FR2476153A1 - WIPER CLOSURE TAPE AND MANUFACTURING METHOD THEREOF - Google Patents

Abstract

A. WOVEN ZIPPER TAPE WITH ZONES OF DIFFERENT TEXTURES AND METHOD FOR MANUFACTURING THIS TAPE. B. TAPE 10 INCLUDES TWO SPACED ZONES 13, 14 OF TEXTURE 1 AND 1 SEPARATED BY AN INTERMEDIATE SEWING ZONE 15 OF TEXTURE 2 AND 2, AND THE LENGTHS OF THE CHAIN THREADS 11 IN THESE THREE ZONES ARE SENSITIVELY THE SAME. C. THANKS TO THIS ARRANGEMENT, THE INTERMEDIATE ZONE 15 IS MORE STRETCHED THAN THE SPACED ZONES 13, 14, WHICH ALLOWS ITS CONTRACTION WHILE SEWING THE RIBBON ON AN ARTICLE AVOIDING THE APPEARANCE OF UNDESIRABLE BUMPS OR RUGS ON THE CLOSURE OR ON THE ARTICLE TO WHICH THIS IS FIXED.

Description

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  The invention relates to a woven zipper tape.

  A zipper embodies two chains of coupling elements, each comprising a ribbon carrying a row

  coupling elements, and a slider capable of coupling and disengaging

  fold the rows of elements. When such closures are attached

  by sewing to an article, the parts of the ribbons which extend

  nally, and which receive the seam, tend to be gathered by the sewing operation. This gathering of the ribbons makes the rows of coupling elements engaged together, at the same time as the associated part of the article to which the closure is sewn, a corrugated shape perpendicular to the plane of the closure, which makes difficult

  the operation of the closure and harms the appearance of the article.

  One method of mitigating this problem is to create a surplus of material in the ribbon to compensate in advance for the contraction that occurs in the ribbon during sewing. For example, it has been proposed in US Pat. No. 2,796,649 to emboss a marginal zone of a

  closing tape, away from the edge supporting the coupling elements

  This lengthens this marginal area with respect to the opposite edge which carries the coupling elements. This elongation is calculated to compensate for the contraction resulting from sewing the ribbon to an article, but unfortunately has the disadvantage that the closure coupling chains become curved, or skew in their own plane, with the edge carries the coupling elements on the inside of the curve, which causes

  corollary difficulties of sewing during a mass production.

  According to a first aspect of the present invention, it relates to a zipper tape, which is of structure

  woven, and has two spaced zones of texture 1 and 1 which are separated

  by an intermediate texturizing seam zone 2 and 2, and the lengths of the warp yarns in these three zones per unit length of ribbon are substantially the same, so that the intermediate zone

  has a more relaxed texture than spaced areas.

  The middle zone may have plain armor, armor

  cross, satin armor or herringbone armor.

  According to another aspect of the invention, the subject of the invention is a method of manufacturing a woven zipper ribbon which comprises weaving the ribbon by providing two spaced zones of texture 1 and 1 separated by a intermediate sewing area of

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  texture 2 and 2, feeding the spaced zones and the intermediate zone in a proportion that is substantially the same, so as to create in the intermediate zone a construction more

  relaxed only in the spaced areas.

  Preferably, this method provides for providing substantially all the warp threads to the ribbon from a single reel beam,

  so that these warp son are the same length.

  This method may include providing, from a separate stripping beam, a thicker marginal warp wire for

  the edge of the ribbon that must support the coupling elements.

  This process may include weaving the intermediate zone

  with plain weave, cross weave, satin weave or armor

herringbone wall.

  The invention also relates to a zipper made

  from the woven zipper tapes above, or

  bricks according to the aforesaid process, and having series

  coupling elements attached along an edge of each ribbon.

  Thanks to the present invention, the high number of heating wires is

  intertwined with the weft threads in the spaced areas, compared

  The smaller number of interlacing in the intermediate zone results in a looser state of the warp threads in the intermediate zone, bearing in mind that all the warp threads in the three zones were initially substantially the same length. Thus, the value of the embossing of the warp in the intermediate area per unit length of the ribbon is higher than would be otherwise seen in an armor structure

  similar 2 and 2 having the same choice of son.

  The more relaxed state of the intermediate zone allows a

  contraction of this area along the seam path during the operation.

  seam allowance without producing undesirable bumps or undulations in the closure and associated article. Another advantage of the ribbon and closure manufactured according to the invention is that they can be processed more easily on packet dyeing machines, than the prior closures and ribbons which are produced at an angle to avoid ripples after sewing in clothes. This is because the zones spaced apart from a ribbon according to the invention allow it to withstand high voltages when wrapped in a package, without disturbing

  seriously embossing the chain of the intermediate zone.

