US2618828A

US2618828A - Slide fastener with releasing end stop

Info

Publication number: US2618828A
Application number: US29837A
Authority: US
Inventors: Otto J Moehler
Original assignee: Conmar Products Corp
Current assignee: Conmar Products Corp
Priority date: 1948-05-28
Filing date: 1948-05-28
Publication date: 1952-11-25
Anticipated expiration: 1969-11-25

Description

Nov. 25, 1952 o. J. MOEHLER SLIDE FASTENER WITH RELEASING END STOP 2 SHEETS-SHEET 1 Filed May 23, 1948 INVENTOR. GTTO J. MOEHLEE BY ATTORNEYS.

Nov. 25, 1952 Filed May 28, 1948 o.- J. MOEHLER 2,618,828

SLIDE FASTENER WITH RELEASING END STOP 2 SHEETS-SHEET 2 4 so i9 @F'IELII l6 INVENTOR.

52 OTTO at MOEHLEE F IE. 7

ATTORNEYS.

Patented Nov. 25, 1952 SLIDE FASTENER WITH RELEASING END STOP Otto J. Moehler, Newark, N. J., assignor to (Junmar Products Corporation, Newark, N. L, a corporation of New Jersey Application May 28, 1948, Serial N 0. 29,837

14 Claims.

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

In slide fasteners provided with a releasing end stop or so-called slip stop, the slider is stopped by the slip stop when drawn with a normal closing force. However, a strong pull draws the slider past the stop, whereupon the stringers are free to be 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 releasing 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 the slider is moving on only one stringer. This permits the slip stop to be used on either stringer of the slide fastener.

A still further object of the invention is to provide a slip stop which is unobtrusive and neat in appearance when assembled with the stringer of 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 specification is accompanied by drawings in which:

Fig. 1 is a plan view of a separable slide fastener embodying the principles of the present invention;

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

Fig. 3 is a plan view, drawn to enlarged scale,

2 of a blank from which the releasing end stop may be formed;

Fig. 4 is a perspective view of the stop prior to assembly with a stringer;

Fig. 5 is a section taken approximately in the plane of line 5-5 of Fig. 2;

Fig. 6 is a fragmental plan view of the fastener. with the top wing of the slider removed for the purpose of clarity in illustration, showing the releasing end stop as it begins to arrest movement of the slider.

Fig. 7 is a similar view, but after a slight further movement of the slider;

Fig. 8 is a transverse cross-section, taken approximately in the plane of line 8-8 of Fig. '7, but showing both wings of the slider before and after expansion;

Fig. 9 is a longitudinal view, partly in crosssection, taken approximately in the plane of line 9i] of Fig. 7, but showing both wings of the slider before and after expansion;

Fig. 10 is a fragmental plan view of a stringer having secured thereto a modified form of the releasing end stop; and

Fig. 11 is a perspective view of the modified form of releasing end stop, drawn to enlarged scale.

Referring to the drawings, particularly Figs. 1 and 2, the slide fastener comprises stringers I 2 and I4 each provided with spaced interlockable fastener elements It, and a slider I8 movable therealong by means of a suitable handle or so-called pull 2D. The stringers l2 and I4 comprise tapes 22 provided with beaded edges 24 about which the fastener element I6 are clamped. The slider I8 (Figs. 8 and 9) comprises the usual spaced top and bottom Wings 25 and 28, respectively, joined by a neck or post 30. The slider has the usual Y-shaped channel, best shown in Figs. 6 and '7 of the drawing, and under sufficient force the sides or

wings

26 and 28 of the slider are slightly resiliently separable at their free ends or stem of the Y, as is schematically indicated by the change from the broken line positions to the solid line positions in Figs. 8 and 9 of the drawing. The amount of change has been exaggerated in the drawing for clarity.

