US2350314A - Feeding mechanism for sewing machines - Google Patents

Description

May 30, 1944. w. KNEISSLER 2,350,314

FEEDING MECHANISM FOR SEWING MACHINES Filed April 29, 1941 2 Sheets-Sheet 1 I *w. LINE OF f FEED 'wmmnnnumulmmmm QWUMI LO b v Walter [fiwissler 2 Sheets-Sheet 2 llllllllllllllll W. KNEISSLER FEEDING MECHANISM FOR SEWING MACHINES Filed April 29, 1941 llllllllliillllll mimnummmnunu l May 30, 1944.

Patented May 30, 1944 FEEDING MECHANISM FOR SEWING moms Walter Kneissler, Roselle, N. J., assignor to The Singer Manufacturing Company, Elizabeth, N. J., a corporation of NewJersey Application April 29, 1941, SerlalNo. 390,866

26 Claims.

This invention is a modification of that forming the subject of the pending application to H.

Hacklander, Serial No. 368,793, filed Dec. 6, 1940, and it relates to improvements in feeding mechanisms for sewing machines of the,type wherein the material being stitched is adapted to be supported and fed through the machine by a pair of feeding wheels or cups.

In practice, it has been found desirable to equip cup-feed sewing machines with an auxiliary work-feeding expedient when the machines are utilized for stitching delicate or flimsy materials such as fine silk, or nylon, hosiery fabrics. The use of an auxiliary work-feeding expedient, in addition to the usual cooperating feed-cups, insures an easy and uniform flow of the fabric through the machine, thereby eliminating puckering of the material during the formation of the seam. The elimination of the puckering results in a seam of high quality in which the individual stitches comprising the seam are of substantially the same length throughout the entire length of the seam.

A cup-feed sewing machine, adapted for hosiery seaming is customarily equipped with an uncurling guide which is positioned directly in advance of the two cooperating feed-cups and which functions to uncurl'themarginal edges of the stocking blank and properly present the same to the feed-cups and stitching devices. An uncurling guide of the type employed is disclosed in the pending application of H. Hacklander, Serial No. 303,947, filed Nov. 13, 1939, which has matured into U. S. Patent No. 2,256,881, dated September 23, 1941.

As clearly set forth in said patent, the uncurling guide is adapted to be swung from normal operative position upwardly into inoperative or loading pos tion, in which latter position the stocking blank may be conveniently introduced into the uncurling guide. After the stocking blank has been properly introduced into the uncurling guide the latter is lowered into operative position and the beginning end of the stocking blank to be seamed is inserted between" the feed-cups which at this time are manually separated by means of a suitable treadle or knee-shift connection.

The above described method of introduction of work into the machine is but one of two methods employed. The second method differs from the first method in that the uncurling guide isnot swung into loading position but is left in lowered operative position. The feed-cups are separated in the usual manner and the stockin blank is vertically introduced between the separated feedcups and into the uncurling guide. In practicing the second method it is necessary that there exists between the two feed-cups an uninterrupted fabric-passageway into which the marginal edges of the stocking blank may be raised so that the beginning end of the stocking blank to be seamed may be properly positioned relative to the stitchforming devices. V

When using the auxiliary feeding expedient disclosed in the pending application of H. Hacklander, Serial No. 368,793, filed Dec. 6, 1940, of which the present invention is a modification, the presser-spring follows the periphery of the outer feed-cup for the full extent of its separating movement. Since the presser-spring remains in contact with the periphery of the outer feed-cup during its separating movement, no uninterrupted fabric-passageway between the feed-cups is provided with the result that difliculty is experienced in introducing the marginal edges of the stocking blank into the machine when following the method in which the uncurling guide is not swung into loading position.

It is therefore the primary objective of the present invention to provide an auxiliary feeding expedient which operates rearwardly of the stitching devices to assist the feed-cups in advancing delicate fabrics through the machine at a uniform rate and without puckering, which auxiliary feeding expedient does not interfere in any way with the introduction of the fabric between the feed-cups and into the uncurling guide.

