US2678617A - Machine for sewing piping to two superposed layers - Google Patents

Description

J. E. WALSH May 18, I954 MACHINE FOR SEWING PIPING TQ TWO SUPERPOSED LAYERS 4 Sheets-Sheet 1 Filed June 6, 1951 Inventor John E Walsh 53 ms Attorney May 18, 1954 J. E. WALSH MACHINE FOR SEWING PIPING TO TWO SUPERPOSED LAYERS Filed June 6, 1951 4 Sheets-Sheet 2 6 6 m M ,0 w Q f i u n L m w H E .w 4 u n l n I I l !|L| lllllllllllllllllll Ilkll n n n M 1 J 1 J n Li B M W \i! 0 n .illllallllumlhhflflu. 5%-? May 18, 1954 J. E. WALSH 2,678,617

MACHINE FOR SEWING PIPING TO TWO SUPERPOSED LAYERS Fild June 6, 1951 4 Sheets-Sheet 5 30 J W: H 4

YI- I YII 3e 16 .F I 7 Z0 Z2 I 20 19 1 4 J 1 g0 37 w 6/ j 6 1a 6 Inventor JohnEWzla/z By his Attorney J. E. WALSH May 18, 1954 MACHINE FOR SEWING PIPING TO TWO SUPERPOSED LAYERS Filed June 6, 1951 4 Sheets-Sheet 4 Inventor John E Walsh By has Attorney Patented May 18, 1954 GMAOHI'NEEORSEWING PIPING TO TWO "SUPEEPOSED LAYERS John E. Walsh, Beverly, Mass, assignor to United "shoeMachinery CorporatiomFlemington, N. J

a=corporation o'fNew Jersey Application-June 6, 1951, Serial No. 230,147

14 Claims.

.-The present inventionrelates .toimprovements iinsewing-machines for operating ,upon two super- ,posedlayersof. materitrLtheedgeof .one of which .reguires trimming to bring it into register with Ether edge' of the 1 other and. .between which L layers the flange portion vof 7a; pipingistripiis. to'be sewed .withiabeadr onthe strip drawnintoizlose fitting ...relation..to1.the..edgesrofthe material. In certain .respectsithe.presentinvention is. an improvement cover-that. disclosed. iniUniteid.StatesLetters Pattent, No. =1,-820;829, .;granted August .25, 1 1931, upon application. of. Ray.

. ..'Ihe.1machine=of..the inventionwis intended to rsew the lining toitheruppertofia shoeand to insert into theseamapipingnstrip whichconceals 1 .thewedges 1 of 'theilining .,.and .upper 1. and provides an. ornamentalifinish' tor theedges orthe material ..operated upon.

.Anobiectiof the invention is to, provide ama- .,chine.capable .oftrimmingthe surplus from one edge ..of1- twosuperposed layersof material to bring theiredges intoregister,.ofinserting in an ad- .vantageousmannerhetween the layers the flange ..portion of a,.piping. strip. and. thereafter of sew- .ingthe edges andpiping strip together ina single .continuousoperation. A secondary obiect is to ,1pr.ovide.-such machine with suitable and convenient adjustments and readily accessible operatingmechanisms'ior the diiierent work perform .ing instrumentsincluding alknife for trimming the material operated upon and a piping strip .jguidelior positioning thestrip in proper relation between the layers of material.

.In its illustrativeiform. the machine is equipped with the usual stitch forming devices, an edge &ge, atrimming knife provided with its cutting :edgedisposed to cut. the material operated upon, .a work support and a member located along the line or the seamrinserted in advance of the point of operation of the stitchingformingidevices to .separate the layers of the material so that the knife will: trim one'layer only,.in which a guide parent from the following detailed description or a preferred construction taken in connection with the accompanying drawings, in which:

Fig. 1 is a viewin side elevation looking from the rightoia portion of a sewing machine embodying the features of thepresent invention;

Fig. 2 is. a plan view on an enlarged scale of the lower portion in the machine illustrated in Fig. 1;

Fig. 3 is a detail plan View of a portion ofthe mechanism for locking a knife actuating finger in knife engaging position;

Fig. ii is a sectional view of the parts illustrated in Fig.3 taken along the line'IV-JV;