Reverting to Figs. 1 and 2, the slide fastener is provided with a releasing end stop or so-called slip stop S. There is only one slip stop member, applied to only one stringer of the fastener. Referring now to Figs. 4 and 5 of the drawing, it may be explained that the slip stop comprises a pressure receiving portion 48, and brake portions 50. The pressure receiving portion 48 is disposed between the heads of elements on one stringer, for engagement by the heads of elements on the opposite stringer. The brake portions 50 are arranged for spreading or brake action against the flat inside faces of the wings of the slider.

The slip stop is so dimensioned that of itself it presents little or no resistance to passage through the slider channel, as, for example, if the stop-bearing stringer alone is passed through the slider. However, the pressure receiving portion 48 and the brake portions 50 are so shaped and interconnected that when the ends of the elements of the other stringer exert a pressure on the pressure receiving portion 48, as indicated in Figs. 6 and 7 of the drawing, when the elements are meshed in the stem of the Y-shaped channel, the brake portions 50 spread or expand in a direction transverse of the plane of the stringers. In consequence the slider'is arrested at the slip stop when pulled with a normal force, yet may be pulled past the slip stop by a strong pull, at which time the stem portion of the slider expands elastically to accommodate the passage of the slip stop, as is indicated in solid lines in Figs. 8 and 9.

Considering the drawing in greater detail, and referring first to the slider, the top wing 26 (Figs. 8 and 9) 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 or stem end of the slider. 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 any usual separable bottom stop construction, that here shown in Fig. 1 being the one disclosed in the U. S. patent to Ulrich, No. 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 said 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 I4. As is well known in the art, when the slider I8 is inits lowermost position on the slide fastener and in contact with the top of the clip 40, the pin 44 may be threaded through the slider I8 and into or out of the socket 42. In general, the separable bottom stop may be of any desired conventional construction.

The releasing stop or slip stop of the present invention is usually located near the closed end of the slide fastener. One stringer, in this case stringer I2, is made longer than the other stringer I4, and is provided with a true or permanent top stop 46. When the slider is forcibly pulled past the slip stop S, it is finally halted by top stop 46. The top stop 46 is spaced upward from the endmost fastener element on the other stringer I4, by an amount slightly greater than the length of the slider I8. The cords comprising the beaded edge 24 of the stringer I4 are cut off or removed above the endmost fastener element I6, thereby facilitating sideward disengagement of the slider I8 from the stringer I4.

The stringers are then readily pulled apart, and the entire length of the slide fastener stripped open.

Referring now to Figs. 3 and 4, the releasing end stop S formed from a substantially rectangular resilient strip, preferably a spring metal such as Phosphor-bronze, which in one specific case has a thickness of approximately 0.010 inch. A central portion e of the strip is punched or cut out to form the blank B shown in Fig. 3. The blank is bent on the lines a r-a, bb, c-c and dd to form the preferably symmetrical stop shown in Fig. 4.

structurally, the stop may be described as comprising a pair of spaced cross bar or crest portions 48, joined to a pair of outwardly extending flanges 56, by pairs of spaced legs 52. The crest portions 48 and the flanges 50 are in generally parallel planes. At this time the legs 52 are parallel to one another and perpendicular to the crest and flange portions. The contour of the cut-out e (Fig. 3) includes recesses 54. The ends 55 of the cut-out e are outside the fold lines H and d-d. The resulting oppositely disposed crest notches 54 (Fig. 4) and flange notches 56 as well as the spacing between the legs, form an opening 58 which is of such a size as to permit a fastener element to pass therethrough.

To assemble the releasing end stop on a stringer, the stop is simply slipped over a fastener element, here designated I6", so that the fastener element passes through the opening 58. The crest notches 54 accommodate the usual projection or projections on the fastener element. Although the

notches

54 and 58 are preferred, they may be omitted, for the fastener element projections may be bypassed by simply convexly flexing the stringer. Also, if desired, the legs 52 may be spread outwardly to allow the stop to be positioned over the element and the beaded edge 24 of the stringer I4. The stop is clinched onto the stringer by applying sufficient pressure at the bends a and d to set the material of which the stop is formed. As shown in Fig. 5, when the stop S is assembled on the stringer, it possesses a substantially i2 configuration in cross-section. The thickened beaded edge 24 of the stringer, and the ends of the jaws of the fastener elements, will prevent the stop from slipping ff, though the stringer may be severely flexed.

