US2475759A - Sewing machine and attachment therefor - Google Patents

Description

C. SEAMAN SEWING MACHINE AND ATTACHMENT THEREFOR July 12, 1949.

6 Shets-Sheefo 1 Filed July 21, 1947 INVENTOR.

M M E 5 a L M A TORNEK July 12, 1949 c, SEAMAN 2,475,7i5$

- SEWING MACHINE AND ATTACHMENT THEREFOR Filed July 21, 1947 6 Sheets-Sheet 2 INVENTOR. ch04 A31. 55 SEAMAN Arrows-x July 12, 1949. ,c. SEAMAN SEWING MACHINE AND ATTACHMENT THEREFOR Filed July 21, 1947 6 Sheets-Sheet 3 IN VEN TOR. CHARL 5 JIM/MAN A TTORNEX July 12, 1949. c. SEAMAN I I SEWING MACHINE AND ATTACHMENT THEREFOR 6 sheets-sheen;

Filed July 21, 1947 IN VEN TOR. cHA/PL 5 SEAMAN A TTORNEX July 12, 1949.. c. SEAMAN SEWING MACHINE AND ATTACHMENT THEREFQR Filed July 21, 1947 GShe'ets-Sheet' 5 A TTORA/E'K July 12, 1949. c. SEAMAN in 2,475,759

SEWING MACHINE AND ATTACHMENT THEREFOR 6 Sheets-Sheet 6 Filed July 21, 1947 INVENTOR. CHAEL E5 5 EAM,4-

A ORNEY .als.- are secured together stitches, which is. inspaced relationship to the longitudinal edge produce a stitched material in w-hichlthe two. base stitches and,- ,after disposing :the. 'terialsso. thatthe body portions thereof. extend .the extensions of Patented July 12, 1949 UNITED? s-r A-res SEWING MACHINE AND ATTACHMENT THEREFOR Charles Seaman,

lama-ica Estatese Ni Y:

Application-July; 2-1, 1947, Serial No: 762,367

1'3 'Claims. 1: This invention relates tov sewing machines and attachmentsztherefor.

.Thehature and .objeots of the invention will become apparenthereinafter,

In general, and in accordancewith the .prin ciples-of .this invention; ,.two base materials, arranged in superimposed relationship with.v the longitudinaledge of the. lower base material extending beyond the longitudinal edge of the upperbase materiaL-arepassed through the zone of action of a a standard sewing machinewhere said materiwith asinglelineof of the upper base. material, to

materials are superimposed and. the edge portion of .the upper material iextendinglfrom th lineoi stitches is narrower than the edge. portion of the lower material extending from. said line of two base main opposite. directions relative to the row: of stitches, folding the wideredgewportion under andover the narrow edge portion; andfinally ,stitchingthroughthe two ,plies.of. the edge foldand the base material .on ,which itis @disposed.

In =the preferred embodiment, the: two basematerials are passed through individual guides whereby they. are arranged in superimposed relationshipwiththeir longitudinal-edges in alignment-and, prior to the stitchingoperation, the assembly is passed beneath aicutting mechanism which longitudinally severs only the upper base material. After the stitching operation, the stitched material passes beneath a second ,cutting-mechanism which longitudinally, severs .only

the lower base material. Both of. the cutting mechanisms are adjustable,.with-the resultthat the. respective base materials beyond 1 the line .of

. siredfwidths.

.Ea'ch cutting mechanism is preferably a reciprocating knife cooperating with. an adjustable fixed'knife'. A'swill hereafter appear, the first set of knives, which material; is positioned adjacent and preferably in advance of the toe of'the presser foot of a sewing machine; and the second setof knives, which severonly the" lower base material, is positioned adjacent" theheel of "the presserioot;

Both sets of knives, are vertically reciprocated during operation of'the' sewingmachine' through means "driven from= the 'pulley end of the machine.

vertically.- reciprocatingneedle of stitches are made ofthe de-- sever only the upper'base by reference to tliefollowing 20...

Means. are providedto feedlthe upper base materialinto .th'ezone. of. action of" the vertically reciprocating. needle. at @the same speed as the lower. basemateria This means includes a" reciprocating,.pusher.:blade which is adapted'to engageand. advance the upperbasematerialto the presser foot, and the reciprocation "thereof is -effected by, means ,drii .en jfrom the pulley endof the. machine. Means .are also provided to render the blade for ffeefdingjthe. upper base material inoperative whenever this is'desirejd';

The two sets'ofknivesandithe means "for-feeding the upper base material; as 'well' astherespective actuating mechanisms therefor, are

jmounted'on a brack'etto constitute:a sewing'machine attachmentwhich canbe easilyse'cur'ed and'quickly removedffrom a' sewing machine.