Fig. 5 is a sectional view on an enlarged. scale, including two superposed'layers of material in the process of being operated upon as seen along the line V-V of Fig. 2;

Fig. dis a sectional view taken alongthe line VIVI of Fig. 5;

7 is a similar sectional view taken along the line VIl-VII of. Fig. 5;

Sis a detailplanview showing'the manher of operation of the piping strip guide and a portion of the edge gage-shown in section;

Fig. v9 is a similar view ofthesame parts omitting the edge gage and a coverior a piping strip supporting and layer separating plate;

Fig. 10 is a detail perspective view on a further enlarged scale of ,a trimming-knife supporting slide in the machine;

Fig. .11 is. a similar view of the trimming knife; and

Fig. 12 isan enlarged sectional view taken along the line XIX-XII of. Fig. l.

Themachine illustrated in the drawings is intended to finish the combinededges of two layers of material disposedin superposed relation to each other with one edge projecting beyond the other, by inserting and securing between thema beaded piping. In order to insure a workmanlike result the wider layer of material is'trimmed to bring it into register withthe narrower layer and thebead on thepiping is brought into accurate engagement with the trimmed edges of both layers. The layers and piping are combined by sewing, the machine being equipped with a straight eye-pointed needle and other lockstitch forming devices as well aswith an edge trimmer similar tothat of United States LettersPatent Re. No. 7,860, reissued, August'28,ll87'l, upon application of L. L. Barber.

Referring more .particularlyto Fig. l of the drawings the needle isflillnstratedatl and cooperates with other stitch forming jdevices (not shown) to sew together the edge portions of superposed layers of material comprising a shoe upper 4 (see Figs. 5 and 6) and its lining 5 supported at the operating point of the needle by a work plate 8 and a pair of work clamping and feeding rolls Hi and I2, the lowermost one of which is mounted for rotation below the work plate and is driven by a bevel gear 14 (Fig. l) meshing with bevel teeth on the side of the roll l2. According to usual shoe making practice the lining for the upper has a wider edge than the upper itself and projects therefrom, the lining usually being attached to the upper with the edge of the upper at a distance from the edge of the lining. To guide the narrower layer of upper material and wider layer of lining material the edge of the upper contacts a gage i6 located to bring the upper edge into vertical alinement with a vibrating trimming knife 1% mounted on the machine in close proximity to the edge gage Hi for reciprocating movement along the rearward side of the work plate. The knife accordingly trims the edge of the wider lining layer which projects beyond the upper into accurate register with the edge of the upper. To enable the knife to trim the lining without engaging the upper the two layers of material are separated at the point of operation of the knife by a piping strip flange supporting member 20 projecting between them with its work engaging end located along the seam line a short distance in advance of the point of operation of the stitch forming devices and between the trimming knife and the sewing point.

To apply a piping strip to the edges of the material it is impossible to employ the usual form of piping strip guide on account of the location of the trimming knife close to the sewing point, it being necessary to insert the piping strip withinthe short distance between, the edge of the trimming knife and the sewing point. In inserting the piping strip within this short distance an improved form of guide has been provided especially eiiective in its action of projecting the flange portion of the strip to its full width between the edges of the layers operated upon within the limited distance along the edges available for this purpose.

The piping strip guide of the present invention comprises a dished wheel 22 having a circular concavity about its rim within which the piping strip is retained, the strip being wrapped through an are about the edge of the wheel 22 of about 180. The wheel is rotatably mounted on a frictionless bearing 2d best shown in Figs. 5 and 6, disposed with its axis of rotation inclined with respect to the plane of the layers of work material engaging the work supporting surface of the work plate 8. The guide wheel acts to project the flange of the piping strip between the separated layers of material operated upon at a point along the seam line between the trimming knife and the sewing point. The inclination of the guide wheel is such that one edge of the wheel lies substantially above the level of the work material and the other edge of the wheel lies in the plane of the material. To retain the flange of the piping strip within the concavity at the edge of the Wheel as the wheel rotates the supporting member 2e surrounds the periphery of the wheel with a guiding surface arranged parallel to and in line with the dished rim of the wheel.

The piping strip flange supporting member 2!) is in a form of a recessed plate carried by an adjustable mounting block 2E5 (see Fig. l) slidable in two directions at right angles to each other for varying the projection of the piping strip flange between the layers of material and for centering the flange on the piping strip accurately between the layers. The block 28 and the piping supporting plate also serve as a mounting for an inclined spindle 28 passing through the bearing 24.

