US2590106A - Slide for hookless fasteners - Google Patents

Description

March 25, 1952 s. 1. LACKRITZ SLIDE FOR HOOKLESS FASTENERS Filed May 10, 1946 INVEN TOR. BY J 5 RTTORQIEXS Patented Mar. 25, 1952 SLIDE FOR HOOKLESS FASTENERS Samuel J. Lackritz, New York, N. Y., assignor t Kee Zipper Corporation, New York, N. Y., a corporation of New York Application May 10, 1946, Serial No. 668,678 13 Claims. (Cl. 24-20515) My invention relates to a new and improved slide for hookless fasteners of the well-known zipper type or of any other type. Such fasteners are applied to undergarments, such as corsets and girdles, outer garments such as dresses and trousers, and to other articles which are made of fabric.

Such garments and articles frequently have an opening which is closed at one end thereof. The bases of the tongues or fastener elements are connected to the respective longitudinal edges of said opening, in respective longitudinal rows. While the invention applies to any type of opening, it is of particular utility in association with an opening which is closed at one end thereof.

The slide frequently catches upon the fabric of the article or the tongues of the hookless fastener frequently jam within the slide. In such case, it is impossible to operate the slide in the longitudinal unlocking direction, and it is sometimes impossible to move the slide in the locking direction.

According to my invention, the slide may be generally of any suitable shape or type, since such slides are well-known per se.

An important feature of my invention is to provide the slide with two longitudinal walls, disposed transversely relative to each other, said longitudinal walls being movable transversely relative to each other. These walls have separated transverse flanges, which define the longitudinal channel of the slide. By means of a relative transverse movement away from each other, I can easily release the flanges of the slide from the stringers or from the cloth of the garment or other article. I can thus also transversely move the flanges of the slide away from the bases of the tongues on the stringers, so that the flanges of the slide wholly clear the tongues or the stringers, or sufiiciently transversely clear the bases of the tongues which are clamped to the stringers, so that the slide can be freely slid in some cases in the unlocking direction to the closed end of the opening in the garment or other article. The slide can also then be slid in the locking direction without interlocking the tongues or other elements of the hookless fas-,

tener. I can thus easily separate the slide from the engaged part of the cloth of the garment or other article, or from a jammed part of the tongues or other elements of the hookless fasteners.

When the undesirable condition has been corrected, the flanges of the slide can be again moved into operative position, because the slide is not permanently distorted by releasing it from the tongues or stringers.

I prefer to use a one-piece slide, which has longitudinal walls which are integral with a resilient transverse web or yoke. Said resilient transverse web biases the longitudinal flanges of the longitudinal walls transversely away from each other into respective non-operative positions. I also provide a locking post for holding said flanges in respectiveoperatlve positions. It has been proposed, as in Sico U. S. Patent No. 2,227,766 dated January 7, 1941, to provide a slide with longitudinal walls which are biased away from each other by a resilient connecting yoke. In the Sico construction, a fixed post is rigidly secured to one longitudinal wall of the slide and said post extends through a hole in the opposed longitudinal wall, which has a locking fingerpiece turnably connected thereto. Such prior device has been expensive and difficult to manufacture.

According to my invention, I provide a single transverse post which is turnable relative to both said walls around the axis of said post. Said post is also movable relative to both said walls, in the direction of the axis of said post, when said post releases said walls. Said post also has holding means for releasably holding said walls in respective operative positions. I thus provide a very simple device which can be easily manufactured and assembled at low cost, and which can be very easily operated.

Other objects and advantages of my invention are stated in the annexed description and drawings, which illustrate a preferred embodiment. In this embodiment, I illustrate one type of hookless fastener which as interlocking tongues, but the invention applies to any type.

Fig. 1 is a top plan view, the parts of the slide being in operative position. The slide is moved upwardly in locking direction to connect the hookless fastener elements of the stringers to each other, and downwardly in unlocking direction to disconnect said hookless fastener elements. If the opening has a closed end, such end is at the bottom of the opening. Such closed end is not shown, as this is well known.

Fig. 2 is a perspective view of the improved slide.

