US2264327A - Separable fastener - Google Patents

Description

Dec. 2, 1941. L.. H. MORIN SEPARABLE FASTENER Filed March 3l, 1959 INVENTQR J. awa" MoH/lv ATTORN EY Patented Dec. 2, 1941 l Louis H. Morin, Bronx, N. Y., assignor to Whitehall Patents Corporation, Bronx, N.- Y., a cor- -poration of N ew York Application March 431, 1939, Serial N o. 265,092`

4 claims. (c1. zag-205) This invention relates to separable fasteners comprising stringer tapes with' coupling links thereon, with a slider movable along the stringers to couple and uncouple the links. More particularly, the invention relates to the construction of the stringer tapes and especially the edge portion of the tape to which the links are attached or applied, as well as the method of constructing the fastener stringers in a continuous operation .in accordance with Athe meth'od dened. The novel features of the invention will be best understood from the following description and annexed 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: y

-Fig. 1 is a plan view of a part of a separable fastener, made according to my invention.

Fig. 2 is a diagrammatically sectional view illustrating the method of applying links to a stringer tape made according to the invention. Fig. 3 is a sectional view substantially on th'e broken line 3-3 of Fig. 2.

Fig. 4 is an enlarged sectional view lon the line 4 4 of Fig. 2.

Fig. 5 is an enlarged perspective View of a part of a stringer tape showingone adaptation of the invention.

Fig. 6 is a ,view similar to Fig. 'showing another adaptation of the invention; and,

Fig. 7 is a cross-sectional View of a strip such:

as shown in Fig. 6 illustrating a link arranged thereon.

To illustrate the type of device in connection with which my invention relates, I have shown in Fig. 1 of the drawing a part of a separable fas'- tener consisting of two'stringer vtapes I0, Illa.' Arranged longitudinally of one edge portion of the tapes I0, Illa are cords or strands II, Ila forming enlarged or beaded edges on said tapes. At I2, I2a are shown coupling links or scoops attachedto the beaded edges of the tapes in spaced relationship and in such manner that the stringers may be coupled and uncoupled by a slider I3 movable longitudinally thereof, as in other devices of this kind. At I4 is `shown an end stop at one end of the tapes for coupling the tapes togetherand for limiting the movement of the slider in one direction on the stringers. At I5 is shown part of a pull coupled with the slider to facilitate operation thereof.

In carrying my invention into eiect, I may simply use plain cords or strands, of any type th'e edge'portion of the stringer tape. In attaching certain types and kinds of links to the tape, it is desirable to use cords or strands including either a wire or a rayon or other strand,

5 spirally wound o n the cords or otherwise forming a part thereof, to be exposed at suiciently close intervals to contact each of the links applied theeto. In employing a metal strand or wire, this is employed to facilitate electroplasting 1&0 of. metallic links attached to the stringer tapes,

i whereas in using rayon or other strands these are employed to facilitate a more secure attach'- ment of plastic or thermoplastic links applied to the tape. In Fig. 5 of the drawing apart of the stringer tape IIJ is shown, and II represents the cords arranged on opposite surfaces of the tape I0 at the edge portion VIIi thereof, and at II is indicated the wire or rayon strands spirally wound upon the cords II. The edge I6 of the tape may be made slightly enlarged in the process of weaving the same so as to retain the cords II against displacement after the -links have been applied as later described. However,v in some instances and wh'ere pressure is applied to the cords in attaching the links thereto, the enlargement 0f essential. f

Contrasting to the result of the arrangement ,shown in Fig. 5, in Figs. 6 and 7 of the drawing is shown a stringer tape lob, upon which plain cords IIb are arranged, and substituted for the strands I1 is what is termed a tinsel strand I8 which consists of .nothing more or less than a fine. cotton or oth'er cord upon which is spirally Wound a wire i9. It will be apparent, however, that the winding on the strand I8 may be in the form of a rayon or other thread. The strand I8 is laid longitudinally of the edge Ilia of the tape so that the strand I8 .or the wrapping I9 thereon will be exposed for contact with each of the of Fig. FZ of -the drawing.

At this pointit will be well to mention that,4

while the cords orstrands II are shown as wound in cross-sectional form, they may in actual practice assumefan irregular contour'Qby virtue of the compression of the links thereon, and in vsome instances this would operate to compress the strip to form slight depressions therein as indicated at 20 in Fig. 7 of the drawing. The links of the separable fastener may be formed in any desired manner and attach'ed in any way, but

in making these links as die castings, they may4 be cast directly upon the tape as is now well and kind of material arranged longitudinally oi 56 known in'this art.

the edge I6 willl not bel links or scoops applied to the strip IIlb as at I2b To illustrate one method of carrying the invention into effect, I have shown in Figs. 1, 2, 3, and 4, more or less diagrammatically, parts of the machine forming the subject matter of my prior application Ser. No. 189,309, led April 8, 1938. In Fig. 2, 2| represents the upper, discharge end, of a gooseneck 22 forming the dis-A charge nozzle through which the casting material is injected into the impression 23 of relatively movable dies 28, 24a supported'in die operating members 25, 25a, part of which are shown in Figs. 2 and 4. The dies 24, 24a are so con.- structed as to receive a Stringer tape I0 as Well as the beaded edge formed by the cords I I there.- on, the latter entering the impression 23 to facilitate the formation of the cast links I2 thereon. A core pin 26 is also supported .by the dies, 26, 24a and extends into the impression 23 so that each casting I2 is formed thereon, and this pin movable by its supporting arm 26a serves to feed a cast link as well as the tape for the close spacing of the links on the tape, as taught in the application hereinbefore referred to. The wide spacing of the links or groups of links on the tape, as for example at 21, Fig. 2 of the drawing is accomplished by a tape feeding mechanism 28 supported through the medium of a bracket 29 on an operating rod 30, the mechanism 2B having grippers 3I for engaging and feeding the tape I0 in the wide spacing of the tape, again asV taught in said prior application. These struccompressed and otherwise attached to the tape,