To confine the flange of the piping strip in the recess of the supporting plate, the supporting plate has secured to it a cover 30 also surrounding the periphery of the guide wheel 22. The cover is disposed in spaced parallel relation to the supporting plate and also is arranged to enter between the layers of the work material in close proximity to the layer separating end of the supporting plate. In this way engagement of the flange on the piping strip is kept from contact with either layer of the material until the piping strip enters to the extent of its full width between the layers, the bead of the strip being pressed firmly against the edges of the upper and lining so that close contact be tween the parts is obtained. As shown in the upper sectional illustration of Fig. 6 of the bead of the strip is formed with shoulders, indicated at 32, extending at an acute angle to the flange. When the strip reaches the lower edge of the wheel and its flange is pressed widthwise between the upper and lining layers, the shoulders on the bead are pressed firmly against the edges of the layers and flexed away from the flange to give a more positive contact with the edges of the layers, as shown in the lower sectional illustration of the strip in this figure.

To maintain the edge gage l6 uniformly in yielding engagement with the edge of the upper 4 the edge gage is constructed in the form of a reversely bent plate secured to a block 34 (see Fig. 1) having a pivotal mounting 36 in ears projecting from the cover plate 30. The edge gage plate has a horizontal flange portion projecting above the margin of the upper and an edge contacting nib 31 projecting downwardly from the flange. The central portion of the plate has a slot 33 through which passes one end of the inclined spindle 28. Surrounding the upper end of the spindle is a compression spring 46 confined between a check nut 42 .on a threaded portionof the spindle and the upper surface of the gage plate in a manner to press the flange of the gage uniformly with resilient pressure against the marginal portion of the upper 4. At the same time irregularities in the thickness of the material operated upon will enable the gage to be swung clear of the irregularities or a new piece of work material to be forced beneath it in bringing the work to properly adjusted operating position. The work engaging end of the gage i6 is ofiset to clear the needle path.

For adjusting the piping strip guide in two directions at right angles toeach other the block 26 is mounted for sliding movement in a vertical guideway portion of a horizontally sliding block 44 (see Figs. 1 and 12). The vertical position of the block 26 in the guideway of the block 44 is adjusted by a thumb screw 46 threaded into the block 26 and having the under surface of its head engaged by the upper edge of the block 44. To insure engagement of the head on the thumb screw 46 with the block 44 and to lock the block 26 in vertically adjusted position the thumb screw 46 is engaged by the lower end of a second thumb screw 48 threaded into a yoke 56 secured to the upper ends of the guideway in the block 44. The

newsman 'rthumb 'screw M8 Fenables theiheaii onfthezthumb ecrewlfi'tdrbe clamped -seeurely againsttthe upper surfaee'df the 'guideway in' the 'kilo'ck fl. ro-prevent release of =-the-elamping-= thumb screw 48 :it carries a 'check nut '2 xacting ag-ainst the upper surfaoeoftheyoke- M.

*The sliding-"block 4'4 is supported in a pivotally amounted carrier- 54'restrained in position by the engagement mat a latch 56 *comp-rising :a lever 'fulcrumed on =a 'screw -58 tthreaded into a fixed bracket lill projecting rearward'ly irom the irame of the machine. 1 Movement =-0f the horizontally sliding block-W4 is-adj usted by a thumb screw 62 *rotating in a bearing fi lwon the carrier fi, the thumb screw 62 'Ibeing 'e'oniine'd against length-- "wise movement-imthe bearing hetween the -hea'd 'of the thumb-'screw an'da collar 65* on the screw.

"The-thumb screwii 2enters a threaded opening in theblockifl'so that=rotation cf the thurrlb' screw *moves the block in -the horizentalguideway of the carrier. 'The carrier'is pivoted-at -68 to swing "on "the bracket BI) "about a"horizonta1 "axis and upon disengagement 'of theiatch 56 with the carrier the entire "piping strip guide and its mounting may be'swung from the-solid".line*posi- 'tion'ofFig. 1 to the raised dot-dash line position, the underlying "parts-of the "machine-'then being exposed an'dreadily adjusted or replaced.