Fig. 3 is an inner side elevation or longitudinal elevation of one of the stringers and its attached tongues or hookless fastener elements, showing the flanges of the slide in respective operative positions. In this view, the flanges are spaced longitudinally from the tongues.

tudinal stringers I and 2 are fixed to the free longitudinal edges of the fabric pieces 3 and G, in

the usual manner. The laterally disposed tongues or elements 5 of the hookless fastener are of the usual type. The bases or lateral inner ends of tongues 5 are fixed to the stringers I and 2.

The slide S is of any suitable shape.

Said slide S has opposed longitudinal walls G and I, which are preferably rigid, although.

they may be bendable and resilient. These opposed walls 6 and I are integral with a resilient and bendable transverse yoke or web 8.

The longitudinal wall 6 is integral with a pair of transverse flanges 9, and the longitudinal wall I is integral with a pair of transverse flanges Ii). Each flange 9 is separated from its respective adjacent flange Ill. The flanges 9 are identical with each other, and the flanges ID are identical with each other. 'All of the flanges 9, I9 may be identical.

When the lockingpin or post P is in its looking position of Fig. 2, the flanges 9 and III are in operative position. As shown in Fig. 4, when the locking post P is in unlocking position, the flanges 9 and I9 are transversely spaced from each other, and said flanges 9 and III are in nonoperative position.

These flanges 9 and II} form a longitudinal channel of double taper, which is of minimum width at about its median lateral plane. flanges 9 and III slidingly abut the stringers or the bases of the tongues 5 at said median part of said channel, when said flanges 9 and II are in their respective operative positions.

The resilient transverse yoke or web 8 biases the longitudinal walls 5 and 1 and the flanges 9, III to their respective non-operative positions shown in Fig. 4, in which the median or bearing parts of said flanges 9, III transversely clear the bases of the tongues 5. When the flanges 9, I9 are in {such respective non-operative positions, the slide S can be freely slid longitudinally in the bottom or unlocking direction, without contact between the bearing parts of said flanges 9 and Ill and the bases of the tongues 5 of the stringers. As shown in Fig. 2, a transverse pin P is located between the web 8 and the free ends of the walls 6 and I. This pin P has a cylindrical shank II which normally tilts the interlocked tongues 5 away from each other, when slide S is slid in the longitudinal disengaging direction. Said shank II, which then operates as a release member, is located longitudinally between web 8 and the opposed end of the slide. Optionally, and as shown in Fig. 4, the flanges 9, I9 do not wholly transversely clear the bases of the tongues 5 of the stringers when said flanges 9, III are in their respective non-operative positions, thus preventing the lateral shifting ofthe slide S off said tongues 5. In suchcase, the slide S cannot be turned freely around the longitudinal axis of shank I I or web 8, even if the flanges 9, ID are in respective non-operative positions, although a limited turning movement is possible. It is Sufficient if themedian bea me o iqnsni the flanges 9, I are located respectively above The- 4 and below the bases of the tongues 5, in the positions shown in Fig. 4. Between said bearing portionsof said flanges 9, III, and the free ends of said flanges 9 and III, they may partially embrace the bases of the tongues or the stringers I and 2. Optionally the web 8 may be of sufiicient length and the walls 6 and 1 may be sufficiently movable away from each other, so that the flanges 9, III will wholly transversely clear and release the tongues 5 and the stringers, when said flanges 9 and III are in their respective nonoperative positions. Likewise, when said flanges 9, I6 are in their respective non-operative positions, the slide S can be freely moved in the locking direction, which is upward in Fig. 1, without interlocking the tongues 5. The slide S can thus be slid in the locking direction wholly off the tongues 5, either wholly off the garment, or to a portion of the stringers I and 2 which is free from the tongues 5, or to a non-jammed portion of the tongues 5.

