|Numéro de publication||US3522637 A|
|Type de publication||Octroi|
|Date de publication||4 août 1970|
|Date de dépôt||6 mars 1968|
|Date de priorité||6 mars 1968|
|Autre référence de publication||DE2027922A1, US3655855|
|Numéro de publication||US 3522637 A, US 3522637A, US-A-3522637, US3522637 A, US3522637A|
|Inventeurs||George C Brumlik|
|Cessionnaire d'origine||George C Brumlik|
|Exporter la citation||BiBTeX, EndNote, RefMan|
|Citations de brevets (10), Référencé par (146), Classifications (13)|
|Liens externes: USPTO, Cession USPTO, Espacenet|
Aug. 4,' 1970 G. c. BRUMLIK SELF-GRIFFING FASTENING FILAMENT Filed March 6, 1968 i sx F/6.2 Z0 rrramrammn-mrammmmmlm INVENTOR. GEORGE C. BRUMLIK ATTORNEY g 3,522,637 SELF-GRIPPING FASTENING FILAMENT George C. Brumlik, 154 Upper Mountain Ave,
Montclair, NJ. 07042 Filed Mar. 6, 1968, Ser. No. 710,972 Int. Cl. A4411 11/25, 17/00 US. Cl. 24204 6 Claims ABSTRACT OF THE DISCLOSURE The present invention relates to fastening devices and in particular to a novel and improved fastening filament which is operative to releasably grip an opposing fabric or other article in a self-adhering action.
Various self-gripping fasteners, particularly suitable for releasably fastening fabrics and the like are presently available. Typical of such fasteners is a self-gripping fastener assembly presently marketed under trademark Velcro which is in the form of pairs of fabric strips which are suitable secured to the opposing fabrics to be fastened together. The Velcro fastener comprises multiple rows of small vertically-extending open plastic loops secured to the outer surface of one of the matching strips while matching small plastic hooks are secured to the outer surface of the opposite strips. Thus, when the two opposing strips are perss-contacted the hooks link with the opposing loops in an interlocking action, and when pulled apart with sufficient force, the hooks disengage from their corresponding loops.
While the Velcro fastener provides an effective gripping action, the cost of manufacture thereof is relatively expensive. Furthermore, the Velcro type grip inherently requires that both of the opposing surfaces be provided with matching strips in order to effect an interlocking grip.
It is, therefore, an object of the present invention to provide a fastener device which is integrally made as part of a thread or filament which is then employed either in filament form or in yarn form to form a fabric, felted surface or the like, the latter being self-adhering. The device is relatively inexpensive and simple to manufacture and does not require that an opposing penetrable article to be gripped be provided with any fastening means.
Another object of the present invention is to provide a fastening device of the character described in which fabric or felted surfaces formed by the device may be attached to opposed surfaces by the simple application of pressure thereon and may be released by pulling the surfaces apart with sufficient force.
A further object of the invention is the provision of filaments with self-contained fastening means, the fastening means being so constructed and arranged that they are initially retracted so that the filament may be handled in the normal manner and spun into yarn or otherwise employed for forming fabric or felted surfaces. The fastening means may then be treated to open up, forming a self-adhering surface.
In accordance with the principles of the present invention there is provided a self-gripping fastening filament ed. States Patent 3,522,637 Patented Aug. 4, 1970 for releasably gripping an opposing article. The fastening filament is made of flexible material and comprises an elongated body having a series of sharp-edged hooks, each extending from the elongated body; with the filament hooks being spatially staggered along the length of the filament body. The filament hooks when pressed against an opposing penetrable surface of the article is operative to penetrate and lodge in said article to thereby grip the article in a self-adhering action.
Additional objects and advantages of the invention will become apparent during the course of the following specifications when taken in connection with the accompanying drawings, in which:
FIG. 1 is a perspective view of a sheet of extruded plastic having a suitable profile for forming a plurality of filaments which include integral fastening elements of a releasable fastener type in one embodiment of the present invention;
FIG. 2 is an elevational view of a filament having a plurality of integral releasable type of fastening elements, the filament being formed by chopping or cutting through the profile of the extruded sheet of FIG. 1, and then being treated to cause the filament hooks to partially open;
FIG. 3 is an enlarged elevational view of a length of yarn formed by spinning a plurality of filaments of the type shown in FIG. 2, the filament hooks being shown in closed condition;
FIG. 3A is an enlarged elevational view of a length of yarn similar to FIG. 3, but showing the yarn after treatment to cause the filament hooks to open;
FIG. 4 is a plan View of a piece of fabric formed by weaving a plurality of the yarns shown in FIG. 3, and then treating the fabric to cause the filament hooks to partially open;
FIG. 5 is a plan view of a piece of felted fabric or surface formed by felting the yarns of FIG. 3 and then treating them to cause the filament hooks to partially open;
FIG. 6 is an elevational view, on an enlarged scale, of a modified form of fastening element filament which may be formed by chopping or cutting through the profile of an extruded sheet;
FIG. 7 is an elevational view of the filament of FIG. 6 after having been treated to cause the stem portions thereof to be rendered erect and the hooks extending therefrom to open;
FIG. 8 is an elevational view, on an enlarged scale, of another modified embodiment of fastening element filament which may be formed by chopping or cutting an extruded sheet having a corresponding profile; and
FIG. 9 is an elevational view of the filament of FIG. 8 after having been treated to cause the filament hooks to open.