The trimming knife I*8isbest"shown'in Figxll and consists of'athin'narrowwidth of'shee'tsteel -provided. with'afihookedputting edge "l'fl and a perforated tongue m arranged to be i received in -a :recessed area "of a 'sliding dovetail -block 154. The :hlockflflhas a dowel pin lfilocatedtoenter theperforation'in thetongue I2. When-inplace .;:on the block the "knife slides in "a vertical posi- *tion"againStJaTearWaTdf'facepf the-work" plate 8.

"T0 supportthe' knife" block 14 dovetail guideway isiformed -at therear loweryportion o'fthework "plate .8. "For reciprocating the knife thehblock "Mhas anotch TBiengage'd bya balrended finger L80 '(see'Figsl toi3) pivotal lymountedon af-hori- "zontal oscillating arm 82 secured to ai'hollow vertical rockshaft 84 "rotating at its upper "end in hearings in ,the" bracketiBIl and;ati its loweren'd in a bearingtlifi in'the machineframe. Atxthe lower end 'of the 'rockshalft isp'la-mpedranarm "88. having. at itsifree' end a springmressedmlunger 90 engagin a ;perf-oration in one arm -of an "oscillating f. lever 92 secured to a "vertical ""shaft v.94 rotatable. in'rbeariingsi $6 in the 'machineffframe, said bearings'being forme'd inralinement with thelbearings forfthe,rockshaftllfl. T'Another "arm ,er the lever? B 2 'is "pivotally connectedto ;a yoke 98 within which is slidably mounted afrectangular ,block I00 rotatable son .a screw IJIlZ Ithreaided .eocentricallyinto theendlof a: rotating horizontal shaft JIM-driven fromasource of power sep from that for operating theemachine, thee-shaft r I04 "being rotatable; in :the -.machine.iframe.

I :The; pivotal mounting :of theifingertiifl on the :arm @8 2 -includes a in -I Ii figp-assing through. lugs ton r aiwrizontal plate 11418 sand through theaream- 1: ward.endtof:thezosdillatingsarm: 8'2; asrhesteshcwn l,

:in Fig.5:3. Theplate a! l'iflr' formsaa supports-form -w'elbow pieces I It to which it :isasecurectandzwhich in turn :earr-ie's the 'knife actuating fingertw. "The rearward end of theiilate l otlisibent downweirdly to-serve'as 'a' stop with apairof rearward "project-ions from thearm 82 (Fig.1) acting to "limit-the swinging movement of the knife=actuat ing finger upwardly' away fromithe block ld. -To "enable thefpiate I ll8- iand' the 'finger-82 tribe: raised easil-y the "pin W6 has snr-romid-mg i-t e. torsion' V free endstthe latch-aarms I-. I 6 :are provided hookswhi choverlap zthexsidezedgessdf theplate I08 and -=ar.e connected :together by :a itension spring I I9. Mfihen in! trim-position oflrFigiByithe plate is decked in operative position with :the fingenfill engaging: the notch inzth efknife' rblocksxtl'.

To unlock the finger ifillzforwerticalsswing'ixig movement .out of cengagement :iwith "tithe irlmife block I4 after the upiping strip zrguide i'carrier swung to its raised "position tthedatohtarm-Silii have lug: portions disposedmidwayibetweenttheir ends in a position to be cengaged by a mental enlargement onamanual1y:actuaterlslverticalfislide rod H20 mount-ed withinztherrockshaft= 84 (see Fig. 4). The-slidero'd 120 has a roundedmpper end for: engagementlby the operators fingerzaamd isarranged when: depressed ;;by the 'operator'rto separate the latch arms Hi6 from iengagemient with 'the finger carrying :plate 1 I08. The ffmger carryingpl-ate then is f1'eedfor 11pWard1-move ment by the spring 1 I I2 so :that i? theTfingertIBIl :is raised from engagement with 'ithe knife rliiok 14.

T prevent thefinger all'Trom:beinglfdisengaged from "the knife -:block i14"beiore :theapipingtstrip guide wheel 22 and thelayer supportingmen'iber 2 e "are raised from operative "positions'tthe I031- "rier 54 -actswas-*aacover forthe upperrerid :ofithe control-rod I20. when' ithe' carrier; isiin itsilower IatchedpQSi-tion'it blocks access to the manualty actuated control-rodilzll and' prevents 'theffin'ger carryingplate I 08 'from' being-unlatched.

