US3765457A

US3765457A - Method of production of a zipper by weaving

Info

Publication number: US3765457A
Application number: US00133791A
Authority: US
Inventors: F Glindmeyer; W Hennenberg; K Limpens
Original assignee: William Prym Werke GmbH and Co KG
Current assignee: William Prym Werke GmbH and Co KG
Priority date: 1970-04-14
Filing date: 1971-04-14
Publication date: 1973-10-16
Anticipated expiration: 1990-10-16
Also published as: SE368966B; NL7104817A; LU62939A1; AT306659B; FR2086043B1; FR2086043A1; JPS5636923B1; DE2017739A1

Abstract

A method of the production of a slide fastener by weaving, which comprises the steps of bending over a continuous profile strand about a loop forming core within the range of the weaving point for the formation of a row of coupling members, and guiding back and forth the profile strand of synthetic material as a warp thread shedding through the weaving plane. Thereby the profile strand is guided in a cycle, at some points reversing about the loop forming core, and binding the profile strand within the range of the rearward return points by means of at least one woof thread loop.

Description

United States Patent 1191 Glindmeyer eta1.

[ Oct. 16, 1973 METHOD OF PRODUCTION OF A ZIPPER BY WEAVING [73] Assignee: Firma William Prym-Werke KG,

Stolberg, Germany 1221 Filed: Apr. 14, 1971 21 Appl. No.: 133,791

[30] Foreign Application Priority Data Apr. 14, 1970 Germany P 20 17 739.3

[52] US. Cl. 139/35, 139/116, 139/384 B, 24/205.l C

[51] Int. Cl D03d 41/00 [58] Field of Search 139/35, 46, 11, 116, 139/384 B; 24/205, 205.12, 205.15, 205.16

[56] References Cited UNITED STATES PATENTS 3,692,068 9/1972 Auer 139/]16 3/1961 Park et a1. 139/46 OTHER PUBLICATIONS 1263634 German Publication to Toelle of 5-1964.

Primary Examiner l-lenry S. .laudon I AttorneyErnest G. Montague [5 7 ABSTRACT A method of the production of a slide fastener by weaving, which comprises the steps of bending over a continuous profile strand about a loop forming core within the range of the weaving point for the formation of a row of coupling members, and guiding back and forth the profile strand of synthetic material as a warp thread shedding through the weaving plane. Therebythe profile strand is guided in a cycle, at some points reversing about the loop forming core, and binding the profile strand within the range of the rearward return points by means of at least one woof thread loop.

7 Claims, 10 Drawing Figures PATENTEDUCT 16 I975 SHEET 2 BF 3 FIQZa METHOD OF PRODUCTION OF A ZIPPER BY WEAVING The present invention relates to a method of production of a slide fastener by weaving, whereby within the range of the weaving area for the formation of a row of dome members a continuous profile strand of synthetic material is turned around a loop-forming hook and bound in a band fabric.

Woven slide fasteners, in which the windings of the rows of dome members are created by reciprocation of a weft thread consisting of synthetic material during the weaving, have the drawback, that the weaving process can be performed only with two shuttles at a comparatively low working speed.

It is a further drawback, that stops result during weaving, because empty weft spools in the shuttles must be exchanged.

In other production methods of slide fasteners firmly wound rows of dome members of threads of synthetic material are used, which during weaving of the carrying band are bound afterward to the carrying band fabric by the weft.

Prior to the weaving, particular working steps are required for the formation of the rows of dome members. Furthermore, difficulties are created, to insert the weft threads during the weaving process into the correct voids of the wound row of dome members, for which reason, complicated additional devices are required therefor.

It is finally known, to cause reciprocation of a warp thread consisting of synthetic material, between the two arms of a Y-shaped carrying band, yet after the weaving particular deformations of the wovenin thread of synthetic material is required, in order that, seen in the profile, a flat row of U-shaped dome members are obtained. The labor required for the formation of the finished rows of dome members are here performed after the weaving.

It is one object of the present invention, to provide a method of production of a slide fastener by weaving and to develop at first a weaving process for a slide fastener of the above-stated type, where the finished spatial windings of the profile strand of synthetic material are produced for the formation of the dome members in a possibly simplest, reliable and fast manner during the weaving process.

