US2568163A

US2568163A - Slider for separable fasteners

Info

Publication number: US2568163A
Application number: US702600A
Authority: US
Inventors: Louis H Morin
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-10-11
Filing date: 1946-10-11
Publication date: 1951-09-18
Anticipated expiration: 1968-09-18
Also published as: GB622791A

Description

Sept. 18, 1951 L. H. MORIN SLIDER FOR SEPARABLE FASTENERS Filed 001:. 11, 1946 INVENTOR 100/5 6 Maw/v WW ATTORNEY Patented Sept. 18, 1951- UNITED STATES. PATENT OFFICE 2,568,163 SLIDER FOR SEPARABLE FASTENERS Louis B. Morin, Bronx, N. Y.

Application October 11, 1946, Serial No. 102,600

Claims. (01. 24-20515) This invention relates to sliders for use in coupling and uncoupling stringers of separable fasteners. More particularly, the invention deals with a die cast slider so formed as to produce a flared entrance for each stringer to the channel of the slider body to insure positive and free coupling engagement of the scoops one with the other and to materially ease movement of the slider along the stringers, particularly in the operation of coupling the stringers together. The novel features of the invention will be best understood from the following descriptions when taken together with the accompanying drawing in which certain embodiments of the invention are disclosed, and in which the separate parts are designated by suitable reference characters in each of the views; and in which:

Fig. 1 is a perspective sectional view of the inner surface of one wall portion of a slider made according to my invention.

Fig. 2 is a side view of a slider showing the entrance opening at one side of the slider body; and

Fig. 3 is a diagrammatic view showing the cores in exploded relationship to each other and with respect to a slider formed thereby, the latter being shown in section.

In sliders of the type and kind under consideration, it has been customary to form the walls of the slider body, or inner surfaces thereof substantially parallel with respect to each other, except for rounded corners at extremities of said walls. To insure reasonably free entrance of the stringer scoops into the channels of the slider between said walls, it has been essential to sufiiciently space the walls to accomplish this result without undue binding upon the stringer scoops. When the stringers are arranged in an irregular or wave-like fashion, difliculty has been experienced in freely operating the sliders along the stringers, particularly in coupling the same, the scoops tending to jam on the walls of the slider, blocking free action.

It is the purpose of my invention to so construct the walls of a slider, primarily the inner surfaces of the walls at the entrance openings, to, provide free entrance of the scoops of each "stringer, while at the same time, bringing the scoops into an alinement, insuring proper mesh or engagement of the scoops one with respect to the other, particularly when interlocking ele- "ments of the scoops require reasonably close alinement for proper coupling engagement. Still further one of the features of my invention resides in shortening the inturned flanges of the slider walls or the length of the resulting channel defined by such flanges, and to proportionately lengthen what is generally termed the double channel end of the slider, so as to reduce the over-all width of the slider, and at the same time, form a dart-like end defined by merging convexly concaved edges to the upper and lower walls of the slider, as most clearly illustrated in Fig. 3 of the drawing.

Considering now Fig. 2 of the drawing, here is shown a side view of a slider made according to my invention, the slider having a top wall l0, bottom wall ll, said walls at the contracted end thereof having relatively short inwardly extending flanges l2 and I3 defining the channel end ll of the slider, which controls coupling engagement between the scoops of opposed stringers. The stringers are not shown, as in this art, the fastener devices are well known and need no illustration.

The walls Ill and l I are joined at the other end of the slider by a connecting web I5 which is more or less of conventional cross sectional form. as clearly seen in Figs. 1 and 3. However, the outer rounded end portion l6 of the web is arranged in alinement with the converging convexly curved edges ll of the walls of the slider, for example, the wall H, as shown in Fig. 3, in forming a more or less dart shaped end to the slider body. The curved edges l1 unite or intersect at the outer end of the web I5 and conform to the round contour of the outer end of said web, as will readily appear from a consideration of Figs. 1 and 3 of the drawing. The walls l0 and ii substantially in longitudinal alinement with the web i5 have flat inner surfaces l8 which extend to the full width of the channel M, as indicated at H. It will be understood that the construction of both walls i0 and I l is the same, thus the brief description as applied to one wall, will apply to the other wall.

Beyond the flat parallel surfaces IB-i9, the walls l0 and I l taper in the direction of the edges l1 and the flanges i3, as indicated by the bevelled shaded sections 2020 at opposed sides of the slider and bordering the entrance opening 2 l2 i between the web i5 and the flanges l3. The taper of the portions 20-20 becomes steeper or more abrupt at its approaches the web, as indicated by the heavier shading at 22-22 on the wall i I and also by the shading 23', as appearing on the wall l0 in Fig. 2 of the drawing. In other words, the pitch or slope of each opening 2I-2l' is greatest adjacent and at opposite sides of the web l5 and gradually decreases in the direction of the flanges l3. It has been found that, by so forming and correlating the slopes of the slider assesses surfaces, scoops which otherwise tend to jam' and fail to enter the slider as the result of approaching it from the side rather than in direct alinement with the openings, are caused to rotate into alinement and to enter the respective openings smoothly and in position with respect to each other to insure free and easy coupling engagement. In this respect, the tolerances of the surfaces It may be more closely maintained than was heretofore possible with the adjacent inner surfaces of conventional sliders. In other words, the space or distance between the flat surfaces Hi can be reduced to fit the scoops more closely. It will also be understood that the flared wall portions provide a free and easy entrance of the scoops through the entrance openings 2 l-2 I into the single channel portion of the slider.