The invention willbe more clearly understood detaileddescription when taken 'in" connection with the accompanying drawings; in'which':

Figure l is. a plan vijewiof; thetattac'hment in position on a sewingmachine head; the sewing machine headbeing broken away for clarity;

Flgure'zis'anelevation ofithe needle end of the machineshoWnlWFigureYl; with'thei-headibroken away;

"Figurefiii is a'frontrelevation of the attachment with" part of the machine Jhead and the. driving meansomitte'd;

Figure 4:.is a section takentonthefiine' 4 4! of Figure2;

Figure-6 is anfendiviewofthe pulleyend' of the machine Figure? is 'a 'perspjective view showing the ar- "rangement'fofthe knives relative-tmthe presser foot;

Figure 8 is 'a side elevation or the mechanism for positioning the mcans 'fonfeeding the-upper basematerial;

Figure 91sa section taken on=-the line 9 9 of Figure 8:

Figure 10is' a perspeotive view of the -guides fon'the two'ba'se materials and the first set of knives;

Figure-ll is a pl-an' view oftheguide for' the lower-basematerial Figure 12 is a perspective and exaggerated schematic-viewto' show the sequenceof the-steps attire-operation;

Figure I3 is' a section or the=stitched material after the'first-stitching operation';

Figure 14 4s a section showing-the stitched material after the two base materials have been spread apart so as to extend in opposite directions; and

Figure 15 is a section of the finished seam.

Referring now to the drawings, wherein like reference numerals designate like parts, the reference numeral 2 designates the base of a standard sewing machine head having an overhanging arm 4. On one end (see Figures 2 and 3), the arm 4 is secured to a needle head 6 which carries a needle bar 8 in which a needle I8 is secured in the usual manner. The head 6 also carries a presser foot bar I2 on which there is remova'bly secured a presser foot I4 by means of the screw I6. A manually operated lever I8 is provided to elevate the presser foot bar I2 when desired, as, for example, to provide clearance for inserting or removing the work. The needle bar 8 is driven in the usual manner by a drive shaft 28, which is actuated by a belt pulley 22 on the other end of the arm 4 and driven in the usual manner. The machine is also provided with the usual hand wheel 24. The presser foot I4 cooperates with the usual type of feed dogs 26, which are actuated in the known manner. The feed dogs 26 are positioned in slots in a plate 38 which is also provided with a needle hole 32.

The sewing machine head and appurtenant parts just described are of standard construction and include the usual stitchin mechanism. However, only so much of the sewing machine head has been described as is necessary to an understanding of the present invention.

The attachment is carried by a bracket 48, the upper end of which is secured by a bolt 42 on a boss 44 on the rear of the overhanging arm 4, as shown in Figures 2 and 3. The bracket 48 is provided at its lower end with a journal 46 in which a shaft 48 is rotatably mounted. The shaft 48 is disposed at the back of the machine and is rotatably mounted in a boss 58 carried at one end of a bracket 52 which is secured to the machine head on the pulley side by a bolt 56 (see Figures 4 and 6). The shaft 48 carries a pulley 58 engaging a belt 60 which is driven by a pulley 62 attached to the drive shaft 28. The belt 68 may comprise a standard type of drive belt, such as, for example, a belt having a plurality of cross wires 64 engaging slots 66 in the pulleys 58 and 92 so as to provide a positive drive.

As shown in Figure 3, the bracket 49 is provided with a lateral arm I8 which at the end thereof carries a forwardly, downwardly inclined arm I2. A block 16 is secured to the arm I2 by means of countersunk screws I1. The block 16 is shaped so as to receive a pinion 78. The pinion I8 is adapted to cooperate with a rack 82 disposed in a vertical groove in the block 16. The block I6 is provided with a cover plate "I9 which is secured in position by screws 8 I.

