US2441099A - Overedge sewing machine - Google Patents

Description

May 4, 1948. N. KNAUS OVEREDGE SEWING MACHINE Filed Sept. 10, 1946 '4 Sheets-Sheet 1 INVENTOR. JV'z'choZaus Wage/ms ATTORNEY May 4, 1948. N, KNAUS 2 ,441,099

OVEREDGE SEWING MACHINE Filed Sept. 10, 1946 4 Sheets-Sheet 2 IN V EN TOR.

dVichoZa/us 76mm; I

y QM ATTORNEY WITNESS May 4, 1948. N. KNAUS 4 2,441,099

OVEREDGE SEWING MACHINE Filed Sept. 10) 1946 4 Sheets-Sheet 3 IN VEN TOR. c/Vz'c/z olaus m mus B Y WITNESS ATTORNEY v Patented May 4, 1948 zuuirrzao :s'mrss PATENT :oFFicE DWERED GE "SEWING MACHINE Ni'cholaus-Knaus,iGranfo1-d, N. J., assignor toiThe BSinger Manuf acturing Company, Elizabeth, Nil, a corporafiuno'fiNew Jersey hpplicationsepteni'ber 10, 1946;SeiiztlNofi6951985 disclaims. 1

This invention relates to overedgeseviing machines'and more partictilarly'-to means 'emb'odie'd therein for hem-folding the marginal portions of 'both flat and tubular workpiecesand iorso presenting the folded workpieces to the trimming and stitch-forming mechanisms that the projecting edge portion "or each workpiece *is trimmed ofi substantially in 'line with the fold and the hem is secured to '-the body material by a blind-stitch overed-ge seam.

-A primary objectof the inverition' is to 'pr'ovid'e an improved -mounting for the hem-folder whereby the "machine "will "be devoid of certain obstructions which, in prior=ma'cl'ii1'i'es,have interfered with the'free-passage-of the work -and have caused snarling *d'f the trimmed dfi porticn of the work and, when hemming tubular work, of the thread-chainwlii'ch is connected to the work at the be'ginning end of theseam.

Another object of the invention is ftoipfovide an improved hem-folder which may befuse'd' for foldingeither tubularor flat work.

Another object-is to-provide, "a throw-out hemfolder having readily releasable-Hatch "means for holding the hem-folder in its operative position.

-Still another object is to provide an improved mounting for 'a hem folder' which 'afiords means for adjusting the hem-folder relative to the stitching pointin a plurality f transverse directions.

With the above and 'otherobjects in view,-'-as will hereinafter appear, the invention comprises the devices, combinations and "arrangements of parts hereinafter set forthandillustrated in the accompanying drawings of "apreferred embodimentof the invention, from'which the several features 'of the invention and the "advantages attained thereby will -be readily "understood by those skilled in the 'art.

-In the drawings "Fig. "1 is a frontelevationgpartly-in section, of'a'portion of an overedgesewingmachineshowing it fitted with "one former improved hemfolder adapted for hem-"folding both fiat and tubular work-pieces.

Fig. '2 is a plan view'o'f that "portion of "th machine illustrated in Fig. 1.

Fig. Sis a left-end view there'o'i'.

Fig. 4 is a transverse vertical section "taken substantially on the line 4-4 of Fig.

FigJS is a detail horizontal section taken substantially on the line ii- 5 of "Fig.

Fig. -'6 'is adetail horizontal section taken on thedinefi-G of Fig. 1.

Fig. is a detail vertical sectional "view-taken on *theline "'l1"o-f Fig. 4.

Fig. *8 is a detail horizontal section takenon the line 8- 8 of Fig. 1.

Fig. 9 is a detail vertical section'takenpnthe line 9*9"o'f Fig. "2.

(Chill-162') Fig. 10 is a disassembled perspective view of an edge-guide hereinafter to be described.

"Fi'g. 1 1 is a *di's'assembledperspective view of the sup'por-ting means for the hem-lioldershjown in'Fig. "1.

Fig. 12 I is a perspective-vi'ewiof za' mo'difiedliform of hammer particularly adapted Ifor :hem-iolding fiat, or=so-ca11ed open end, workpieces.