As a further convenience in zrendering rthe knife 'andsupporting -hlock 'M accessible "for assen'ibly "or 'disassembly the finger 8i) togetherrwith the oscillating arm 82 may be swung "to stone side away from its' operative :"position. if For rtlns 'purpose the plungereu'is raise'dfrom: engagement with the pefforation in the arm 92, #thus 'pro v-iding "a disconnectable connection .in Ithe warm oscillating mechanism. In t thej'iillustratedlma- "chine this connection is disconnectedvat-xthe same time :as and in a single -operation with thetmilocking/action or the latch arms L I I6. Toiffacili- "-tate quick discormection the-rod l2Il extends 'dowrmvardly the entire length --'of" the rock'shait 8! =ar1d intoan axial passage in t-he shaft 4 The lower end of the rod is engaged by acompression spring I 22 zsinside-ithe shaft wil -to retain the rud H20 in raised inoperative-position. "Between the rockshaft and the I shaft M the rod I28 i'has a section of reduced diameter which is-engaged -by one *arm 0f "a lever IZQ 'a'fulcrumed eon a. *shoiilder screw I26 carried by"the-armfifi. The other end of? the lever I224 has an-opening through -which="passes thespring pressed plunger :90, ithe lever engaging the plunger' beneath an-e'enlarged mead on theplunger. When the rod isfdepressed to unlock f the finger carrying" plate 4118 the-lever 124 aisoraisesthe plunger from i:-en- "g-agement with the actuating lever fli. Therockshaft is then actuated ima clockwise :directionzhy a spring I213 coiled vabout ithe rockshait when the aapl-unger is-raise'd, "the semis cor ethe aspiring being engage'd with the machine i-framesazidea collar I30 on the rocks'haft, respectively. .The carrier 54 in its latched position not only prevents the finger carrying plate from being unlocked but also prevents disconnection of the disconnectable connections of the knife oscillating mechanism. To return the rockshaft to running position the central portion has clamped to it a winghandle I32.

Disengagement of the finger 8!! from the recess in the knife block it enables the knife block tobe removed from its guideway. With the removal of the knife block from the guideway the knife itself is readily disconnected therefrom and is available for resharpening or replacement.

The nature and scope of the invention having been indicated and an embodiment having been described, what is claimedis:

'1. Asewing machine for operating upon two layers of material, the edge on one of which projects beyond that of another, said machine having stitch-forming devices, an edge gage for the narrower layer, a trimming knife for the wider layer mounted in close proximity to the edge gage and disposed along the line of the seam inserted adjacent to and in advance of the point of op- .eration of the stitch forming devices to out said layer, a work support, and a member located along the line of the seam inserted in advance of the point of operation of the stitch-forming devices to separate the layers of said material and to cause the knife to trim one layer only thereof, in combination with a guide for a flanged piping strip acting along the seam line between the trimming knife and the sewing point to project the flange on the piping strip between the separated layers of material.

2. A sewing machine for operating upon two layers of material, the edge on one of which projects beyond that of another, said machine having stitch-forming devices, an, edge gage for the narrower layer,-a vibrating trimming knife for the wider layer mounted in close proximity to the edge gage and disposed along the line of the seam inserted adjacent to and in advance of the point of operation of the stitch forming devices to out said layer, a work support, and a member spaced from the work support in advance of the point of operation of the stitchforming devices to separate the layers of said material and located along the line of the seam inserted between the sewing 'pointand the cutting edge of the knife, in combination with a guide comprising a wheel about whichone edge of a piping strip is wrapped mounted between the trimming knife and the point of operation of the stitch forming devices to project a flange on the piping strip between the separated layers of ,the material.

3. A sewing machine for operating upon two layers of material, the edge on one of which projects beyond that of another, said machine having stitch-forming devices, an edge gage for the narrower layer, a vibratingtrimming knife for the wider layer mounted in close proximity to the edge gage and disposed along the line of the seam inserted adjacent to and in advance of the point of operation of the stitch forming devices to out said layer, a work support, and a member spaced from the work support in advance of the point of operation of the stitchforming devices to separate the layers of said material and located along the line of the seam inserted between the sewin point and the cutting edge of the knife, in combination with a guide .,-located-between the knife and the point of operation of the'stitch forming devices comprising a. wheel about which one edge of a piping strip is wrapped mounted to project a flange on the piping strip between the separated layers of the material, said wheel having a concavity about its rim for preventing displacement of said strip.

