US2860668A

US2860668A - Tape for slide fasteners

Info

Publication number: US2860668A
Application number: US571235A
Authority: US
Inventors: James A Hendley
Original assignee: Talon Inc
Current assignee: Talon Inc
Priority date: 1956-03-13
Filing date: 1956-03-13
Publication date: 1958-11-18
Anticipated expiration: 1975-11-18

Description

Nov. 18, 1958 J. A. HENDLEY TAPE FOR SLIDE FASTENERS Filed March 13, 1956 IN VEN

TOR

5 ,4. flfA/pm ATTOAWH M 0 Y B v 7 5 s7 00 M 4 M..m z 0 4 7 MY 7 a Vfiv 4 6 2,860,668 TAPE FOR SLIDE FASTENERS James A. Hendley, Stanley, N. C., assignor to Talon, Inc., a corporation of Pennsylvania Application March 13, 1956, Serial No. 571,235

7 Claims. (Cl. 139384) This invention relates to tapes for slide fasteners, and particularly to a new and improved woven beaded edge tape therefor.

The conventional slide fastener consists generally of a pair of beaded edge stringer tapes having a series of spaced-apart interlocking fastener elements clamped to the beaded edges thereof. Heretofore, the beaded edges on the tapes were formed by sewing a pair of cords along the tape with one disposed on either side thereof. Such a method of making a beaded edge was not only tedious but expensive. It not only necessitated a special sewing operation but required the need of special sewing machines and the other equipment for guiding the cords to the needle. It also required special handling and stocking of different cords and thread as well as tapes to match in color. Accordingly, it will be seen that the above operations added materially to the cost of manufacturing slide fasteners.

While various integrally woven beaded edge tapes have been heretofore suggested and use, they have not. been entirely satisfactory, particularly those that were made on a shuttleless or needle loom. In most of these tapes, there is usually provided two or more cords along the edge to form the head which are usually held in position by the weft threads which pass between and around the cords. In such construction, it is diflicult to maintain the cords under proper tension during the weaving operation and a beaded edge of widely varying dimensions resulted which was unsatisfactory. Also, in some constructions, the tape tended to hump or coil and did not lie fiat after the fastener elements were attached thereto.

It is the general object of the present invention to pro vide an improved integrally woven beaded edge tape for slide fasteners wherein the above mentioned disadvantages of such tapes heretofore proposed is eliminated.

It is another object of the invention to provide an improved woven beaded edge tape which is inexpensive to manufacture and to which the fastener elements can be satisfactorily clamped and which has all of the advanatent tages of a sewed tape without necessitating a separate sewing operation.

It is a further object of the invention to provide an improved integrally woven beaded edge tape wherein the bead consists preferably of four opposite twisted cords interwoven with the weft thread so as to provide a medium hard bead which is suificiently soft and has adequate bulk and, yet does not impair the flexibility of the stringer.

It is a more specific object of this invention to provide an integrally woven beaded edge tape wherein preferably four cords are interwoven with double picks of the weft thread whereby it may be easily and conveniently woven on a shuttleless or needle loom.

Various other objects and advantages of this invention will be more apparent in the course of the following specification, and will be particularly pointed out in the appended claims.

. In. the accompanying drawings, there is shown for the purpose of illustration, an embodiment which my inven tion may assume in practice.

ice.

In these drawings:

Fig. l is a plan view of a slide, fastener stringerhaving a tape construction in accordance with the present invention,

Fig. 2 is a plan view of the stringer tape before the fastener elements are attached thereto, t t

Fig. 3 is an enlarged plan view of a fragment of a stringer tape constructed in accordance with the present lnvention,

Fig. 4 is an enlarged elevational view showing :the woven beaded edge of the tape from theouter edge thereof Fig. 5 is a sectional view taken on line 55 of Fig. 3, and

Fig. 6 is a sectional view taken on line 6-6 of Fig. 3

In Fig. 1 of the drawings, there is illustrated a conventional slide fastener stringer comprising a stringer tape 2 having a beaded edge 3 arranged along one edge thereof to which there is attached a series of spaced-apart interlocking fastener elements 8. It is the conventional practice to clamp the fastener elements'to the beaded edge of the tape and the present invention is primarily concerned with the formation of this beaded edge along the stringer tape.