It is another object of the present invention, to provide a method of production of a slide fastener by weaving, wherein the member forming profile strand of synthetic material is guided through the weave-plane in a reciprocating manner forming several threads as a warp thread and thereby, reversing is guided in a cycle about a loop forming hook and is bound within the range of the rearward reversing positions by means of at least one weft thread loop. The member forming warp thread is disposed thereby alternately on one or the other side of the loop forming hook.

Instead of subjecting the loop forming hook to a lateral movement, the member forming warp thread should move additionally to its weaving stroke movements in a cycle move laterally outwardly.

During its alternating position on the one or the other side of the loop forming core the member forming warp thread is lowered below the weaving plane, in order to be overgripped by the weft insert.

The guidance of the member forming warp thread concerning the loop forming hook takes place in a manner of a leno weave, where the hook forms the setting thread" and the member forming warp thread the pile thread, which in relation to the loop forming hook is zig-zag-shaped and is brought in reciprocating manner from one side of the hook to the other and back again. In accordance with the present invention, it is to be added that the loop forming hook, which forms the axis of the piles after tying of the member forming warp thread, is withdrawn again completely from the woven product, so that the windings of the member forming warp thread remain and the finished row of members is created.

With the present invention, a non-objectionable woven slide fastener can be produced in a particularly simple manner. The member forming profile strand, working as a warp thread, permits high working speeds during the weaving. The warp thread can be selectively long, whereby a stopping of the weaving due to emptying of the thread storage practically does not play any significance. Since the dome members are produced directly during the weaving of the carrying bands, the latter are not only in exact adjustment to the weaving, rather are also gripped at the desired point by the warp threads, without providing therefor any particular measures and additional devices.

The cross section of the dome members results from the size and form of the hook. The weft succession and the weaving removal determine the distance between adjacent dome members.

As a further distinction relative to the known len-o weave, is to be set forth, that between the weft inserts which tie up the loops or piles of the member forming warp thread on the woven product, at least one further weft extending merely in the band woven product is introduced. Even if the introduction of the warp thread in its function as tying weft for the dome members on the one hand and merely as the weaving production weft extending in the band weaving, on the other hand,

can follow in series in a multiple number, it is advisable for the reason of cost as well as for reason of a possibly simplest control to perform these two functions of the weft thread together alternately. The weft insertion itself can take place in any of the known manners by example by means of shuttles. Suitably it is, however, to perform the weft insertion on so-called shuttle-free looms by a weft insertion needle, where from one side of the woven product the warp thread is inserted as a warp thread loop with a double thread piece, the loop end of which is inter-connected on the opposite woven edge either with previous loop ends directly or by means of a further additional thread. The interconnection of the loop ends takes place suitably on the edge of the carrying band woven product disposed opposite the row of dome members.

The above mentioned tying of the rearward reversed positions by at least one warp thread loop amounts to the fact, that a simple or multiple thread piece of the row of dome members is gripped at the points, which upper shed or lower shed. It is advisable, that in addition to the deviations-of the member forming warp thread with the part of the loop forming hook lying freely and not bound, to perform synchroniously and in a cycle deviation movements, in order to meet the movements of the member forming warp thread. Thus it would be suitable for the lowering of the stroke movement of the member forming warp thread, to lower also the loop forming hook somewhat to the weaving plane, yet even in this case the loop forming core is brought not through the weaving plane into the oppositely disposed weaving shed during the weaving, rather forms the weaving plane, which is determined by the weft insertionrneedle, the limit of its vertical movement. In some cases, it is suitable to equip the member forming warp thread at predetermined distances in particular within the range of the dome faces and/or rearward reversing positions with deformations. Also it is possible to produce thereby abutments, which set the depth of the engagement of the cooperating other row of dome members.

The present invention is directed, however, also to an apparatus for performing of the previously mentioned method where a movable thread guide and a hook is used. The present invention is characterized relative to the known structures preferably such, that in the thread guide a member forming warp thread is received and by means of the thread guide alternately on one or the other side of the hook formed as a loop forming hook is insertable into the range of the tying position. In order to obtain a non-objectionally thread performance along the loop forming hook up to the tying position, it is advisable, to equip the hook in this range with an angular arrangement.