Hence, if the slide S has caught upon the fabric, it can be released from the fabric and slid in either direction away from the engaged I part of the fabric.

tongues, so that it is easy to separate the jammed tongues, because the flanges 9 and I0 then release the jammed tongues. Since the slide S can thus be slid wholly off the tongues 5, the garment can be quickly opened. If desired, the

' released slide S can be slid wholly off the tops of the stringers I and 2, without interlocking the tongues 5 above the jammed tongues 5. If the flanges 9 and II] are sufliciently separated by the resilience of the web 8, the released slide S can be turned around the axis of web 8 so that the flanges 9, II] are located wholly off the tongues 5. The released slide S can then be turned through any angle around the longitudinal axis of web 8.

In this embodiment, the pin P also functions as a control pin for releasably maintaining the flanges 9 and III in operative positions, in which they interengage the tongues 5 when slide S is moved in the looking or engaging direction. In this embodiment, the pin P also serves as a finger hold for slide S. In addition to its cylindrical shank II, said pin P also has a non-cylindrical shank I4. As shown in Figs. 3 and 14, the shank II is located substantially at the ends of the flanges 9 and III which are proximate to the yoke B, and between yoke 8 and said proximate ends of flanges 9 and III. In this embodiment, the non-cylindrical shank I4 has a rectangular crosssection. The longitudinal wall 6 has a noncylindrical bore I5. The longitudinal wall I has a cylindrical bore, in which the cylindrical shank II fits turnably. For convenience, the bore of wall I is designated as the first bore, and the non-circular bore of wall 6 is designated as the second bore. Said cylindrical shank II has an enlarged head I2 which is external to wall I. The control pin P is provided with a finger-hold ring I6.

When the pin P is in the locking positionof Figs. 1, 2, 3, the shoulders of the non-cylindrical shank I4 externally abut the wall 6, thus holding the walls 6 and I and their flanges 9, H1 in their respective operative positions.

When the control pin P is turned 90 around its longitudinal axis from the position of Figs. 1, 2, 3 to the unlocking position of Fig. 4, the noncylindrical shank I4 can enter the alined bore [5 of wall 6, so that the walls 6 and 1 spring apart under the spring bias of the yoke or web 8. The non-cylindrical shank It then optionally fits closely in the bore 15.

When it is desired again to use the released slide, the walls 6 and l are forced transversely towards each other,'until the pin P can be turned to the position of Fig. 2.

It is thus possible initially to apply the slide S to the stringers I and 2, while the longitudinal walls 6 and 1 and the flanges 9, ID are in their respective non-operative positions, and while the tongues 5 are unlocked from each other. The walls 6 and 1 of the applied slide can then be moved transversely towards each other to their respective operative positions, and the pin P can be turned to its locking position of Fig. 2. A slight relative transverse movement of the walls 6 and l is suflicient to apply the slide operatively or to release the slide. The ring l6 also provides the usual finger-hold for operating the slide.

I thus provide an improved slide which can be made at low cost.

The invention is not limited to the one-piece construction of the slide, or to the use of a resilient web as spring means for biasing the channel-flanges away from each other, or to the use of any biasing spring means.

It is of course well known to attach the tongues 5 to the stringers or to thickened parts of the fabric pieces 3 and 4, so that the tongues 5 are invisible when the opening is closed. In such case, and in many known types of hookless fasteners, the flanges 9 and In, or either the flanges 9 or ID, embrace and slide upon the stringers or the thickened portions of the fabric pieces. Since the invention relates to the slide, it applies to any type of hookless fastener. Likewise, the junction between web 8 and either of the walls 6 and 1 may be rigid, so'that only one of the Walls 6 and I may be transversely movable relative to web 8. Hence, when I state that the channel-means are relatively movable transversely towards and away from each other, I include any type of relative transverse movement.

As shown in Fig. 4, when the post P is in nonholding position, said post is movable in the direction of its axis, relative to both longitudinal walls 6 and 1. The outer end of the post which is adjacent the shank-part M has an enlargement, which prevents the slide from being moved upwardly off the post. The bottom enlargement I2 prevents the slide from being moved downwardly off the post. The slide S and post P thus provide an efficient assembly, which can be made and shipped as a unit, independently of the associated hookless fastener elements.