According to the present invention, and referring now to Figs. 3 through 6 of the drawings, the beaded edge 3' comprises a plurality of longitudinally extending, four in the present instance, relatively soft, preferably

twisted cords

4, 5, 6 and 7 with two disposed on either side of the tape. It is preferable that these cords be twisted in opposite directions for a purpose well known to those skilled in the art in order to obtain a flat and straight stringer. That is, the

cords

4 and 5 on one side of the tape are twisted in one direction and the

cords

6 and 7 on the opposite side of the tape are twisted in the opposite direction. The body or web portion of the tape is of a conventional twill design or a herringbone weave as shown. v

The body or web portion of the tape consists of a plurality of warp threads 9 interwoven with a weft or filler thread 10. The weave of each of the picks as shown, is over two andunder two of the warp threads throughout the tape. The particular weave or design of the body of the tape is not important as it constitutes no part of the present invention.

The cord 4 is held in position on one side of the tape by pairs of spaced-apart loops 12 of the weft thread and the cord 7 is held in position by the loops 13 of the same pick on the opposite side of the tape. Likewise the cord 5 is held in position on one side of the tape by the loops 14 and the cord 6 is held in position by the loops 15 of the same pick on the opposite side of the tape. j It will be noted that the

loops

12 and 14 on one side of the tape as well as the

loops

13 and 15 on the opposite side are staggered relative to each other. It will be understood that each of the

loops

12, 13, 14 and 15 is a double pick and this tape has been designed for weaving primarily in a socalled needle or shuttleless loom.

In the tape construction as above described, the tape is woven from a continuous length weft thread with a double pick passing through the warps and cords as the tape is woven. The weft thread it} passes through the web portion of the tape over one of the

cords

5 or 7 on one side of the tape, between the

cords

4 and 5, 6 and 7 to the opposite side of the tape, around the

cord

4 or 6 as the case may be, and then back between the

outer cords

4 and 6, between the

cords

5 and 7, and then back through the web between the warp threads 9. This completes one cycle of the weaving operation.

It will be noted that the loops 14 disposed around the cord 5 on one side of the tape and that the loops 13 disposed around the cord 7 on the opposite side of the tape are positioned directly next to one another while the loops 12 disposed around the cord 4 and the loops 15 disposed around the cord 6 at the oiit'er edge of the tape are spaced-apart from one another. The reason for this is" that the pick of the weft thread it) straddles the weft threads of the previous pick as the weft thread passes back between the cords. Thus, it will be seen that each double pick of the weft thread 19 passes over and-around either the two diametrically opposed cords 4 and 7' or the diametrically opposed

cords

5 and 6 and that a bead'substantially square-shaped in cross section is obtained. 1 a

'As a result of my invention, it will be seen that the filling yarn or weft thread passes through the center of the" bead and that the pressure exerted shown by the clamping action of the fastener elements thereto securely anchors" the filling yarn or weft threads therein. Thus, itresults that even though an exposed filling yarn might be accidentally cut for the clamping action of the fastener element, the fastener would retain substantially its original strength.

It will also be seen that the weave of the present invention provides'twice as many picks in the beaded edge area than other weaves heretofore suggested and used, thereby providing an outside radius which is otherwise difiicult to obtain which is another important advantage.

It will be seen further that in the weave of my invention the bead is substantially square in cross-section thereby improving the resistance to the fastener elements of becoming displaced along the bead and a more uniform bead is obtained. It is also neater in appearance and the head will not tend to roll to one or the other side of the tape which is objectionable.

' v'vhi'ch my invention may assume in practice, it will be understood that this embodiment is merely for the purpose of illustration and description, and that other forms may be devised within the scope of my invention as defined in the appended claims.

What I claim as my invention is:

1. In a tape for slide fastener stringers of the class described, a plurality of longitudinally extending warp threads, 9. continuous weft thread interwoven back and forth through and between said warp threads so as to provide a woven web, a beaded edge arranged along one edge of said tape formed by four relatively large soft cords with a pair of cords being disposed on each side of the tape, the cords being held by loops of said weft thread, each lay of the weft being a double pick and extending over and around two of the diametrically opposed cords and between all of the cords.

