DE1244455B - Method of making the row of links of a coil spring zipper - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

A44b

German class: 44 al-19/42

Number:
File number:
Registration date:
Display day:

N 21052 VII a / 44 al
January 11, 1962
June 13, 1967

The invention relates to a method for producing the row of links of a coil spring slide fastener.

There are already coil spring zippers known in which the rows of links are double Have twist. To produce these rows of links, an approximately flat ribbon-shaped Profile strand wound on a cylindrical core and at the same time twisted around its longitudinal axis, which creates the desired double-twisted helix. It is also known to have thorns to be used with a cross-section that differs from the circular cross-section or tapes with a different cross-section to be provided.

The aim of the invention is the known method for producing rows of links for coil spring slide fasteners to improve so that the resulting rows of links increased considerably Have grooved areas in order in this way a significantly increased security of the out of these Zipper built up in rows of links to prevent unintentional "popping open" when the To get zipper. According to the invention, this object is achieved by the combination the following process features, namely that the profile strip first helically around a wound cylindrical core and then removed the coil spring from the core and then is pulled apart in the axial direction in the extended position, after which the so twisted Profile strips then with the opposite direction of winding on a second core with slightly larger diameter and with a rectangular cross-section is wound.

In the case of the invention, which can only be seen in the entire marked combination, so the two twists are made by successive winding on two different ones Cores generated. This ensures that an essentially uniform twist occurs during the first twist curved helical surface is created, which together with the subsequent winding on one cuboid core leads to large areas of engagement of the resulting coil springs. the large areas of engagement have the consequence that the zipper constructed from these springs does not open even with strong kinks.

It is particularly useful to use the helical rows of links, as is known per se to connect a support strand so as to provide a better way of attaching the helical spring to the To get the lanyard.

Method for making the row of links of a Coil spring zipper

Applicant:

Nippon Shinpu Kabushiki Kaisha, Tokyo

Representative:

Dr.-Ing. E. Maier, patent attorney,

Munich 22, Widenmayerstr. 5

Named as inventor:
Toshiaki Takagi, Osaka (Japan)

Claimed priority:

Japan January 12, 1961 (943)

An exemplary embodiment of the invention is explained in more detail below with reference to drawings. It shows

Fig. 1 is a perspective view of a part of a strip of starting material,

Fig. 2 is a partial side view to explain the first process step,

Fig. 3 is a partial side view showing the according to the shows intermediate product manufactured in the first process step,

Fig. 4 is a partial side view to explain the second process step,

Fig. 5 is a side view to explain the attachment the row of links at the edge of the tape,

Fig. 6 is a plan view of two coupled rows of links,

F i g. 7 shows a cross section through the coupled zipper.

The starting material is a flat, band-shaped profile strand 1 with an approximately rectangular Cross section used made of elastically deformable material, such as light metal or Plastic. The extruded profile 1 is helically wound around a cylindrical core 2, either in a clockwise or counterclockwise direction. This is shown in FIG. The helical one Profile strand 1 is then subjected to a stretching in the axial direction and results as an intermediate

709 610/34

Claims (3)

