US2558239A

US2558239A - Slide fastener with releasing end stop

Info

Publication number: US2558239A
Application number: US36726A
Authority: US
Inventors: Disinger Claude
Original assignee: Conmar Products Corp
Current assignee: Conmar Products Corp
Priority date: 1948-07-02
Filing date: 1948-07-02
Publication date: 1951-06-26
Anticipated expiration: 1968-06-26

Description

June 26, 1951 c. DISINGER sum: FASTENER wrm RELEASING END STOP Filed July 2, 1948 FIG. 6

INVENTOR. CLAUDE D\S\NGER ATTORNEYS.

5 E r F 2 5 Patented June 26, 1951 Glaude Disinger, South Plainileld, N. 3., assignor to Conmar Products Corporation, Newark, N. L, a corporation of New Jersey Application July 2, 1948, Serial No. 36,726

The present invention relates to improvements in slide fasteners, and more particularly to slide fasteners of thequick-disassembly type.

I slide fasteners provided with a releasing endsto or so-called slip stop, the slider is stopped 'l Claims. (01. 29-205.].1)

by the slipstop when drawn with .a normal closing force. However, a strong pull draws the slider past the stop, whereupon the stringers are free to 'e separated by a quick stripping action without moving the slider back to the bottom stop. Such fasteners are called quick-disassembly or Q-D fasteners, and the primary object of my invention is to generally improve such fasteners.

Another object of the present invention is to provide a slide fastener with a single element re-' 2 enlarged scale and partly in fastener stringer having attached thereto 'th novel releasing end stop;

Fig. 5 is a view taken approximately in the plane of line 5-5 of Fig. 4; and

Fig. 6 is a fragmental plan view, drawnto an enlarged scale with the top wing of the slider removed for clarity of'illustration. Referring to the drawings, particularly Figs.

1 and 2, the slide fastener comprises stringers l2 and it each provided with spaced interlockable fastener elements It, preferably of a suit leasing end stop which stop supplies the requisite stopping function while affording simplicity of manufacture and assembly on a stringer. Still another object is to provide a releasing end stop which will maintain its requisite stopping function though subjected to long and continued use.

A further object of the invention is to provide a stop which may be assembled on a stringer without necessitating modification of the stringer, such as the removal of fastener elements in order to provide an area to which the stop may be attached.

:A further object of the invention is to provide a releasing stop which does not hinder the movement of the slider thereover when the stringers are out of engagement, that is, when theslider A still further object of. the invention is to provide a slip stop which is unobtrusive and neat in a slide fastener.

To accomplish the foregoing objects, and other more specific objects which will hereinafter appear, my invention resides in the slide fastener and slip stop elements and their relation one to another, as are hereinafter more particularly described in the following specification. The speciflcation is accompanied by drawings in which Fig. 1 is a fragmental plan view of a separable slide fastener having incorporated therewith the releasing end stop of the present invention;

Fig. 2 shows the upper endof the slide fastener with the slider moved beyond the releasing end stop;

Fig. 3 is a perspective view. drawn to an enlarged scale, of the stop .prior to assembly on the stringer;

Fig. 4 is a fragmental plan view, drawn to imable metal, and a slider is movable therealong by means of a suitable handle or so-called pull" 20. The stringers i2 and I4 comprise tapes 22 provided with beaded edges 24 about whichthe fastener elements it are clamped. The beaded tape edges 24 may be formed in any suitable manner. In the illustrated and preferred embodiment, cords are sewn upon opposite sides of the tape edge. However, if desired, a'cord may be appearance when assembled with the stringerof woven into the edge of the tape or the tape edge may be folded and the fold or folds sewn and/or adhesively united to form the beaded edge.

The slider It comprises the usual spaced top and bottom wings 26 and. 28, respectively, joined by a neck or post 30. The top wing 26 is provided with inturned rails or flanges 32 and the bottom wing 28 with inturned rails or flanges 34, which together with the neck or post 30 form the usual Y-shaped channel. Preferably, the

rails

32 and 34 are parallel to the longitudinal axis of the slider at the lower ornarrow end of the slider; that is, the portion of the slider which forms the stem of the Y-shaped channel. The "pull 20 is secured to a lug 36 provided on the top wing 26. In general, the slider may be conventional and that fact constitutes one advantage of the present invention.