The rack 82 is secured at one end of an arm 84 which extends transversely in the direction toward the needle and presser foot of the machine. The arm 84 is provided with a block 86 in which there is adjustably secured a pin 88 which is secured in a head 89 at the top of a vertically downwardly extending knife support 98. A screw 9| secures the pin 88 in adjusted position in the block 86. A knife 92 is adjustably secured onto the outer side of the knife support 90 by means of a clamping member 93 and screws 94. The head 89 is of a form and shape so that the knife holder 98 will dispose the knife 92 laterally of and adjacent the up-turned toe of the presser foot I4. The toe of the presser foot may be slotted or cut away in order to provide clearance for the knife 92 during the reciprocation thereof, as will hereafter be more fully explained. It is to be noted that the end of the knife support 99 terminates in spaced relationship to the cutting edge of the knife 92.

The knife 92 is adapted to cooperate with a stationary knife 96 whereby any material passing therebetween will be cut. The stationary knife 98 (see Figure 4) is carried at one end of an arm 99 which is adjustably (slidably) mounted in a block I 82 and secured in adjusted position by the screw I84.

In order to prevent the material cut by the knives 92 and 96 from being carried into the zone of action of the needle, a clearer blade I is positioned on the rear face of the knife holder 98 and disposed at right angles to the knife 92. The clearer blade I85 is provided with an ear I86 bent at right angles to said blade and which is secured onto the knife support 98 by means of a screw I81. If desired, a nozzle I I9, appropriately positioned adjacent the knife 92 and connected to a suitable air supply, can also be used to remove severed material.

In order to reduce vibration of the knife 92 to a minimum, one end of a spring I88 is secured to a pin I89 on the knife support 98, and the other end is secured to a pin IIO on the block 16.

A second knife H2 cooperating with a stationary knife II -I, whereby any material passing therebetween will be cut, is adjustably mounted by a clampin plate H5 and screws II6 on a leg I I8 of a second knife support I28. The knife support I28 is adjustably mounted by means of screws I22 and slots I24 on the arm 84. The sec ond knife support and the arm 84 are of such shape so that the second knife II2 will be disposed laterally of and adjacent the heel of the presser foot I 4.

The stationary knife H4 which cooperates with the knife I I2 is carried at one end of an arm I26 which is adjustably (slidably) secured in the block I82 by screws I28.

It is manifest that each of the stationary knives 96 and I I4 can be separately adjusted laterally toward and away from the presser foot and each of such stationary knives can be secured in adjusted position.

For reasons which will become apparent hereinafter, the knives H2 and H4 are positioned so that the cut edge resulting in the material passing therebetween extends beyond the edge of the material passing between the knives 92 and 96.

The block I82 which carries the stationary knives 96 and I I4 is secured by screws I38 to a plate I32 which, in turn, is secured by screws I34 to the block 76.

The knives 92 and H2 are adapted to be reciprocated, relative to their respective stationary knives to effect the cutting operations, by the action of the oscillatory movement of the pinion I8 and the rack 82 cooperating therewith. The drive means for effecting oscillatory movement of the pinion 18 will now be described.

The pinion I8 is oscillated by a pinion shaft I48 secured to one end of a rock lever I42. The other end of the rock lever I42 is secured to a rock shaft I44 carried at one end of an arm I 46. The other end of the arm I 46 is secured, as by a screw 548, to an eccentric I 58 on the shaft 48. Thus, upon rotation of the shaft 48 from the drive end of the machine, the rack 82 will be reciprocated whereby each of the knives 92 and H2 will be reciprocated independently.

-As shown in Figure 11,

l T is fed over a plate 92, the top base material .an arm 28% which,.in

. erating. with the downwardly. The blade 24,8 and 2.50 provided materials are fed through 'the machine and stitched together. fed over a plate -I6il which is-provided with an The plate I60, together with The lower base material L is edge guide I62. the edge guide IE2, is carried on one endof an arm I54 Which is adjustably secured by screws I65 and slots I68 on the base 2 of the machine. the plate I BI] is cut away adjacent its forward end. The topbase material I12 which is provided with an edge guide I14. The plate I12, together-with the edge guide I'M, is carriedon one end of an arm I16 which is adjustably mounted by screws I18 and slots I88 on the plated-64. -As shown inFigure '10, the plate I12 is cutaway at the forward end thereof andbeyond themouthof the edge guide I'M, as indicated by the reference numeral The plate I'I2, together with its edge guide I14, is positioned in th machine so that when the top base material T passes from -the edge guide ti l, it will pass over the (first) stationary knife 96 whereby, upon reciprocation of'the knife T only will be severed. In other words, the fixed knife 96 extends in the cut-out I82 of the plate I12 and the reciprocating knife e2 cooperating therewith is adjusted on its support so as to sever only the top basematerial T. The second stationary'knife I I4 is positioned so that after the two materials have passed through the zone of action of the-needle III, the extension of the lower material will pass over the stationary knife I'I l whereby, upon reciprocation of the knife H2, such material will be cut.