A further object of the present invention is the provision of an auxiliary feeding expedient in the form of a yielding presser-member in which the effective pressure of the same may be adjusted in accordance with the character of the fabric being sewn.

With the above and other objects in view, as will hereinafter appear, the invention comprises the devices, combinations and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of 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. 7

In the accompanying drawings, Fig. 1 is a fragmentary front elevational view, partly in section, of a cup-feed sewing machine embodying the present invention.

Fig. 2 is a top plan view, partly in section, of the feed-cups, needle and needle-bar, and presserspring, illustrating the position of the presserspring relative to the feed-cups.

Fig. 3 is a rear elevational view of the elements shown in Fig. 1.

Fig. 4 is an enlarged top plan view of the pre ferred form of the auxiliary feeding device with the inner and outer feed-cups in dotted lines.

Fig. 5 is an enlarged bottom plan view of the elements shown in Fig. 4.

Fig. 6 is an enlarged vertical sectional view taken substantially along the line 6-6, Fig. 4.

Fig. 7 is an enlarged vertical sectional view taken substantially along the line I--I, Fig. 4.

' w Fig. 8 is an enlarged verticalsectionai view taken substantially along the line 8-8, F g. ,4.

Fig. 9 is a vertical sectional view taken through the two feed-cups and the body of the presserspring in the plane containing the path of needlereciprocation and with no material between the feed-cups.

Fig. 10 is a fragmentary front elevational 'view of a cup-feed sewing machine fitted with a modifled form of the present invention.

Fig. 11 is a top plan view. partly in section, of the feed-cups. needle and modified form of Presser-spring.

Fig. 12 is an elevational view of the auxiliary feeding device illustrated in Fig. 10 showing the same mounted upon the hub of the inner feedcup.

' Fig. 13 is a bottom perspective view of the modified auxiliary feeding device clearly showing the same as a unit adapted for convenient attachment upon existing cup-feed machines.

Referring in detail to the drawings. the machine in which the invention is incorporated is constructed substantially in accordance with the disclosure in the pending application of H. Hacklander, Serial No. 296,031, filed Sept. 22, 1939, which has matured into U. S. Patent No. dated March 3 1 4 and includes a machine-frame having a standard I which terminates at its upper end into a laterally projecting overhanging bracket 2. Supported by 2. lug.

3 integral with the standard I is an inner feedcup 4 which cooperates with an outer feed-cup 5 depending from a bracket 6 pivotally supported within the laterall projecting overhanging bracket 2, as clearly disclosed in the above noted Patent No. 2,277,970. As is common in machines r of this type, the two feed-cups l and 5 are positively driven in synchronism, and are adapted to support and feed the material W being sewn past the stitch-forming devices.

To augment the feeding action of the two positively driven feed-cups l and 5 on the material there is provided a resser-spring I having a work-engaging section 8 adapted to yieldingly V press the material into contact with the serrated peripheral face of the outer feed-cup 5 rearwardly f the stitching point. The presser-spring I cooperates with the driven feed-cup to effect a pull-feed action on the material, which action supplements the action of the feed-cups in advancing the material through the machine at a uniform rate.

The preferred form of the Dresser-spring I is best shown in Figs. 4 and 5 and comprises a workengaging section 8 terminating at its free end in a. narrowed work-directing finger 9 which extends forwardly substantially in the line of feed between the two feed- cups 4 and 5 through a suitable recess I0 formed in the lower portion of the serrated face of the inner feed-cup, the

