US2741197A - Dual rotary feed - Google Patents

Dual rotary feed Download PDF

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Publication number
US2741197A
US2741197A US469731A US46973154A US2741197A US 2741197 A US2741197 A US 2741197A US 469731 A US469731 A US 469731A US 46973154 A US46973154 A US 46973154A US 2741197 A US2741197 A US 2741197A
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United States
Prior art keywords
feed
needle
wheels
rearwardly
work
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US469731A
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English (en)
Inventor
Winberg Ragnar William
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SEW MATION Inc
SEW-MATION Inc
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SEW MATION Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE542779D priority Critical patent/BE542779A/xx
Application filed by SEW MATION Inc filed Critical SEW MATION Inc
Priority to US469731A priority patent/US2741197A/en
Priority to CH342827D priority patent/CH342827A/de
Priority to DES46350A priority patent/DE1037240B/de
Priority to FR1146586D priority patent/FR1146586A/fr
Application granted granted Critical
Publication of US2741197A publication Critical patent/US2741197A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/10—Work-feeding means with rotary circular feed members

Definitions

  • the present invention relates to improved work-feeding mechanisms for sewing machines, and in particular to powerized rotary feed wheels for a drop feed sewing machine which are operative with the lower feeding mechanisms of said machine for advancing multiple-ply assemblies along a feed path.
  • the well-known drop feed sewing machine most prevalently employed in every day use, includes an oscillating feed dog which cooperates with a presser foot to advance multiple-ply assemblies along a feed or stitched path in relation to a needle. Due to the differential action of the feed dog and the presser foot on the multiple-ply assembly during manual feed, it is necessary for the operator to retard the lower or under layer in relation to the upper or top layer to preclude gathering or bunching of the respective layers of the assembly.
  • the problem of maintaining a desired relationship between the several plies of an assembly becomes more pronounced when one layer of the assembly is of a relatively smooth or slick material and a further layer of the assembly is of a rather coarse or rough material.
  • Feeding mechanisms have been suggested which advance the superposed plies of material past the stitching location at an equal and uniform rate without relative movement of the plies during feed.
  • One such device is a driven feed wheel disposed at one side of and laterally oset from the needle and driveny at a rate dependent upon the drive of a further or lower feed wheel which replaces the standard feed dog of the machine.
  • the feed strokes of the cooperating wheels may be synchronized or unequal to obtain either equal or differential feeding action.
  • powerized feed wheels find application.
  • Such powerized feed wheels eliminate sliding friction, such as incident to use of fixed or stationaryV presserfeet, yet are compatible with the. rather important requirement of maneuverability.
  • the present invention contemplates rotary feed mechanisms for a conventional sewing machine which reconciles the several requirements for widespread application and exhibits among other advantages, extreme maneuverability, and properly coordinated action with the feed dog of the sewing machine to provide positive compound feed of multiple layer assemblies.
  • the feeding and pulling wheels and feed dog are arranged in relation to each other and to the needle to provide a feeding action at locations on both sides of the needle and a pulling action rearwardly of the needle and substantially along a stitched line.
  • a conventional drop feed sewing machine is provided with a modified feed dog and throat plate assembly.
  • the feed dog is formed with active or work-engaging surfaces at opposite sides of and rearwardly of the needle, which workengaging surfaces are effective through a complementary feed slot with a pair of rotary feed wheels disposed above and in operative relation to the feed dog and throat plate assembly.
  • the rotary feed wheels have conical workengaging surfaces and are arranged Von opposite sides of the needle and are toed-in rearwardly of the needle and in the direction of the feed.
  • the conical work-engaging surfaces are effective at both sides of and rearwardly of the needle and cooperate with the feed dog to both feed the assembly in relation to the needle, and pull the assembly away from the needle substantially along the stitched line.
  • such dual rotary feed is accomplished without material modification of the basic design of the sewing machine and may be supported on a sewing machine as a replacement for the conventional presser foot.
  • powerizing of the dual feed wheels is accomplished from the main drive of the sewing machine with.- out material modication of the machine, as is disclosed in the aforesaid copending application.
  • the presence of the dual powerized feeding and pulling wheels is such as not to encroach upon the work-handling space immediately adjacent the needle, permits ready visibility of the work region, and is thoroughly consistent with the requirement of maneuverability.
  • Fig. l is an elevational view of a drop feed sewing niachine including an improved rotary feeder embodying features ofthe present invention
  • Fig. 2 is a plan View of the machine and feeder shown in Fig. l;
  • Fig. 3 is an enlarged sectional view taken substantially along the line 3 3 of Fig. l' and showing details of the dual rotary feeding andv pulling wheels in accordance with the present invention
  • Fig. 4 is an elevational view taken substantially along the line 44 of Fig. 3 and lookingY in the direction of the arrows;