Referring in detail to the drawings, there is shown in FIG. 1 a sheet fo plastic 10 which is extruded in the profile shown with a pair of series of spaced flutes 12 and 14 each having a truncated and relatively sharp edge 24 extending above and below sheet 10. As shown in FIG. 1, in a preferred form, the upper series of flutes 12 is spatially staggered with respect to the lower series of flutes 14, across the width of sheet 10.
Fastening elements in accordance with the principles of the present invention may be formed by chopping or cutting through a profiled sheet, such as sheet 10, for example, in very thin sections as indicated by the cut lines 16, to produce fastening element filaments exemplified by filament 18 shown in FIG. 2. As shown in FIG. 2, filament 18 is initially formed with the profile of extruded sheet 10, with an leongated body 20 preferably having a width approximately equal to the thickness of sheet 10, and a series of inwardly curved hooks 22 corresponding to flutes 12 and 14. These hooks 22 may be transformed from their closed condition as shown by the profile of sheet in FIG. 1 to the partially open condition as shown in FIG. 2 when subjected to heat, mechanical, or chemical treatment. The degree to which the hooks are opened may be varied by selective control of the heat, mechanical, or chemical treatment to which the hooks are subjected. It is understood that filament 18 is of the usual filament-like thickness, so that stems 20 as well as opened hooks 22 are relatively flexible, whereby a plurality of filaments 18 may be easily spun together to form a yarn to be subsequently interwoven, or felted together as hereinafter described.
With the hooks 22 in closed conditions, the filaments 18 may be spun together to form a yarn 26 (FIG. 3) which may thereafter be subjected to heat mechanical or chemical treatment to cause hooks 22 to open, as shown in FIG. 3A. The yarn 26 may serve various purposes. For example, a single length of the yarn may be woven into regular fabric and its hooks opened to provide a zipper-type closure line in the fabric. In addition, a plurality of yarns 26 having open hooks 22, may be matted together in a felting operation to form a felt fabric 28 having extending hooks 22, as shown in FIG. 5, in one embodiment of the present invention. In the felting operation when yarns 26 are pressed together, the flexible hooks 22 engage contiguous yarns to form a skeined array of interlocking yarns as shown in FIG. 5.
In another embodiment of the present invention a plurality of filaments 18 with opened hooks 22 may be matted together in a felting operation causing hooks 22 to engage the bodies 20 of contiguous filaments to form a skeined array of interlocking filaments 18 (not shown) somewhat similar to the skeined array of interlocking yarns shown in FIG. 5. It is also possible to arrange a plurality of yarns or filaments with closed hooks loosely in a skeined array and then to treat them so that the hooks open up and interlock to provide a felted surface.
In yet another embodiment of the present invention, a plurality of yarns 26 with hooks 22 in the closed condition, are interwoven to form a fabric, and the fabric is then subjected to heat or chemical treatment to cause hooks 22 to open or partially open, resulting in a woven fabric 30, as shown in FIG. 4.
The resulting fastening fabric formed by felting individual filaments 18 (not shown), by felting yarns 26 as shown in FIG. 5, or by weaving yarns 26 as shown in FIG. 4, may be suitably secured such as by stitching, by its own self-gripping action ,or by means of adhesive to one of the article surfaces to be releasably fastened. A particular advantage of the invention is that if the article is of soft or frangible nature, the fastening fabric or single strand of yarn can be attached thereto by its self-adhering action without requiring additional fastening means. If the opposed material to be releasably fastened is made of a fibrous material such as suede, plastic, foam, felt, etc., the fastening fabric of the present invention will grip the opposing material when the opposing materials are pressed together with sufficient pressure to cause the exposed hooks 22 to engage opposing fibers of the material to be fastened. If the articles to be releasably fastened are smooth or impenetrable by the fastening elements, then the fastening fabric of the present invention may be suitably secured to the opposing article surfaces, and when pressed together, the hooks 22 will engage opposing fastening fabric yarns 26 or filament stems 20 as the case may be, in addition to engaging opposing hooks 22.
The further embodiments of the present invention as shown in FIGS. 6-9, are illustrated by way of example to demonstrate that the filaments for forming the fastening fabric of the present invention may have extending hooks of various shapes.