Fig. 13 1s a perspective viewzo'f a second modified iorm of hemm'er particularly adapted for hem-folding tubular workpieces.

Refer-ring :more specifically it'ofith'e :drawings, the invention is shown as :tembodie'd :in an overedge sewing machine (of the "type :disclosed in United States :patent :cflN. :Knaus, LNo. 2338,796, Apr. 15, 21941.

line lmachineflias a imain .frame F Jc'omprising a base portion l and an upstanding portion 2. I he -base portion carries a horizontally disposed work-supporting plate 3 and a throat-plate "4 provided with slots through which operates :serrated reed-dogs forming a part of work feeding mechanism hereinafter referred to. The -main frame also supports overedge stitch-forming mechanism comprising a reciprocating curved needle tipan under or nee'clle-loop-taking threadcarryinglooper li and-anoveredgelooper or 'loopspreader 1 whioh oooperates with the "needle '5 and looper 6 in the formation of 'overedge stitches. I he machine also includes a conventional work-feeding mechanism designated "generally as anda cooperating presser-device for advancing the work to and beyond the stitchiorming mechanism. The presser-device comprises a horizontally -'disposed spring-depressed presser bar-fl pivoted, at its-reanend, to the machine frame andcarrying, at its iorwar'd end, a presser-foo't 9 which overlies the serrated feeddogs which form a part of the workfeeding mechanism. The machine further includes a trimming "mechanism adapted to trim the work atone side of the lineof seam formation. The trimming mechanism includes a vibratory 'trimmer-bar l0 actuated from the main -sha'ft'of the a machine and carrying at its forward endamovable 'trimmer blade H which cooperates with a stationary trimmer blade P2 carried by'the base portion 1 'ofthe-machine frame. Inasmuch as the specific constructions of 'the'stitchiormirig, 60 Work-feeding and "work-trimming mechanisms are shown in the "above mentioned .patent and form no part of the .present invention, ."further illustration 'and "description thereof is deemed unnecessary.

As hereinbefore indicated, -this invention Lrelates "primarily to improved .mefans, "embodied in a machine '01? :the type above described, for .so presenting theworkto' the stitch=forming mechanismthat the marginal .portion of the work is 60 "folded into flattened is-shape, with Ithe :upperovercdge seam which covers the trimmed edge and secures the hem to the body of fabric by so -called blind stitching."

entering and l3 and the guide block G carried thereby are adjustable bodily lengthwise of the support and transversely of the line of scam formation by an adjusting screw I1. The guide block G is formed .with a vertically disposed edge-guiding face I8 which engages and guides that portion of the f blade of the hem-folder.

carried by and projecting downwardly from the block G, enter, respectively, apertures w and 20 When hemming tubular work th stitching may.

commence at any point and proceed around the work until the point of beginning has again reached the stitching point. In positioning tubular work in the machine, preparatory to the beginning of the hemming operation, it is customary to raise the presser-foot and to move thework back and forth by hand, in the line of seam formation, through the hem-folder and beneath the presser-foot until the work is properly folded and properly positioned relative to the trimming and stitch-forming mechanisms; after which the presser-foot is lowered and the sewing begun. For this purpose it is desirable that the hemfolder be maintained in its working position.

In preparing to hem fiat work, in which the hemming starts at one edge of the work andrprogresses thereacross to the opposite edge thereof, it is customary to swing the hem-folder upwardly and out of working position; then to hem-fold the marginal portion of the work manually and insert it between the presser-foot and the underlying cloth-plate and feed-dog, and thereafter to swing the hem-folder downwardly into operative position with the blade of the hem-folder inserted between the lowertwo plies of the folded hem. I When hemming either tubular or flatwork, it is desirable that the hem-folder be permitted to have a slight rising and falling movement in its operative position. This movement permits the folder to adapt itself to variations in the thickness of the work such, for example, as when a cross-seam is passing through the folder, and it also permits the folder to rise and fall with the work under the action of the feed-dog.

The hem -folder disclosed in Figs. 1 to 4 inclusive and 6, 7 and 9 is adapted for hem-folding both flat and tubular work. In other words it is adapted to be swung upwardly and out of working position to facilitate the introduction of flat work and it is also adapted to be locked in its working position which is desirable when introducingand hemming tubular work.