As shown in Figs. 5 to 9, the stop is so dimensioned that each crest portion 48 and its supporting legs 52 are disposed intermediate the fastener element I6 and another fastener element on each side thereof. The flanges 50 are disposed immediately behind the ends of the fastener element jaws, and extend in a plane perpendicular to the plane of the stringers I2 and I4. The distance between the brake surfaces, or the exposed edges 60 of the anges 50 is approximately equal to the distance between the top and

bottom wings

26 and 28 of the slider I8. The distance between the flange edges 50 may be made slightly less than the distance between the slider wings, yet the desired brake resistance may be obtained. The height of the stop, that is, the distance from crest to flange, is such that when added to the length of the fastener element on the opposing stringer, the overall distance is slightly greater than the distance between the slider rails in a transverse direction. The dimension of the crest portions 48 in a direction perpendicular to the plane of the stringers I2 and I4 does not exceed the Width of the adjacent fastener elements. Thus. the

stop is so dimensioned and formed that of itself it supplies little or no resistance to the pas sage of the slider, yet it affords the desired stopping or brake action when it is in pressure engagement with the fastener elements on the other stringer.

When the slider I8 is moved upwardly or in a closing direction, the stop S readily passes the neck 3!! of the slider It and enters one branch of the Y-shaped channel until the lowermost crest portion engages an opposing fastener element on the stringer 12 in the stem of the Y- shaped channel, as shown in Fig. 6. Though the flanges 55) are disposed behind the legs of the fastener elements, the Y-shaped channel is of sufficient size in a transverse direction to permit the passage of the slide fastener elements and the extra thickness represented by the thickness of the flanges 5B, provided that the crest i8 is bent as shown in Fig. 8. As heretofore stated, the stop is formed from relatively thin stock, approximately 0.0l inch. However, the engagement of opposed fastener elements on the stringer l2 with the crest portions 43 causes the movement of the slider to be temporarily halted.

The major component of resistance to slider movement is supplied by the frictional drag or brake action exerted by the edges so of the flanges 50 against the inner faces of the

slider wings

26 and 28. This brake action is due to the spreading or expansion of the legs 52 caused by the pressure of the ends of the fastener elements Iii against the crest portions it. While there is a reaction pressure between the flanges i] and the slider rails 32 and 3d, and hence a certain amount of frictional drag at these areas, the slider rails function mainly to position the flanges 50 and so to permit their brake edges Ell to exert outward pressure on the inside faces of the slider wings. Thus, the pressure applied to the stop is transmitted to the most resilient portions of the slider, that is, the inside faces (parallel to the plane of the stringers) at the narrow or stem end of the slider.

By this construction the brake action is obtained in a wholly resilient system, thereby permitting all the elements involved to return to their normal positions (except for a break in later referred to). The stop member is itself formed of resilient material. It is mounted upon a resilient beaded tape. The brake portions of the stop operate on a resilient portion of the slider. This resilient system permits long and continued satisfactory perforance.

The release of the slip stop is due primarily to the yielding of the slider, rather than yielding of the slip stop per se or any other component. This expansion of the slider can be measured as the slip stop is passing through the slider. However, largely because of tolerance difliculties, other factors contribute to the operation, though to a much smaller extent. There are manufacturing variations in the width of the slider between flanges at the stem. There are variations in the height of the channel. Sometimes there is a slight misalignment between the rails of the top wing relative to the bottom wing of the slider. The height of the slip stop may vary somewhat. The length of the fastener element or scoop at the point where it comes into contact with the crest of the slip stop may vary. These variations may be present in different combinations. The slip stop is preferably so proportioned that its dimension assumes the Worst possible combination of variations, so that slider channel dimension.