With these and other objects in view, 'which will become apparent in the following detailed description,

- the present invention, which is shown by example only,

will be clearly understood in connection with the accompanying drawings, in which:

FIG. 1 is a partly perspective view of the weaving position range of the sliding fastener, whereby the conventional parts of the loom have-been omitted for a clearer showing while, however, the thread guide for the member forming warpthread is shown;

FIGS. 2a to 5a are schematic plan views of the weaving point of the sliding fastener in different working steps;

FIGS. 2b to 5b are schematic showings of correspending side elevations of the weavingpoint for the different previously mentioned working steps; and

FIG. 6 is a schematic working scheme for the working movement of the thread guide device for the guidance of the member forming warp thread during the different working steps in accordance with the previous Figures.

Referring to the drawings, and in particular to FIG. 1 thereof for the weaving production of the slide fastener 10 within the range of the carrying band part are provided in addition to a greater number of warp threads 11 a continuously woven-in weft thread 12, while for the formation of a row of dome members 13 a profile strand 14 of synthetic material is woven-in in the edge range of the woven product. This profile strand is guided'as member-forming warp thread 14. It performs corresponding with the working manner of the warp 11 in the section in front of the shuttle abutment position l6, the formation of a shed l7 through which by the next following shuttle insertion a further part piece of the weft thread 12 is fed through. As a weft insertion means serves here a shuttle, which is not particularly shown, as well as the weaving comb abutting the weft thread 12 is omitted. Finally also the conventional weft shafts are not shown, which by the formation of the shed 17 spread the web threads 11 into an upper warp thread shed 18 and a lower warp thread shed 19.

The operation of the individual warp threads 11 in the high position 18 or the low position 19, follows the desired weaving binding, accordingly the warp threads 11 are pulled in the weaving shafts and the latter are moved upwardly and downwardly.

The member forming warp thread 14 is not moved however up-and downwardly alone in a stroke movement 22, whereby it reaches a high position or a low position, rather it is subjected to a displacement movement 23 in form a type of a leno weave. The warp thread 14 cooperates thereby with a loop forming core 20 in the manner of a leno weave." The member forming warp thread 14 is moved from one side of the core to the other and back again in the manner of a loop thread relative to the loop forming core 20, whichperforms the function of a setting thread, reversing in a cycle from one side of the hook to the other and again reversed. This movement is produced by a particular thread guide 21 for the warp thread 14.

The thread guide v21 comprises guide sleeves 24, which perform by means of a rod arrangement, not particularly shown,-as well as the complementing excentries a vertical upward and downward movement 22 in the'direction-of the arrow shown in the drawing. In the guide sleeves 24 is displaceably mounted a guide rod 25 which performs by means of a purther, not particularly shown excentric drive, a horizontal movement 23 in the direction of the double arrow. The guide rod 25 serves as a carrier for a guide needle 26, through its guide eye 27 of which the member forming warp thread 14 is threaded through. While in a band loom a plurality of weaving positions are provided in distance from each other, on which simultaneously slide fasteners are woven, the guide rod 25 is suitably extended over the total width of the loom, by mounting the same in additional guide sleeves, whereby on each weaving position a corresponding guide needle 26 is provided for a member forming warp thread.

In the further drawings a possibility of a weaving production of a slide fastener in accordance with the present invention is more clearly disclosed with the arrangem ent of four successive working steps. In particular, from each working step a top plan view and a side elevation are shown. It is to be understood, that the present invention is not limited to this predetermined working manner. For the nomination of the individual threads and thread groups the same numerals as in the previous embodiment are used.

Referring now again to the drawings and particularly to FIGS. 2a and 2b, showing thefirst working step of the weaving process, the member forming warp thread 14 is disposed at-first to the right from the loop forming hook 20, if one looks towards the goods removing direction 28 onto the weaving point. The member forming warp thread 14 is in view of the position of its thread-guiding element (not shown) in the range of the low position 19 of the remaining warp threads. Contrary thereto is disposed the loop forming hook 20 is disposed starting from an angular arrangement 40 within the range of the shuttle abutment point 16, within the range of the high position 18 with its unbound end. After spreading of the shed 17 it comes not to the insertion of a thread part a. Since in the present case a shuttle insertion needle 29 in a loom having no shuttles is used for the warp insertion, which is to be recognized in a side elevation merely in FIG. 2b, the warp insertions occur in loop form as a double thread. The warp insertion needle 29 is inserted from the band edge equipped with rows of dome members into the shed 17, while on the member free opposite weaving edge 30 the loop ends 31 of the warp are pulled about the previous loop end, whereby at this edge 30 a row of loops is formed drawn continuously into each other.