In forming the slider, as a die cast member. the same is formed between a pair of dies employing core members, such as diagrammatically shown at 26 and 25, the core member 2% comprising a pair of fingers 26 shaped to form the bevelled or flared surfaces 20-20' and 2222', as well as the surfaces 23', one of which is shown in Fig. 2. The members 26 are spaced apart by the opening 2?, the base of the opening having a curvature, as at 28 forming the curved or rounded surface it of the web l5 and having slight shoulder portions, as at 29, at the greatest diameter of the curvature l6 so as to provide free pulling of the core 25. The other core 25 is in the form of a bar having an inner V-end 30 forming the inner V-shaped contour 3| of the web l5 and the arms defining the V 30 have chamfered ends 32 which fit in the shoulders 29, the core 25 forming the flat opposed surfaces l 8 on the slider walls It and H, as will be apparent. The base or outer end of the core 25 is enlarged, as seen at 33, to form the wide surface l9, as will be apparent.

By reason of the tapers 20-20, which extend to the full width flat surfaces I 9 on the slider walls, the flanges l2l3 will have a greater depth at their inner ends than at their outer ends. This is clearly indicated by the dotted lines 34- 35, as seen in Fig. 2 of the drawing, which indicates the extension of the curved or flared surfaces 20-20', and these curved lines are also indicated by the reference character 35 upon the slider wall H, as seen in Fig. 1 of the drawing. It will also be apparent that the curvatures of the flared surfaces 2020' and 2222 are such as to provide free Pulling of the core 24 after the casting has been formed. Sliders may be cast in suitable metal or in plastic materials. It will be apparent that the particular structure of the slider aside from the walls defined by the cores may be modified to suit difierent uses. In the present disclosure the dies, not shown, are fashioned to form on the top wall I0 an elongated loop 35 for attachment of a suitable pull.

It will be apparent that the bevelled or flared surfaces 20-20 and 2222, including corresponding surfaces of the opposed slider wall blend into the flat surfaces l8 and I9, and the bevel or flare produces entrance openings or throats at the sides of the slider body which have their greatest width at the curved edges l1. It will also appear that the entrance openings are substantially equal in length to the length of the flanges 12-13. In other words, the flanges extend longitudinally of the slider a distance substantially equal to one-half of the over-all length .of the slider, distinguishing in this respect from have extended greater than one-half the over-all length of the slider. These structural features result in producing a slider of what I term the non-fouling type, and which will freely guide scoops of stringers into the slider body and insure proper alinement and coupling at the position defined by the substantially parallel flat surfaces IBI9. These surfaces may define what is termed a restricted passage through the slider body. It will also be understood that my improved slider construction minimizes the area of surface engagement of the slider with the stringer scoops in minimizing the area of the substantially parallel surfaces l8 and 19.

From a description standpoint, my improved slider may be said'to have hopper or funnel like admission openings for guides of the scoops into the slider body preparatory to coupling or meshing the same.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A slider of the kind consisting of walls united by a web at one end and having flanges extending along side edges of the walls at the other end thereof, in which: the inner face of each wall is formed with a central flat portion extending longitudinally from the web to the said other end of each wall, the said flat portion being bounded on each side by a bevel surface extending longitudinally from the web to a point between the flanges intermediate the flange ends, and each bevel surface extending transversely from the central flat portion to the adjacent edge of each said inner face.

2. A slider of the kind consisting of walls united by a web at one end portion and having flanges extending along side edges of the walls at the other end portion thereof, in which: the inner face of each wall is formed with a central flat portion extending longitudinally from the web to the said other end portion of each wall, the said flat portion being bounded on each side by a bevel surface extending longitudinally from the web to said other end portion, and each bevel surface extending transversely from the central flat portion to the adjacent edge of each said inner face. the pitch of the bevels being steepest adjacent the sides of the web.

3. A slider for separable fastener stringers comprising two walls spaced and joined b a connecting web at the forward end portion of said walls, the back end portion of each wall having opposed curved flanges, the walls of the slider beyond the flanges having convexly curved edges which intersect at said web, inner surfaces of the slider walls from the web to the back end portion of said walls having flat and substantially parallel sections of a width substantially coextensive with the greatest width of the web, said slider walls also having inner surfaces at each side of said flat surfaces which flare outwardly to said convexly curved edges of the slider walls, and said section of each wall being separated from the forward portion of the flanges of the wall by said flaring surfaces.

4. A slider for separable fastener stringers consisting of a pair of spaced upper and lower walls united at their forward ends by a web, each wall at the rear portion thereof having a flange at each side edge, each said flange extending from the rear end of the wall forwardly a substantial distance thus forming a pair of stringer-receiving channels one on each side of the web, the upp r and lower walls of each channel having inner opposed sunaces which slope towards each other, said sloping of the surfaces occurring at the channel entrance and continuing into the channel for a substantial distance transversely thereof with the slope being steepest at and adjacent the said entrance, said sloping extending longitudinally of the channel to a point beyond the adjacent ends of the channel flanges, and each wall on its said inner surface having a central longitudinally extending flat portion which is spaced from said flanges and which intersects the sloping surfaces on each side of the web.

5. A slider for separable fastener stringers consisting of a pair of spaced upper and lower walls united at their forward ends by a web, each wall at the rear portion thereof having a flange at each side edge, each said flange extending from the rear end of the wall forwardly a substantial distance thus forming a pair of stringer-receivlng channels one on each side of the web, said channels having their entrances at the forward end of the slider, said upper and lower walls each 6 having on their inner opposed surfaces a central flat portion which extends longitudinally from the web to the said rear portion of each wall and which is spaced from the flanges on each wall throughout a substantial part of the length of said flanges, said fiat portion being bounded on each side thereof by a bevelled portion which extends from the fiat portion to the adjacent extremities of the wall including the entrances to said channels, and the bevel of each bevelled portion being greatest at the said entrances.

LOUIS H. MORIN.

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

UNITED STATES PATENTS Ulrich Apr. 27, 1937