Means are provided in order to feed the base material T to the presser feet at the same rate that the base material L is fed thereto. This is important since if the materials are elastic; such as'knit goods, stretching is avoided and-a smooth fiat seam is obtained. In'the formshown, such means comprises a reciprocating pusher blade I90 provided with a front serrated edge I92 adapted to engage and advance the base-material T over the plate IIZ into the zone of actionof the presser foot. The blade =I9ll is secured at its other end on a bracket I94by a clamping-member I96 and screws I91. The bracket 1-94 iscarried on apin I98 secured by screws v20E! tooneend-of turn, is adjustably secured by screws 2% and slots 20? to an oscillatingarm .203 secured onto a rock shaf-t ZIU. -'The rock .shaft 2H is carried in a journal 2I2;at the forward end of the arm .12 of the bracket and is secured to one end of an arcuate arm ZIG. The

. arcuate arm is providedxwith an arcuate slot 2I8 which is adapted ;to cooperate with -a.pin 22!] carried on one end of a link 222, the opposite end of which is journaled about the eccentricISO. .A wing nut .224 is adapted to secure the pin 220 in adjusted position inthe slot 2 I8.

A spring 23%), having one end 232 thereof coopbracket I94, urges the bracket downwardly whereby the blade I90 is urged I90 is adapted to bedisposed in inoperative position so that it will not engage the top material T. In the form shown, this is accomplished by the means now to be described.

A block 2%, secured vided with a screw 242 (see Figures to the'journal 2J2, is pro- 8 and 9) about which a lever is pivotally mounted. The lever is 244and a finger 246. The finger is adapted to cooperate with stop members on the .block 2M1. Aspringcarried by the block 240 provided with a handle pressed detent 252 her I96. The arm whenthe handlei' l l movement of the pusher 248- or 250 depending on thei directions of .actua- I tion of the handle 244.

'Ihe handle 244 -is formed with azblock z-ZBU in which a red 262 is securedz-by meanszofscrews 264. The rod 282 is bent= as showni in FigureZ, and the leg EBB-thereof is adapted to extend beneath anarm 21!] carried 'bythe clamping mem- 210 *oarries1a :member 212 which is adaptedto ibe engaged by the leg. 268 is moved clockwise in' Figure 2, whereby the-bracket 194' will be moved about the'pin I98 to :elevate the blade-I90. When the lever 244 is operated :in'theother direction, the arm 210 will be released by-theleg ZBB, and the action of the-spring 2-3llon thebracket I94 will move the'latter-about' the pin I98. wherebythe bladewill be urged-into operative-position on the plate IE2.

In operation, a base material T is threaded: over the plate I'IZ-and through "the edge guide 1114, and a second'base'material L is threaded over the plate I66 andthrough the-edge guide 4'62,

' whereby the longitudinal edges of the basematerials T- and Lare in contact with the edges of the edge guides'-'I"I I =:and .='I62 respectively. As

the base material T passes from its edge'guide,

reciprocation of the knife- 92, the longitudinal edge of thebase-material'T only will be cut, as

materials are stitche'd-together-by a single straight line of stitches'S. It is to benotedthat-the base material T is'fed overthe plate I12 by the reciprocating action of the blade I90 into'the zone of action of the presser foot. The reciprocating blade is such that the material T is fed to the zone 0f action of the needle at thesame speed as the material L, whereby a fiat stitched material is obtained. If the action of the blade is too fast, the feed of the material T can be restrained by the operator. After the stitched material leaves the presser foot, the base material L :passes over the stato longitudinally sever and At the end of'this operation,

' the stitched materialis" as shown in Figure 13.