6 even if the tolerances all tend toward maximum freedom, the slip stop will nevertheless provide adequate brake action. Of course, if the tolerances all tend toward minimum dimension, the brake action will be increased, but this is not serious, for a reason explained later.

Another factor to be kept in mind is that the contact edges or brake shoe edges of the slip stop are formed by a punch and die operation and are therefore rough. Moreover, the inner faces of the slider may have a slight roughness. This increases the initial brake action.

It has been determined by experience and by customer preference that a desirable range of brake action is from 2 to 5 pounds, that is, the pull needed to draw the slider past the slip stop should lie between 2 and 5 pounds. This may be different for some special purpose, and in later years the customer preference may change; hence the figure should be considered merely an example and not a limitation of the invention. The initial brake action of a new slip stop made as described above, and subject to the variations described above, may be as high as 3 pounds. I have found, however, that the very first pullover or break-in stroke of the slider substantially reduces this excess resistance. Apparently there is a burnishing of the brake shoe edges and of the inside walls of the slider. Moreover, although the slip stop is made of resilient material, the nature and the thickness of the material is such that it will be subject to a certain amount of deformation after assembly, probably taking place most notably in the crest portions of the stop, but there may also be some deformation of the legs and brake portions to adapt themselves to misaligned slider flanges or differences in There may also be some burnishing of the nose of the particular scoops which bear against the crest portions.

This adaptation takes place ordinarily in a single pull or break-in stroke of the slider past the slip stop. Thereafter any further reduction in brake action takes place very slowly. In practice I have found that the brake action may be reduced from, say, 8 pounds to less than 5 pounds in a single stroke, and that it will then be maintained in the desired range of from 2 pounds to 5 pounds for well over 500 strokes. These figures are an example based on one particular construction and fastener size.

The burnishing which occurs with repeated use influences the friction, but actual wear of the components is small. The resilience of the slider and the firmness of the slip stop after it has been adapted to the slider, change very little.

In theory, the height of the slip stop from one brake shoe edge to the opposite brake shoe edge may equal or be less than the width of the fastener elements, as shown in Fig. 5 of the drawing. In practice it is preferably made slightly greater for reasons pointed out above, and having to do with the dimensional tolerances in the manufacture of the slider itself. Nevertheless, it should not be thought that the slip stop is itself a resilient brake member which works by reason of its own expansion. This is readily shown by passing only one stringer through the slider. If the stringer carrying the slip stop is passed through the slider, without the other stringer, it will be found that the resistance to movement is only a fraction of a pound, say one-third pound, even when the spacing between the brake shoe edges exceeds the spacing between the wings of the slider.

The break-in stroke might be left to the user of the slide fastener. However, I prefer that it be performed at the factory of the manufacturer, in which case the fastener is delivered with desired brake pull, and tested for perfect operation.

Because the slip stop offers little or no resistance to the passage of the slider thereover unless there is coaction with fastener elements on the opposing stringer, it is entirely feasible to mount the stop on either one of the two stringers. In other words, if the stop is mounted on the stringer i2, the slider is not stopped from return move ment on the stringer 12 to the bottom of the fastener.

Another advantage of using a slip stop on one only of the two stringers is that it is not necessary to guard against so-called mismesh of the fastener at the bottom stop. In Fig. 1 the fully separable bottom stop is devoid of special means to insure identical mesh of the fastener elements thereabove. If the operator is careless and does not insert the pin 44 fully into the socket 40 the elements may be meshed one or two steps higher than the relation shown. This is of no consequence in respect to proper operation of the present slip stop, which cooperates with the regular fastener elements on the other stringer.

A modification of the releasing end stop is shown in Figs. and 11. Instead of utilizing two crest portions and four legs, the stop S comprises one crest portion 62 joined to flanges 64 by means of two legs 66. The stop S is mounted on a stringer in the same manner as hereinbefore described, except that it is placed between two elements. It functions in the same way, but the flanges 64 are held behind the ends of the jaws of two fastener elements.