The warp thread 14 disposed during the previously stated warp thread insert above the loop forming hook forms now in the presentwarp thread insert a loop arm 32 which is disposed above the hook 20, by the warp thread parts a overlapping the warp thread insert. By this warp insert a care is taken that the warp thread 14 is gripped and is bound to the weave. The warp thread insert exerts thus here the function of a member tie-in. Thereafter, the warp insert a is pressed to the shuttle abutment point 16 by a comb which is not shown.

During the next working step, in accordance with FIGS. 3a and 3b the warp threads 11 are spread in a different distribution to their high positions 18 and low positions 19, respectively, for the formation to the next shed 17, as it is prescribed by the weaving binding. The loop forming hook 20 is disposed unchanged still in the high position 18. Yet also the member forming warp thread 14 is now transformed by its thread guide into the high position 18 of the shed 17. In the now following warp insert b the warp thread 14 is not gripped, so that, it leads now only to a continuation of the carrying band part 15. In view of this particular function, one could characterize this warp insert b as weaving construction warp. On the member free edge 30, the loop end 31 is bound in the manner of a loop with the previous loop end 31 of the previous warp insert a, which is taken care of by a crochet needle (not shown), the appearance, function and working manner is known.

Upon abutment of the shuttle b the next working step, shown in FIGS. 4a and 4b, results. In accordance with the binding, the warp threads are spread for the formation of the shed in the high position 18 and the low position 19 in the correct distribution. Now the member forming warp thread 14 is again in the low position, while the loop forming hook 20 is disposed unchanged within the range of the high position 18. By the shuttle insert c which takes place now, the member forming warp thread 14 is again over-lapped and bound by its warp thread parts to the fabric, for which reason one could characterize this shuttle insert in its particular function as member binding shuttle. By its thread guiding element, however, the member warp thread is brought to the left side of the loop forming hook 20, as it is shown in FIG. 4a. During the warp insert the member forming warpv thread is pulled below the loop forming hook 20 into the fabric as it is indicated in FIG.

4a. A bow-shaped rearward reversing position 36 is thereby created, which is disposed below the loop forming hook 20.

In comparable manner during the first described warp insert a which could be characterized also as member tie-in warp, a corresponding rearward reversing position 33 has been created, which, however, jointly with the corresponding

binding arms

32 and 34 came to lie above the loop forming hook 20.

In the last warp insert 0 the warp thread loop, inserted as a double thread, is suspended with its end 31 with the previous loop 31 in loop form. Within the range of the row of the dome members 13 a further loop arm 35 disposed below the hook 20 is created. The pulling through of the rearward bow 36 below the loop forming hook 20 can be simplified by step wise release of the thread tension in the member warp thread 14 at this working type point. It is feasible to provide additional control devices for this movement of the member warp thread.

Upon abutment of the warp insert 0, this working step is terminated andit leads to the last working step in the present'cycle of the weaving process, which is shown more clearly in FIGS.'5a and 5b.

Corresponding with the weaving binding the warp thread of the carrying band part 15 are brought into the high position 18 and the low position 19, respectively, for the formation of the shed 17. The member warp thread 14 is disposed in the top plan view of FIG. 5a

. still on the left side of the loop forming hook 20; Its

thread guiding element brought, however, clearly shown in FIG. 5b, the warp thread 14 into the high position 18. In the shuttle insert d now, taking place now, the member forming warp thread 14 is not gripped, whereby its present function resides merely in a further weaving build up.- The loop arm 37, disposed on the row of members merely below the loop forming hook 20, is created. The loop end 31" .formed in loop form at the free edge 30 by the insert d is connected with the previous loop end 31" in form of a loop. After abutment of the weft in the next working phase the first described working step in accordance with FIGS. 2a and 2b is again repeated.

As can be ascertained, in this weaving process a row of dome members in form of a spatial meander, the rearward reversing

positions

33 and 36 being alternately above and below the loop forming hook 20, is created. In the different side views for reason of clarity of the showing, the position of these rearward bows 33 and 36 are shown in different planes, in order to render more clearly the run'of the windings. In reality the rearward reversing positions contract practically on the carrying-band plane behind the loop forming hook 20, so that the loop forming hook is surrounded by the windings of the warp thread 14 in form of a C.