A number ofadvantages accrue by reason of the structure thus described, some of which have been heretofore indicated; others will now be referred to: H

One of these is the contour at the sides of the planar walls 6 and I and which presents the bending line for flanges 9 and ID, the bend line extending arcuately to thereby present the throat'of the slider as flared outwardly at both 'as in Fig. 3.

6, ends with the constricted portion in a mid-zone of'the length of the walls. Under normal operating conditions, only the flared open end which carries post P and the'constricted portion of the throat is actually needed for service in the slider movements, the opposite flared end being inactive under such conditions. The latter flared end may be of service in the event that stringerborne elements below the slider (in Fig. 1) may be imperfectly interlocked and thus increasethe width of the element zone at such point, a condition which could tend to prevent the constricted portion from passing freely over the zone when the slide is being moved downward (in Fig. 1) over such zone. The normally inactive flared end will then tend to move the elements to move to the interlocked position and permit free movement of the slide in such direction.

However, the important advantage in this connection is the support which the arcuate curvature gives to the flanges 9 and 10. These flanges in the constricted throat zone are subjected to outward pressure due to the resistance present when moving the elements to their interlocked positions, and since the flanges are supported only along one edge, such pressure could tend to bend the flares outwardly during movement of the slide in an upward direction in Fig. 1.

In the illustrated construction, the arcuate form of the bending line serves to restrict the constricted zone to a very short length. Thus, the arcuate curvature, which extends in both directions from such point, is active to support the flanges against bending outward, such support being due to the difficulty in moving the flanges outwardly where the bending line is curved. Consequently, while the lower flared zone (Fig. 1) may be inactive to move the elements into their interlocking positions, such flared zone is actually active in aiding in supporting the flanges against outward bending during the movements of the slider, due to the curvature which provides the flare.

Another advantage is presented through the form of post P and its activities. The post is a unitary structure and performs the service of a number of separate parts usually found in structures of this type. For instance, the shank ll of the post spans the distance between the upper and lower planar walls 6 and 1 and this portion of the shank thus crosses the zone within which the stringer elements 5 have their movements, and since the shank is positioned in advance of the biasing element 8 during movement of the slider in the direction to open the elements, the shank itself provides this element-opening service. In usual commercial practice, this is provided by a special anchored opening structure. In the present invention, in which the post is always rotatable about its axis relative to both walls, the shank ll of the post, which is circular in contour, is effective as an element opener in any angular position rotatively of the shank, since the circular contour of the shank presents the same arcuate conditions in all angular positions of the shank.

However, the freedom of rotation of the post P is limited to periods when the upper and lower walls 6 and 1 are parallel, at which time the head I 4 is completely above the upper wall 6, Whenever head l4 extends into slot 15, the non-circular contour of the head and slotprevent rotation of the post and thus of the shank, a condition which does not affect the element opening a'ctivityof the shank, but permits the upper wall .6 to move t its inclined position through activity of biasing member 8, so that its flanges 9 are made inactive to return the elements to their closed or interlocking positions. In other words, the shank H can open the elements by slider movement at all times, but closing of the elemen s is limited to periods when flan es 9 are in the position of Fig, 3.

In the form of the invention shown in the drawings, the spacing of the two heads 12 and I4 is such that the leng h of the connectin circul r connection, shank or stem .H s equa to th distance between the outer fac of planar walls 6 and 1 when in parallelism- This causes the. inner faces of such heads to serve as means for retainin uch walls in their para lel p siti s, while the intermediate stem or shank .l 1 extends across the planes of the stringer-borne elements and thus s rves as the m a s. for opening th elements by downward movement of the slider in Fig. 1.

When it is desired to render walls 6 and 'l inactive relative to the stringer-borne elements, the post is given a quarter-turn rotation, thus alining head is with its opening 15, permitting the head is to pass into the opening, the latter action resulting from the biasing action of connection 8. It is understood that since such position of head 14 relieves the restraint which its inner face provides against spreading of walls 6 and I, the action of connection 8 is provided on both of such walls, the post P moving downward under the action of the connection ,8 and applying downward pressure on the lower head l2, head I4 moving into opening l while the upper planar wall 6 moves upward.