2. In a tape for slide fastener stringers of the class described, a plurality of longitudinally extending warp threads, a continuous weft thread interwoven back and forth through and between said warp threads so as to provide a woven web, a beaded edge arranged along one ed'geofsaid tape formed by four relatively large soft cords with a pair of cords being disposed on each side of the tape, the cords being held. in position by spacedapart double loops of said weft thread, the" double loops disposed around the inner cord of each pair being alternated relative to those disposed around the outer cord of each pair.

3; In a tape for slide fastener stringers of the class described, a plurality of longitudinally extending warp threads, a continuous weft threads interwoven back and forth through and between said warp threads so as to provide a woven web, a beaded edge arranged along one edge of said tape formed by four relatively large soft cords with a pairof cords being disposed on each side of the tape; the cords being held by loops of said weft thread, alternate double picks of the weft thread extending between the two pairs of cords and around one of the outer cords with the double picks of the weft el-Qi edge of said tape formed by four relatively l'ar a, thread in between extending between the inner and outer cords of each pair and around one of the inner cords so that each double pick of the weft thread is disposed between all of the cords at the beaded edge.

4. In a tape for slide fastener stringers of the class described, a plurality of longitudinally extending warp threads, a continuous weft thread interwoven back and forth through and between said warp threads so as to provide a woven web, a beaded edge arranged along one edge of said tape formed by four relatively large cords with a pair of cords being disposed on each side of the tape, the cords being held by loops of said weft thread, each lay of the weft thread being a double pick, alternate double picks of the weft thread extending over and around the inner cord on one side of the tape and the outer cord on the opposite side of the tape with the double picks in between extending around the outer cord on the sanie side of the tape and around the inner cord on the opposite side thereof.

5. In a tape for slide fastener stringers of the class described, a plurality of longitudinally extending warp threads, a continuous weft thread interwoven back and forth through and between said warp threads so as to provide a woven web, a beaded edge arranged along one edge of said tape formed by four relatively large soft cords with a pair of cords disposed on each side of the tape, the cordsbeing held by loops of said Weft thread, each lay of the weft thread being a double pick, the weft thread passing through the web, over and around one of the inner cords on one side of the tape, between the inner and outer cords of each pair, over and around the outer cord on the opposite side of the tape, between the two pairs of cords, and then back through the web.

6. In a tape for slide fastener stringers of the class described, a plurality of longitudinally extending warp threads, a continuous weft thread interwoven ba'clc' and forth through and between said warp threads so as to provide a woven web, a beaded edge arranged along one edge of said tape formed by four relat'ively large soft cords with a pair of cords disposed on each side" of the tape, the cords being held by loops of said weft thread, each lay of the weft thread being a doublepick, the weft thread passing over two and under two of the warp threads throughout the web of thetape, over and around one of the inner cords on one side of the tape, between the inner and outer cords of each pai -ever and around the outer cord on the opposite' side of the tape, between the two pairs of cords; and then back through the web. I H

7. In a tape for slide fastener stringers ofjthe class described, a plurality of longitudinally extending warp threads, a continuous Weft thread interwoven back and forth through and between said warp threads so as to provide a woven web, a beaded edge arranged along one as cot cords with a pair of cords being disposed on ea'ch side of the tape, the cords being held by loops of said weft thread, the weft thread passing between the two pairs of cords, around the outer cord on one side of the tape, between the outer and inner cordof each pair, around the inner cord on the opposite side of the tape, back through the web portion to the opposite edge of the tape, then back through the web portion, around the inner cordon the side opposite said last mentioned inner cord, between. the inner and outer cords of each pair, around the outer cord on the opposite side" of the tape, back through the two pairs of cords, and" then back through the web again.

References Cited in the file of this patent UNITED STATES PATENTS 2,405,902 Poux Aug.'13, '1946 FOREIGN PATENTS 500,587 Great Britain of 1948