Itis to benotedthatthe-edge portion 280 of material L extends beyondthe edgeportion' 282 extend in opposite of material T. The two materials T and L are then separated and spread apart so that they directions from "the line of stitches S, as-showniin-"Figure 14. The edgeportions 28Utand282" are then 'passed through. a

folder'of a known construction;generally designated by the reference numeral 284, wherein the edge portions 282 andf28l] are bent over the material T and thenthe edge portion 280 turned 282. It is to be forms a two-ply fold and'the' edge portion""282 extends therebetween, with the result that an interlocking,

with the .free edges concealed, is obtained. The

- material is then .fedbeneath a-reciprocatinghee- "shown, the fold dle 285which stitches the two plies of the fold thereof, to the material T by a single .row of stitchesi286. .In the form 282 is not ,stitched-bythe stitches 286. ..However, by. makinglthe. edge portions. 28d

and? 282. ,of...appr0priate..widths, 'the stop; .ply..of the fold 282, d sposed between the plies of the fold 280 can also be secured by the stitches 286. In Figure 12, the folder 284 is part of a presser foot. However, since the details of construction of such folder and presser foot are well known and form no part of this invention, further description thereof is unnecessary.

The seam in the form shown in Figure 15 is fiat and consists of interlocked folds, with the free edges of the materials extending in opposite directions, and two rows of stitches S and 286, the line of stitches 286 passing through both plies of the fold 286i and also through the material T, and the other row of stitches S passing through the material L and only the top ply of the fold $282. If desired, the stitches 286 can also pass through the ply of fold 282 located intermediate the plies of fold 280. In the product, the stitches S and 286 are visible on one side while on the opposite side only the stitches 286 are visible. The seam is strong and rugged and when utilized with knit goods the seam is also elastic and does not crack. Due to the construction of the seam and the manner in which it is produced, it is smooth and flat but not bulky. The invention is particularly useful in the seaming of material in which the edges have a tendency to rave] or are rough.

Since it is obvious that various changes and modifications may be made in the above description without departing from the nature or spirit thereof, this invention is not restricted thereto except as set forth in the appended claims.

I claim:

I. In a sewing machine having a vertically reciprocating needle, feed dogs and a presser foot, means to guide two materials disposed one above the other to said presser foot, a stationary knife adjacent the toe of said presser foot and positioned so that only the longitudinal edge portion of the upper material passes thereover, a reciprocating knife cooperating with said station ary knife, a second stationary knife adjacent the heel of said presser foot and positioned so that only the longitudinal edge portion of the lower material passes thereover, and a second recip-- rocating knife cooperating with said second stationary knife.

2. In a sewing machine having a vertically reciprocating needle, feed dogs and a presser foot, means to guide two materials disposed one above the other to said presser foot, means to feed the upper material at substantially the same speed as the lower material, a stationary knife adjacent the toe of said presser foot and positioned so that only the longitudinal edge portion of the upper material passes thereover, a reciprocating knife cooperating with said stationary knife, a second stationary knife adjacent the heel of said presser foot and positioned so that only the longitudinal edge portion of the lower material passes thereover, and a second reciprocating knife cooperating with said second stationary knife.

3. In a sewing machine having a vertically reciprocating needle, feed dogs and a presser foot, means to guide two materials disposed one above the other to said presser foot, a stationary knife adjacent the toe of said presser foot and positioned so that only the longitudinal edge portion of the upper material passes thereover, a reciprocable knife adapted to cooperate with said stationary knife, means to reciprocate said reciprocable knife, means to actuate said reciprocating means from the pulley end of the machine, a second stationary knife adjacent the heel of said presser foot and positioned so that only the longir from the pulley end of tudinal edge portion of the lower material passes thereover, a second reciprocable knife adapted to cooperate with said second stationary knife, means to reciprocate said second reciprocable knife, and means driven from the pulley end of the machine to actuate the reciprocating means for said second reciprocable knife.

4. In a sewing machine having a vertically reciprocating needle, feed dogs and a presser foot, means to guide the edges of two materials disposed one above the other in their passage to said presser foot, a stationary knife adjacent the toe of said presser foot and positioned so that only the longitudinal edge portion of the upper material passes thereover, a reciprocable knife adapted to cooperate with said stationary knife, a second stationary knife adjacent the heel of said presser foot and positioned so that only the longitudinal edge portion of the lower material passes thereover, a second reciprocable knife adapted to cooperate with said second stationary knife, an arm, means mounting both of said reciprocating knives on said arm, a vertical rack on one end of said arm, a pinion cooperating with said rack, and

,. means actuated from the pulley end of the machine to oscillate said pinion.