The hem-folder disclosed in Fig. 12, which is adapted primarily for hem-folding flat workpieces, diifers from that shown in Figs. 1 to 4, 6, 7 and 9 in that it has no means for locking it in its working position,

v The form illustrated in Fig. 13 is specifically designed for hem-folding tubular workpieces and, aside from a slight rising and falling movement under variation in the thickness of the work and the action of the feed-dog, as above described, is permanently maintained in its working position.

All of the three forms of hem-folders are adapted to be removably secured upon a common supporting bracket adjustably mounted in the upstanding portion 2 of the machine frame'as here inafter will be described.

Cooperating with each of the three forms of hem-folders is an edge guide comprising a horizontally disposed block G mounted for horizontal floating movements on a saddle l3 adjustably secured upon support 14 fixed, by a screw l5, to the pedestal portion [6 of the base I. The saddle workpiece which is folded about the work-foldin Pins I9, 20 and 2|,

and ,2! inthe saddle [3 thus permitting the block to be moved bodily on the saddle transversely":ofithe guiding face l8 and consequently transversely of the line of seam formation. A coil spring 22, seated in a cavity 23 aligned with the aperture 20, has its outer end in en agement with the pin 20 andnormally shifts the pin and theguide-block G toward the work-folding blade until the pin [9 engages the wall 19* of the aperture 19 and the pin 2| engages a wall 24 forming a part of a fixed edge-guiding block 25 secured to the saddle 13 by a screw 26. In addition to its bodily movements transversely of the line of scam formation, the guide block G is adapted to have pivotal movements about the pins l9 and 2|. Thus the guide-block is mounted to have pivotal and bodily floating movements in a horizontal plane to facilitate the passage and guidance of a workpiece having an irregular folded edge, such, for example, as one having a cross-seam. A floating edge guide of this general nature is disclosed, in more detail, in the pending United States patent application of N. Knaus and P. Anton, Serial No. 626,936, filed Nov. 6, 1945.

It is to be noted that theedge guide G and the mount therefor are supported by the base I below the level of the work, while the hem-folders, which cooperate with the edge-guide, are supported above the level of the work, thereby providing an unobstructed passageway therebetween for the passage of the work. This specific mounting of the parts is an important feature of the present invention.

Each of the three hem-folders disclosed in the drawings is adapted to beattache'd, selectively. to a vertically disposed bracket 21 secured, at its upper end, by screw 28 to a two-part slide block 29, mounted for horizontal adjustment transversely of the'line of seam formation in the head 30* of a stud 30 adjustably mounted in a bore 3! in the upstanding portion '2 of the frame F. Thus the stud 30, the block 29, bracket 21 and the parts carried thereby may be adjusted parallel to the line of scam formation and held in their various positions of adjustment by means of a set screw 32 threaded into the portion 2 of the frame and bearing upon a flattened surface on the stud 30. The block 29 and the bracket 21 carried thereby may be adjusted on the head 30 transversely of the line of seam formation, by an adjusting screw 33 threaded into the head 30 and having a collar 34 engaging in a not-ch 2i! in the slideblock 29 (Fig. 8).

As hereinbefore stated, any one of a plurality of hem-folders may be mounted upon the supporting bracket 21. T thatend, the bracket is formed with a U-shaped lower end comprising upright arms 21 and 21 and a connecting lower wall 21. The arms 21 and 21 are provided with aligned apertures 35 and 36 which are designed to receive a removable and replaceable pivot pin 31 upon which a carrier for the hem-folding blade of each hem-folder is adapted tobemounted.

Referring first to the hem-folder adapted speerratum hem-folding blade38-is shown as having itsshank 39 secured, by a screw 40 upon the upper endoia block or carrier 4| pivotally mounted on the pivot pin 31-. As hereinbefore stated the hem-folder for tubular work is preferably maintained in its working positionbut is adapted to have a slight 2*! of the bracket 21. The pin 42' is somewhat less'in diameter than the width ofthe slot and therefore is free to be moved sidewise therein thus permitting but limiting the turning move-- ment of the block 4| and the hem-folding blade carried thereby.

