US3532134A

US3532134A - Method of weaving and a fabric woven according to this method of weaving

Info

Publication number: US3532134A
Application number: US757038A
Authority: US
Inventors: Lambertus Te Strake
Original assignee: Strake Maschf Nv
Current assignee: MAS FAB L TE STRAKE NV
Priority date: 1967-09-20
Filing date: 1968-09-03
Publication date: 1970-10-06
Anticipated expiration: 1987-10-06
Also published as: NL6712856A; CH480466A; BE720238A; GB1246118A; FR1583134A; DE1785378A1

Description

United States Patent Inventor Lambertus 1e Strake, Deurne, Netherlands Appl. No. 757,038

Filed Sept. 3, 1968 Patented Oct. 6, 1970 Priority Sept. 20, 1967,

Netherlands 6712856 METHOD OF WEAVING AND A FABRIC WOVEN ACCORDING TO THIS METHOD OF WEAVING 1 Claim, 3 Drawing Figs.

U.S. Cl 139/116, 139/127, 139/383 Int. Cl D03d 49/50, D03d 23/00 Field ofSearch .Q 139/116, 122, 122(W), 127, 127(P), 383

References Cited UNITED STATES PATENTS Hunt 139/383 2,795,244 6/1957 Shimwell 139/383 2,816,577 12/1957 Shimwell 139/383X 3,303,857 2/1967 Scheefel 139/127 FOREIGN PATENTS 954,147 4/1964 Great Britain... 139/12711) 1,042,867 9/1966 Great Britain 139/122 Primary Examiner.lames Kee Chi AttorneyMarshall & Yeasting ABSTRACT: In this method, first one and then the other leg of each of a plurality of successive hairpin-shaped wefts are picked into a shed by jet action of a fluid, and the shed is changed between successive picks. With each pick, at least two weft threads are introduced simultaneously from one end of the shed, so that every hairpin-shaped weft introduced from that end of the shed consists of a hairpin-shaped sheaf of at least two threads, while every hairpin-shaped weftintroduced from the other end of the shed consists of a single thread.

The invention relates to a method of weaving to provide arbitrary interlacing.

The invention relates also to a fabric woven with the method according to the invention.

In weaving of fabrics heavy wefts are used next to thin wefts in order to obtain a visual effect. After a number of comparatively thin wefts have been interlaced into the cloth a heavy or thick effect thread is interlaced.

In order to obtain this result, weaving machines operating with shuttles have been provided with a relay box in order to replace a shuttle having a thin thread, after a number of picks, by a shuttle provided with a thick effect thread. In a loom operating with a gripper shuttle for the weft a thread presenting device is controlled in such a manner that the gripper shuttle can pick up a certain kind of a weft and draw this weft into the shed when one kind of a weft is to alternate with another kind of weft. Stationary thread packages are situated in such weaving machines and each package carries a certain kind of thread.

SUMMARY OF THE INVENTION When use is made of weaving machines in which wefts are drawn from stationary thread packages and in which the wefts are inserted into the shed by means of jet action of a fluid, an especial visual effect can be given to the fabric without the provision of special measures for changing the kind of weft. This can be attained with a new method in which according to the invention two or more wefts are inserted in the open shed and are interlaced with the warp threads. In a further application of this method it is possible to insert two or more wefts simultaneously in the shape of a sheaf into the open shed. In developing the method according to the invention it has been found that a sheaf of threads can be easily conveyed through a device for preparing a weft and through a weft inserting device as used in such kinds of weaving machines. In an especial application of the method according to the invention, after the insertion of two or more wefts in the same opening of the shed, one or more single wefts are inserted after the shed has been changed.

In performing the method according to the invention a weaving machine in which the wefts are inserted by means of jet action of a fluid need not be provided with special means when the method according to the invention is performed in such a manner that two or more wefts which are to be inserted into the shed in the shape of a sheaf .and simultaneously are to be interlaced with the warp threads are inserted from one end of the shed, whereas the single wefts which are separately interlaced are inserted from the opposite end of the shed. Depending on the manner of presenting the wefts the method of weaving according to the invention can be used in weaving machines in which the wefts are to be inserted into the shed by means of a gripper shuttle. In this case some provisions are to be made in the presenting device for the weft.

A variation in the pattern of the visual effect can be also performed with the method of weaving according to the invention in which after the insertion of two or more wefts which are simultaneously interlaced with the warp, again two or more wefts are inserted after the shed has been changed, and the last two or more wefts are simultaneously interlaced with the warp thread.

BRIEF DESCRIPTION OF THE DRAWINGS three wefts each.

FIG. 1 is a diagram showing interlacing of a single-straight fabric in which sheafs of two simultaneously interlaced wefts have been inserted;

. 2 is an enlarged plan view of the fabric shown in the diagram of FIG. 1, and

FIG. 3 is a similar diagram of interlacing of a single straight fabric according to FIG. 1, however, provided with sheafs of DESCRIPTION OF THE PREFERRED EMBODIMENTS A single straight interlacing has been chosen in the diagrams of the drawing, however, the methods of weaving can be used in any known kind of weave.

Use has been made of two groups of warp threads in the embodiment shown in FIG. 1, consisting in an odd chain 1 and an even chain 2. The wefts have been formed by single wefts 3 and sheafedwefts 4. In the diagram according to FIG. 1 the sheafed wefts consist in separate weft threads 4and 4". In the embodiment of the fabric shown in FIG. 2 the wefts have been interlaced into the cloth in the shape of'a hairpin. Such cloth is manufactured on weaving machines in which the wefts have been drawn from stationary thread packages either 'by means of a gripper shuttle or by means of a device for weft insertion by means of jet action of a fluid. This kind of weaving in which the wefts have the shape of a hairpin is generally known. Each hairpin-

shaped weft

3 and 4 consists in a leg A or A, which has been inserted into the shed and interlaced into the cloth first and a leg 8;, or B. which is to be inserted after a leg of another weft has been inserted into the shed from the opposite end thereof and has been interlaced in the cloth. Further, after the legs 8;, and B of these wefts are inserted and after interlacing in the cloth new wefts are inserted beginning with the leg A; or A...

Instead of a sheaf of two wefts 4"and 4sheafs can be provided comprising more than two wefts. In the weaving diagram according to FIG. 3 sheafs of three wefts 4', 4" and 4" have been provided. Sheafs comprising a larger number of wefts can be provided also.

The method of weaving according to the inventioncan be used in weaving machines provided with a device for weft insertion by means of jet action of a fluid. In spite of the complicated path of the thread which is drawn from the stationary thread packages through such a known device no special provisions have been made as the threads after drawing them from the thread packages will stick together and will easily run through the device after which they can be inserted into the shed.

I claim:

1.A method of weaving to provide arbitrary interlacing of weft threads, comprising the steps of picking into a shed first one and then the other leg of each of a plurality of successive hairpin-shaped wefts by jet action of a fluid, the legs of some hairpin-shaped wefts being picked into the shed from one end and the legs of other hairpin-shaped wefts being picked into the shed from the other end, while the picks from one end of the shed alternate with the picks from the other end of the shed, the shed being changed between successive picks, wherein the improvement comprises the steps of:

a. introducing at least two weft threads simultaneously in at least some of the picks from one end of the shed, so that at least some of the hairpin-shaped wefts introduced from that end of the shed consist of a hairpin-shaped sheaf of at least two threads; and

b. introducing only one weft thread in each of the picks from the other end of the shed, so that all of the hairpinshaped wefts introduced from that end of the shed consist of a single thread, thus producing a rippled fabric.