free end of the finger 9 being preferabl curved cibly direct the leading end of the material to be sewn between the work-engaging section 8 of the presser-spring and the periphery of the outer feed-cup 5. The other end of the Dresser-spring 1 terminates in a shank II adapted to be adjustably attached by screws I2 to an upstanding flange I3 formed on a slide-block I4. Depending-from the slide-block I4 is a tongue I5 endwise slidably received in a curved slot I6 formed in one end. of a supporting bracket II secured for limited horizontal or vertical adjustment upon the standard I by a screw I9. The tongue I5 of the slide-block I4 is maintained in the slot I6 by a cap-screw I9 threaded into the tongue I5; the head of the cap-screw I8 engaging the bottom surface of the supporting bracket I7. Bearing against the inner end of the slide-block I4 is one end of a. lever 20 pivoted intermediate its ends on a stud 2| threaded into the bracket I1. The other end of the lever 20 is connected by a coil-spring 22 to one end of an arm 23 the other end of which is yoked, as at 24, to embrace the reduced neck-portion 25 of a thumb-nut 2i threaded upon a screw-stud 21 secured in the supportin bracket I'I. It will be observed in Fig,- 5 that the slideblock I4 carrying the presser-spring I is normally yieldingly biased toward a stop-screw 28 provided in the left-hand or outer end of the slot I6 by the coil-spring 22, and that the amount of pressure exerted by the spring is adapted to be adjusted by the thumb-nut 26. Further, it will be seen in Figs. 3 and 4 that the component parts of the support for the presser-spring I are disposed directly beneathand adjacent to the bottom surface of the inner feed-cup-l. When in this position the support for the presser-spring I is at the discharge side. of the feed-cups and does not encroach upon the work-handling space or the space through which the material passes.

During operation of the machine,'the workengaging section 8 of the presser-spring I reacts against the periphery of the outer feed-cup 5 and thereby maintains the end of the tongue I5 spaced slightl from the stop-screw 28. At the beginning of the sewing operation, the outer feed-cup 5 is manually separated from the inner feed-cup 4 in order to facilitate the introduction of the work between the feed-cups. As the outer feedcup moves away from the inner feed-cup 'the presser-spring I tends to follow the same, but only until the tongue I5 on the slide-block I4 engages the stop-screw 28. At this point movement of the presser-spring I ceases and further movement of the outer feed-cup 5 away from the inner feed-cup 4 results in the formation of an uninterrupted fabric-receiving passageway between the feed-cups and the presser-spring. This uninterrupted fabric-receiving passageway permits the ready vertical insertion of the fabric between the feed-cups and into the uncurling guide. It will be seen in Fig. 5 thatthe'slot IS in the supporting bracket I! has a radius of curvature R struck preferably from the axis of rotation of the inner feed-cup 4. This is advantageous since any movement of the presser-spring I caused by the traversing of unequal thicknesses of fabric or by the separation of the feed-cups is about the axis of the inner feed-cup 4, and when so moved the work-directing finger 9 of the presser-spring does not move out of the recess severed end of the thread-chain from snapping back into the path of and fouling the stitchforming devices the supporting bracket H (see Fig. 6) has secured thereto by screw 3| 9. threadend nipper 32. This nipper is positioned so that as the thread-chain is manually introduced into the cutter the same is automatically pulled between the nipper 32 and the face of the flange H, in which position the thread-chain is securely nipped and held.

In Figs. 10 to 13, inclusive, there is disclosed a modification of the improvement. The modiilcation illustrated differs from that hereinabove described in the design of the support for the presser-spring 1. Referring to Fig. 12 it will be observed that the shank H of the presserspring I is secured by two screws I2 to the face of an upstanding flange 33 integral with an arm 34 provided on one section 35 of a two- part frame 35, 35. The two sections of the frame 35, 38 are secured together by two screws 31 and 38, and are apertured, as at 39, to snugly embrace the depending hub 40 formed on the inner feed-cup 4. Formed on the bottom surface of the twopart frame is a flat face 4! (see Fig. 13) which rests upon the upper surface of the lug 3. It will be perceived from the foregoing description that the two-part frame is freely journaled for limited turning movement upon the hub 40 of the inner feed-cup 4 and that the presserspring 1 carried by the two-part frame is maintained at its proper elevation by the face 4| resting upon the upper surface of the lug 3.

Depending from the two- part frame 35, 35 are two ears 42 and 43 arranged to straddle the lug 3. Disposed in the ear 42 is a plunger-pin 44 biased toward the lug 3 by a coil-spring 45 backed by an adjusting screw 45 threaded into the ear 4!. Threaded into the other ear 43 is a stop-screw 41.