The extent of this spreading movement of the two planar walls 6 and I is determined by the extent of the play between the ends of opening l5 and. the smaller end surfaces of head I4, so far as the wall 6 is concerned, and the playpetween the surface of shank II and the diameter of the opening in wall 1 through which the shank passes. As will be understood, any movement of either wall from the parallel condition acts to change the relation between the planar wall openings and head I4. and shank H, since the inclination of the planar wall also inclines the opening walls relative to the axis of the post; when the I inclination of the opening walls is sufficient to bring corners of these opening walls into engagement with the post surface, such corners present characteristics of a biting effect on the post, thus stopping the further spreading action. This may take place prior to the assemblage reaching the position shown in Fig. 4, in which case (should it be desired to move the walls to the position of that figure) a slight pinching action on walls 6 and 1 relieves the biting effect and permits the post to be moved bodily downward to the position shown whereupon release of the pinching action restores the biting effect, with planar wall I spaced from head 12, the angularity of the two walls being the same before and after the post is moved downward. Hence, the degree of angularity of the two planar walls 6 and I is determined by the value of the play indicated.

Assuming the parts to have been moved to the position of Fig. 4, and it is desired to return the pa ts to the position of Fig. 3, the operator applies a finger to the upper face of wall 6 and applies downward pressure thereon, thus releasing the biting effect of this wall, and the post is then-drawn upward; the initial drawing action will tend to draw the lower planar wall 1 upward through the biting effect present with t at wall, but since such upward movement of the wall also tends to reduce the angularity of the wall, it serves to release the biting effect and permits the post to be drawn through both walls until head l2 contacts the lower wall, whereupon said head I2 moves the lower wall upwardly by positive action; when head I4 is completely withdrawn from opening IS t e post is turned the quarter turn, and pressure on the upper wall 6 is released, the two walls then being in the vicinity of the positions of Fig. 3. Since the bitin effect is completely absent when the walls are in this relation, connection .8 will eliminate any variation from the position of Fig. 3.

Through the construction shown and operated in this manner, it is evident that the construc: tion is greatly simplified, since the entire action is provided by the use of the post P and the cooperating openings carried by planar walls .6 and I. The manual downward pressure and the possible pinching action (both applied on the planar walls) are easily provided, and avoid the necessity of adding additional structures, the addition of which largely increases the cost as well as producing a complicated assemblage. Since the change from the conditions of Fig. 3 to those of Fig. 4 and return, form no part of the normal operation of the slider and come into activity-under emergency conditions, the presence of the manual manipulations to meet the conditions of the emergency are not objectionable and are of such simple type as to require no expert operator to perform them.

I have disclosed a preferred embodiment of my invention, but numerous changes and omissions and additions can be made without departing from its scope.

I claim:

1. A hookless fastening assembly, wherein a succession of stringer-borne elements are moved into and out of engaged positions by the movement of a slider in the direction of length of the stringers, said slider having an open end; wherein the slider is formed with means for moving said stringer-borne elements into engaged positions by slider advance in one direction, said slider carrying a release member, for releasing said stringer-borne elements from the engaged positions by slider advance in the opposite direction, and wherein the slider is formed to permit such slider means to be rendered active and inactive with the stringer-borne elements at will, an assembly of such type characterized by said slider being of sheet metal and having opposing planar walls connected at one connection end which is opposed to said open end by a biasing resilient wall connectionsaid walls being flanged toward each other to produce a slider element moving means, said resilient wall connection permitting relative movement of the opposing walls to render the means active or inactive relative to the. stringer-borne elements at will, said release member being turnably connected to said bottom wall and extending through an opening of said top wall and being movable pivotally about its'axis relative to both walls, said release member having control means which are operative in one position of said release member to maintain the walls substantially parallel to thereby render the slider means active with the sliderborne elements and said control means being operative in another position of said releasable member to permit said walls to move relatively by resilient connection activity to positions inclined relative to each other to thereby render the slider means inactive with such elements, the configuration of said control means being such as to constitute said release member a controlling agency for the walls and also to cooperate with the stringer-borne elements'in movin the latter from their closed positions to their open positions by slider movement in one direction.

