US2137814A - Fabric covered elastic attaching device - Google Patents

Description

Nov. 22, 1938. H, SKORA 2,137,814

FABRIC COVERED ELASTIC ATTACHING DEVICE Filed June 29, 1957 I Ma l element is manually Patent ed Nov. 22, 1938 PATENT OFFICE memo COVERED ELASTIG ATTAGHING DEVICE Hyman Skora, Brooklyn,

N. assignor or onethird to S. & E. Novelty Co. Inc., New York,-

N. Y., a corporation of L. & L. Linings Inc.,

New York, one-third to T New York, N. Y., a corporation of New York, and one-third to Ellenstein-Gerber C0rp., ration of New York New York, N. Y., a corpo- Application June-29.1937, serial No. 151,061 3 Claims. '(01. 24-143) This invention relates to attaching devices with particular reference to elastic filaments and penetrating securing tabs therefor.

One object of the invention is to provide a :device of the character described which shall have improved means to prevent an end of the elastic from projecting and thus obstructing the insertion of the tab into a fabric.

In these devices, anend portion of the elastic placed in a channeled tab,

and the latter deformed into generally tubular form to grip the elastic. Due to the difficulty of reliably holding or feeding such tabs in quantity, no machines have been devised to automatically if perform the assembling operation. In placing the end portion of the elastic in a channeled tab, theoperator relies upon his eye, and generally the end'portion of the elastic projects at the tab point to form an obstruction when the tab is caused to forcibly pierce through a fabric.

It is an object of the invention to avoid this defect and also to provide a tab which the operator can assemble with the elastic at a greatly increased rate of speed.

When an elastic filament is compressed. it becomes elongated, so that an end thereof tends to form a projecting obstruction at the tab point. This also renders gaging by eye more difficult in placing the elastic in the channeled tab.

It is therefore another object of the invention to avoid this difficulty by providing positive limiting or positioning means for the elastic and which shall serve to confine the elastic to prevent it from being squeezed out near the tab point.

production basis may still leave something to be desired. Hence improved means has been devised that will cause the elastic to elongate rearward,

and,xpreferably, progressively to the rear ofthetab point as the dieis exerting pressure on the tab as a whole.

1 It is. desirable to avoid the necessity for clamping the tab so tightly as to cause cutting of the rubber and consequent loosening of the elastic in the tab. Hence serrations are employed for 'affording multipoint engagement with the fabric away from the tab point, as the elastic is being clampingly compressed in the covering of the elastic. The serrations desirably afiordstaggered points for offset pressure areas.

Since the points of the serrations may sometimes catch on a fabric through which the tab is being inserted, it may be desirable in certain cases to afford a straight edge portion protect ively overlying the serration points and holding them in engaging position. 7

It istherefore a further object of the invention to furnish a device of the nature set forth which shall avoid the difficulties and realize the advantages mentioned and which shall have few and simple parts, and be adapted for inexpensive manufacture and assembling and be durable, thin, compact, reliable and eflicient to a high degree in use.

Other objects and advantages of the invention will become apparent as the specification proceeds.

With the aforesaid objects in view, the invention consists in the novel combinations and arrangements of parts hereinafter described in their preferred embodiments, pointed out in the subjoined claims, and illustrated in the annexed drawing, wherein like parts are designated by the same reference characters throughout the several views.

In the drawingi Figure 1 is a sectional view of a hat showing a typical application of my invention.

Fig. 2 is a fragmentary plan view of the device.

Fig. 3 is an enlarged sectional view taken on line 3-3 of Fig. 2.

Fig.- 3a is an enlarged cross section on the line 3d-*-3a of Fig. 2.

Fig. 4 is a plan view of the blank from which the tab thereof is formed.

Fig. 5 is a fragmentary plan view of a device showing a further improvement according to the invention.

Fig. 6 is a longitudinal sectional view thereof.

Fig. 7 is a top plan view thereof.

Fig. 8 shows the-same in course of being assembled.

Fig. 9 is a plan view showing a modified form of the invention.

The advantages of the invention as here outlined are best realized when all of its features and instrumentalities are combined in one and the same structure, but, useful devices maybe produced embodying less than the whole.

It will be obvious to those skilled in the art to which the invention appertains, that the same may be incorporated in several different constructions. The accompanying drawing, thereexcessive clamping pressure 2 fore, is submitted merely as showing the preferred exemplification of the invention.

Referring in detail to the drawing, ll! denotes a device embodying the invention. The same may illustratively include a hat H consisting, at'least at the brim, of two or more fabric layers I2, 13, between which are disposed are secured at the ends of a fabric covered elastic filament IS. The element and one or more of the elements l4 may constitute the holding device with which this invention is concerned. In the present instance, this device serves to reliably hold on the wearers head a relatively shallow hat. The latter may be constructed with any elastic, and the tabs l4 caused to pierce and pass through the fabric l3 to thus anchor the elastic IS in place.

Fig. 2 shows the tab H as comprising a generally tubular clamping section IS, a point I! at one end and a channeled guide l8 at the opposite end. The section i6 is split and is formed with serrations l9 at one or both edges of the split to bite into the woven textile fabric covering 20 of the rubber filament 21, whereby the elastic element I5 is reliably secured without causing such as may serve to cut or granulate the rubber 2|. It will be noted that the covering 20 is stretchable, but the serrations l9 afford multi point pressure contact therewith so as to bite into the fabric and avoid cutting the rubber by excessive pressure at any one point.

' the fabric.

tion away from the point l1.

"parts I'I,

Desirably the serrationsare staggered as shown to provide offset pressure areas at successive points along or on opposite sides of the axial line of the elastic l5 for thus distributing the strain on the covering 20. The fabric of the latter consists of yarn or strands as of silk of sufiicient strength so that if one point is inserted into one wall of the weave, a substantial pull can be exerted on the elastic I5 without tearing or ripping the fabric The covering is so tight around the rubber filament 2| as to constantly closely hug the same.

When the elastic I5 is compressed it elongates, and hence a portion thereof generally projects from the tubular section l6 toward the point l1. Such projection being uncompressed, forms a substantial obstruction in passing the tab ll through a fabric. When the point I! is inserted in piercing a fabric, the tab stops and markedly increased pressure must be exerted to force the tab through This frequently causes an enlarged hole or rip in the fabric such as l3. To overcome this, the elastic I5 is preferably first clamped at its front end and then rearward thereof to cause elongation of the elastic to proceedin a direc- Hence the serrations may be of progressively increased size or arranged according to an angle as shown. Thus the serrations 22 may be substantially greater in length than those at 23. In clamping, these serrations especially at 22 are caused to inwardly curve as shown in Fig. 3 to thus clamp the forward end of the elastic l5 before the rear end is clamped to prevent the elastic l5 from elongating toward the point I! and projecting beyond the tubular part l6 of the tab.

The tab may be further understood according to Fig. 4 which shows a plane blank 24 having point I'Ia, body section l6a, extension Mia and serrations 19a corresponding respectively to the l6, l8 and I9. This blank may be bent into channel form as suggested inFig. 8 and the elastic laid therein for the clamping assembling operation. I

Preferably the tab maybe modified as shown the like tabs [4 that unduly close to the tab point, causing an obstructing projection of elastic outside of the tubular holding section of the tab. With the present invention, the operator lays the elastic l5 into the channeled blank 25a, with its free end against the positioning stop 26-. Then the blank is clamped on the elastic in the usual manner. Thus greater speed and reliability in production is obtained. It will be understood that the stop 26 may be formed in any suitable part of the tab.

Since the stop 26 is of flexible material it may bend to suit when the tab is clamped on the elastic. Because the stop is positioned away from the tab point, the strength of the latter is preserved especially as it is of somewhat tubular form, and hence the tab point cannot be broken. Moreover, the stop prevents the tab body from being pinched fiat, and aids it to preserve its cylindrical shape.

The best results are attained by combining the positioning stop 26 with the variable height serrations 22, 23 of Fig. 2. The reason is that in the manual quantity production of a small relatively cheap object such as a tab, accuracy in a high degree is difficult to attain. Hence the serrations alone or the stop alone may sometimes be insufficient to attain the intended results. For instance, the elastic 15 may creep outward immediately back of the stop 26, a result that may be avoided by combining the said serrations with the positioning stop. Preferably the latter is placed outside of and just forward of the tubular section of the tab.

For use on delicate fabrics such as l3, serration points may sometimes catch on the fabric, especially if insufficiently closed. Hence a tab 21 may be provided according to Fig. 9 wherein the tubular section may have one straight edge portion 21 along the split thereof, adapted to overlie the points of the serrations including 22, 23 at the other side of the split to clamp down thereon and afford a smooth surface thereover to aid in inserting the tab into a delicate fabric Without catching and ripping the same.

It will be understood that the various tabs disclosed are all alike and made in a like manner except as may be otherwise stated herein.

It will now be seen that a device has been provided which fulfills the objects of the invention and is well adapted for practical use.

I claim:

1. A device including a one piece sheet metal tab adapted to be clamped on an end of an elastic fabric covered strand, including a tubular body, a single wall projecting point portion at one end of said body integral therewith, said tubular body being longitudinally split to provide confronting edges, at least one side of said tab being tapered at said split so as to provide a tab body of maximum peripheral extent adjacent to the point portion, whereby the tapered edge portion is bent into the said strand in advance of the other edge portions to avoid elongation of the elastic strand toward the point portion.

2. A device including a one piece sheet metal tab adapted to be clamped on an end of an elastic fabric covered strand, including a tubular body, a single wall projecting point portion at one end of the tubular body integral therewith, said tubular body being longitudinally split to provide confronting edges, at least one side of said tab being tapered at said split so as to provide a tab body of maximum peripheral extent adjacent to the point portion, said body having a struck out tongue spaced from the sides thereof and projecting toward the longitudinal split to position the strand in the body and limit movement thereof toward the point portion.

3. A device including a one piece sheet metal tab adapted to be clamped on an end of an elastic fabric covered strand, including a tubular body,

a single wall projecting point portion at one end of the tubular body integral therewith, said tubular body being longitudinally split to provide confronting edges adapted to clamp the elastic strand, and said tubular body having an inwardly struck tongue spaced from the sides thereof and from the point and projecting toward the longitudinal split to position the elastic strand and prevent elongation thereof toward the point portion upon being clamped in the body portion.

HYMAN SKORA.

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