4. A sewing machine for operating upon two layers of material, the edge on one of which projects beyond that of another, said machine having stitch-forming devices, an edge gage for the narrower layer, a vibrating trimming knife for the wider layer mounted in close proximity to the edge gage and disposed along the line of the seam inserted adjacent to and in advance of the'point of operation of the stitch forming devices to out said layer, a work support, and a member spaced from the work support in advance of the point of operation of the stitchforming devices to separate the layers of said material and located along the line of the seam inserted. between the sewing point and the cuttingedge of the knife, in combination with a dished wheel between the knife and the point of operation of the stitch forming devices rotatably mounted about an axis inclined with respect to the plane of the layers of material operated upon to bring one edge of the wheel substantially above the level of the material onerated upon with another edge of the wheel lying in the plane of the material.

5. A sewing machine for operating upon two layers of material, the edge on one of which proects beyond that of another, said machine having stitch-forming devices, an edge gage for the narrower layer, a vibrating trimming knife for the wider layer. mounted in close proximity to the edge gage and disposed along the line of the. seam inserted adjacent to and in advance of the point of operation of the stitch forming devices to out said layer, a work support, and a member spaced from the work support in advance of the point of operation of the stitchforming devices .to separate. the layers of said material and located along the line of the seam inserted between the sewing point and the cutting edge of the knife, in combination with a guide comprising a wheel about which one edge of a piping strip is wrapped mounted between the knife andthe point of operation of the stitch "forming devices to project a flange on the piping strip between the separated layers of the mate- ,rial, and a cover surrounding the periphery of the guide wheel in parallel relation to the layer separating member to confine the flange of the piping strip on the edge of the wheel as the wheel rotates.

6. A sewing machine for operating upon two layers of material, the edge on one of which projects beyond that of another, said machine having stitch-forming devices, an edge gage "for the narrower layer, a vibrating trimming knife for the wider layer mounted in close proximity to the edge gage and disposed along the line of the seam inserted adjacent to and in advance of the point of operation of the stitch forming devices to out said layer, a work support, and a member spaced from the work support in advance of the point of operation of the stitchforming devices to separate the layers of said material and located along the line of the seam inserted between the sewing point and the cutting edge of the knife, in combination with a guide comprising a wheel about which one edge of a piping strip is wrapped mounted between the knife and the point of operation of the stitchscreen forming: devices -toaproject.aaflange on the; pip,- ing-striprbetween, the separated layers pf; thermal terial; and 1 at cover: disposed .1 in parallel; relation togithexlayen separating member and arranged to enter betweenthe layersof thematerial operated upon in. close proximity to; i the layer; separating member to-preventz' engagement. ofythetflangaon the piping stripwithpeither layer of; material.-

7. A sewing.- machine for. operating.- upon two layers of material, theedgea" on; one of which projects beyond: that of another, said machine having; stitch-forming; devices,- aned fl 1 gage-.-; for the narrower; layer, at trimming; knife. for the widerlayer, mounted: in. closeproximitw to the edge gage and disposedia long, the line. of the seam ginserted adjacent to. and in; advance. of .the

pointtof operation of the-:stitch-iorming devices.

toscut said layer, aworktsuppont, and a; member located. along, the. line of the seamtinserted. in adv-anceof thepointroioperation of the. stitchforming devices: to. separate. the layers of; said material to cause; theknife. to. trim. one; layer only; thereof, in combination with. a; guide 1 for. a piping strip acting alongthe seam line between thetrimming-knife andthe point-of operationqof the stitch.--forming devices to proj ectthe flange between the separated layers) of. material, a; pivotalz mounting for the. edge gage to enable. the gage .torbe swung clear. of 1 the material operated upon; and resilient means for maintainingv the edge, gage. yieldinglyin engagement with the untrimmed-layer. of material.