3 4 product a twisted profile strip, which are attached along the manner described above, so lie its entire length, as in Fig. 3 shown, with the supporting strands 12 and 12a parallel to one another, constant twist is provided. as shown in Fig. 7, and the two limb The twisted profile strip 3 is on a rows 8 and 8 α are by means of their Win further core 5 with slightly greater thickness than 5 manure parts 15 and 15 α in constant engagement over which the cylindrical core 2 helically supported strands. wraps. The winding direction is opposite because the two rows of links are opposite set that of the first winding process. During this second winding process, twisted winding parts 15 and 15 a are set opposite by the circumference of the core 5 arc parts 6. Accordingly, these turns are created, and the part shown in Fig. 4 engages with the product on the closure. The bending of the arch parts 6 by means of the gripping forces. To open the closure, the circumference of the core 5 is limited to only those parts A , the slider causes the links of the twisted strips wound around the core 5 to rotate in the opposite direction, so that those that are essentially parallel to the circumferential 15 are limited twisted turn parts 15 and 15 a slightly extend from the surface of the core 5. As a similar dissolve each other. bending of those parts 3 of the strip which are in the It is evident that the operation of the substantially perpendicular to the core 5, the closure differs from the usual zippers difficult or impossible to form the arches, in which the domed surfaces of the parts 6 inevitably in exactly the same geometric 20 helical springs in a plane in engagement with -spaces. are brought to each other, whereas after the The double finding formed in this way (FIG. 4) firstly has a profile strip 1 as an initial twisted one The helical spring is then removed from the core 5 to form a helically twisted one pulled and represents one of the two rows of links 8 body processed, then stretched in the axial direction The row of links 8 is attached to a carrier, at- 25, so that an intermediate product 3 arises which For example, on a flexible one with a twisted shape on the side edge over its entire length 11 of a fastener tape 10 connected, after which the product 3 in opposite Support strand 12 is wound onto a core 5 by plaiting a thread or Wickhmgssmn, Wire 13, which the twisted winding part 9 of the leading edges 4 to form arcuate parts 6 Has side surface at an angle of 90 ° with the 30. The resulting row of links has a Engaging side of the row of links 8 connects, and by contiguous, twisted, strip-shaped a thread 14 connected to the support strand 12, and at the same time the arch parts 6 form attached. an outer cylinder. In addition, since the One row of links 8 is in engagement with the arched parts 6 only at those points of the twisted other row of links 8a , whereby the two link strips are formed which run essentially parallel to rows 8 and 8a, each with opposite slopes of the peripheral surface of the core 5, and get against it. Accordingly, the starting material for the substantially perpendicular to this circumferential Both body 8 and 8 must α in the first encryption area extending members and its adjacent drive stage with opposite pitch screw continuations are not bent, are formed to be wound benförmig. 40 necessarily uniform distances or intermediate The coupling process will now be described spaces between the arch parts 6. Accordingly, the mutual engagement or in by the use of simple helical interlocking of two rows of links 8 and 8 a. In the case of winding steps a coherent link of the embodiment according to FIG. 7, the row 8 with the necessary engagement between helically wound row of links 8 and 8 a 45 clear created in a simple manner, a cross-section which is based on a square Process stage one another runs just as smoothly as with the usual inverted core 5, which has a square cross-section and screw-shaped closures. In this embodiment, however, the connection is extremely strong, since the twisted parts 10 a twisted with ver-Seitenenkanien 11 and 11 α of two straps 10 and 50 different sense of direction are bent over and interlocking with each other _{on supporting strands 12 and 12 a 15 and 15 α} . The rows of links 8 and 8 a are so attached The support strands 12 and 12 a are on the outer arranges and so connected to the supporting strands 12 and 12 a surface of the objects or parts to be connected that in the coupled state their attached and essentially flush with them, so drilled parts 15 and 15a, the extensions of 55 that the Gfiederreihen8 and 8a in closed helical rows of links 8 and 8 α or the state is completely covered on one side, twisted turn parts 9 and 9 α represent, with and only a non-protruding, inconspicuous hem of the arched parts 6 and 6 α on both sides with one another,
be engaged. _p ... The coupling of the rows of links 8 and 8 a 60 ment claims: effecting, not shown in the drawing 1. Method for producing the row of links The slide has link guide channels that are in the opposite direction of a coil spring zip, in the case of welsatz to conventional sliders on the row of links 8 chem the row of links by winding and connecting and 8 a transmit a rotary movement, so that the rotation of an approximately flat band-shaped profile Rows of links 8 are rotated by 90 ° and the 65 strand is produced, marked Winding parts 15 and 15 a on both sides in the respective interstices of the other row of links by the combination of the following procedural genes, namely that the profile strip (1) closes to grab. If the rows of links 8 and 8 a in the first helical around a cylindrical