US1985852A - Elastic webbing - Google Patents

Description

s. F. oNAN-r ELASTIC WEBBING Dec. 25, 1934.

Fired Jan. 27, 1934 Patented- Dec.` 1934 lUNI/TED STATES PATENT OFFICE United Elastic Corporation,

Easthampton,

Mala., a corporation of Massachusetts Application January 27, 1934, serial No. '108,623

s Claims. (ci. 139-422) This invention relates to elastic webbings. It aims to devise aproduct of this character suitable for bindings, elastic inserts in garments,l and various other uses in which transverse elasticity is required instead of the usual longitudinal elasticity.

The nature of the inventionwill be readily understood from the following description when lread in connection with the accompanying drawing, and the novel features will be particularly pointed` out in the appended claims.

In the drawing,

Figure l is a plan view oi' a short length oi webbing embodying this invention, the upper portion of this length of webbing being shown in a `stretched condition; and

Fig. 2 is a diagrammatic view illustrating the construction of a portion of the web shown in F18. 1.

The web shown is composed chiefly of thread or yarn made of any of the common textile ilbers, the size and character of such thread or yarn depending upon the nature and requirements of the goods. It includes warp and illling threads and comprises a central, loosely woven section 2 with much firmer selvage edged marginal portions 3-3 atopposite edges of said central section.

Extending back and forth from one. edge to the other of the section 2 is a rubber thread or cord 4, the size o! which also will depend upon the nature of the goods and the uses to which it is to be put. Usually this thread is composed of one or more strands 'of rubber with a yarn or thread cover wound around it, thewinding operation being performed while the rubber is elongated somewhat so that an initial tension is maintained continuously on the rubber strand or strands. The greater part oi' the rubber in the 40 goods consists of the lengths which extend transversely of the web, and which are put in under some tension during the weaving of the goods, the threads in the loosely woven section being spaced apart during this operation so that when the waving operation has been completed and the elastic thread 4 is allowed to contract, it will substantially reduce the overall width of the web. These nllingwise lengths are woven into the goods or are anchored in the weave at relatively short intervals so that the weftwise contraction or the goods results in puckering or gathering the loose'- ly woven section 2. Y

'I'hese transverse lengths of rubber thread are connected at their ends by short lengths 5 of the same rubber thread 4, and each of these short lengths is locked into the weave at very frequent intervals between adjacent weftwise lengths so that the presence of any loose loops is denitely avoided. Usually these goods have no substantial degree of longitudinal elasticity so thatthe short 5 sections 5 simply serve to connect the transverse lengths of rubber thread but do not impart elasticity to the portions ci' the fabric in which they are located.

Such a fabric can be manufactured in several ways and in a wide variety of looms. A convenient procedure, however, consists in making the web in a narrow-ware loom of the double shuttle type, one shuttle, say the upper one, carrying the rubber thread 4, while the lower one carries the ilbrous illling. The warp threads W are arranged in two sheds with all of the warp threads in the margins 3-3 Working in the lower shed only, and the warp threads W in the section 2 normally working only in this shed. Two special warps W'-W' work through both sheds. The shuttles are shot simultaneously in opposite directions through the sheds. With such an arrangement a pick or rubber illling can be inserted at any desired point, after which the loom makes several picks before another pick or rubber filling is put in. During these intermediate picks the upper shuttle simply reciprocates idly, but the rubber thread is intertwined with one or the special warps W', as illustrated in Fig. 2, and thus is locked securely into the weave at closely adjacent points.

Such a fabric finds a wide use as a binding material around the edges of cushions, slip covers for upholstery, as an insertion in garments to give elasticity to certain portions of them, and for many other purposes.

While I have herein shown and described a preferred embodiment of my invention ,and a typical method of manufacture, it will be understood that the goods may be made by other methods and that the invention may be embodied in other forms without departing from the spirit or scope thereof. For example, elastic warps may be included with the brous warps, 45 ii' desired. to give the fabric lengthwise, as well as transverse, elasticity.

Having thus described my invention, what I desire to claim as new is:

1. An elastic web comprising brous warp and lling threads interwoven with each other to form a loosely Woven section of web, and a rubber thread secured in the weave of said section and having lengths extending lling-wise of the goods, the ends of said lengths being connected together by shorter lengths of the same rubber thread disposed warp-wise and intertwined with a warp thread and thereby locked into the weave at intermediate points between said iilling-wise lengths, said rubber thread serving to impart lling-wise elasticity to the web.

2. An elastic web comprising ilbrous warp and lling threads interwoven with each other to form a loosely woven central section with more closely woven selvage edged margins at opposite sides of said loosely woven section, and a rubber thread secured in the weave of said central section and having lengths extending filling-wise of the goods from substantially one edge to the other of said central section, the ends of said lengths being connected together by shorter sections oI the same rubber thread disposed warpwise of the goods, and certain of said warp threads and said shorter sections of rubber thread being intertwined with each other at points between said illing-wise lengths to lock said short sections into the weave.

3. An elastic web comprising fibrous warp and lling threads interwoven with each other to form a loosely woven central section with more closely woven selvage edged margins at opposite sides of said loosely Woven section, and a rubber thread secured in the weave of said central section and having lengths extending filling-wise of the goods, the ends of said lengths being connected together by shorter sections of the same rubber thread disposed warp-wise and located at approximately opposite edges of said loosely woven central section, said short warpwise sections of rubber thread being intertwined with a warp thread and thereby locked into the weave at points between said iilling-wise lengths, and said rubber thread serving to impart filling-Wise elasticity to the web but the web being relatively non-elastic in the direction of its warp.

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