The slide fastener illustrated is of the fully separable type, having the usual separable bottom stop construction, that here shown in Fig. 1 being the one disclosed in the U. S. patent to Ulrich. 2,216,794, granted October 8, 1940. The

terms top" and bottom" are here used as customary in the art, but the fastener may, of

course, be used in any position. The bottom stop includes a stud 38 clamped to the beaded edge of the stringer i2. A clip 40 clamped over the lower portion of the stud 38- provides a, socket 42 for removably receiving a pin 44 which is clamped on the beaded edge of the stringer it. As is well knownin the art, when the slider ,ll isin its lowermost position on the slide fastener and in contact with the clip 40, the pin ll may be threaded through the slider. l8 and into or section, of a slide 5 out of the socket 42. In general, the separable bottom stop may be of any desired or conventional construction.

The slide fastener is provided with a releasing end stop or so-called slip stop" S, which is usually located near the closed end of the slide fastener. Only one slip stop member is required, applied to only one stringer of the fastener. One of the stringers, in this case the stringer I2, is made longer than the other stringer l4, and is facilitating sideward disengagement of the stringer I! from the slider 18. The stringers are readily pulled apart, and the entire length of slide fastener stripped open.

Referring to Fig. 3, the slip stop S comprises a fastener element engaging portion or head 48, and a pair of spaced jaws 50 having at their extremities projections or hooks 52. This simply constructed slip stop is formed of relatively rigid material, preferably metal, and is itself inflexible.

As shown in the other figures of thedrawing, the stop S is clamped onto the stringer ll' intermediate two fastener elements It and It, with the jaws 50 gripping the cords or the thickened beaded edge 24. The elements It and I6. are near the end, and may be the uppermost two elements, as shown. The hooks 52 are disposed immediately behind the beaded edge 24. The head 8 projects outwardly from the beaded edge into the area where an opposing fastener element, designated It", on the stringer i2 will engage the head when the fastener elements on the stringers l2 and I4 are interengaged within the slider l8.

Although the slip stop S is formed of metal and is in itself inflexible and coacts with another metallic and relatively inflexible element I 8", within a slider I8 which is also relatively rigid, the present construction supplies the desired results over long and continuous use, without undue wear of the parts involved. The desired results are obtained by utilizing the resiliency, elasticity or flexibility of the beaded edge 24 of the stringer tape upon which the stop is mounted. I utilize the fastener elements on each side of the slip stop to support the portion of the beaded tape edge which is subjected to flexure, thereby supplying a resilient resistance to the passage of the slider. In this manner, the stringer upon which the slip stop is mounted does not require any special handling in manufacture, such as the removal of elements, beyond the application of the extremely simple slip stop between a pair of fastener elemerits.

The invention may be explained with reference first to Fig. of the drawing. The stop has a width W no greater than, and preferably less than, the width W of the fastener elements. The width W is therefore less than the spacing between the wings of the slider, for the fastener elements run freely through the slider. The length L of the stop is substantially less than the length L of the fastener elements. It will therefore be seen that the stop will not of itself offer provided with a conventional or permanent top any resistance to the passage of the slider, as, for example, if one stringer only were being run through the slider.

Moreover. the length of the stop on each side of the beaded edge is less than that of the adjacent fastener elements. Speciflcally, the head H of the stop is substantially shorter .than the head H of the fastener elements, and the jaw length J of the stop is less than the jaw length J of the fastener elements.