In the drawings, an extra fastener element It (Fig. 1) is shown secured to the beaded edge of the tape beyond the fastener element which is adjacent the slip stop. This extra fastener element is for the purpose of reinforcing the beaded edge of the tape, and beyond element 16 the beaded edge is removed.

' While the releasing end stops of the present invention have been described in conjunction with a fastener of the fully separable type, they are utilizable with a fastener having a bottom stop which is not fully separable, such as disclosed in co-pending application, Serial No. 613,890, filed August 31, 1945, now matured into Patent 2,573,658 dated October 30, 1951, of David Rabinow and the present inventor.

It is believed that the construction, method of manufacture, and theory of operation of my improved releasing end stop, as well as the advantages thereof, will be apparent from the foregoing detailed description. The stop requires little metal, is inexpensive to manufacture, and is easily applied to a stringer without necessitating modification of the regular fastener elements on the stringer. The stop is unobtrusive and neat in appearance. In fact it is hardly noticed unless looked for. Only a single stop, applied to only a single stringer, is needed, and it may be applied to either stringer. It maintains its stopping function even after long continued use. It makes use of the inherent resilience of the slider at the stem portion thereof, and this spring action is far more dependable and longer lived than would be obtainable from so tiny a spring as the stop member itself.

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,

8 without departing from the spirit of the invention, as sought to be defined in the following claims.

I claim:

1. A quick-disassembly slide fastener comprising a pair of stringers having interlockable fastener elements, a slider having wings with inside faces generally parallel to the plane of the stringers, and a bent sheet metal releasing end stop, said stop having a pressure receiving portion and a brake portion, said pressure receiving portion being disposed between the heads of elements on one stringer and having a surface extending generally transversely of the plane of the stringers for engagement by the head of an element on the opposite stringer, said brake portion being disposed inwardly of the pressure receiving portion for action against the aforesaid generally parallel inside faces of the wings of the slider, said stop being so dimensioned relative to the slider as to itself present little r no resistance to passage through the slider channel when not engaged by an element on the opposite stringer, but said pressure receiving portion and brake portion being so shaped and interconnected that when the end of an element of the other stringer exerts in the plane of the stringers a pressure on the pressure receiving portion of the stop as the elements are meshed, the brake portion expands in a direction transverse to the plane of the stringers, whereby the slider is arrested when pulled with a normal force, yet may be pulled past the stop by a strong pull.

2. A quick-disassembly slide fastener comprising a pair of stringers having interlockable fastener elements, a slider having a Y-shaped channel, the wings of said slider being connected at one end and being slightly resiliently separable at the other end or stem of the Y, and a bent sheet metal releasing end stop, said stop having a pressure receiving portion and a brake portion, said pressure receiving portion being disposed between the heads of elements on one stringer and having a surface extending generally transversely of the plane of the stringers for engagement by the head of an element on the opposite stringer, said brake portion being disposed inwardly of the pressure receiving portion for action against the fiat faces of the wings of the slider, said stop being so dimensioned relative to the slider as to itself present little or n resistance to passage through the slider channel when not engaged by an element on the opposite stringer, but said pressure receiving portion and brake portion being so shaped and interconnected that when the end of an element of the other stringer exerts in the plane of the stringers a pressure on the pressure receiving portion of the stop as the elements are meshed in the stem of the Yshaped channel, the brake portion expands in a direction transverse to the plane of the stringers and elastically spreads apart the wings of the slider at the stem portion, whereby the slider is arrested when pulled. with a normal force, yet may be pulled past the stop by a strong pull.

