DE1094682B - Process for the production of zippers - Google Patents

Description

The invention relates to a method for producing a slide fastener, its rows of links each by means of one consisting of individual textile fibers or thermoplastic material Threads constructed supporting strand are attached to the supporting tape.

The continuous production of zip fasteners by known processes is such that the Rows of links are connected to the supporting strand and the latter are then attached to the supporting tape. In order to obtain individual specific zipper lengths, those containing the rows of links are used Carrying tapes cut at the appropriate points and at both ends of the carrying tape lengths a piece of the row of links with strand removed, since the zippers coming on the market have the Straps must protrude beyond the rows of links at both ends. The severed link row pieces .are precious waste and the supporting strands also tend to fray when they are cut.

Although there has been proposed a device for holding and transporting the fastener tape and the row of links of a slide fastener strip in attachment of the row of links to the Support tape by means of a link fastening device is used, in which between the link guide rail and between the feeder a controlled knife for cutting through the in the link guide rail incoming row of links is arranged and the drive of the screw spindle during the Cutting process of the knife is stopped. If you use this device to create a zipper wants, whose rows of links each by means of one made of individual, textile fibers or thermoplastic Material existing threads of built-up support strand are attached to the support tape, so the same occur Phenomena such as those mentioned above in the description of the continuous that has been used to this day Manufacturing processes of zippers are described.

On the other hand, it is known to manufacture zippers so that individual pairs on the straps fastened by precut rows of links provided with fastening cords at a distance from one another will. As already indicated, the individual pairs are each lined up on a cord. Here, too, no precautions have been taken to prevent the cords from fraying when dividing to prevent.

The invention is based on the object of avoiding waste and fraying of the strand ends to prevent when cutting through.

According to the invention, the threads of the supporting strand of each row of links over its entire length

Method of manufacture
of zippers

Applicant:

Patent company Plate & Co.,
Altdorf (Switzerland)

Representative: Dipl.-Ing. W. Gollung, patent attorneys,
Frankfurt / M., Kaiserstr. 16

Claimed priority:
V. St. v. America November 25, 1957

Nicolas Anthony Wahl, New York, NY (V. St. A.),
has been named as the inventor

or at individual points at intervals that roughly correspond to the desired row lengths, either, if these threads are made of textile fibers - by impregnation using adhesives, starch, thermoplastic Material or - if these threads are made of thermoplastic material - by fusing connected with each other. The link strips are then, as is known, in the desired Cut to lengths and sewn or welded onto the continuous supporting tapes with space in between.

This avoids any waste of rows of links, and since the cut is made through the glued or solidified areas of the supporting strand, fraying can no longer occur. if the attachment of the supporting strand containing the rows of links has been carried out on the supporting tape, this can Adhesive or solidifying material, if desired, can be washed out again, since then the individual Threads of the supporting strand lengths are held together by the seam that holds them on the supporting tape, so that subsequent fraying can no longer occur.

The invention is illustrated below with reference to schematic drawings of several exemplary embodiments explained in more detail. It shows

Fig. 1 is a plan view of a coil spring zipper,

FIG. 2 shows a partial section along the line 2-2 of FIG. 1,

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3 4

3 shows a partial section along the line 3-3 of FIG. 3. As can be seen from FIG

Fig. 1, a slide upper plate 21 and a slide lower

4 shows a schematic representation of a process plate 22, the former side flanges 23, 24 being

rens for the production of a row of links in order to be seated, starting from the upper slide plate 21

fibers at the ends of the cut-off parts to 5 the lower slide plate 22 are angled too. Of the

prevent the slide 12 from being pushed laterally through the

Fig. 5 is a schematic representation of the course strands 17 and above through the guide parts 15 of the

another method for making a GHe turns 13 out, so that an unintentional

row, the slider intervenes between adjacent win-

Fig. 6 is a detail showing the cut io training pairs, as was the case with earlier zip-lock ends a row of links with built-in reinforcements is prevented. The so far Kungsmaterial shows, described lock design with slide and

Fig. 7 is a perspective view of the sewing with the other items, such. B. Limit

Device for successively attaching advance stops 25 corresponds to the usual design

cut rows of links on a pair of support 15 of a coil spring zipper and is not

tapes. Subject of the present invention.