The construction disclosed in Fig. 1-2 is designed particularly for hem-folding flat work, in the introduction of which it is desirable to swing the hem-folder upwardly and out of its operative position until the beginning end of the work has been placed beneath the presser-foot and" the initialhem-fold has been made manually. Inthis form a hem-folding blade 44 has its shank 45 secured by bolt 46. to a hinge block 41 pivoted, at 48, to an extension 49 of a; carrier block 49 pivotally mounted, on the pivot pin 31, in. the arms 21 and 21 of the bracket 21'. A stop-plate 59, adjustably secured upon the. upper end of the block 49 by a screw i passing through a slot 59 in the plate, has down-turned fingers 52 which engage the straight rear wall 41- of the hinge block 41 and limit the downward movement of the block 41 and the hem-folder carried thereby. By adjusting the plate lengthwise. of the slot se the vertical position of the blade 44 maybe varied. The block 49 carries a pin 53 which is located within the slot 43 in the arm 21 of the bracket 21. This pin is-of greater diameter than the pin 42 and does not have any lateral movement in the slot 43; the pivotalmovement of the blade 44 being about the'aXls of the pivot 48.

Likewise the bracket 2'! is adapted to have secured thereto the universal hem-folder, shown in Figs. 1 to 4 inclusive and 6, 7 and 9. This folder is designed to handle either fiat workpieces or tubular workpieces with-equalfacility; being locked inoperative position when hem-folding tubular workpieces. and capable of being swung upwardly out of operative position for the insertion of flat workpieces.

To that end, the device. comprises a hem-folding blade 54 having a slotted shank 55 adapted to be secured upon a hinge member 55. by a clamp screw 51 (Fig. '7). Intermediate its ends, the member 56 is pivotally mounted, by a pin 58, on the extended portions 59 of a carrier block 59 adapted to be pivotally mounted, by the pin 31 hereinbefore mentioned, between the arms 21 and 21 of the bracket 21. The block 59carries a pin 60 having a projecting end which'is located in the slot tically disposed finger-actuated lever 6| the shank of which is located in a slot 52 in the block 59. The lever is pivotally mounted, at its lower end, upon a bolt 63 extending through the'portions 59 of the block and through an apertureS-I of thelever. A nut 54 threaded'on. the bolt 63 hoidsthe bolt against?endwisa-dispiacement. liiitending transversely through the: latch lever '61 is a pin. 65 the projectingportions of which are adapted to enternotches 56 iormedii'n the hinge 1' member 55,- as shown infull lines in Fig. 1-, there-- by to lock the parts together. The lever BI is normally urged to turn in acounterclockwise direction as seen in Figs. 1 and- 7, by two coil springs 56 seated in sockets 61' formed in an inverted L-shaped capplate 58', secured to thebl'ock '59 by screw 69 The projecting ends of the springs 56 bear upon the pin'55; Thelatchlever 6| may be turned clockwise, in opposition to the springs 56 by means of pressure appliedmanually toa disk-like portion Gi -formed on the upper end" of the lever 61'. Thus the walls of the notches 56 in the member and the spring-pressed pin constitute a latch device for holding the hemfolder in its operative position, while the lever 6l-'-8l constitutes means for releasing the latch to permit the hem-folder to be swung: out of its operative position, as indicated in dotted lines in Fig. 1, to facilitate theintroduction offiat work. The lower walls of the notches 5t project beyond the upper walls thereof and constitute abutments which engage the under surface of the pin 65,

thereby limiting the counterclockwisemovement of the member 56 and the" hemefol'der carried thereby and aligning the notches, 56* with the pin.