3. A quick-disassembly slide fastener comprising a pair of stringers having interlockable fastener elements, a slider having wings with inside faces generally parallel to the plane of the stringers, and a releasing end stop, said stop being a bent piece of resilient sheet metal shaped to fit between fastener elements and having a pressure receiving crest portion and flange-like brake portions connected by leg portions, said pressure receiving crest portion being disposed between the heads of elements on one stringer and extending generally transversely of the plane of the stringers for engagement by the head of an element on the opposit stringer, said leg portions lying between jaws of the elements, and said brake portions being disposed inwardly of the pressure receiving portion at the ends of the jaws of the elements for action against the aforesaid inside faces of the wings of the slider, said stop being so dimensioned relative to the slider as to itself present little or no resistance to passage through the slider channel when not engaged by an element on the opposite stringer, but said pressure receiving portion and brake portions being so shaped and interconnected that when the end of an element of the other stringer exerts in the plane of the stringers a pressure on the pressure receiving portion of the stop as the elements are meshed, the brake portions expand in a direction transverse to the plane of the stringers, whereby the slider is arrested when pulled with a normal force, yet may be pulled past the stop by a strong pull.

4. A quick-disassembly slide fastener comprising a pair of stringers having interlockable fastener elements, a slider having a Y-shaped channel, the wings of said slider being connected at one end and being slightly resiliently separable at the other end or stem of the Y, and a releasing end stop, said stop being a bent piece of resilient sheet metal shaped to fit between fastener elements and having a pressure receiving crest portion and flange-like brake portions connected by leg portions, said pressure receiving crest portion being disposed between the heads of elements on one stringer and extending generally transversely of the plane of the stringers for engagement by the head of an element on. the opposite stringer, said leg portions lying between jaws of the elements, and said brake portions being disposed inwardly of the pressure receiving portion at the ends of the jaws of the elements for action against the flat faces of the wings of the slider, said stop being so dimensioned relative to the slider as to itself present little or no resistance to passage through the slider channel when not engaged by an element on the opposite stringer, but said pressure receiving portion and brake portions being so shaped and interconnected that when the end of an element of the other stringer exerts in the plane of the stringers a pressure on the pressure receiving portion of the stop as the elements are meshed in the stem of the Y-shaoed channel, the brake portions expand in a direction transverse to the plane of the stringers and elastically spread apart th wings of the slider at the stem portion, whereby the slider is arrested when pulled with a normal force. yet may be pulled past the stop by a strong pull.

5. A quick-disassembly slide fastener comprising a pair of stringers having interlocka-ble fastener elements, a slider having a \--shaped channel, and a resilient releasing end stop, the releasing end stop being secured to one stringer intermediate at least a pair of fastener elements, said stop comprising a piece of sheet metal bent to form a crest portion, a pair of outwardly projecting flanges and a pair of legs joining the crest portion and the flanges, the crest portion and the flanges being in spaced parallel planes, with the crest portion at the head ends of the elements.

6. A quick-disassembly slide fastener compris ing a pair of stringers having interlockable fastener elements, a slider having a Y-shaped channel, and a resilient releasing end stop, the releasing end stop being secured to one stringer intermediat at least a pair of fastener elements, said stop comprising a crest portion adapted to engage a fastener element of the other stringer, a pair of outwardly extending flanges and a pair of legs joining the crest portion and the flanges, the crest portion and the flanges being in spaced parallel planes perpendicular to the plane of the stringers with the crest portion at the head ends of the elements whereby engagement by the fastener element on the other stringer with said crest portion causes said flanges to apply forces resistive to the movement of the slider.

7. A quick-disasseinbly slide fastener comprising a pair of stringers havin interlockable fastener elements, a slider having a Y-shaped channel, and a resilient releasing end stop, the releasing end stop being secured to one stringer, said stop comprising a pair of spaced crest portions adapted to engage fastener elements of the other stringer, a pair of outwardly extending flanges and a pair of legs joining each crest portion to the flanges, the crest portions and flanges being in spaced parallel planes perpendicular to the plane of the stringers, each crest portion being disposed intermedia e a pair of fastener elements with a fastener element extending between said crest portions with the crest portions at the head ends of the elements whereby engagement by said fastener elements on the other stringer with said crest portions causes said flanges to apply forces resistive to the movement of the slider.

