US1823505A - Ribbon shirring device for sewing machines - Google Patents

Description

Sept. 15, 1931. T. oN ElLL 1,823,505

RIBBON SHIRRING DEVICE FOR SEWING MACHINES Filed July 15, 1929 2 Sheets-Sheet l gwumto'o 19 Sept. T QNElLL RIBBON SHIRRING DEVICE FOR SEWING MACHINES Filed July 15, 1929 2 Sheets-Sheet 2 Pat ented Sept. 15, 1931 Yemen STATES PATENT OFFICE ri i'oivms ONEILL, or BROOKLYN, NEW YORK, AssreNoB TO THE sINeE MANUEAc'rUB- I ING, CGMPANY, F ELIZABETH, NEW JERSEY, A CORPORATION OF NEW JERSEY RIBBON snIBBINe nEvIcE EoB sEwINe MACHINES iApplication filed J'u1y 15, 1929. Serial NO. 378,196.

This invention-relates to improvements in shirring attachments for sewing machines and more particularly to attachments for shirring ribbons and similar fabric strips.

' The present invention liasfor its primary 1 objects to proyide for effecting a uniform quality of shirring' regardless of slight variations inthe thickness ofthe work; topro- 'bvide for readily determining different degrees of shirringof the strip; topermit of stitching theshirred strip during the shirring operation 'to a' sleazy material without puckering said material; and still further to. provide forreadily shirring strips of diff terent ,widths'in' the production of shirring effects of different characters. I

f Inlthe shirring of fabric strips such as ribe f bons,-.dur1ngthe operation ofstitching a r1bbon to'an unshirred body material, a prior 5 practicehasbeento feed the strip to be Shirred 7 faster than the unshirred material by either ,retarding the passage-ofthe latter, as by meansof atension; plate, or by wholly or in part removing: the ,unshirred material I from the direct action. of the work-advancing tion of successive stitches. I

In a preferred'embodiment of the'present invention, the strip to be shirred is directed tothe stitch-formingmechanismby a ribbon-guide spaced above 'thebody material placed uponthe usual cloth-plate ofa twoneedle sewing machine. Fromsubstantially the point ofipenetration of the work by the needles, the strip to be shirred is directed at a downwardinclination toward the body material, whereby the length of the strip between successive stitches is necessarily greater than the stitch-length as represented bythe advance, for each stitch of a body material effected by the actionof a,four-'motionfeeddog assisted, preferably,by lateral movements 7 of the needles whilelin the work. "That the shirring effect uponthe fabric strip is uniform willbe'readily understood-by considering the "downwardly inclined pathof the strip as a cbnstant comprising the hypothenuse ofa right triangle of which a shorter side is the body material from the point of convergence of said strip therewith to the vertical line of one of the descending needles.

In the present embodiment of this improvement, the ribbon-guide is shaped to bow the strip or ribbon upwardly substantially centrally of its width and is detachably carried by the sewing machine presser-foot so as to be readily exchangeable with others of different contours and Widths. The extent of shirring of. the strip is adjustably determined by changing the spacing of the strip from the body material at the needle penetration point, but might obviously be obtained in other ways as, for instance, by changing the angle of inclination at the delivery end of the guide. The presser-foot is constructed to provide spaced tread portions opposed to the feed- 'ing machine bracket-arm and of a portion of the cloth-plate, with the present improved I presser-foot and ribbon guide in front elevation. Fig. 2 is a top plan view of the presserfoot and a portion of the cloth-plate. Fig. 3

is a view in side elevation ofthe present improved presser-foot, the needle and thefeeddog, with a portion of thecloth-plate in section. Fig. 4 is a sectional view substantially on the line Jr-4 of Fig. 2. Fi 5 comprises perspective views of the individual parts of the presser-foot, including the ribbon-guide.

Fig. 6 is a perspective view of the feed-dog. Fig. 7 is a view of the delivery'end of the strip-guide. 'Referrin to the/drawings, the present improved shirring device has been embodied'in a commercially well known sewing machine having a work-support comprising: a clothplate 1 provided with slide-plates 2 and .3 upon Opposite sides of a throat-plate 4. Over- 7 hanging the cloth-plate is a tubular bracketarm 5 terminating in a head 6, pivot ll porting a swinging frame 7. Journaled for endwise rec1prOcat1on in suitable bearings 1n the frame 7 1s a needle-bar 8, carrying at its f produced upon the ribbon.

port and thereby vary the shirring efl'ect By employing the compound feedcomprising the four-motion feed-dog and the feeding needles, the work-advance of both plies is definite for each stitch, in correspondjusting means;

clined surface in the direction of feed ence with the selected length of feed obtainable by means of the usual stitch-length adguiding means including a fabric-strip guide 'and a bevelled fabric-stripsupporting surface inclined downwardlytoward said worksupport from substantiallythepoint of penetration of said strip by the needle, and

means permitting adjustment of said. in-

relatively to said guide.

2. In a sewing 1nachine,'a work-support,

. Work-feeding means, a plurality of reciproca- I tory needles spaced crosswise of and having laterallyvibrating movements in the line of feed, a presser-foot opposed to said workfeeding means rearward of the path of said needles, and a guide terminating in advance of said presser-foot for supporting a, fabric strip in spaced relation to the work-support atthe point of penetration of said strip by the needles, the rearward end of said guide 7 having a strip-supporting surface inclined to said work-support between successlve points of penetration of the work by said needles.