5. In a sewing machine having a vertically reciprocating needle, feed dogs and a presser foot, means to guide the edges of two materials disposed one above the other in their passage to said presser foot, the means for guiding the edge of the upper material including a plate over which said material passes, a pusher blade adapted to engage and advance the material on said plate, means to reciprocate said blade, a stationary knife adjacent the toe of said presser foot and positioned so that only the longitudinal edge portion of the upper material passes thereover, a reciprocable knife adapted to cooperate with said stationary knife, a secondary stationary knife adjacent the heel of said presser foot and positioned so that only the longitudinal edge portion of the lower material passes thereover, a second reciprocable knife adapted to cooperate with said second stationary knife, an arm, means mounting both of said reciprocating knives on said arm, a vertical rack on one end of said arm, a pinion cooperating with said rack, and means actuated from the pulley end of the machine to oscillate said pinion.

6. In a sewing machine having a vertically reciprocating needle, feed dogs and a presser foot, means to guide the edges of two materials disposed one above the other in their passage to said if presser foot, the means for guiding the edge of the upper material including a plate over which said material passes, a pusher blade adapted to engage and advance the material on said plate, means to reciprocate said blade, means driven the machine to actuate said blade-reciprocating means, a stationary knife adjacent the toe of said presser foot and positioned so that only the longitudinal edge portion of the upper material passes thereover, a reciprocable knife adapted to cooperate with said stationary knife, a second stationary knife adjacent the heel of said presser foot and positioned so that only the longitudinal edge portion of the lower material passes thereover, a, second reciprocable knife adapted to cooperate with said second stationary knife, an arm, means mounting both of said reciprocating knives on said arm. a vertical rack on one end of said arm, a pinion c0- operating with said rack, and means actuated from;,the pulley end, of- -thie,machine to: oscillate terials disposed one v above the other to said presser foot; said attachment comprising a bracket adaptedstobe securedonlthebackrof said head and carrying a stationary knife adapted to'be disposed adjacent the tce-of-,said presser foot in position to permit only the longitudinal edge portion of the upper material'ato' pass thereover, a reciprocable knife. adapted to cooperate with said stationary'knife,"means to reciprocate said reciprocable knife, means adapted to be driven from the pulley end of the machine to actuate said recip-rocating means, a second, stationary knife adapted to be disposed adjacent the heel of said presserfo'ot "in position to permit only the longitudinal edge portion of the lower material to passl thereover, a, second reciprocable knife adapted to cooperate with said'second stationary knife, means to reciprocate said second reciprocable knife, and means adapted to be driven from the pulley end of the machine to actuate the reciprocating means for said second reciprocable knife.

8. An attachment for a sewing machine having a head, a vertically reciprocating needle, feed dogs, a presser foot and means to guide two matrials disposed one above the other to said presser foot, said attachment comprising a bracket adapted to be secured onto the back of said head and carrying a stationary knife adapted to be disposed adjacent the toe of said presser foot in position to permit only the longitudinal edge portion of the upper material to pass thereover, a reciprocable knife adapted to cooperate with said stationary knife, a second stationary knife adapted to be positioned adjacent the heel of said presser foot in position to permit only the longitudinal edge portion of the lower material to pass thereover, a second reciprocable knife adapted to cooperate with said stationary knife, an arm, means mounting both of said reciprocating knives on said arm, a vertical rack on one end of said arm, a pinion cooperating with said rack, and means adapted to be actuated from the pulley end of the machine to oscillate said pinion. 9. An attachment for a sewing machine having a head, a vertically repicrocating needle, feed dogs, a presser foot and means to guide two materials disposed one above the other to said presser foot, said attachment comprising a bracket adapted to be secured on the back of said head and carrying means adapted to feed the upper material at substantially the same speed as the lower material, a stationary knife adapted to be disposed adjacent the toe of said presser foot in position to permit only the longitudinal edge portion of the upper material to pass thereover, a reciprocable knife adapted to cooperate with said stationary knife, means to reciprocate said reciprocable knife, means adapted to be driven from the pulley end of the machine to actuate said reciprocating means, a second stationary knife adapted to be disposed adjacent the heel of said presser foot in position to permit only the longitudinal edge portion of the lower material to pass thereover, a second reciprocable knife adapted to cooperate with said second stationary knife, means to reciprocate said second reciprocable knife, and means adapted to be driven from the pulley end of the machine to a sewing machine having actuate ,the reciprocating means forsaid second I reciprocable,,knife..

