CH361765A - Apparatus for weaving a zipper tape having a helical element - Google Patents

Description

Apparatus for Weaving a Zipper Tape Made from a Helical Element To make a zipper having continuous helical elements, the process used up to now has been to first form a tape and then; attaching one end of the spiral element to the Edge of this tape with materials such as thread, and covering the front and back of the Part where the spiral elements and the tape. touch each other with a narrow ribbon (central ribbon of Support), then to sew it with a thread towards the Upper part of the narrow ribbon covered; in other words, the ribbon, the spiral element and the narrow ribbon, i.e. three whole pieces, were sewn together to form one piece, while the placement of the elements on the tape and the sewing of the narrow tape were done separately, so that not only a complicated three-ply construction resulted, but also high labor costs and a finished product. of poor quality.

It has also been proposed, in recent years, different ways of sewing the elements: horizontally ideal for a ribbon finished with a thread, all by giving a Part a shape corresponding to a narrow ribbon, but, , it was practically impossible with such methods to avoid irregularities in the pitch of the helical element. The implementation of these processes turned out to be very complicated and was not successful because of the great disadvantages they entail.

The invention proposes to remedy these drawbacks. It relates to an apparatus for weaving a zipper tape with a micoidal element, an apparatus in which the helicoidal element is woven with a ribbon while the latter is being weaved and shaped, this apparatus being characterized in that that it comprises a pair of thread guide rods, one of which is intended to determine the position of the yarn during the weaving of the helical element with the ribbon and is connected to a cam which can rotate in accordance with the movement of the weaving. back and forth of a shuttle carrying the work, the second wire guide rod being provided towards its tip with a pin holding the work and being connected to a cam mechanism serving to bring said pin closer to the wire and to move it away in a plane normal to the wire, and a plunger mechanism for moving said pin longitudinally of the wire.

The drawing shows, by way of example, one embodiment of the apparatus according to the invention.

fig. 1 e.st a general view of this form of execution.

fig. 2 is a plan view of a mechanism of this apparatus, showing how a flexible element is tied with a ribbon while the ribbon is being weaved and shaped.

fig. 3 is a side view of the mechanism shown in FIG. 2.

Figs. <I>4 to 7a</I> show the relationship between the motion of a shuttle and the mechanism shown in FIGS. 2 and 3. The figs. 4, 4a, 6 and 6a are plan views, and figs. 5, 5a, 7 and 7a side views.

Referring now to the drawing, it is seen that a pair of helical elements 19 from a beam not shown pass over an upper roller 20 and are split by a splitting pin 22 attached to a glass bar 21 and processed. as a chain. The rotational energy is transmitted from a chain wheel 2 fixed to a main shaft 1 via a chain 3, a chain wheel 4, an intermediate shaft 5, a chain 6, wheels. chain wheel 7 and 8, a chain wheel 9 and a sprocket 10. The chain wheel 10 is attached to a camshaft 11 which is supported by a bearing 12. The rotation of cams 13, 13', 13" fixed to the camshaft 11 puts rollers 15, 15', 15" into action cooperating with said cams and obliges rods 14, 14' guiding the thread to perform an upward and downward movement and further obliges a plon - Manager 16 to execute a to-and-fro movement to give a back-and-forth movement to the rod 14'. A leaf 17 is arranged to reciprocate for each half reciprocating motion of a shuttle 18 and passes the weft on each stroke.

Referring now to Figs. 4 and 5, one sees that the shuttle 18 moves in the direction of the thread guide rods 14, 14' and when it arrives towards the first side where a helical element 19 is located, said thread guide rods 14 and 14' are lifted . Rod 14' rises to a position in which 611e cannot prevent the weft from entering thread guide portion 14" at the end of rod 14.

Figs. 4a and 5a show that when the shuttle 18 has arrived completely towards the side of the ribbon where there is a spiral element, the rod 14 is lowered and a pin 14 is carried by the end of the thread guide rod 14 ' comes out of the 14" thread guide part to grab the thread.

Figs. 6 and 7 show pin 14'a at the end of rod 14' holding a wire in the same manner as shown in FIGS. 4a and 5a as the shuttle 18 moves toward the side of the ribbon opposite the helical element.

Referring to FIGS. 6a and 7a, it is seen that when the shuttle 18 has arrived completely towards the side of the tape opposite the helical element, the thread guide rod 14' lowers and releases the weft from the pin.

In this way, the weft coming from the shuttle 18 is guided by the guide piece 14" and is woven exactly between the turns of the helical element. 14'a, determines the position so as to enable the weft to be woven exactly between the helical elements, these movements being carried out continuously in accordance with the pitch of the shuttle movement, so as to weave and weave. To produce a ribbon having a Microidal element attached thereto A guide 24 for the ribbon thus made is attached to a frame by means of a Support.

Claims (4)

CLAIM Apparatus for weaving a zipper tape having a helical element, apparatus in which the micoidal element is tied with an RTI ID="0002.0277" WI="9" HE="4" LX="1877" LY ="331"> ribbon while the latter is being woven and shaped, characterized in that it comprises a pair of yarn guide rods whose dune is intended to determine the position of the weft during the weaving of the element mi- coidal with the ribbon and is connected to a cam rotatable in accordance with the reciprocating movement of a shuttle carrying the weft, the second thread guide rod being provided towards its tip with a pin holding the weft and being connected to a cam mechanism serving to approach said pin to the wire and to 61 oign it in the wire. a plane normal to the wire, and to a plunger mechanism serving to move said pin longitudinally with respect to the wire. 1. Apparatus according to claim, characterized in that the second yarn guide rod is movable to a position in which it cannot prevent the weft from entering an outer yarn guide part. release of the first thread guide rod when the shuttle approaches the pair of thread guide rods. 2. Apparatus according to sub-claim 1, characterized in that the first wire-guide rod is movable in a position in which said pin of the second wire-guide rod emerges from the wire-guide part. at the end of the first thread guide rod to grip the thread when the shuttle comes all the way to the side of the ribbon to which the Micoidal element is attached. 3. Apparatus according to sub-claims 1 and 2, charaeteris6 in that Beule the second wire guide rod is d6plagable in a position. which the weft is released from said pin of the second thread guide rod when the shuttle has arrived completely towards the side of the tape opposite the helical element. 4. Apparatus according to claim, characterized by a leaf arranged so as to execute a to-and-fro movement during each half-to-and-fro movement of the shuttle -t. ä passes through the weft on each stroke.