However, the head dimension 'H' is large enough so that when an opposing fastener element on the other stringer engages it within the stem portion of the slider, the beaded edge will be flexed outwardly, as shown at 2| in Fig. 6. It is important to note, however, that the combined overall lengths of the opposing fastener element IB and the stop S (that is, the sum of L and L) is not greater than, and preferably less than, the width of the stem portion of the slider channel, this being indicated in Fig. 6 bythe space or clearance 54 in Fig. 6. Thus it is solely the resistance to flexing of the beaded edge 24, as supported by the adjacent fastener elements it and I6, that resists passage of the slider, and it is the subsequent flexing of the beaded edge to the position 24 which permits passage of the slider when the slider is subjected to a greater than normal pull. When the slider is pulled with only normal force the elements it" and the stop S engage one another and come to a stop just before entering the stem of the slider, the point of entry being indicated at 56 in Fig. 6.

The fastener elements is and IS on each side of the stop S act to support the short beaded edge portion 24' at both ends thereof. In this way the requisite resistance to the passage of the slider is obtained while affording the resilience which enables the element It" and stop 6 to be pulled into the stem of the slider channel, or in other words, to permit-the slider to be pulled past the stop when a greater than normal force is exerted upon the slider. The beaded tape edge portion 24' thereafter will return to its normal position, as shown in Fig. 4, because of the inherent resilience of the textile materials of which the beaded tape edge is formed.

It is within the purview of the invention to assemble the novel releasing slip stop on either one of the two stringers. If, instead of stringer M the stop is attached to stringer I2, the slider would not be restrained in the slightest amount in its return movement to the bottom of the fastener after the slider has been moved upward beyond the stop S to the top stop 48, as shown in Fig. 2.

The thickness T (Fig. 3) of the stop S is limited solely by the distance between successive fastener elements. As a practical matter for production purposes, a thickness is selected which will permit the stop to be applied intermediate the fastener elements without hindrance from the fastener element head or projection. Otherwise, the stringer would require convex flexing at this area to enable the fastener element projection to be bypassed without interference. V

While the releasing end stop of the present invention has been described in conjunction with a slide fastener of the fully separable type, it is utilizable with a separable fastener having a bottom stop which is not fully separable, such as disclosed in the pending application, Serial No. 613,890, flied August 1, 1945, David Rabinow and Otto J. Moehler, having the same assignee.

It is believed that the construction, method of assaaso to only a single stringer, is needed, and it may be applied to eitherstringer. It maintains its stopping function even after long continued use.

'It will be apparent that while I have shown and described my invention in a preferred form, changes may be made in'the structure disclosed,

without departing from the spirit of the'mvefi tion, as sought to be defined in the ms I claim:

1. A quick'diassembly slide fastener comprisfollowing terlockabl'e fastener elements with jaws clamped around the beaded edge of a tape, a slider ha'ving a Y-shaped channel, and a releasing end stop ing a pair of stringers each having spaced interlockable fastener elements attached to a beaded edge of a tape, a slider having a Y shaped channel, and a releasing end stop, the stop being attached to the beaded edge of one stringer intermediate a pair of fastener elements, said stop having a portion thereof extending beyond the beaded edge of the stringer sufliciently for engagement with an opposing fastener ele- 'ment on the other stringer, said stop being no greater in width than the height of the slider channel so that it ofl'ers no'resistance to the passage of the slider except when an opposing fastener element on the other stringer is in engagement therewith within the stem portion of the slider channel, said opposing fastener element and stop having a combined overall length less than the width of the stem portion of the slider channel, but the engagement of said opposing fastener element with the stop causing the beaded edge upon which the stop is mounted to be flexed outwardly and to thereby provide resilient resistance to the passage of the slider when a normal force is applied, while permitting the slider topass the stop upon the application of a greater than normal force.

2. A quick disassembly slide fastener as delined in claim 1, wherein the fastener elements are of metal and the stop is a relatively solid, rigid, inflexible, metallic member.