Means also is provided for automaticallyswinging the hem-iolder'to' the inoperative position illustrated in dotted lines in Fig; 1 when the lever 5|" is shifted to release the member 56''. This means comprises a plunger, consistingoi" apin l0 slidingly mounted in a bore H in the block 591and a coil spring 12 bearingv upon one endofi the pin and urging its opposite end into pressure contact with the member 56 below" the pivot 58,. as shown in Fig. 7. The spring. 12 is. held in the bore H and maintained under pressure by the. downwardl extending, portion of the plate 68'. Thus when the hem folder is held in itsoperative positionv by the latch. 55 65, the hinge member 56 is maintained under springpressllre. Consequently, the instant the latch is. released thespring plunger 10 turns the member 5Bclockwise (Figs .1 and 7) sum'ciently to shiftthe notch. 5 6 out of. the path:

of the pin 65. If the latch is. released suddenly,. the force of the plunger is. released instantaneously and the. limited movement of the plunger tends to kick. the hem-folder upwardly into-its retracted position shown in dottedv lines inFigl. However, if the latch is released more gradually the action of the plunger may not besuflicient to shift the hem-folder to its. completely retracted. position. In that case,. the return movement of. the latch-releasing lever 64, under the influence of the springs 66 will cause" the pin to be brought. into pressure contact: withcam surfaces 56 on the member 55 with the result that the pressure of the pin or those surfaces-willcontinue the turning movement of the member 55 untilthe hem-folder is. fully retractedv Regardless: of whether the hem-folder is retractedzsolely by the plunger 10' or by the plunger! in-combinationwith the pressure: of' the pin 65- on the: cam surfaces. 5.6, thepressure ofv the pin 65 against the :flat surfaces 56 of. the member 56 will hold the hem-- folder in its retracted position until it is manually pressed downwardly into operativet position,

From the foregoing it will be-perceive'd thatt'he: hem=folders are. supported from the 'upperportion ofzthe machine-frame above-the-planesot therwork while the cooperating ,edge-. below that plane.

As illustrated in Fig. 1 a workpiece passes over the work-supporting plate 3 and has its marginal portion folded into flattened S-shape and passed to the trimming and stitch-forming mechanisms by the combined actions of the hem-folder and the edge-guide. That portion of the workpiec which extends to the right beyond the lower fold t is trimmed oh by the trimming mechanism as is also the thread-chain which is formed preparatory to the sewing of a tubular article.

The specific mounting of the edge-guide and the hem-folder affords an unobstructed passageway therebetween and thus there is nothing to obstruct the freepassage of the thread chain and trimmed off marginal portion. To facilitate gravitational discharge of the trimmed off parts of the workpiece, the upper surface of the guide block G is bevelled laterally as indicated at g and longitudinally as indicated at g. Cooperating with the bevels g and g, in removing the trimmings, is a downwardly and forwardly inclined sheet metal chute carried by the base of the machine. As shown in Fig. 4 the chute receives the trimmings a: and directs them away from the trimming and stitching mechanisms.

Having thus set forth the nature of the invention, what I claim herein is:

1. An overedge sewing machine combining a frame, a work-supporting plate carried by said frame, overedge stitch-forming mechanism, a work-trimming mechanism, a work-feeding mechanism for feeding a workpiece to the trimming and stitch-forming mechanisms, 2., hemfolder located in advance of said stitch-forming and work-feeding mechanisms, means for supporting said hem-folder from said frame above said work-supporting plate, and an edge-guide supported from said. frame below said. work-supporting plate and arranged in spaced relation to said hem-folder, said edge-guide cooperating with the hem-folder to present tosaid mechanisms a workpiece having a marginal portion thereof folded'in S-shape with the lower fold in the line of seam formation and with the projecting upper ply in the line of trimmer operation.

2. An overedge sewing machine combining a frame,"'a work-supporting plate carried by said frame, overedge stitch-forming mechanism including a reciprocating needle and a cooperating looper, a work-trimming mechanism, a workfeeding mechanism for feeding a workpiece to the trimming and stitch-forming mechanisms, a hemfolder,'-including a horizontally disposed substantially U-shaped work-folding member located in advance of said stitch-forming and work-feeding mechanisms, means including a vertically disposed supportingelement connected to the upper arm of said member and to the upper part of said frame for supporting said member from said frame above said work-supporting plate, and an edge-guide located below and in spaced relation to said upper arm and supported from said frame below said work-supporting plate, said edge-guide cooperating with said member to present to said mechanisms a workpiece having a marginal portion thereof folded in S-shape with the lower fold in th line of needle penetration and with the projecting upper ply in the line of trimmer operation. v

3. An overedge sewing machine combining a frame, a work-support carried b said frame, overedge stitch-forming mechanism, a work-feeding mechanism 'for feeding a workpiece to the de G is supported stitch-forming mechanism, a hem-folder located in advance of said stitch-forming and work-feeding mechanisms, means for supporting said hemiolder from said frame above said work-support and an edge-guide supported from said frame below said work-support, said hem-folder and its supporting means being located above said edgeguide and spaced therefrom, thereby affording an unobstructed passageway between the hem-folder and the edge-guide.