In the embodiment of the present invention shown in FIG. 6, filaments 32 may be formed by chopping or cutting through an extruded sheet of plastic (not shown) having a profile or cross-section corresponding to the shape of filament 32, in a manner similar to that described above with respect to FIGS. 1 and 2. Filament 32 comprises an elongated body 34, having sharp edged hooks 36 extending from opposite sides thereof in staggered configuration at spaced intervals along the length of body 34. Each of the hooks 36 has at least one pair of sharp-edged curved barbs 38 extending in opposite directions from the stem portion 40 of hook 36, with the pointed tip 42 of each barb 38 being curved inwardly toward stem portion 40.
As described above with respect to filaments 18 of FIG. 2, filaments 32 may be subjected to heat, mechanical or chemical treatment to cause hooks 36 and barbs 38 extending therefrom to open to the erect condition as shown in FIG. 7. Filaments 32 in the erect condition shown in FIG. 7 are particularly suitable to be felted together in a manner similar to that described above with respect to filaments 18, to produce a felt fastening fabric somewhat similar in overall appearance to the felt fabric 28 of FIG. 5.
In other applications, filaments 32 in the closed condition of FIG. 6 may be spun together to form yarns which may be interwoven and subsequently subjected to heat or chemical treatment to cause hooks 36 and barbs 38 to open, in a manner similar to that described with respect to FIGS. 3 and 4. Similarly, filaments 32 or yarns formed thereof, may be treated to open hooks 36 and barbs 38 and then felted in the manner previously described to form a fastening fabric somewhat similar to that of FIG. 5.
In the embodiment depicted in FIG. 8 filaments exemplified by filament 44 may be formed by chopping or cutting through an extruded sheet of plastic (not shown) having a profile corresponding to the shape of filament 44, in a manner similar to that described above. Filament 44 comprises an elongated body portion 46 having pairs of sharp-edged hooks 48 extending from opposite sides of stem 46, with the pointed ti 50 of each hook 48 being curved inwardly toward stem 46.
In a manner similar to that described above with respect to filaments 18 and 32, filaments 44 may be subjected to heat or chemical treatment to cause hooks 48 to open to the erect condition shown in FIG. 9, wherein filaments 44 are particularly suitable to be felted together to form a felt fastening fabric somewhat similar to that of FIG. 5. Again, in another embodiment, filaments 44 with hooks 48 in the closed condition of FIG. 8, may be spun to form yarns similar to that shown in FIG. 3, which yarns may subsequently be interwoven and subjected to heat, mechanical or chemical treatment to cause hooks 48 to open, or the yarns may be treated to cause hooks 48 to open with filaments 44 then being felted in the manner of FIG. 5 to form a fastening fabric.
While preferred embodiments of the invention have been shown and described herein, it is obvious that numerous omissions, changes and additions may be made in such embodiments without departing from the spirit and scope of the invention.
What is claimed is:
1. A self-gripping flexible fastening filament for releasably gripping an opposing article comprising an elongated body having a series of sharp-edged hooks integral with and extending from said elongated body, said filament hooks being spatially staggered along the length of said filament body and each extending perpendicularly from said filament body and having a free end portion which curves back toward the axis of said filament body, said filament hooks when pressed against an opposing enetrable surface of said article being operative to penetrate and lodge in said article to thereby grip said article in a self-adhering action.
2. A self-gripping fastening filament according to claim 1 wherein each of said hooks includes sharp-edged curved barbs extending therefrom.
3. A self-gripping fastening fabric for releasably gripping an opposing article comprising a plurality of flexible filaments, each of said filaments comprising an elongated body having a sries of sharp-edged hooks integral with and extending from said elongated body, said filament hooks being spatially staggered along the length of said filament body and each extending perpendicularly from said filament body and having a free end portion which curves back toward the axis of said filament body, whereby when said fastening fabric is pressed against an opposing penetrable surface of said article, said filament hooks are operative to penetrate and lodge in said article to thereby grip said article in a self-adhering action.
4. A self-gripping fastening fabric according to claim 3 wherein said fabric is formed by weaving yarns forme-i by said filaments.
5. A self-gripping fastening fabric according to claim 3 wherein said fabric is formed by felting yarns formed by said filaments.
6. A self-gripping fastening fabric according to claim 3 wherein said fabric is formed by felting said filament.
References Cited UNITED STATES PATENTS Geier.
Hall 161-180 X Alcamo.
Parker 24-204 X De Mestral 24-204 X Robie.
Scragg 161-179 Parker.
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|Classification aux États-Unis||24/445, 24/451, 24/449, 57/206|
|Classification internationale||A44B18/00, D03D23/00|
|Classification coopérative||D03D2700/01, A44B18/0038, D03D23/00, A44B18/0015|
|Classification européenne||D03D23/00, A44B18/00C6, A44B18/00D8|