3. In a sewing machine, a horizontally disposed work-support, a vertically reciprocatory needle, work-feeding means, a presserfoot having a tread-block in'advance of the V needle, a guide sustained'by the pre'sser-foot relation to the work-support at the needle I penetration point, an auxiliary presser-foot bearing upon the stitched work on the seam line thereof, and means for adjustably securing the auxiliary presser-foot upon the main presser-foot to thereby adjustably determine 7 the extent of Spacing of a d g de from the -work support; p e

5.; In a sewing machine, a work-support, a feed-dog projected above said work-support toadvance the work, a plurality of vertically reciprocatory needles spaced transversely of,

-, he di ectionof feed, a presser-foot having a tread-block in advance, ofthe needles ter- ,foot, saidpresser-foot having spaced tread portions disposed rearwardly of and subtread-block andv auxiliary 1 minating in a downwardly beveled portion provided with needle-slots, a fabric-strip edge guide detachably secured upon said treadblock to deliver a fabric strip to the needles in spaced relationto said work-support, and an auxiliary presser-foot rearward of the needles; 1

6; In a sewing machine, awork-support, a feed-dog projected above said work-support to advancethe-work, a plurality of vertically reciprocatory needles spaced transversely of the direction of feed having lateral workfeeding movements, a presser-foot having a tread-block'in advance of the needles terminating in a downwardly beveled portion provided with needle-slots, a guide disposed upon said tread-block to deliveria' fabric strip to the needles in spaced relation to said worksupport,and an auxiliary presser-foot rearward of theneedles. v v

7. A sewing machine presser-foot comprising a shank provided with a forwardly extending supporting arm, a tread-block'securedupon said armv for adjustmentlengthwise thereof having a downwardly inclined rearend provided with parallel needle-slots spaced lengthwise of said inclined end, and a'gu'ide disposed to direct the edges of a fabric strip over the inclinedend, of the presserstantially in alinement with'said needle-slots. .8; A sewlng machine presser-foot comprising 'a'vertically directed shankrprovided with horizontally disposed supporting arms, a tread-block carried by said arms having spaced needle-slots in its rear end, a stripguide,"means for detachably securing said strip-guide in position to overlie the treadblock, an auxiliary resser-foothav-ing spaced tread portions disposed rearwardly of and substantially in alinement with said needleslots, and means for securing said'auxiliary presser-foot upon the presser-footshankfor vertical adjustment.

9. A sewing machine presser-foot comprising a vertically directed shankhaving forwardly extending spaced supporting-arms, a tread-block sustained by said arms for adjustment lengthwise -tl161'80f and provided at its rearward end with spaced needle-slots, a strip-guide bowed upwardly substantially centrally of its length, and clamp-plates carried by said arms for detachably securing the strip-guide in position to overlie said tread-block.

v10. A sewing machine presser-foot comprising a vertically directed shank provided with forwardly extending spaced supporting arms, a tread-block sustained by said arms terminating in a downwardly beveled rear end provided with spaced needle-slots, a strip-guide, means for detachably securing said strip-guide in position to overlie the tread-block, and means for directing the 'l3o margins of a strip inassed' through said'guide downwardly over the beveled rear'end ofthe tread-block. 1 V. 11; In a sewing machine, awork supports E a reciprocatory needle,v workefeeding means, means for; supporting alfabric to he Shirred in spaced relation to said Work-supportat the needlepenetration'point-,,means for'fdirectingsaid fabric doWntV-ardly toward? the 1 "work support 1 from the needle-"penetration point, whereby thelength of the fabric-be? tween successive" needle penetrations is r greater than the stitch-length, and .lneans for udjustably determining the height above the V worksupport of the fabric at the needle-11pmetration point. 7 v ,1 l

12. In asewing machine, a work-support, o a 'reeiprocatory needle, work feeding means means for :g uiding a fabrivstrip in "a direc- 3 tion inclined to t-he Work-siipportjin the line of seam formation between:successive-points of penetration offthe fabric-strip by the needle; vherebytheilengthiofjthefabricl v e V V V strip between successive needle penetrai I 28 tions therein is :greater than the stitched j t" length-and means for relatively shifting the needle andstrip-guidingmeans iz'n the .liIlQ'iOf seam form'ation' during-f a stitchforming cycle toefi'ect the sec-tiring of the 3 fabric-strip tollthe b'odyinaterial in con-v tacting "relationship therewith along the sea nline, I v V v or V. V InI-asevving machine,a'workesupport; t .a' re'ciprocatoryz:needle;feeding-means for 7 2 3B advancing a body mater'ialin a direction substantially parallel with thewworksupport,

stiiip guiding means including-spaced substantially parallel guide-walls providing a -fabric-strip'passageway inelined tovthewo'rklsup port'in thelinefof seani formation heytween successive pointsjof penetration 0E 1 the fabric-strip by the needle, whereby the length of the fabric-strip between successive l needle-penetrations L thereof is greater than the stitch length, and asstfip gnide for'd'i Lectingthe' longitudinal edges of a fabric-V strip to said guiding'means. j

,In testimony Whereof,-' IhaVe signed my I name tov this specification.

y l .rTHOMAS'UNEILL;

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