8.. Atsewing, machine for operating, upon .two layers .of material, the. edge ofone ofwhich. pro.- jects .beyond that. of another, said. machine. havingstitch-forming devices, avibrating trimming knife. mounted. in close. proximity to the. edge gage. and-,disposedalongthe line. of the. seam inserted adjacent to.and-,in:advance. of the point of. operation of the .sti-tcheforming; devices to cut the material operatedupon, a-work support and .amember. spaced from. the worksupportin advance. of the-point of operation of. the. stitchforn'iing. devices .to separate the. layers: oftsaid material, and located. along the. lineof. the seam between the sewing 1 point and. the. cutting, edge of; the knife,- intcombination. with a-. guide. comprising.a..wheel.about whichoneedgeof a piping .strip, is. wrapped, ,mounted between the knife andlthepoint of operation of-.the.stitch-forming devices to. project a flange on. thepiping strip between the separatedlayers of .the. material,. an edge gage .for. guiding. thenarrower. edgaofi the material mounted. opposite. the point of. operation of the knife to cause the widerredgatmbe:

cally with the guide wheel-formaintaingtheedge gage: yieldinglyin engagement with: the: narrowerv edge of the material.

9. A sewing machine for operating upon two layers of material, theedge onone of which projects-beyond that ofanother, said machine-having stitch-'i'ormingdevices, an edge gage-donthe narrower t layer, a vibrating trimming knife for the wider layer mounted in close proximity to the edge gage and disposed along the line of the seam inserted adjacent to and in advance of the point of operation of the stitch forming devices to out said layer, a work support, and a member spaced from the work support in advance of the point of operation of the stitchforming devices to separate the layers of said curately between they said. layers.

10. Asew-ing machine. for operatingupontwo layers of. materiai, the edge on one, of which projects. beyond. that of anothensaidmachine having stitch-forming devices, an edge gage. for the; narrower. layer, a; vibrating trimming knife for thewider layer mounted in close proximity to, the edge gage and disposed. along the .lineof the.- seam. insertedadjacent to and. in advance of the pointy. of operation of the stitchforming devices. to out said layer, a work support, and amember spacedtfrom the work support-invad vanceof the point of operation of the. stitchi'orming devices to. separate. the layers of, said material and located along the line. of theseam inserted between thesewing point and the cutting edge of the; knife, in combination with a guide comprising a wheel about which one edge. of. a piping, strip is wrapped mounted between the knife and the point of operatiomof the stitch forming devices to project'avflangeon-the piping strip,- between. the separated. layers of. the material, amountinglolock for the guide-wheel and thelayer supporting member, and av pivotally mounted carrier for the mounting blockarranged to. swing vertically about .ahorizontal 1 axis.

ILA. sewing" machine for operating. upon a two layers. of materiaL'theedge onone of, Which projects beyond that of another, said machine .havingstitch-forming. devices, an edge gage. t forythe narrower layer, avibrating. trimming. knifefor the--wider-;layer mounted. in close. proximity to the edge gage anddisposed along theline oi the seam inserted-adj aoent to andsin advanceof the point ,of operation of. the stitch forming devices .to.-cut said layer, a worksupporaand azmemher spacedfromthe worksupport in advance oiflthe point of j operation. of the stitch-forming, devices tov separate the-layers; of. said material-anddocated along the. line of the. seam. insertedv between-the sewing. point andthe cutting edgerof the-knife, in combination with a guide'comprising; a wheel about which one edgeof. a piping strip; is wrapped mounted between the-knit e and thapointaof operation. of the stitchforming de vices. to project a flange on the piping StliiQxbB- tween: the; separated layers of l the: material,-, a mountingblook for the guide wheel and the layer supporting; member, a fixed bracket; a. carrier for; the mountingblock pivotally mountedonthe bracket, and arranged to :swing; vertically-aahout'sa horizontal axis-and. alatch supporteds on onemf two: partseincluding; the: carrier andzits mounting bracket and arranged to engage the other of said parts for preventing vertical swinging movement of the carrier from operative position during sewing operations.