4. An overedge sewing machine combining a frame having a base portion and an upstanding portion, an overedge stitch-forming mechanism including a reciprocating needle and a cooperating looper, a work-feeding mechanism for feeding a workpiece to the stitch-forming mechanism, a hem-folder located in advance of said stitchforming and work-feeding mechanisms, means for supporting said hem-folder from the upstanding portion of said frame, and an edge-guide supported from the base portion of said frame, said edge-guide cooperating with the hem-folder to present to said mechanisms a workpiece having a marginal portion thereof folded in S-shape with the lower fold in the line of needle penetration, said hem-folder and said edge-guide being so arranged relative to each other as to afford therebetween an unobstructed passageway for free passage of a workpiece.

5. An overedge sewing machine combining a frame, a work-support carried by said frame, overedge stitch-forming mechanism including a reciprocating needle and a cooperating looper, a work-trimming mechanism, a work-feeding mechanism for feeding a workpiece to the trimming and stitch-forming mechanisms, a hemfolder located in advance of said stitch-forming and work-feeding mechanisms, means for supporting said hem-folder from said frame above said work-support, an edge-guide supported from said frame below said work-support, the rear end portion of said edge-guide being formed with a rearwardly and downwardly inclined upper surface, said edge-guide cooperating with the hem-' folder to present to said mechanisms a workpiece having a marginal portion thereof folded in S- shape with the lower fold in the line of needle penetration and with the projecting upper ply in the. line of trimmer operation and with the marginal portion thereof overlying the inclined surface of said edge-guide, and a downwardly and forwardly inclined chute located rearwardly of said edge-guide for deflecting the marginal portion of the work trimmed off by said worktrimming mechanism.

6. An overedge sewing machine combining a frame, a work-supporting plate carried by said frame, overedge stitch-forming mechanism, a work-trimming mechanism, a work-feeding mechanism for feeding workpiece to the trimming and stitch-forming mechanisms, a hemfolder located in advance of said stitch-forming and work-feeding mechanisms, means for supporting said hem-folder from said frame above said work-supporting plate, an edge-guide supported from said frame below said work-supporting plate, said edge-guide cooperating with the hem-folder to present to said mechanisms a workpiece having a marginal portion thereof folded in S-shape with the lower fold in the line of needle penetration and with the projecting upper ply in the line of trimmer operation, said hemfolder and its supporting means being located above, said edge-guide and spaced vertically therefrom to afford an unobstructed passageway therebetween, said edge-guide having transversely disposed downwardly inclined upper surfaces for permitting the arginal portion of :said projecting upper ply to be deflected out of a horizontal plane, and a downwardly inclined chute for receiving and deflecting the marginal portion of the work trimmed off by the work-trimming mechanism.

7. An overedge sewing machine combining a a frame having a base portion and an upstanding portion, overedge stitch-forming mechanism, a work-trimming mechanism, a work-feeding mechanism for feeding a workpiece to the trimming and stitch-forming mechanisms, a hemfolder located in advance of said stitch-forming;