Fig. 8 is a plan view of the spaced-in order when cutting the link strips on the Rows of links as a result of the length desired in FIG. 7, the support strand 17 fraying showed the sewing process or winding the thread 18 at the cut ends

Fig. 9 to avoid a detail of a further embodiment 20, is in the following in connection with

form of a coil spring zipper in a Fig. 4 describes a suitable method,

the section corresponding to FIG. 3, A continuous link strip is between

Fig. 10 is a perspective view of a sewing several, touching rollers 26 introduced,

machine for joining pre-cut limbs - at least one of which in an adhesive bath 27

rows with the fastener tape, 25 dips, causing liquid glue to hit the surface

11 shows a perspective view of a single one of the supporting strand 17 or of the thread 18 applied

Closure strip of the further execution form. Is. The profile of the section leading to the link strip

Referring to the drawings, ins- Roll 26 is chosen so that the adhesive is only on In particular, FIGS. 1 to 3 have applied a helical spring tear to the supporting strand 17 or the thread 18 Closure in which the straps 10 are screwed and impregnated, but the row of links 11 Ben-shaped rows of links 11 are attached, not being moistened. Of the roles 26 is the link Slide 12 for coupling or uncoupling the strips passed through a suitable heating chamber 28, Closure halves is used. in which the adhesive dries, after which the continued

The rows of links 11 are made of flexible, helical link strips by a cutting device

produced ben-shaped wound plastic threads. ₃₅ tung29 cut into pieces of the desired length

their turns, as can best be seen from FIG.

see is somewhat flattened. As further shown in FIG. 5, a link is therefore

individual turns 13 parallel to each other at a distance with a support strand, the thermoplastic

arranged on the other and thereby form inner dome parts containing yarns, a heating and printing process

14 and outer guide parts 15, 40 by means of a reciprocating plunger 30 An elongated, cord-like support strand 17 is subjected to the interstices on the

runs along the outer edge of each row of link strips at the points where the 11, with a thread 18 separating cuts to be made around the supporting strand 17; The strings is wound, which between each adjacent pair of the support strand 17 are miteinder at these points Turns 13 engages in this and fused around the guide 45. The limb strip then becomes tion part 15 of each turn is looped. The thread through a cutting tool 31 to the fused 18 is therefore cut through in the spaces around the bearing points at predetermined intervals, strand 17 wound, each guide part 15 of a. One advantage of this method is that the limbs-turn is wrapped in order to strip the row of limbs only where it needs to be heated 11 to be connected to the supporting strand 17 and thus 50 is cut so that the remaining rows of links to form an elongated row of links. not heated and consequently not attacked. The row of links 11 and the support strand 17 can. You can use the thermoplastic yarn z. B. from Cellu a standard wrapping machine can be used to produce loose acetate. The advantage of this yarn is so that the thread 18 between the turns 13 of the that it quickly on a plasticizing treatment link row 11 is introduced and responds to the guide part 55 ment, and does not wash out in use

15 and the support strand 17 is wound. On this and is not sensitive to chlorine. This amalgamation kind The connection between the row of links and the carrying and cutting process can be made with the work strand without sewing. Which will be synchronized with the gear of the sewing machine as is the supporting strand 17 connected by the thread 18 is shown in Fig. 7, which will be described later Row of links 11 is hereinafter referred to as link strip 60. Other common suitable thermoplastics are designated. Polyethylene, polyamide, polyvinyl chloride and the like.