2. An assembly as in claim 1 characterized in that the release member is formed with a pair of heads positioned in spaced relation in the direction of length of the member, the spacing distance being such that the inner faces of both heads are active in maintaining the parallel relation of the planar walls, at least one of said heads being positioned on a portion of the member projecting beyond the planar wall with which it cooperates in producing the planar Wall parallelism, said head having a non-circular contour cooperative with a complemental non-circular opening carried by the planar wall which cooperates with the head, said head and opening when in non-registering relation maintaining both planar Walls in parallelism, the head being movable pivotally on the member axis to establish registration between head and opening to free the planar wall from head restraint and cause movement of such wall in the direction of axial length of the head by resilient connection activity to thereby position said wall in its relatively inclined position.

3. An assembly as in claim 2 characterized in that the release member length intermediate the inner faces of the pair of heads is of circular contour in cross-section, and further characterized in that the non-circular contour configuration of said selected head and its opening is rectangular in shape with the narrower dimension approximately equalling the length of a diameter of such circular portion to thereby permit movement of the planar wall adjacent such head to freely move between its parallel and inclined positions. 5

4. An assembly as in claim 1 characterized in that the release member has a length such as to extend through and beyond openings formed in both planar walls, said member having a pair of heads in spaced relation in the direction of length of the member, the spacing distance being such that the inner faces of both heads are active in maintaining the planar walls in parallel relation, one of said heads being positioned at one of the projected ends of the member, and being additionally active to move the planar wall with which it cooperates from its inclined to its parallel position relative to the opposite planar wall.

5. An assembly as in claim 4 characterized in that the second head is positioned at an intermediate point in the length of the member and is of non-circular contour in cross-section and of material length, the member end zone beyond such second head being projected beyond the adjacent planar wall, such adjacent planar Wall having an opening complemental in contour to that of such cross-sectional contour of the second head, said member having means for rotatively moving the member between a position wherein the contours of head and opening are non-alined and a position where they are in alinement to thereby permit the head to enter the opening when in such alined position under axial movement of the member and the biasing action or the resilient connection of the planar walls 10 with the adjacent planar wall moving longitudinally of the head in the alined positions of its opening and such head.

6. An assembly as in claim 5 characterized in that the projected member end zone beyond the .vide rotative movements to the member and to move the opposite planar wall from its inclined to its parallel position by axial movement of the member.

'7. An assembly as in claim 1 characterized in that the release member is movable pivotallyand axially and is formed with a zone of non-circular contour cooperative With an opening of complemental contour carried by one of the planar walls, said zone being movable into and out of such alined relationship by pivotal movements of the member, said zone when out of alinement with its opening being operative to maintain the opposing walls in substantial parallelism and when in alinement with its opening permitting the zone to enterthe opening, the zone being of material length and movable lengthwise of the zone by axial movement of the member and the biasing resilient connection, the latter being cooperative with the member movement when the planar walls are moving from parallel to inclined positions and in opposition to the member movement when the walls are moved in the opposite direction.

8. An assembly as in claim 7 characterized in that the zone is positioned at an intermediate portionof the length of the release member, one end of the member having an enlarged head permanently external of the planar walls, the opposing inner faces of the zone and head being spaced apa and connected by a zone of uniform crosssection and of circular contour; the length of such zone of circular contour being equal to the distance between the outer faces of the pair of planar walls when the walls are positioned in parallel relation, such circular zone constituting a formation cooperative with the stringer-borne elements to open the latter when the slider is advanced in one direction, said member head constituting a formation active to control the position of one of the planar walls when said walls are in parallel relation and to move said wall to such position by member axial movement when the planar walls have been shifted to the relatively inclined positions.

9. An assembly as in claim 8 characterized in that the release member includes a projected portion beyond the non-circular zone with such projected portion carrying a slider actuator pivotally mounted to swing on an axis extending on a diameter of such portion to permit slider bodily advance in either direction during active service, said actuator being operative to move the member pivotally to prepare the slider for its inactive service conditions through movement of the planar walls to inclined positions relative to each other, the actuator and its support being formed to serve as a formation to move the member in the direction of its axis in shifting one of the planar walls from its inclined to its active parallel position.