The angular. formation 40 of the loop forming hook 20 is significantly within the range of a warp abutment position 16, because the formed

loops

32, 34, 35 and 37 move on the inclined hook as on a ramp by itself against the warp abutment position 16, in order to be bound there in the manner of a warp. On the side remote from the carrying band part 15 of the loop forming hook 20 the

actual engagement loops

30 and 39, causing a coupling, come to lie, which

engagement loops

30 and 39 are brought into engagement in the finished slide fastener with mirror-like inserted coupling members. The formation of dome faces in this loop part 38' and 39 can be favored by previous deformations of the warp thread 14. By weakenings of the cross section it would be further simplified to form the rearward reversing

position

33 and 36.

The working manner, described in F165. 2 to 5, of guiding thereby said profile strand in a cycle, at some the member forming warp thread 14 is shown in FIG. points reversing about said loop forming core, 6 schematically again. One recognizes a cross section binding said profile strand within the range of rearthrough the loop forming hook 20. Around the latter ward return points by means of at least one woof are shown four working points A. B. C. D, which demth d l p, and ohshate the Position of the thread guiding element moving said warp thread laterally within said cycle the member forming p thread 14 relative to the additionally to weaving stroke movements. p forming hook The Working Poiht A cone" 2. The method, as set forth in claim 1, which includes sponds with the position of the thread guiding element the step f the Working ep of FIGS- Pf and 2h T warp introducing at least one further weft thread extending thread IS disposed in the low position at the right from solely in the band fabric the hook. Thereafter its thread guiding element moves 3 ,The method as set forth in Claim 1, which includes still on the right side of hook 20, into the high position the Step of whereby the worhihg step of FIGS and 3b is providing deformations in predtermined spacings of reached. 15 waid wa rp thread within the range of dome faces. Thereafter the thread gmdmg element 18 brought to 4. The method, as set forth in claim 1, which includes the left side of the loop forming hook 20 and there lowthe Step'of ered at first into the low osition to the workin oint C whereby the conditicFns of the working st egs of h deformations.hpmdetermmed spacmgs. of FIGS. 4a and 4b are realized. Finally the member form- 20 sald warp thread wlthm the range of reversmg 'nts. mg warp thread 14 reaches, remaining on the left side pol of the forming hook 20 in the high position to the work- 2; 3 as fmh whch mch'des ing point D, which represents the working step in accordance with FIGS. 5a and 5b. Thereafter the thread holdmg a hoh'bound part of Sald loop formmg core guiding element is moved back to the working point A, 9 one Side of the weavmg Plane durmg the whereupon the working cycle repeam mg stroke movements of said warp threads.

While we have disclosed several embodiments of the The method as set forth in Claim which includes present invention it is to be understood that these emthe Step f bodiments are given by example only and not in a limit- Performing P e hoh'houhd P of Said P P formi Sense, mg core 1n its turn synchronous releasing movew l i ments within said cycle, in addition to the release 1. A method of production of a slide fastener by of Said p thfeadsweaving, co prisin h steps f 7. The method, as set forth in claim 1, which lncludes bending over back and forth a continuous profile the p of strand of synthetic material as a warp thread about owering said Warp threads alternately on one of the a loop forming core within the range of a weaving sides of said loop forming core below the weaving point for the formation of a row of coupling memplane. bets

Claims

1. A method of production of a slide fastener by weaving, comprising the steps of bending over back and forth a continuous profile strand of synthetic material as a warp thread about a loop forming core within the range of a weaving point for the formation of a row of coupling members, guiding thereby said profile strand in a cycle, at some points reversing about said loop forming core, binding said profile strand within the range of rearward return points by means of at least one woof thread loop, and moving said warp thread laterally within said cycle Additionally to weaving stroke movements.

2. The method, as set forth in claim 1, which includes the step of introducing at least one further weft thread extending solely in the band fabric.

3. The method, as set forth in claim 1, which includes the step of providing deformations in predtermined spacings of waid warp thread within the range of dome faces.

4. The method, as set forth in claim 1, which includes the step of providing deformations in predetermined spacings of said warp thread within the range of reversing points.

5. The method, as set forth in claim 1, which includes the step of holding a non-bound part of said loop forming core on one side of the weaving plane during the weaving stroke movements of said warp threads.

6. The method, as set forth in claim 1, which includes the step of performing of said non-bound part of said loop forming core in its turn synchronous releasing movements within said cycle, in addition to the release of said warp threads.

7. The method, as set forth in claim 1, which includes the step of lowering said warp threads alternately on one of the sides of said loop forming core below the weaving plane.