and work-feeding mechanisms, means, including a stud fitted into the upstanding portion of said frame and a bracket supported by said stud and having the hem-folder connected thereto, for supporting the hem-folder from the upstanding portion of said frame, and an edge-guide supported upon the base portion of said frame, said edge-guide cooperating with the hem-folder to present to said mechanisms a workpiece having a marginal portion thereof folded in S-shape with trimming and stitch-forming mechanisms, a hem-' folder located in advance of said stitch-forming and work-feeding mechanisms, means, including a stud secured in the upstanding portion of the frame and a bracket supported on said stud and having the hem-folder connected thereto, for supporting said hem-folder from the upstanding portion of said frame, said stud being adjustable in the frame parallel to the line of feed and said .bracket being adjustable on said stud transversely of the line of feed, means for holding said stud and bracket in their adjusted positions, and an edge-guide supported from said frame below said work-supporting plate, said edge-guide cooperating with thehem-folder to present to said mechanisms a workpiece having amarginai portion thereof folded in S-shape with the lower fold in the line of needle penetration and with the projecting upper ply in the line of trimmer operation. 9. An overedge sewing machine combining a frame, a work-support carried by said frame, overedge stitch-forming mechanism, a worktrimming mechanism, awork-feeding mechanism for feeding a workpiece to the trimming and stitch-forming mechanism, a hem-folder located in advance of said stitch-forming and work-feeding mechanisms and supported by said frame wholly above the plane of said work-Support, and an edge-guide located at one side of said worksupport and supported by said frame below-said work-support, said edge-guide cooperating with the hem-folder to present to said mechanisms a workpiece having a marginal portion thereof folded in SPshape with the lower fold in the line of needle penetration and with the projecting upper ply in the line of trimmer operation.

10. An overedge sewing machine combinin a frame having a base portion and an upstanding portion, overedge stitch-forming mechanism, a work-trimming mechanism, a work-feeding mechanism for feeding a workpiece to the trim;-

.ming and stitch-forming mechanisms, a hemupstanding portion of said frame, a U-shaped bracket having one leg thereof connected with said stud, said carrier being pivotally mounted between the legs of said bracket, and an edgeguide supported by the base portion of said frame, said edge-guide cooperating with the hem-folder to present to said mechanisms a workpiece having a marginal portion thereof folded in S-shape with the lower fold in the line of needlepenetration and with the projecting upper ply in the lineof trimmer operation.

11. In an overedge sewing machine having a frame, a work-supporting plate, stitch-forming mechanism, work-feeding mechanism and a work-trimming mechanism; a hemming attachment for hem-folding a workpiece and directing it to said mechanisms, comprising .a hem-folder secured to said frame above the work-supporting plane of said plate and an edge-guide cooperating with said hem-folder secured to said frame below said plane and independently of the support for the hem-folder,

12. In an overedge sewing machine having a frame, a work-supporting plate, stitch-forming mechanism, work-feeding mechanism and a work-trimming mechanism; a hemming attachment for hem-folding a workpiece and .directing it to said mechanisms comprising a hem-folding blade, a carrier to which said blade is, secured, a supporting bracket on which said carrier is .pivotally mounted, a stud secured in said frame above said carrier, means securing said bracket to said stud, an edge-guide cooperating withsaid hem-folding blade, and means securing said edgeguide to said frame below said work-supporting plate. r

13. In an overedge sewing machine having a frame, a work-support, stitch-forming mechanism, work-feeding mechanism and a work-trimming mechanism; a hemming attachment for hem-folding a workpiece and directing it to said mechanisms comprising a hem-foldingblade, a carrier to which said blade is secured, a vertically disposed supporting bracket having its upper end secured to said frame, means pivotally mounting said carrier on said bracket, means for adjusting said bracket horizontally in transverse directions, an edge-guide cooperating with said hem-folding blade, and means for supporting said edge-guide for horizontal floating movements.

14. In an overedge sewing machine having a frame, a work-support, stitch-forming mechanism, work-feeding mechanism and a work-trimming mechanism; a hemming attachment for hem-folding a workpiece and directing it to said mechanisms comprising a hem-folding blade, a carrier to which said blade is secured, a'vertically disposed bracket having its upper and secured to said frame, means pivotally mounting said carrier on said bracket, means for limiting the pivotal movement of said carrier on said bracket, an edge-guide cooperating with said hem-folder, and means for supporting said edge-guide from said frame below and independently of said bracket.

15. In an overedge sewing machine having a frame, a, horizontally disposed work-support, stitch-formin mechanism, work-feeding mechanism anda work-trimming mechanism; a hemming attachment for hem-folding a workpiece and directing it to said mechanisms comprising a vertically disposed bracket having its upper end secured to said frame above the level of said work-support, the lower end of said bracket being adapted to support any one of a plurality of carrier-blocks each fitted with a different form of hem-folding blade each of which is designed to form an s-shaped fold inthe marginal portion of a workpiece, and an edge-guide supported on said frame below said work-support and cooperating with said hem-folding blades in directing the folded workpiece to said mechanisms.