10. -An attachme tfor a sewing machine having a head, a vertically reciprocating needle, feed 5 dogs, a presser -foot,- and means to guide two materials disposed one above the other to said presser foot, said I attachment comprising a bracket adapted to be secured onto the back of said head and carryingimeans adapted to feed the upper, material at substantially the same speed as the, lower material a stationaryknife adapted to be disposedadjacentthe toe of said presser foot in, position to permit only, the longitudinal edge porti'o'n-of the upper material to pass thereover, a reciprocable knife adapted 'to cooperate with said stationary knife, a second stationary knife. adapted,.to,,be..positioned adjacent the heel of, said presser footdnposition to permit onlythe. longitudinaledge-portion of the lower material.- to,.pass, thereover, ,a senond reciprocable knife, adapted to,.cooperat e with said stationary knife, an arm,,- m eans mounting-both of said reciprocat ing knives on said arm, a vertical rack on one end of said arm, a pinion cooperating with said rack, and means adapted to be actuated from the pulley end of the machine to oscillate said pinion.

11. An attachment for a sewing machine having a head, a verticall reciprocating needle, feed dogs, a presser foot and means to guide two materials disposed one above the other to said presser foot, said attachment comprising a bracket adapted to be secured on the back of said head and carrying a reciprocable pusher blade adapted to engage and advance the upper material, means adapted to be actuated from the pulley end of said machine to reciprocate said blade, a stationary knife adapted to be disposed adjacent the toe of said presser foot in position to permit only the longitudinal edge portion of the upper material to pass thereover, a reciprocable knife adapted to cooperate with said stationary knife, means to reciprocate said reciprocable knife, means adapted to be driven from the pulley end of the machine to actuate said reciprocating means, a second stationary knife adapted to be disposed adjacent the heel of said presser foot in position to permit only the longitudinal edge portion of the lower material to pass thereover, a second reciprocable knife adapted to cooperate with said second stationary knife, means to reciprocate said second reciprocable knife, and means adapted to be driven from the pulley end of the machine to actuate the reciprocating means for said second reciprocable knife.

12. An attachment for a sewing machine having a head, a vertically reciprocating needle, feed dogs, a presser foot, and means to guide two materials disposed one above the other to said presser foot, said attachment comprising a bracket adapted to be secured onto the back of said head and carrying a reciprocable pusher blade adapted to engage and advance the upper material, means adapted to be actuated from the pulley end of said machine to reciprocate said blade, a stationary knife adapted to be disposed adjacent the toe of said presser foot in position to permit only the longitudinal edge portion of the upper material to pass thereover, a reciprocable knife adapted to cooperate with said stationary knife, a second stationary knife adapted to be positioned adjacent the heel of said presser foot in position to permit only the longitudinal edge portion of the lower material to pass thereover, a second reciprocable knife adapted to oo- 75 operate with said stationary knife, an arm, means mounting both of said reciprocating knives on said arm, a vertical rack on one end of said arm, a pinion cooperating with said rack, and means adapted to be actuated from the pulley end of the machine to oscillate said pinion.

13. An attachment for a sewing machine having a head, a vertically reciprocating needle, feed dogs, a presser foot and means to guide two materials disposed one above the other to said presser foot, said attachment comprising a bracket adapted to be secured on the back of said head and carrying a stationary knife adapted to be disposed adjacent the toe of said presser foot in position to permit only the longitudinal edge portion of the upper material to pass thereover, a reciprocable knife adapted to cooperate with said stationary knife, means to reciprocate said reciprocable knife, means adapted to be driven from the pulley end of the machine to actuate said reciprocating means, means to prevent the severed material from passing beneath said presser foot, a second stationary knife adapted to be disposed 12 adjacent the heel of said presser foot in position to permit only the longitudinal edge portion of the lower material to pass thereover, a second reciprocable knife adapted to cooperate with said second stationary knife, means to reciprocate said second reciprocable knife, and means adapted to be driven from the pulley end of the machine to actuate the reciprocating means for said second reciprocable knife.

CHARLES SEAMAN.

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

UNITED STATES PATENTS Number Name Date 1,521,626 Hughes Jan. 6, 1925 1,625,781 Bates et al Apr. 26, 1927 1,820,830 Ray Aug. 25, 1931 1,931,103 Capolupo Oct. 17, 1933

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