  The invention will now be described with reference to the drawings

  attached which illustrate a non-limiting embodiment.

  Figure 1 is a partial perspective view of a zipper during sewing thereof to an article, and which is provided with a ribbon according to the invention;

  FIG. 2 is a cross-sectional view of the closing ribbon

  Figure 1; FIG. 3 is a partial plan view of the closure tape

of Figure 1.

  Referring to the drawings, there is shown a woven zipper tape 10 which has warp threads 11, eg of cotton, provided from a reel beam

  unique, and a frame 12, for example "nylon".

  The ribbon comprises two zones 13 and 14 marginal and spaced

  laterally, plain weave, which corresponds to a texture 1 and 1.

  The two zones are separated by an intermediate cross-weave seam zone, i.e., a texture 2 and 2, which determines a way "A" in which sewing will take place when the ribbon is attached to an article. Zone 13 is located near an edge 16 of the ribbon which may have a thicker and larger diameter warp 17 than other warp threads, to provide a beaded edge to support a series of elements. coupling 18, the warp

  larger diameter 17 coming from an auxiliary winding beam

  iary. Since armor 1 and 1 generally use a longer warp thread length than armor 2 and 2, warp threads in the cross armor of intermediate zone 15 will be more relaxed and will have tension. lower residual after weaving, that the warp yarns in the zones 13 and 14 for the same yarn size, the warp yarns of the three zones 13, 14 and 15 being provided in the same proportion and having the same length because they come from the same reel beam. In other words, the intermediate zone has a chain emboss value greater than the normal chain embossing value that would exist in similar cross armor.

  woven without the influence of zones 13 and 14, and may actually

  a series of low amplitude gathers 19 resulting from the allon-

  the ribbon in the intermediate zone. Instead of

  intermediate zone 15 from cross-bridged

  types of textures 2 and 2 can be used, for example an ar-

  mure canvas, satin weave or herringbone weave.

  If desired, the warp yarns of the three zones may have different specifications and / or be provided by separate staggered beams, it being understood that the warp threads of the intermediate zone 15 are more relaxed than those of the zones 13 and 14. The intermediate zone 15 may be central as shown in the drawings, but may also be made offset from the center or split into two or more intermediate zones for a corresponding number of seam lines. In the case where there are two intermediate zones, there will naturally be three zones spaced so that the two intermediate zones are separated by a common spaced zone. So,

  each intermediate zone is still located between two spaced zones.

  Because the ribbon 10 is substantially straight, as it has no biased son in its own plane, it can be easily located between molding tools, the beaded edge 16 being housed in semicircular grooves between the cavities of the mold to mold

  by injection the coupling elements 18.

  The completed coupling member chains, comprising the ribbon 10 with its series of coupling elements 18, can then be sewn to an article 10 by a seam line 21 along the "A" path. The relatively loose or relaxed armor of the intermediate zone 15, with respect to the tighter armor of the zones 13 and 14, allows greater mobility of the wires in the intermediate zone, which facilitates the passage of a needle and the sewing thread, and thus minimizes any shortening of the ribbon that otherwise

  result from any packing on itself of the ribbon during sewing.

  Any slight shortening of the ribbon along the seam line is complicated by the longer length of ribbon in the ribbon.

intermediate zone 15.

  The invention is not limited to the embodiments described

  and may include alternative embodiments.

Claims (8)

  Woven zipper tape having textured zones 1 and 1 and 2 and 2, characterized in that it comprises two spaced zones (13, 14) of texture 1 and 1 separated by an intermediate zone of oouture (15) of texture 2 and 2, and the lengths of warp threads (11) in these three areas per unit length of ribbon are substantially the same, so that the intermediate zone   has a more relaxed texture than spaced areas (13, 14).   Zipper tape according to claim 1,   characterized in that the intermediate zone (15) is in plain weave.   3. Tape for slide fastener according to claim 1,   characterized in that the intermediate zone (15) is in crossed weave.   4. Tape for slide fastener according to claim 1,   characterized in that the intermediate zone (15) is in satin weave.   Zipper tape according to claim 1,   characterized in that the intermediate zone (15) is in herringbone weave.   A method for producing a zipper tape having texture areas 1 and 1, as well as 2 and 2, characterized   in that two spaced zones (13, 14) of texture 1 and 1 are sinistrally   woven on each side of an intermediate seam zone (15) of texture 2 and 2, and the warp threads (11) of these zones are provided in substantially the same proportion, so that the intermediate zone (15) has a more relaxed texture than spaced areas (13, 14).   7. A method according to claim 6, characterized in that substantially all the warp threads (11) are provided from a single reel beam so that these warp threads have the same length. 8. Process according to claim 7, characterized in that   thicker marginal warp thread (7) is provided from a   flexible separate unroller at the edge of the ribbon to support the coupling elements.