If the link strips according to Fig. 2 are to be attached to the support- Fig. 6 shows the end of the link strip, and one straps 10 are attached, so the links can see that the support strand 17 ″ from different rows of cooking 11 brought into engagement and each support strand 17 is NEN assembled, as well as the connection via a fastener tape 10 can be placed. The coupled 65 filaments 18a, in both cases some fibers from Link strips, together with the fastener tape 10, can consist of a thermoplastic material in order to The desired fusion is achieved by using a conventional double-needle sewing machine be, with the sewing stitches 19 to give tongue at the same time.

through the support strand 17 and through the support tape 10 In FIG. 7, a double needle sewing machine is guided as shown in FIG. 70 shows, with which the lateral support strands 17 of the members

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the strips are sewn onto the tape 10. the Straps 10 are continuously inserted into the sewing machine, while pre-cut link strips, formed from rows of links 11 and supporting strands 17, which are connected to one another by threads 18, are introduced discontinuously one after the other, with short spaces between the individual link strips. A continuous row of link strips emerges from the discharge side of the sewing machine the tapes 10 are sewn on at a distance by means of rows of stitches 19, as shown in FIG. 8. Around To get individual closures, you only need the straps in a place in the middle between the to cut successive link strips, as indicated by the dashed lines in FIG is. The slide and the limit stops can, as usual, before or after Cutting process can be attached.

Fig. 9 shows a modified form of a slide fastener, in which an additional cord 32 along each support strand 18 is attached. The cord serves to protect the carrying cord from abrasion and a To prevent loosening or rolling of the slide 12.

The manner in which the additional cord 32 is attached to the sewing machine is shown in FIG two cords 32 are fed into the machine at the same time as the continuous fastener tapes 10, whereby the resulting zipper strip along the inner edge of the fastener tapes at intervals by means of has two parallel rows of threads attached to rows of links. As shown in the embodiment according to FIG. 11, the cord is also located here 32 over the support strand 17 of the row of links 11 and beyond on the support tapes in their entirety Length. The cord 32 facilitates the assembly of the slide, since it is now possible to attach the slide, before the fastener tapes are cut.

Not only a composite, but also a completely thermoplastic one can be used for the supporting strand 17 Use yarn. An important advantage of using thermoplastic fibers for the Support strand is the possibility to see the support strand on thermoplastic using known welding processes To attach foil materials, whereby a sewing process is omitted. Instead of the sewing machine you can a conventional high-frequency dielectric welding machine is used to connect the link strips to the film material be used.

Claims (5)

Patent claims: 1. A method for producing a zipper, the rows of links each by means of a composed of individual threads made of textile fibers or thermoplastic material Support strand are attached to the support tape, characterized in that the threads of the support strand (17) each row of links (11) over its entire length or at individual points at intervals that correspond roughly to the desired row lengths, either if these threads are made of textile fibers exist - by impregnating with adhesives, starch, thermoplastic material, or - if these threads consist of thermoplastic material - by fusing them together are connected, whereupon the link strips in a known manner in the desired Cut to lengths and sewn onto the continuous straps with space in between or welded. 2. The method according to claim 1, characterized in that the impregnation or the thermoplastic Material of the threads consisting of textile fibers after the attachment of the link strips on the liner tapes are washed out by solvents. 3. The method according to claim 1 for the production of a zipper, the fastener straps from thermoplastic material, characterized in that the link strips, their supporting strands consist entirely or partially of thermoplastic threads, in a manner known per se the straps are connected by welding. 4. The method according to claim 1, characterized in that the associated with the supporting strand Rows of links in a manner known per se continuously through one containing the impregnating agent Bath and then passed through a drying device and then cut into pieces will. 5. The method according to one or more of the preceding claims, characterized in, that connected to the supporting strand consisting entirely or partially of thermoplastic threads Rows of links at intervals corresponding to the length of the closure by means of a heating system Printing process can be tied and then separated. Considered publications:
German patents No. 816 832, 853 282,
French Patent No. 1,125,468;
Swiss Patent No. 182 382;
U.S. Patent Nos. 2,079,563, 2,334,000, 597 049, 2,517,907, 2,396,912, 2,681,864, 2,265,353, 274,721, 2,536,262. Legacy Patents Considered:
German patents No. 1 030 154, 1 068 192,
076 055. 1 sheet of drawings © 009 678/1 12.