It will be understood by reference to Fig. 11 that when the outer feed-cup is in contact with the inner feed-cup 4, the work-engaging section 8 of the presser-spring 1 is in yielding engagement with the periphery of the outer feed-cup 5, and the pressure between the presserspring and the periphery of the outer feed-cup is determined by the coil-spring 45 acting on the plunger-pin 44. The stop-screw 41 is preferably set so that when the presser-spring 1 is in 'contact with the periphery of the outer feedcup 5 or is in position to press the material being sewn against the outer feed-cup; the stopscrew is spaced from the lug 3. During the sewing operation and when traversing unequal thicknesses of material the presser-spring I and the two- part frame 35, 36 carrying the same may turn about the hub 40 of the inner feed-cup 4, or, in other words, about the axis of the inner feedcup, against the action of the plunger-pin 44. when the feed-cups are manually separated to facilitate the introduction of the work the presser-spring 1 turns about the axis of the inner feed-cup, following the outer feed-cup 5 in its movement away from the inner feed-cup 4 until the stop-screw 41 engages the lug 3. When this occurs the presser-spring ceases in its movement while the outer feed-cup continues to move 5 outwardly. The separation of the outer feedcup from the presser-spring produces an uninterrupted fabric-passageway between the feedcups and the presser-spring.

A thread-chain cutter is also provided on this device for severing the thread-chain adjacent to the stitching point. The thread-chain cutter preferably comprises an ear 48 integral with the upper edge of the presser-spring shank II and bent into substantially horizontal position. The

inner edge of the ear is sharpened and forms with the shank H of the presser-spring a threadreceiving notch 49 into which the thread-chain is manually introduced.

It will be understood from the foregoing that an auxiliary feeding device is provided which augments the feeding action of the usual feedcups and, in view of its design, automatically leads the fabric sections being stitched into position for engagement thereby. Moreover, the

26 auxiliary feeding device is constructed so that upon complete separation of the feed-cups for the introduction of the work between the feedcups there is formed an uninterrupted fabricpassageway between the presser-spring and the feed-cups, thereby facilitating the vertical insertion of the work into proper position for stitching.

While I have shown and described two forms of auxiliary feeding expedients for accomplishing the desired result, it is to be understood that other embodiments of the device may be made without departing from the spirit of the invention as set forth in the appended claims.

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

1. In a sewing machine having circularly moving feed-cups provided with cooperating work-engaging faces for supporting and feeding material through the machine, and mechanism for separating said feed-cups to facilitate the introduction and removal of the material therebetween; the improvement which consists in the provis on of means for assisting the feed-cups in advancing the material through the machine. said means including a member adapted to cooperate with the peripheral face of one of said feed-cups, means supporting said member for turning movement about a substantially vertical axis, and means limiting the turning movement of said member about its axis so that the same will be maintained spaced from the peripheral face of its cooperating feed-cup when said feedcups are separated for the introduction or removal of material therebetween.

2. In a sewing machine having circularly moving feed-cups provided with cooperating workengaging faces for supporting and feeding material through the machine, and mechanism for separating said feed-cups to facilitate the introduction and removal of the material therebetween; the improvement which consists in the provision of means for assisting the feed-cups in advancing the material through the machine, said means including a member adapted to yieldingly press the material into contact with the peripheral face of one of said feed-cups, means supporting said member for turning movement substantially about the periphery of the other of said feed-cups, and means limiting the turning movement of said member so that the same will be maintained spaced from the peripheral face of its cooperating feed-cup when said feed-cups are separated for the introduction or removal of material therebetween.

3. In a sewing machine having circularly mov ng feed-cups provided with cooperating worbengaging faces for supporting and feeding material through the machine, and mechanism for separating said feed-cups to facilitate the introduction and removal of the material therebetween; the improvement which consists in the provision of means for assisting the feed-cups in advancing th material through the machine, said means including a member yieldingly biased toward and adapted to cooperate with the peripheral face of one of said feed-cups, means supporting sa d member for turning movement about an axis substantially coinciding with the ax s of rotation of the other of said feed-cups, and means limiting the turning movement of said member about its axis so that the same will be maintained spaced from the peripheral face of its cooperating feed-cup when said feed-cups are separated for the introduction or removal of material therebetween.

4. In a sewing machine having feed-cups provided with cooperating work-engaging faces for suppiting and feeding material through the machine, and mechanism for separating said feed-cups to fac litate the introduction and removal of material therebetween; the improvement which consists in the provision of means f r ass-st ng the feed-cups in advancing the ma ter'al through the machine, said means including a member cooperating with the peripheral face of one of said feed-cups, and meanssupporting said member for cooperation with said peripheral face during the normal stitching operat on but .spaced from said peripheral surface while said feed-cups are separated.

5. In a sewing machine having feed-cups provided with cooperating work-engaging peripheral faces for supporting and feeding material through the machine, and mechanism for separating said feed-cups to facilitate the introduction and removal of material therebetween; the improvement which consists in the provision of means for assisting the feed-cups in advancing the material through the machine, said means including a member adapted to yieldingly press the material into contact with the peripheral face of one of said feed-cups, means supporting said member for cooperation with said peripheral face during the normal stitching operation but spaced from said peripheral face while said feed-cups are separated, and spring means for biasing said member toward the peripheral face of said feed-cup.

6. In a sewing machine having feed-cups pro v ded with cooperating work-engaging peripheral faces for supporting and feeding material through the machine, and mechanism for separating said feed-cups to facilitate the introduction and removal of material therebetween; means for assisting the feed-cups in advancing the material through the machine, said means including a member adapted to yieldingly press the material into contact with the peripheral face of one of said feed-cups, means for supporting said member for movement toward the peripheral face of said feed-cup, spring-means for biasing said member toward the peripheral face of said feed-cup, and stop means for limiting the movement of said member toward said feed-cup so that upon separation of the feedcups there is provided an uninterrupted fabricreceiving passageway between said member and the peripheral face of its cooperating feed-cup.

7. In a sewing machine having feed-cups provided with cooperating work-engaging peripheral faces for supporting and feeding material through the machine, and mechanism for separating said feed-cups to facilitate the introduction and removal of material therebetween; means for assisting the feed-cups in advancing the material through the machine, said means including a member adapted to yieldingly press the material into contact with the peripheral face of one of said feed-cups, means for supporting said member for movement toward the peripheral face of said feed-cup, means including a spring for biasing said member toward the peripheral face of said feed-cup, means for adjusting the pressure exerted by said spring, and stop means for limiting the movement of said member toward said feed-cup so that upon separation of the feed-cups there is provided an uninterrupted fabric receiving passageway between said member and the peripheral face of its cooperating feed-cup.

8. In a sewing machine having feed-cups provided with cooperating work-engaging peripheral faces for supporting and feeding material through the machine, and mechanism for separating said feed-cups to facilitate the introduction and removal of material therebetween; means for assisting the feed-cups in advancing the material through the machine, said means including a member adapted to yieldingly press the material into contact with the peripheral face of one of said feed-cups, means for supporting said member for movement toward the peripheral face of said feed-cup, means including a spring for biasing said member toward the peripheral face of said feed-cup, means for adjusting the pressure exerted by said spring, and an adjustable stop for limiting the movement of said member toward said feed-cup so that upon separation of the feed-cups there is provided an uninterrupted fabric-receiving passageway between said member and the peripheral face of its cooperating feed-cup.

9. In a sewing machine having a pair of circularly moving feed-cups provided with cooperating work-engaging peripheral faces one of which is recessed, and mechanism for separating said feed-cups to facilitate the introduction and removal of material therebetween; means for assisting the feed-cups in advancing the material through the machine, said means including a presser-member having a portion thereof disposed in the recess in one of said feed-cups and another portion thereof extending across the normal line of feed of the material and positioned to yieldingly press the material into contact with the peripheral face of the other of said feed-cups, means movably supporting said presser-member, and means for limiting the movement of said presser-member so that the work-engaging portion will be maintained spaced from the peripheral face of the cooperating feed-cup and that portion of the pressermemher which is disposed in the recess in the other feed-cup will remain therein when the feed-cups are separated for the introduction or removal of material therebetween.

10. In a sewing machine having circularhr moving inner and outer feedcups provided with cooperating work-engaging peripheral faces ofwhich the peripheral face of the inner feed-cup is formed with a recess, and mechanism for separating said feed-cups to-facilitate the introduction and removal of material therebetween; means for assisting the feed-cups in advancing the material through the machine, said means including a presser-member having a portion thereof disposed in said recess and another portion thereof extending across the normal line of feed of the material and positioned to yieldingly press the material into contact with the peripheral face of the outer feed-cup, means supporting said presser-member for movement relative to said inner feed-cup, and means for limiting the movement of said presser-member so that the work-engaging portion will be maintained spaced from the peripheral face of said outer feed-cup and that portion of the pressermember disposed in the recess in the inner feedcup will remain within the same when the feedcups are separated for the introduction or removal of material therebetween.

11. A presser device adapted for attachment upon a sewing machine having apair of circularly movingfeed-cups provided with cooperating work-engaging peripheral faces for supporting and feeding material through the machine, comprising, a supporting bracket, a presser-member carried thereby for movement in a curved path about the periphery of one of said feed-cups, said presser-member having a work-engaging section adapted to yieldingly press the material into contact with the peripheral face of the other of said feed-cups, and means including a spring for biasing said workengaging section toward the cooperating peripheral face of said feed-cup. I

12. A presser device adapted for attachment upon a sewing machine having a pair of circularly moving feed-cups provided with cooperating work-engaging peripheral faces for supporting and feeding material through the machine, comprising, a supporting bracket, a slide-block mounted on said supporting bracket for movement in a curved path, a presser-member secured to said slide-block and having a work-engaging section adapted to yieldingly press the material into contact with the peripheral face of one of said feed-cups, an adjustable stop for limiting movement of the slide-block in one direction, and means including a spring for biasing said slide-block toward said adjustable stop.

13. A presser device adapted for attachment upon a sewing machine having a pair of circularly moving feed-cups provided with cooperating work-engaging peripheral faces for supporting and feeding material through the machine in a substantially vertical plane, comprising, a supporting bracket, a presser-member carried thereby for movement in a curved path about the periphery of one of said feed-cups, said presser-member having a work-engaging section adapted to yieldingly press the material into contact with the peripheral face of the other of said feed-cups, means including a spring for biasing said work-engaging section toward the cooperating peripheral face of said feed-cup, a screw-stud threaded into said supporting bracket, and a thumb-nut threaded thereon and connected to said spring for regulating the pressure exerted by the spring.

14. A presser device adapted for attachment upon a sewing machine having a pair of circularly moving feed-cups provided with cooperating work-engaging peripheral faces for supporting and feeding material through the machine,

comprising, a supporting bracket, a slide-block mounted on said supporting bracket for limited endwise movement, a presser-member secured to said slide-block and having a work-engaging section adapted to yieldingly press the material into contact with the peripheral face of one of said feed-cups, a lever pivoted upon said supporting bracket and engaging said slide-block, a spring at one end connected to said lever, and means connected to the other end of said spring for regulating the pressure exerted thereby.

15. A presser device adapted for attachment upon a sewing machine having a pair of circularly moving feed-cups provided with cooperating work-engaging peripheral faces for supporting and feeding material through the machine, comprising, a supporting bracket having a curved slot formed therein, a slide-block movably mounted on said supporting bracket and having a depending tongue disposed in said slot, a presser-member secured to said slide-block and having a work-engaging section adapted to yieldingly press the material into contact with the peripheral face of one of said feed-cups, means including a spring for biasing said workengaging section toward the cooperating peripheral face of said feed-cup, and means for adjusting the pressure exerted by said spring.

16. In a sewing machine having a pair of feedcups, an auxiliary spring-pressed presser-device movable concentrically of one of said feed-cups into pressure-exerting relation with the other of said feed-cups.

17. In a sewing machine having a pair of cooperating feed-cups, an auxiliary spring-pressed presser-device engageable with work at the discharge side of said feed-cups and movable about an axis at one side of the vertical plane of the line of feed between said feed-cups into pressureexerting relation with the feed-cup at the other side of said plane.

18. In a sewing machine having a pair of feedcups, an auxiliary spring-pressed presser-device cooperating with one of said feed-cups at one side of the vertical plane of the line of feed, and means at the other side of said plane for supporting and determining the path of movement of said presser-device about a definite axis toward and away from said one of said feed-cups.

19. In a sewing machine having a frame supporting inner and outer feed-cups having cooperating peripheral workengaging faces, means adapted to assist the feed-cups in advancing material through the machine, said means comprising a presser-member having a work-engaging section positioned at the discharge side of the feed-cups and disposed to press the material into contact with the peripheral work-engaging face of the outer feed-cup, and means secured to said frame and disposed directly beneath and adjacent to the bottom surface of the inner feed-cup for supporting said presser-member.

20. In a cup-feedsewing machine having a pair of circularly moving feed-cups, means for assisting the feed-cups in advancing material through the machine, said means including a member having a work-engaging section adapted to yieldingly press the material into contact with one of said feed-cups, and means including a frame supporting said member for turning movement about the periphery of one of said feedcups, said frame being pivotally mounted beneath the feed-cup about which the presser member turns.

21. In a cup-feed sewing machine having a pair of circularly moving feed-cups of which at least one is formed with a hub, means for assisting the feed-cups in advancing material through the machine, said means including a member having a work-engaging section adapted to yieldingly press the material into contact with one of said feed-cups, and means including a frame supporting said member for turning movement about the axis of one of said feed-cups, said frame being ioumaled upon the hub of the feed-cup about which the presser-member turns.

22. In a cup-feed sewing machine having a pair of circularly moving feed-cups of which at least one is formed with a hub, means for assisting the feed-cups in advancing material through the machine, said means including a member having a work-engaging section adapted to yieldingly press the material into contact with one of said feed-cups, means including a frame supporting said member for limited turning movement, said frame comprising two parts secured together and apertured to snugly embrace the hub of said feed-cup, and means including a spring for biasing the work-engaging section of said member toward its cooperating feed-cup.

23. In a sewing machine, the combination, with a frame provided with a lug, an inner feedcup overlying and supported by said lug, and an outer feed-cup adapted to cooperate with said inner feed-cup, of means for assisting the feedcups in advancing material through the machine, said means including a member having a workengaging section adapted to yieldingly press the material against the outer feed-cup, a frame supporting said member and mounted beneath said inner feed-cup for limited turning movement about the axis of said inner feed-cup, and a pair of cars provided on said frame and positioned to straddle said lug, one of said ears providing for a stop for limiting turning movement of said frame and the other of said ears providing for a spring adapted to bias the work-engaging section of said member into work-clamping relation with said outer feed-cup.

2'4. A presser device adapted for attachment upon a cup-feed sewing machine having a pair of circularly moving feed-cups provided with cooperating peripheral work-engaging faces for supporting and feeding material through the machine, comprising, a presser-member having a work-engaging section adapted to yieldingly press the material into contact with the peripheral face of one of said feed-cups, a two-part frame carrying said presser-member and adapted to be mounted for limited turning movement about the axis of the other of said feed-cups, and means including a spring for yieldingly biasing the work-engaging section of said presser-member into work-clamping relation with the peripheral face of its cooperating feed-cup.

25. A presser device adapted for attachment upon a cup-feed sewing machine having a pair of circularly moving 1' -cups provided with cooperating peripheral work-engaging faces for supporting and feeding material through the machine, comprising, a presser-member having a work-engaging section adapted to yieldingly urge the material into contact with the peripheral face of one of said feed-cups, a frame carrying said presser-member and adapted to be mounted for limited turning movement about the axis of the other of said feed-cups, a pair of spaced ears projecting from said frame, a stop-screw threaded into one of said ears for limiting the turning movementof said presser-member in one direction, and a spring carried by the other of said ears for biasing the work-engaging section of said presser-member into work-clamping relation with the peripheral face of its cooperating feednipper.

WALTER KNEISSLER.

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