16. In an overedge sewing machine having a frame, a worksupport, stitch-forming mechanism, work-feeding mechanism and a worktrimming mechanism; a hemming attachment for hem-folding a workpiece and directing it to said mechanisms comprising a supporting bracket secured to said frame, a carrier pivotally secured to said bracket, a hem-folding'blade pivotally mounted on said carrier on an axis parallel to the pivotal axis of said carrier, and an edgeguide supported by said frame and icooperating with said hem-folding blade. j

1'7. In an overedge sewing machine having a frame, a work-support, stitch-forming mechanism, work-feeding mechanism and a work-trimming mechanism; a hemming attachment for hem-folding a workpiece and directing it to said mechanisms comprising a vertically disposed supporting bracket-secured at its upper end to said frame, a carrier pivotally mounted on the lower portion of said bracket, means for limiting the pivotal movement of said carrier on said bracket,

a hem-folding blade pivotallymounted on said carrieronan axis parallel to the pivotal axis of the carrier, and an edge-guide supported by said frame and cooperating with said hem-folding blade.

, 18. In an overedgesewing machine having a frame, a work-support, stitch-forming mechanism, work-feeding mechanism and a worktrimming mechanism; a hemming attachment for hem-folding a workpiece and directing it to said mechanisms comprising a vertically disposed supporting bracket secured at its upper end to said frame, a carrier pivotally mounted on the lower portion of said bracket, means for limiting the pivotal movement of said carrier on said bracket, a hem-folding blade pivotally mounted on said carrier on an axis parallel to the pivotal axis of the carrier, spring means normally tending to turn said hem-folding blade upwardly about its pivotal axis, and a manually releasable latch for holding said blade in its operative position in opposition to said springmeans.

19. In an overedge sewing machine having a frame, a work-support, stitch-forming mechanism, work-feeding mechanism and a worktrimming mechanism; a hemming attachment for hem-folding a workpiece anddirecting it to said mechanisms comprising a vertically disposed supporting bracket secured at its upper end to said frame, a carrier pivotally mounted on the lower portion of said bracket, means for limiting the pivotal movement of said carrier on said bracket, a hem-folding blade pivotally mounted on said carrier on an axis parallel to the pivotal axis of the carrier, spring means normally tending to turn said hem-folding blade upwardly about its pivotal axis, a latch for holding said blade in its operative position in opposition to said spring means, a latch-releasing lever mounted on said carrier and having a manually engageable portion projecting upwardly above the carrier, and an edge-guide supported by said frame and cooperating with said hem-folding blade.

20. In an overedgesewing machine having a frame, a work-support, stitch-forming mechanism, work-feeding mechanism and a work-trimming mechanism; a hemming attachment for hem-folding a workpiece and directing it to said mechanisms comprising a vertically disposed supporting bracket secured at its upper end to said frame, a carrier pivotally mounted on the lower portion of said bracket, means for limiting the pivotal movement of said carrier on said bracket, a member pivotally mounted on said carrier and provided with a cam surface and a retaining notch, a hem-folding blade secured to said member, spring means acting on saidmember and normally tending toturn the member and the blade carried thereby upwardly about the pivotal axis of the member, a spring-pressed latch element mounted on said carrier and normally engaging said notch tohold said member and blade in their lowermost positions, and a finger-piece mounted on said carrier and engaging said latch element'to withdrawit from said notch to permit limited upward movement of said member under the influence of said spring means, said latch element reacting upon said cam surface, when said 49 finger-piece is released, togive to said member further upward movement, 7

21. In an overedge sewing machine having a frame, a work-support, stitch-forming mechanism, work-feeding mechanism and a work-trimming mechanism; a hemming attachment for hem-folding a workpiece and directing it to said mechanisms, comprising a hem-folder secured to said frame above the plane of said work-support, an edge-guide cooperating with said hem-folder and secured to said frame below the plane of said work-support and means for adjusting saidhemfolder horizontally in a plurality of directions relative to the line of seam formation.

NICHOLAUS KNAUS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

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