10. A slide for a hookless fastener device which has two longitudinal rows of hookless fastener elements, said slide having longitudinal walls aeoarocwhich are connected by a transverse resilient web at the rear end of said slide, said walls having transverse flanges which are directedtransversely towards each other from said longitudinal walls, said flanges being inclined laterally relative to each other from their rear ends to provide a tapered throat to interengage such longitudinal rows of hookless fastener elements when said slide is moved longitudinally rearwardly relative to such hookless fastener elements, a transverse pin which has a shank which extends through one of said longitudinal walls, said pin being located forwardly of said web andrearwardly of said flanges, said shank being shaped to tilt and disengage such hookless fastener elements from each other when said slide is moved longitudinally forwardly relative to such hookless fastener elements, said pin being turnable around its axis relative to both said longitudinal walls, means preventing the separation of said pin from said walls, said shank having a laterally enlarged locking head adjacent the other respective longitudinal wall, said respective longitudinal wall having a longitudinal slot, said head being shaped to enter said slot when said head is longitudinally located, said resilient web biasing said walls transversely away from each other to separated non-operating positions when said head enters said slot, said flanges being then suificiently separated to prevent said interengagement of said hookless fastener elements when said slide is thus moved longitudinally rearwardly, said walls being movable transversely towards each other to relative positions in which said locking head is wholly external to the respective adjacent longitudinal wall, said pin being turnable to a position in which said locking head overlies said slot and holds said walls in operating positions, said flanges being located to interengage said hookless fastener elements when said slide is moved rearwardly and said walls are held in said operating positions.

11. A slide for longitudinally disposed hgflzless fasteners, said slide having longitudinal top and bottom walls, said walls having front and rear ends, said rear ends being integral with a resilient rear transverse yoke which biases said walls transversely away from each other to selected separated positions, said walls having flange means which are operative and located to slidably engage and interlock the hookless fasteners when said slide is moved longitudinally rearwardly relative to said hookless fasteners, holding means turnably connected to the bottom wall of said slide and extending through an opening of said top wall and being turnable about its axis relative to both walls, said holding means being operative in a first turned position to mainmm said longitudinal walls in selected proximate positions towhich they have been forced from said selected separated positions and in a second turned position to release said walls to permit them to move-to said selected separated positions, said walls being closer to each other in said selected proximate positions than in said selected separated positions, said holding means being located and operative to separate said hookless fasteners when said slide is moved longitudinally forwardly.

12. A slide in accordance with claim 11, said holding means having an enlarged head which abuts the upper face of said top wall when said holding means is inv said first, turned position and which is positioned within said top wall hole when said holding means is in said second turned position.

13. A slide for longitudinally disposed hookless fasteners, said slide having longitudinal top and bottom walls, said walls having front and rear ends, said rear ends being integral with a resilient. rear transverse yoke which biases said walls transversely away from each other to selected separated positions, said walls having flange means which are operative and located to slidablyengage and interlock the hookless fasteners when said slide is moved longitudinally rearwardly relative to said hookless fasteners, a transverse pin turnably connected to the bottom wall of said slide and extending through an opening of said top wall and being turnable about its axis relative to both walls, said pin having an enlarged head, said head abutting the upper face of said top wall in a first turned position of said pin to force said longitudinal walls toward each other from said selected separated positions to selected proximate positions, said head being positioned within said top wall hole in a second turned position of said pin to release said walls to permit them to move to said selected separated positions, said walls being closer to each other in said selected proximate positions than in said selected separated positions, said pin being located and operative to separate said hookless fasteners when said slide is moved longitudinally forwardly.

SAMUEL J. LACKRITZ.

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

UNITED STATES PATENTS Number Name Date 948,287 Trulove Feb. 1, 1910 2,227,766 8100 et al Jan. '7, 1941 2,366,797 Legat Jan. 9, 1945

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