tures are here illustrated simply to show one method of carrying my present invention into effect. At 321s shown a guide roller or spool over which the tape I0 passes and this tape is guided through the feed mechanism 28 prior to entering the dies 24, 24a. According to my present invention, I also employ other suitable guide rollers 33 for guiding the strands or cords II onto opposite surfaces of the tape I0 at one edge portion thereof. The mechanism 28 will serve to maintain the proper location of the cords II with respect to the edge I8 of the tape in entering the impression 23 of the dies, the said mechanism having aY downwardly extending portion 28a which terminates in close proximity to the dies 24, 24a as will be apparent.

From the foregoing description, it will be apparent that the cords or strands II, IIb, are simply guided into and through a machine employed for attaching links or scoops to one edge of the tape without attaching the cords to the tape other than through the medium of said links. This eliminates the necessity of using expensive Stringer tapes where the enlarged or beaded edges are integrally woven with the tape in the production thereof, or where such enlarged portions are formed by cords or strands stitched suitable means will be. provided for guiding the tape and strand into machines of this type and kind. e

It will be understood that the cords or strands II, IIb maybe composed of any suitable material and of any desired. cross-sectional form. In some instances these strands may in their entirety be composed 'of a Wire 4preferably of the flexible type. In other Words, my invention does not depend upon any particular type of vstrand or any particular structure thereof, but rather in the laying of some type or kind of elongated strip or strand longitudinally over one edge portion of a tape for the purpose of enlarging this 'edge portion to form what is commonly referred to as a beaded edge' which aids in securing the links against displacement from the tape. While I have shown in the accompanying drawing, two strands laying one at each4 side portion of the tape, it will of course be apparent that a single strand may be employed.

In forming die cast links upon a tape of the kind here under consideration and especially when the links are composed of metallic castings, it will be understood that the molten metal will extend into the interstices of the braid of the tape, as Well as into the interstices or crevices of the strands arranged thereon to secure and support the links in position. `This result is accomplished by virture of the pressure injection of the heated molten material into the impression of the dies. It will be apparent that in attaching links of any kind to the corded edges of the tapes, as disclosed, sufficient friction is established between the cords and the tapes to securely retain the links against displacement. This is-'further amplified by reason of the enlargement of the edge I5, I6a of the tape. Therefore the tapes become as strong as other types and kinds of beaded edge tapes.

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

y. l. In a separable slide fastener comprising fastener stringers adapted to be coupled and uncoupled by a slider movable longitudinally thereof, each of said stringers comprising a woven Stringer tape, an independent strand loosely arranged longitudinally of one edge vof the tape in forming a beaded edge on the ta'pe, die cast coupling links fashioned directly to the Stringer tape. It win thus be seen that a very economical way of tape construction is provided and as the tape cost is one vof the outstanding costs in the manufacturing of fasteners of the type andkind under consideration,

it will appear that a material saving will be effected by constructing a device in accordance with the method herein dened.

In employing the construction shown in Fig. 6, it will of course be apparent that the tape guide will be constructed so as to receive and guide the strand I8 for proper location on the outer surface of the edge I6a and suitable means will be provided for guiding the strands into a machine.

It wil be understood that while I have shown, in Figs. 2, 3, 4, one method of constructing and in supporting the strand on the tape, the cooperatingcontour between the strand and the Weave of said tape being such as to retain the strand against displacement therefrom, and said `strand including a spirally wound element arranged on said strand with the spirals of said v,element exposed' and arranged in close proximity I to each-other, whereby each link of said stringer will -contactat leastA one spiral turn of said element.

2. In a, separable slide fastener comprising fastener stringers adapted to be coupled'and uncoupled by a slider movable longitudinally thereof, each of said stringers comprising a stringer tape, anindependent strand loosely arranged longitudinally of one edge of the tape in forming a beaded edge on the tape, coupling links secured to said edge of the tape and engaging said strand in supporting the strand on the tape,

to the tape, that this is solely to ilon said edge of the tape at spaced intervals longli tudinally thereof, said links extending onto both surfaces of the tape in a clamping manner serv- -ingto embed said cords in the surfaces of said tape, portions of said links penetrating into the interstices of said tape and cords preventing relative movement thereof, and at least one of said cords having a strand spirally arranged thereon and exposed for contacting each of saidlinks, thereby facilitating predetermined iinishing treatment of said stringer.

4. A Stringer for separable fasteners of the character described, vsaid Stringer comprising a tpe, a plurality of strands loosely arranged longitudinally of one/edge portion of the tape,V said strands being attached to the tape solely by links die cast directly on said 'edge of the tape at spaced intervals longitudinally thereof and extending onto both surfaces of the tape, atleast two oi said strands being arrangedon opposite surfacesl v of the tape, and at least one of said strands including a spirally arranged' element having spiral turns exposed thereon suiiiciently close to insure lengagement with each link on said stringer, thereby facilitating predetermined iinishing treatment of the Stringer. A

' LOUIS H. MORIN.

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