' 3. A quick-disassembly'slide fastener comprising a pair of stringers, each having spaced interlockable fastener elements with jaws clamped around the beaded edge of a tape, a slider having a Y-shaped channel, and a releasing end stop comprising a head and a pair of jaws, said jaws being clamped around the beaded edge of a tape, said stop being attached intermediate a pair of adjacent fastener elements on one stringer, said stop being no greater in-width than the adjacent fastener elements, and said stop having a length on each side of the beaded edge less than the length of the adjacent fastener elements, said stop offering no resistance to the passage of I the slider except when an'opposing fastener element on the other stringer is in engagement therewith within the stem portion of the slider channel, the length of the head of said stop being such as to then flex the beaded edge outwardly, the length of the jaws ofsaid stop being less than the length of the jaws of the adjacent fastener elements to permit said flexing.

4. A quick-disassembly slide fastener comprisinga pair of stringers, each having spaced incomprising a head and a pair of jaws, said jaws being clamped around the beaded edge of a tape. said stop being attached intermediate a pair of adjacent fastener elements on one stringer, said stop being no greater in width than the adjacent fastener elements, and said stop having a length on each side of the beaded edge less than the length of the adjacent fastener elements, said stop offering no resistance to the passage of the slider except when an opposingfastener element on the. other-stringer is in engagement therewith within the stem portion of the slider channel, the length of the head of said stop being such as to then flex the beaded edge outwardly,

the combined overall length of the opposing fastener element and the stop being less than the width of the stem portion of the slider channel.

5. A quick-disassembly slide fastener compris ing a pair of stringers, each having spaced interlockable fastener elements with jaws clamped around the beaded edge of a tape, a slider having a Y-shaped channel, and a releasing .end stop having jaws clamped around the beaded edge of Y a tape, said stop being thinner than the space between adjacent fastener elements and being attached intermediate 'a pair of adjacent fastener elements on one stringer, said stop being no greater in width than the adjacent fastener elements, .and said stop having a length on each side of the beaded edge less than the length of the adjacent fastener elements, said stop offering no resistance to the passage of the slider except when an opposing fastener element on the other stringer is in engagement therewith within the stem portion of the slider channel, the length Of the head of said stop being such as to then flex the beaded edge outwardly, the length of the jaws of said stop being less than the length of the jaws of the adjacentfastener elements to permit said flexing, the combined overall length of the opposing fastener element and the stop being no greater than the width of. the stem portion of the slider channel, whereby the slider is arrested when pulled with a normal force, but the beaded edge is flexed to permit passage of the slider when pulled with a greater than normal force.

6. A releasing end stop for a quick-disassembly slide fastener comprising a pair of stringers,

each having spaced interlockable fastener ele-' ments with jaws clamped around the beaded edge of a tape, and a slider having a Y-shaped channel, said releasing end stop having jaws adapted to be clamped around the beaded edge of a' tape,

said stop being thinner than the space between adjacent fastener elements and adapted to be attached intermediate a pair.of.adjacent fastener elements on one stringer, said stop being no greater in width than the adjacent fastener elements, and said stop having a length less than the length of the adjacent fastener elements, said stop of itself offering no resistance to passage of the slider, the length of the head of said stop being greater than the clearance which normally exists between fastener elements and the beaded plus the length of a fastener element is less than the width of the stem portion of the slider channel.

7. A quick disassembly slide fastener comprisin a pair of stringers each having spaced interlockable fastener elements attached to a beaded edge of a tape, a slider having a Y-shaped channel, and a releasing end stop, said stop compris- 1118 a head and a pair of laws, said jaws being clamped upon the beaded edge of the stringer intermediate a pair of fastener elements with said head projecting into the area of fastener element engagement for engagement with an opposing fastener element on the other stringer, the length of the Jaws of the end stop being less than the length of the Jaws of the adjacent fastener elements, said stop being so dimensioned and tormed that it offers no resistance to the passage of the slider except when an opposing fastener element on the other stringer'is in engagement therewith within the stem portion of the slider channel, said opposing fastener element and stop having sage of the slider when a normal force is aD- plied, while permitting the slider to pass the stop ifipon the application of a greater than normal orce.

QLAUDE DISINGER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,422,091 Gould June 10, 1947 20 2,422,093 Griflln June 10, 1947 2,441,007 Carlile May 4, 1948