12.A sewing machine for operating upon two layers of material, the edge on one of which projects beyond that of another, said machine having stitch-forming devices, an edge gage for 11 the narrower layer, a vibrating trimming knife for the wider layer mounted in close proximity to the edge gage and disposed along the line of the seam inserted adjacent to and in advance of the point of operation of the stitch forming devices to out said layer, a work support, and a member spaced from the work support in advance of the point of operation of the stitchforming devices to separate the layers of said material and located along the line of the seam inserted between the sewing point and the cutting edge of the knife, in combination with a guide comprising a wheel about which one edge of a piping strip is wrapped mounted between the knife and the point of operation of the stitch forming devices to project a flange on the piping strip between the separated layers of the material, a mounting block for the guide wheel and the layer supporting member, a fixed bracket, a carrier for the mounting block pivotally mounted on the bracket and arranged to swing vertically about a horizontal axis, a latch supported on one of two parts including the carrier and its mounting bracket and arranged to engage the other of said parts for preventing vertical swinging movement of the carrier from operative position during sewing operations, and mechanism for actuating the knife including an oscillating arm, a block on which the knife is supported, a finger pivotally mounted on said arm and arranged to engage or disengage the knife supporting block upon swinging movement about its pivotal mounting, and means for locking the finger from diseimagement with the knife block.

13. A sewing machine for operating upon two layers of material, the edge on one of which projects beyond that of another, said machine having stitch-forming devices, an edge gage for the narrower layer, a vibrating trimming knife for the wider layer mounted in close proximity to the edge gage and disposed along the line of theseam inserted adjacent to and in advance of the point of operation of the stitch forming devices to out said layer, a work support, and a member spaced from the work support in advance of the point of operation of the stitch-forming devices to separate the layers of said material and located along the line of the seam inserted between the sewing point and the cutting edge of the knife, in combination with a guide comprisa ing a wheel about which one edge of a piping strip is wrapped mounted between the knife and the point of operation of the stitch formingdevices to project a flange on the piping strip between the separated layers of the material, a mounting block for the guide wheel and the layer supported member, a fixed block, a carrier for the mounting block pivotally mounted on the bracket and arranged to swing vertically about a horizontal axis, a latch supported on one of two parts including the carrier and its mounting bracket and arranged to engage the other of said parts for preventing vertical swinging movement 1 of the carrier from operative position during sewing operations, and mechanism for actuating the knife including an oscillating arm, a block on which the knife is supported, a finger pivotally mounted on said arm and arranged to engage or disengage the knife supporting block upon swinging movement about its pivotal mounting, means for locking the finger from disengagement with the knife block, and a disconnectable connection for oscillating the arm arranged to be released simultaneously with the unlocking action of the finger from the oscillating arm.

14. A sewing machine for operating upon-two layers of material, the edge on one of which projects beyond that of another, said machine having stitch-forming devices, an edge gage for the narrower layer, a vibrating trimming knife for the wider layer mounted in close proximity to the edge gage and disposed along the line of the seam inserted adjacent to and in advance of the point of operation of the stitch forming devices to out said layer, a work support, and a member spaced from the work support-in advance of the point of operation of the stitchforming devices to separate the layers of said material and located along the line of the seam inserted between the sewing point and the cutting edge of the knife, in combination with a guide comprising a wheel about which one edge of a piping strip is wrapped mounted between the knife and the point of operation of the stitch forming devices to project a flange on the piping strip between the separated layers of the material, a mounting block for the guide wheel and the layer supporting member, a fixed bracket, a carrier for the mounting block pivotally mounted on the bracket and arranged to swing vertically about a horiozntal axis, a latch supported on one of two parts including the carrier and its mounting bracket and arranged to engage the other of said parts for preventing vertical swinging movement of the carrier from operative position during sewing operations, and mechanism for actuating the knife including an oscillating arm, a block on which the knife is supported, a finger pivotally mounted on said arm and arranged to engage or disengage the knife supporting block upon swinging movement about its pivotal mounting, means for locking the finger from disengagement with the knife block, a disconnectable connection for oscillating the arm, and a manually actuated control rod for disconnecting the disconnectable connections and for unlocking the knife actuating finger from the oscillating arm in a single operation, said mounting block carrier acting as a cover for the control rod to block access to said rod when the guide wheel and layer separating member are in operative position.

References Cited in the file of this patent UNITED STATES PATENTS Name Date 273,915 Turner Mar. 13, 1883 460,776 Hatch Oct. 6, 1891 1,820,330 Ray Aug. 25, ,1931

, 1,891,029 Stein Dec. 13, 1932 1,923,556 Sanborn Aug. 22, 1933 1,963,933 Card June 19, 1934 2,393,292 Coates Jan. 22, 1946

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