US2287362A - Slider - Google Patents

Description

June 23, 1942. M. VOITY SLIDER Filed Sept. 16, '1940 ZSheetS-Sh eet 1 MAURICE Von-Y ATTQRNEY.

INVENTIOR.

June 1942-v M. vorrY Y 2,287,362 1 SLIDER Filed Sept. 16, 1940 2 Sheets-Sheet 2 NAURIQE VO/TY BY ATTORNEY.

. of the sheet.

Patented it... 23, 194a UNlTE D STATES PATENT OFF-ICE.

Maurice Voity, Long Island City, N. Y.,

Universal Slide Fastener Co. Inc.,

assignor to New York,

N. Y., a corporation of New York Application September 16, 1940, Serial No. 356,899 3 Claims. (Cl. 24-205) The present invention relates to sliders for separable fasteners, and more particularly to such sliders made of sheet material,

Sliders for separable or interlockingfasteners have heretofore been made in various ways. One type was formed of a single piece stamped out of sheet metal. In this type, the stamped-out blank consisted of two portions constituting the front and rear plates of the slider, joined together by a web stamped or coined for reenforcement. In

forming the slider the two plate portions were bent towards each other until they were spaced the proper distances apart and riveted or welded, the stamped or coined web becoming a neck holding the front and rear plates in position. It has been found that such construction resulted in the two plates, even though spaced by reenforc ing wings, oftentimes not being properly parallel or spaced apart, while the bending operation weakened the neck, and under hard usage the plates were readily. twisted out of relationship.

Another type of slider was formed of separate front and rear plates'stamped from sheet material by diiferent dies. n the one hand, in earlier times, the plates were spaced by heading a separating rivet, while in later devices the separating rivet or block was weldedto the plates. This type of slider entailed the useof different dies for the front and rear plates and the separator head, and bulky in conformation.

In addition to the foregoing disadvantages of the prior art it has been found that during the manufacture of sliders from sheetmetal burrs are formed when the blanks are stamped out An additional trimming operation was usually necessary to remove these burrs, adding to the cost of manufacturing the sliders'.

It is among the objects of the present invention to provide a slider, the front and rear plates of which are automatically properly spaced durin manufacture, and are rigidly connected together so that even under conditions of hard usage they remain properly aligned and spaced.

Another of the objects 'of the present invention is to provide a novel slider, the front and rear plates of which are similar, being formed from a strip with the same die and operations.

Still a further object ofthe present invention is to provide a novel slider construction, which is relatively simple and inexpensive. A These and further objects, advantages and capabilities of the present invention will be-' come more apparent from the following description of a preferred embodiment, illustrated in the drawings, in which:

' predetermined distance and slider plates proper.

Figure 2 is a separated view, in perspective, of

the front and rear plates of the slider illustrated in Figure 1.

Figure 3 is a plan view of.a sheet of material from which the slider isto be formed.

Figure 4 is a plan view of the same sheet after it has been grooved, prior to the die punching operations.

Figure 5 is a section taken through the grooves, taken along the line 5-5 of Figure 4.

Figure 6 is a plan view of the successive slider plate blanks stampedout of the sheet.

Figure '1 is a plan view of the stamped blanks after'flanges or guide tracks have been punched therein.

Figures 8 and 9 are sections through a die-operating on a plate blank, for forming the flanges therein.

Figure 10 is a punched slider plate tab loop has been formed. I

Figure 11 is an enlarged cross-section through a plate taken on the line ll-ll of Figure 10.

plan view of the stamped and Figure 12 is a plan view of the blanks of Fig- Figure 13 is an enlarged cross-section taken along the line l3-|3 through a slider plate of Figure 12.

Referring now to Figures 1 and 2, slider 20 is constructed with a front plate 2| and a rear plate 22 which are similar; and spaced by a predetermined distance. At one end of slider 20 are two diverging outlets 23, 23 arranged between spaced opposed flanges 24, 24 and central formation 25 joining the front and rear plates. Flanges 24 converge towards the rear end 26 of the slider, merging with parallel flanges 21, 21. The opposed edges of flanges 24, 24 are spaced a arranged to permit the tapes of a separable fastener to readily slip therethrough while the fastener elements are confined within the slider.

An important feature of the present invention is the novel construction of the slide fasteners,

permitting rigid assembly of two similar components with predetermined spacing and aligninent. Integral triangular tongues or projecjections 28 and 28' .of the respective slider plates 2| and 22 are bent inwardly of the plates, as illustrated in Figure 2. The thickness of triangular portions 28, 28' is the same as that of the The two slider sections are joined together across triangular portions 28, 28',

blanks in which a pulling a narrow strip from the center.

preferablyby welding. The interior spacing between front and back plates 2| and 22 becomes substantially twice the thickness of the sheet of which the plates are formed defining the required width for accommodating the slide fastener elements. A substantially broad area of or web 29' is formed on the underside of the loop. The pull tab (not shown), which is manually grasped to move the slider, is secured to loop 29 and is slidably pivoted and guided thereon in the conventional manner. I

In accordance with the present invention, front and rear plates 2|, 22 are similarly constructed. except that an additional step is used to form loop 29 in front plate 2|. The plates are successively formed in a blank strip 39 of suitable material, illustrated in Figure 3, in which V- shaped grooves, such as shown in Figure 5, are stamped in predetermined shapes for the individual plates. For each slider plate there is a groove 3|, transversely'of the sheet; two parallel grooves 32 at right angles to the extremities of transverse groove 3|; two diverging grooves 33 connecting with grooves 32; and convergin grooves 34 connecting with grooves 33. The outer ends of converging grooves 34 are a predetermined distance apart.

