPS5932123B2/en not_active Expired
- 1978-12-21 JP JP16069478A patent/JPS5584104A/en active Granted
-
1979
- 1979-12-14 AU AU53873/79A patent/AU525650B2/en not_active Ceased
- 1979-12-14 NL NLAANVRAGE7909029,A patent/NL184633C/en not_active IP Right Cessation
- 1979-12-17 DE DE2950808A patent/DE2950808C2/en not_active Expired
- 1979-12-19 FR FR7931169A patent/FR2444419B1/en not_active Expired
- 1979-12-19 US US06/105,252 patent/US4319387A/en not_active Expired - Lifetime
- 1979-12-19 BR BR7908426A patent/BR7908426A/en not_active IP Right Cessation
- 1979-12-19 GB GB7943702A patent/GB2039326B/en not_active Expired
- 1979-12-20 ES ES1979247614U patent/ES247614Y/en not_active Expired
- 1979-12-20 CA CA000342389A patent/CA1135946A/en not_active Expired
- 1979-12-21 CH CH1143979A patent/CH643991A5/en not_active IP Right Cessation
- 1979-12-21 BE BE0/198704A patent/BE880810A/en not_active IP Right Cessation
-
1986
- 1986-12-30 MY MY296/86A patent/MY8600296A/en unknown
-
1987
- 1987-04-23 HK HK348/87A patent/HK34887A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CH643991A5 (en) | 1984-07-13 |
| AU5387379A (en) | 1980-06-26 |
| MY8600296A (en) | 1986-12-31 |
| JPS5584104A (en) | 1980-06-25 |
| DE2950808A1 (en) | 1980-07-10 |
| JPS5584103A (en) | 1980-06-25 |
| NL7909029A (en) | 1980-06-24 |
| HK34887A (en) | 1987-05-01 |
| BR7908426A (en) | 1980-07-22 |
| DE2950808C2 (en) | 1984-11-08 |
| BE880810A (en) | 1980-04-16 |
| JPS5932123B2 (en) | 1984-08-07 |
| JPS5735962B2 (en) | 1982-07-31 |
| GB2039326A (en) | 1980-08-06 |
| GB2039326B (en) | 1982-12-22 |
| US4319387A (en) | 1982-03-16 |
| ES247614U (en) | 1980-04-01 |
| FR2444419B1 (en) | 1985-06-28 |
| ES247614Y (en) | 1980-10-01 |
| FR2444419A1 (en) | 1980-07-18 |
| AU525650B2 (en) | 1982-11-18 |
| NL184633C (en) | 1989-09-18 |
| NL184633B (en) | 1989-04-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |