US2187237A - Blind stitching device - Google Patents

Description

Jan. 16, 1940. J. JORDAN 2,137,237

' BL'IND s'rrrcruue DEVICE Filed Nov. 25, 1938 2 Sheets-Sheet 1 E JZEQl IN VEN TOR. JoH/v Jo RDA/V ATTORNEY Jan. 16, 1940. J. JORDAN 2,187,237

BLIND STITCHING DEVICE Filed Nov. 25, 1938 2 Sheets-Sheet 2 INVENTOR. 6; Jo HN JORDAN :51 .132 BY M ATTORNEY H a Patented an. i 914 n i v 'Ifihisinvention tetra blindstitching'device, in a some respects similar ytof that disclosed and pat ented to me in my Patent Nuniber 2,091,479.

the disclosure to .follow and -which is] particularly to be ascertained by theclaims 1- e l This disclosure isrvhereinafter described in detail for the purpose of clearly explaining the preferred embodimentselected ior the purpose. It is to be understoodwthatithe illustration herein :isbyway of example only, and. not of limitation, j that itmay beie ipliecl all nwithin the scope :written.

other embodiments or the claims as ;hereinafter I accomplish the'lnbjttsinamd and "atlas n that will beaatonce apparent to those skilled in ailoring and related artstbythe structure shown clamps as hereinafter described; U

- in the; accompanying :drawings, in, which a Fig. I isca plan liew of thedevice open with a piece of fabric in place readyfoi closure ofthe "Fig. 11 isa viewfioffithersame structiire asfin has fat.

\F'ig. II. t i e v e In the drawings, [is a frame, ofiset at la for convenienceinhandling. i 1 t i The frame I supportsone relatively fixed jaw 2 and a movable jaw 3, -,the latterbeing pivotally attached to a slidable plate 4 ,bythe pivot 5 to n Fig. I with thelclamptcloseds' andreadyfor sew- A ing iamodifled presser foot of the sewingimachine being indicated; 1 n

Fig. III is weathering. ii on the line Fig. IV is a sectionjof of equalize its engagement with the jaw 2 or with fclothheld between, the jaws, representedby 6.

shown, the reverse or wrong sideof the piece of cloth isyshowntandlthe purpose of the setup in Fig. II is to sew aninlay I of-identical materialintothe cloth tin such manner that the juncture or seam will be normally invisible and indeed difficult to find when one 'knows where to "look, from the other or fright? side of the cloth. Asin the invention of the patent referred to, I

fold thecloth around oneof the jaws, preferably the fixedjaw 2 insuchmannerthat abight of the clothncontainingthe edgesto be sewn together is about midway on the race oithe jaw 2, with one part of the clothi olded back substane r Fig. IV. The "jaw wit is ian' obgiectroffthe presentinventionto devise 2a device for 'blind stitching that increases the 1 utility; Of "that disclosed sin the patent mentioned, to-Imakethehparallel grooving of {the jaw emem- I bers, which "whenjoined fomi needle-ways, un necessary and} to o 'tl'ierwise :jihtirealsethe rgeneral utiiity of the device, which will be apparent from The: jawlii as mentioned now to bedescribed, what has regarded as introductory, H l

With ,the device of the patent, I used two hard Jfaced jaws with parallel needle grooves across fBLfINDs'rITcmNe DEVICE f e tRdJohn'Joi-dan, Portland, Oreg. e en ntii fidveinber2a 1938, Serial Mea an? n team (Cl. 11 1 7 y a a y Y I tially" at tright angles on top or the jaw and the other underneath the same jaw, all as shown in 3 is thenybrought firmly into engagement with the. cloth 6 *asjbacked bythe jaw 2,.andlocked imposition. M n Y 1 r I is attached to and movable with thefslidableplate 4 which provided with "parallel slots 8 and e within which are easily fitting :p'in's NJ andull; the pins being made rigid with the frame structure underneath the slots-as shownin FigrII; i i

A toggle lever I2 is attached to the slidable plate 4 by the pivot pin 43 and to a bell-crank leverl5 by they-pivot pin I 6. i g Thebell-crank lever I5 is' pivoted at iBwto an geccentric disc 19, ad:

justable at fiil to accommodate clothof difierent thicknesses between the jaws Zand 3. 1

1 It is thought'tha't many ot er devicesfor holding the jaws together in locked position areusab le and it is admitted thatthat shownissubstantial 1y oielg hence needsno furtherudescription.

The essential difference; between the devic e herein disclosed and the one patented is in parts gonebefore being their faces; requiring that sewing machine feed" or stitch length bathe same asgroove spacing in y allucases.

is w s q iite i y a e nlis d did not permit changing the length of the stitch to an extent deemed desirable since either the stitch had to be the same as the groove spacing, twice that or three times, no intermediate stitch length being practicable.

I now use one hard faced jaw, in this case the jaw 3, and roughen the face to sharp ridges by lengthwisemilling as shown at 3a, though'othee forms of roughening are not excluded.

The other jaw, in this case 2 is provided'with a iaceof resilient rubbergof about the resiliency of high grade tire treadjstock, indicated by the numeral 2a, which may be attached in any suitable manner though I prefer to make the parts tongue and groove with the tongue on the rubber as shown in Fig. IV and fasten the rubber to the grooved metal backinglpart of the jawby shellac or other suitable cement.

As with the device of the patent, the place where the needle 25 starts to penetrate the cloth 6 iscritical, necessarily being in the line represented by the bight of vertical cloth between the jawsas shown at 6b in Fig. IV.

Whenthe clamps are set on the cloth tend the linebetween the jaws" is a right line with reitself, enteringon one side of of the old type.

spect to the forward feed of the sewing machine, the needle point always penetrates the cloth the point of joinder and coming out again about the same distance on the other side of what will be the seam. on the same side of the cloth, the wrong side, as it entered. The resilient rubber yields enough to permit the needle to pass through without breaking the sewing thread and it appears that there is a much better draw, that is the edges of the respectivepieces of cloth are drawn together better than withthe grooved device of the patent.

Since accurateguiding is even more critical with this device than before, I provide a milled groove 21 in the hard faced jaw 3 that is parallel withthe face of the jaw. I further provide a uide 28 is attached to the modified presser foot 30..

It will be expedient to temporarily join the two pieces of cloth to be sewn'together by'basting, by tailors adhesive tape or other preferred means. The seam may be made with tape reinforcement if desired for sleazy orloosely woven materials'though with firm} stock its strength compares favorably with a single lapped seam along seam as for an inlay as shown.

The word rubber as used herein is intended to embrace all materials having the well known resilient characteristics of rubber compounds and is not necessarily limited to those materials composed in part of material from the rubber tree.

Having disclosed my invention so that its principle has become known and shown a preferred way of applying that principle, what I claim as new and desire to secure by Letters Patent, is'- 1. In a .device for sewing a bight of cloth containing two edges'to be sewn together by blind seaming, a pair of fabric holding means for holding abutting"- edges of a fabric in a bight for presentation to a sewing needle, one of said pair of holding means being of hard material roughened to grip the fabric and the other of said pair of holding means being of resilient rubber, and means for guiding the pair of holding means to present the bight of cloth to the needle where it is held between the respective holding means.

2. A'blind seam attachment for a sewing machine comprisi a frame, a pair of clamping that bears in the guide groove 21 and It mayibe used equally well for face'on the other jaw.

3. A blind seam attachment for a sewing machine comprising a frame, a pair of clamping jaws on abutting edges of cloth to a sewing needle for entrance and egress on the same side of the cloth and means for guiding the jaw faces in lines parallel with the line of progress of the needle, characterized by the face of one jaw being of hard material to engage the held cloth and the face of the other jaw being of resilient rubber.

4. A sewing clamp for blind seaming, comprising a pair of opposed cloth holding means that are adapted to holda bight of cloth therebetween for penetration by a sewing needle into and out of thecloth on the same side thereof,

said holding means having a hard, cloth holding face on one element of said pair and .a' resilient rubber, cloth lholding means on other element ofthe pair, the hard face and the rubber face being arranged to engageopposite sides of the cloth at thepoint where the needle is to penetrate. v

5. In a blind stitching device, a, pair of cloth holding means that-are adapted to firmly hold a bight of cloth therebetween to present the bight for penetration of a sewing needle, in and out of the cloth on the same side thereof, means'for holding the cloth' firmlyin proper relationship to a sewing needle holding means, characterized by at least one of said faces being of soft resilient rubber.

' 6. "In a blind seaming device, a pair of clamping jaws, means for lockingabutting edges of cloth between the jaws andmeans for guiding the jaws to present the cloth clamped between the jaws to a, sewing needle, the said jaws beingcharacterizedby a rigid cloth engaging face on onef'jaw and a soft resilient cloth engaging the face of the JOHN JORDAN.

the frame that are adapted to present and holding faces on said,

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