8. A quick-disassembly slide fastener comprising a pair of stringers having interlockable fastener elements. a slider having a Y-shaped channel, and a resilient releasing end stop, the releasing end stop being secured to one stringer, said stop comprising a pair of spaced crest portions adapted to engage fastener elements of the other stringer, a pair of outwardly extending flanges and a pair of legs joining each crest portion to the flanges, the crest portions and flanges being in spaced parallel planes perpendicular to the plane of the stringers, said crest portions being provided with notches and said flanges beingprovided with notches intermediate and adjacent said legs, each crest portion being disposed intermediate a pair of fastener elements with a fastener element extending between said crest portions with the crest portions at the head ends of the elements whereby engagement by said fastener elements on the other stringer with said crest portions causes said flanges to apply forces resistive to the movement of the slider.

9. A resilient releasin end stop for use with a slide fastener incl ding a pair of stringers having interlockable fastener elements and a slider having a Y-shaped channel, said releasing stop comprising a crest portion, a pair of outwardly extending flanges and a pair of legs joining the crest portion and the flanges, the crest portion and the flanges being in spaced parallel planes. said stop being used with the crest portion at the head ends of the elements, said crest portion being provided with a, notch to facilitate bypassing the projection on a fastener element when said stop is assembled with a stringer.

10. A resilient releasing end stop for use with a slide fastener includin a pair of stringers having interlockable fastener elements and a, slider having a Y-shaped channel, said releasing end stop comprising a pair of crest portions, a pair of outwardly extending flanges and a pair of legs oining each crest portion and the flanges, the

' crest portion and the flanges being in spaced parallel planes, said stop being used with the crest portion at the head ends of the elements, said crest portions being provided with notches and said flanges being provided with notches intermediate and adjacent said legs whereby assembly of the releasing end stop with a stringer is facilitated.

11. A quick-disassembly slide fastener comprising a pair of stringers having interlockable fastener elements, a slider having a Y-shaped chan-- nel, and a resilient releasing end stop formed of sheet metal bent to substantially capitalized omega shape in cross-section, the releasing end stop being secured to one stringer intermediate at least a pair of fastener elements with the midportion of the omega near the head ends of the elements in the area of interlocking engagement of the elements on both stringers, said stop being so formed that it Will be received in its entirety within said slider channel, said stop affording the requisite resistance to the passage of the slider thereover only when a fastener element on the other stringer is in engagement therewith, and

said stop applying resistive forces perpendicularly to opposed surfaces within the slider at the narrow end thereof, which surfaces are parallel to the plane of the stringers.

12. A releasing end stop for use with a slide fastener including a pair of stringers having interlockable fastener elements and a slider having a Y-shapcd channel, said releasing end stop comprising a resilient member formed of sheet metal bent to substantially capitalized omega shape in cross-section and adapted to be used with the plane of the stringers, when the slider causes engagement of the stop with a fastener element on the other stringer.

13. A resilient releasing end stop or slip stop for use with a slide fastener including a pair of stringers having interlockable fastener elements and a slider having a Y-shaped channel, said releasing end stop being made of sheet metal and comprising a crest portion, a pair of outwardly extending flanges and a pair of legs joining the crest portion and the flanges at the extremities of said legs, the crest portion and the flanges being in spaced parallel planes with the distance from crest portion to flanges being less than the length of a fastener element, and said stop being used with the crest portion at the head ends of the elements.

14. A resilient releasing end stop or slip stop for use with a slide fastener including a pair of stringers having interlockable fastener elements and a slider having a Y-shaped channel, said releasing end stop being made of sheet metal and comprising a pair of spaced crest portions, a pair of outwardly extending flanges and a pair of legs joining each crest portion and the flanges at the extremities of said legs, the crest portions and the flanges being in spaced parallel planes with the distance from crest portion to flanges being less than the length of a fastener element, and said stop being used with the crest portion at the head ends of the elements.

OTTO J. MOEHLER.

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

UNITED STATES PATENTS