The next step in forming the slider plates is the stamping of the blanks to the shape indicated nection with Figures 1 and2. This is accomplished by. inverting and placing the stamped blanks of Figure 6 in die 31, 18 as shown in Figure 8. Female die portion 31 has a flat bottom 38, beveled bottom edges 39, and vertical sides. The punch or male die element 48 forces blank 2| into die member 31, as shown in Figure 9, formingangularly directed flanges or tracks 24 leading to straight flanges or tracks 21, and beveled edges 4| at the bottom of the blank. In the coining action of the dies the blank now takes on the appearance illustrated in Figures '7 and 9, wherein the metal displaced'in such operation is urged upwardly in reduction of the slope of the bevel from that originally indicated as a in Figures 4 and 8 to that indicated as b in Figures 7 to 9; the outer surface of tracks or flanges 24 and 21 being maintained in straight and smooth contour as the metal flows upwardly in Figure 9 to form the relatively reduced but nevertheless smooth bevel b, The punching or coining, al-

A guide rib- 2,'se7,sea V though shown insofar as it relates to one section.

ofasliderinl 'igureihisdoneforthe entirewall or track structure for each slider. and may be carried out in multiple for the successive sliders to provide the connected assembly shown in Figure 7. 1

By virtue of the formation of the beveled edges defined as a in Figure 4 and the transposition during the coining operation illustrated in Figure 8 of all the displaced metal in reduction of the beveled edge to the conformation indicated as track 24 'or 21, since all excess metal is displaced ,and flows in the reduction of the bevel asinb' in Figure 7, there is eliminated any formation of burrs or flash at the edges of the flange or dicated. The track or flange structure of the slider, as indicated in Figures 7 and 9, therefore has smooth wall surface formations both interiorly and exteriorly. Although a particular conformation of the chamfer defining the grooves in Figure 4 and the beveled edges of Figure 8 prior to coining is indicated as a preferred embodiment, it is within the province of my invention to vary the contour of the'chamfer and the'depth of the groove shown in section in Figure 5, so

that as the coining operation is carried out in; the manner illustrated in Figures 8 and 9, the

flow of metal will be along the exterior of the flange or track inextension of the wall surface and reduction of the beveled edge deflned by the chamfer.

The individual slider plates 2| (or 22) are separated along the apex of transverse V-groove 3|. The tongue 35 is cut oi! at its triangle apex, while tail-pieces 38 are detached, as indicated by the dotted lines of Figure '7. Projecting tongues 33 are thereupon bent-over inwardly to form the triangular projections 28, 28' of plates 2|, 22, as illustrated in Figure 2.

It is to be understood that the front and back slider plates 2| and 22, in accordance with the invention, are constructed with similar operations and the same tools and dies. Only one additional operation is required for completing the front or upper slider plate 2|, namelythe formation of loop. Loop 29 may be added to plates 2| while they are in the successive string formation, corresponding to the showing of Figure 6 or 10; or after separation, corresponding to the assembly shown in Figure '7.

A central punching operation outwardly of plate 2| causes loop 29 to project on the front side. Figures 10 and 11 illustrate the result of such operation. The inner edges of loop 29 are I then swaged at 42, 42 to form inner central rib 29' shown in cross-sectional Figure 13. Ribs 29' and swaged'edges 42, 42 may also be seen in the partially formed slider plates 2| of Figure 12.

The severing of tail-pieces 38 to complete the individual sliders is as previously described in connection with Figurefl.

The slider construction is completed by arranging tongue 28 of one front plate 2| and tongue 28' of one rear plate as against each other, as indicated in Figure 2 and shown in Figure 1. The tongues 28, 28' are thereupon welded or otherwise suitably fastened together. The thickness of tongues 28, 28' determine the spacing of the-plates, designed so that fastener elements will readily pass between them. he height of the flanges 24 is-predetermined to allow for the passageof the separable tapes between the opposed edges of the flanges, being somewhat less aae'nsea is to he understood that changes andmodiflcations may he made to its details of construction without departing from the general spirit and scope of the invention as set forth in the appended claims. p

I claim:

1. A slider for separable fasteners comprising separate front and rear plates, each having perpendicularly-directed guide tracks, an inwardly bent triangular tongue integral with and projecting'from an end of each of said plates disposed in parallelism with and extending against its corresponding plate with the'apex of each tongue triangle directed longitudinally of the slider, said plates and tongues being symmetrically juxtaposed and the respective tongues sesaid plates relative to each other.

2. A slider for separable fasteners comprising separate'front and rear plates of sheet material, each having perpendicularly-directed guide tracks, an inwardly bent tongue integral with each of said plates, each said tongue being of the same thickness as the plate sheet material cured to each other to rigidly space and hold and disposed in parallelism with and extending against its corresponding plate, said tongues being secured to each other for predeterminedly spacing and holding said plates relative to each other, said guide tracks being less in height than the tongue thickness whereby the opposed ends of the flanges are spaced from each other.

3. A slider for separable fasteners comprising separate front and rear plates of sheet material,

each having perpendicularly-directed guide tracks, an inwardly bent substantially triangular tongue integral with and projecting from an end offleach of said plates, each said tongue being of the same thickness asthe plate sheet material and disposed in parallelism with and extending against its corresponding plate with the apex of each tongue triangle directed longitudinally of the slider, said plates and tongues being symmetrically arranged against and secured to each other across the tongues thereof to predeterminedly space and hold said plates relative to each other, said guide tracks" being less in height than the tongue thickness whereby the opposed ends of the flanges are spaced from each other. MAURICE VOI'I'Y.

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