GB2146667A

GB2146667A - Heading tapes

Info

Publication number: GB2146667A
Application number: GB08324741A
Authority: GB
Inventors: Ottokar Tiltscher
Original assignee: Tiltscher & Son Ltd O
Current assignee: Tiltscher & Son Ltd O
Priority date: 1983-09-15
Filing date: 1983-09-15
Publication date: 1985-04-24
Also published as: GB8324741D0; GB2146667B

Abstract

A woven curtain lining heading tape 14 has weft threads 12 which, at predetermined locations spaced apart along the length of the tape 14, do not extend fully across the tape so that at these locations a bunch 20 of warp threads, adjacent to one edge of the tape, is not interwoven with the weft threads but is left floating to provide a loop. One of the bunch 20 of warp threads may be a different colour or shade from the remainder. <IMAGE>

Description

SPECIFICATION Heading Tapes The invention relates to heading tapes and particularly to heading tapes for attachment to curtain linings. A curtain lining heading tape comprises a length of tape which can be sewn to, or manufactured integrally with, the upper edge of a curtain lining. The tape has one or more drawstrings which can be tightened to pleat the lining and it also has an additional string woven into its upper edge. This additional string is not woven in at certain evenly spaced-apart locations in order to provide loops for use in attaching the curtain lining to the hooks of a curtain with which the lining is to be used.

Because the additional string, in order to support the weight of the lining, is thicker than the yarn used to weave the tape, the string remains relatively straight and is not therefore very well frictionally gripped by the weft threads of the tape. This has the effect that when load is applied to the loops, on hanging up of the curtain lining, the additional string slips over the weft threads and the loops get longer, so that the curtain lining drops from its desired position.

We have developed a curtain lining heading tape which is not subject to this problem.

Accordingly the invention provides a method of weaving a curtain lining heading tape in which the weft threads, at predetermined locations spaced-apart along the length of the tape, are arranged not to extend across the full width of the tape, so that at each of said locations, a bunch of warp threads, adjacent to one edge of the tape, are not interwoven with the weft threads but are left floating to provide a loop. We have discovered that a bunch of such warp threads is capable of bearing the load of a curtain lining and since the warp threads are thoroughly interwoven with the weft threads inbetween the said locations, there is virtually no tendency for the war threads to slip over the weft threads and the loops formed by the bunches of warp threads do not tend to get significantly longer under loed.

Preferably the said bunches of warp threads are each left floating by moving healds from a first position, in which the bunch of warp threads are shed and are hence interwoven with the weft threads, to a second position in which the bunch of warp threads are not shed, and hence are not woven in.

Preferably at least one of the said bunch of warp threads contrasts visually with other threads of the tape, for example by being a different colour or shade, to facilitate visual location of the loops, and hence facilitate insertion of curtain hooks.

Preferably each floating portion extends for a piurality of picks, for example six to ten picks.

The invention includes a curtain lining heading tape when manufactured by the method according to the invention.

It is preferred that the tape is woven separately from a curtain lining but the invention includes a curtain lining heading tape which is woven integrally with a curtain lining.

By way of example, a specific embodiment of the invention will now be described, with reference to the accompanying drawings, in which: Figure 1 is a diagrammatic perspective view of the weaving of an embodiment of curtain lining heading tape according to the invention, at a moment when the warp threads are all being woven in; Figure 2 is a view similar to Fig. 1 but at a moment when a bunch of warp threads are being left floating; and Figure 3 is a diagrammatic view of a portion of the curtain lining heading tape according to the invention.

The curtain lining heading tape according to this embodiment of the invention is woven on a conventional weaving machine in which warp threads 10 pass through a shedding area 11 where they are interwoven with weft threads 1 2 by passing a latched needle 1 3 back and forth through the shed. The weaving operation produces a closely woven tape 14 about an inch in width.

To facilitate an understanding of the invention the warp and weft threads are shown as being spaced much further apart than they would be in practice, in the foreground of Fig.

1.

Movements of the warp threads during the shedding operation are controlled by heald wires 1 5. In order to maintain the foreground edge of the woven tape in position when the needle 1 3 puils the weft thread back across the shed a hool < member 1 6 is inserted.

In a conventional weaving operation the hook member 1 6 would be inserted adjacent the very edge warp thread. In the method according to this ivention however, the hook member is inserted between the eighth and ninth warp threads. 'Ale have found that this does not have any adverse effect on the maintenance of the position of the foreground edge of the tape.

For a substantial part of the weaving operation, weaving is performed conventionally as shown in Fig. 1. In other words all the warp threads are shed as shown. In other words alternate warp threads are raised and lowered by appropriate operation of the heald wires 1 5. Thus the weft threads are interwoven with all the warp threads.

At predetermined intervals however, the heald wires of the first four warp threads, instead of being moved to shed the threads as shown in Fig. 1, are all placed in the same position as shown in Fig. 2, so that when the weft threads are moved back and forth through the shed by the needle 1 3 they are not interwoven with the first four warp threads.

The operation as shown in Fig. 2 is carried out for some six to ten picks and this process is repeated at intervals. The effect of this is to produce a tape a portion of which is shown in Fig. 3. The majority of the surface of the tape 1 7 is conventionally woven and two drawstrings 1 8 are woven into the tape in a conventional manner. When the drawstrings are tightened, the tape will pleat along the dotted lines 1 9. It will be seen that the weaving operation has left bunches 20 of floating warp threads, each bunch being positioned to coincide with one of the pleat lines 1 9. Each bunch of warp threads effectively provides a strong loop through which the curtain hook of a curtain can be passed. The bunch of threads is thoroughly interwoven with the weft threads it between the floating regions and there is virtually no tendency for the loops formed by each bunch to get longer under load. It can be seen that at least one of the warp threads left floating is of a darker shade. This makes the bunches of floating threads more visually prominent and hence easier to find when inserting curtain hooks.

The invention is not restricted to the details of the foregoing example.

Claims

1. A method of weaving a curtain lining heading tape in which the weft threads, at predetermined locations spaced-apart along the length of the tape, are arranged not to extend across the full width of the tape, so that at each of said locations, a bunch of warp threads, adjacent to one edge of the tape, are not interwoven with the weft threads but are left floating to provide a loop.

2. A method of weaving as claimed in claim 1, in which the said bunches of warp threads are each left floating by moving he alds from a first position, in which the bunch of warp threads are shed and are hence interwoven with the weft threads, to a second position in which the bunch of warp threads are not shed, and hence are not woven in.

3. A method of weaving as claimed in any one of the preceding claims, in which at least one of the said bunch of warp threads contrasts visually with other threads of the tape.

4. A method of weaving as claimed in claim 3, in which the said warp threads is a different colour or shade.

5. A method of weaving as claimed in any one of the preceding claims, in which each floating portion extends for a plurality of picks.

6. A method of weaving as claimed in claim 5, in which each floating portion extends for six to ten picks.

7. A method of weaving a curtain lining heading tape substantially as herein described, with reference to the accompanying drawings.

8. A curtain lining heading tape when manufactured by a method as claimed in any one of the preceding claims.

9. A curtain lining heading tape when manufactured by a method as claimed in any one of claims 1 to 7, in which the curtain lining heading tape is woven integrally with a curtain lining.