  • Fig. 5 is a sectional view taken substantially along the line 5-5 ofA Fig. Ill and looking in the direction of the arrow;
  • a conventional drop feed sewing Ymachine including a bed 12 from one end of which arises a hollow standard 1d supporting a horizontally-extending arm 16 which terminates in an upright head it overhanging the bed 12.
  • a drive shaft 2t Extending longitudinally within the horizontally extending arm 16 is a drive shaft 2t), shown in phantom in Fig. l, which is connected to an appropriate Vdrive by a belt and pulley coupling 22.
  • a vertically-reciprocable presser foot bar 24 V which is appropriately spring biased and normally supports thereon a presser foot.
  • Y Arranged in side-by-side relation and forwardly of the presser foot bar is a needle bar 26 which supports the usual needle 28, which is movable through a vertical stitch-forming Vstroke during each rotary traverse of the main shaft 2f?.
  • the feed slot 32 includes slot sections 32a, 32b which are disposed symmetrically of and on opposite sides of the needle 2S and extend for a substantial distance on opposite sides of the feed path forwardly of the needle.
  • the slot sections 32a, 32h terminate in a common slot section 32C which extends for a substantial distance rearwardly of the needle from a location im- Operatively disposed in relation to the needle is a feed dog 34 which is periodically extended through the feed slot 32 and is driven in a substantial four-motion path, as indicated by the arrows in Fig. 4.
  • the feed dog 34 includes work-engaging surfaces 36 which are substantially coextensive in area with the feed slot 32 and includes longitudinal sections 36a, 36h which areA arranged to extend at opposite sides of the needle symmetrically of the feed path to the needle, and a trans- 1 verse connecting section 36e rearwardly of the stitching location and merging into the longitudinal sections 36a, 361').
  • the sewing mechanisms may be of any of the well-known structures. Accordingly, further description ofthe sewing mechanisms and equivalent structures will be dispensed with in the interest of simplicity. For Vthe present purposes it will suice to point out that the described arrangement is characteristic of the most commonly used drop-feed sewing machines.
  • a pair of Ypoweri'zed feed wheels 3S, 4b are disposedin operative relation to the feed dog 34 which, conjointly with the feed dog, serve the dual purpose of feeding material in relationV to the needle 28 and pulling material away from the needle 28 during stitching.
  • the powerized feed wheels 38, 40 are of like structure and include frusto-conical workengaging surfaces or peripheral contact faces 38a, 40a
  • the combined feed and pulling wheels 38, 40 are outwardly inclined in relation to each other Yand toed-in toward a location rearwardly of the needle 26 and in the direction of feed.
  • the Y area adjacent to and in front of the needle 2S is in no way obstructed.
  • the needle 26 is readily visible and is readily accessible for replacement, as may be appreciated by inspection of Fig. 6.
  • the combined feeding and pulling wheels 38, 40 are supported for rotation about their respective oblique axes *through provision of a bracket 42 which is mounted on the presser foot bar 24 for movement therewith.
  • the bracket 42 includes a box socket 44 which slips onto a complementary shaped end 24a of the presser foot bar 24 and is attached in place by a threaded screw 46.
  • Projecting forwardly of the socket 44 are a pair of integral ears 43, 5t) which carry oblique stub shafts 52, 54.
  • Appropriate bearings 56, 55 are employed to mount the respective wheels 3S, 4i@ on the stub shafts 52, 54. As seen best in Figs.
  • the mount arrangement for the rotary wheels 33, 40 is such that the point of peripheral contact of the conical work-engaging surfaces 33a, 46a, designated generally by the letter P, is offset rearwardly of the needle 2d. in that the feed wheels 33, 49 are biased downwardly toward the feed dogs 34 tn'ough the action of the spring contained within the head 13 and associated with the presser foot bar, the respective wheels imbed themselves somewhat in the material being fed between the throat plate 3b and the respective work-engaging surfaces 38a, 46a.'
  • the relationship between the point of fperipheral contact and the stitching location is such that for substantial regions on opposite sides of the needle 28 and rearwardly thereof toward and terminating substantially along theY stitched line L, there are effective work-engaging surfaces of both the powerized feeding and pulling wheels 38, 40 and of the feed dog 34.
  • the drive of the wheels 38, 40 in timed relation to or in dependence upon the feed dog 34 encompasses drive in unison, at a faster rate or at a slower rate.
  • the rate of drive between the wheels 38, 40 and the feed dog 34 depends upon the materials being sewn and/or the effects desired. For example, if the wheels 38, 40 are driven at a faster rate, the top ply or layer of a multiple-ply assembly Will be gathered in relation to the bottom ply or layer of the assembly to give the final stitched assembly fullness.
  • Other and varied stitching assemblies may be obtained in accordance vwith practices which are well understood in the art.
  • the adjustable speed drive for the respective feed and pulling wheels 38, 4t) is obtained fromthe sewing machine drive, for example from the main shaftV 2li. Y
  • the drive for the wheels 38, 40 may be obtained without material modilication of the standard sewing machine and by an attachment which is readily associated with the various drop feed sewing machines in present use.
  • a bracket 60 is secured to the machine bed 12 at a location rearwardly of the standard 14.
  • the bracket supports a pivoted arm V62 on which is mounted a pulley Y64.
  • a further pulley 66 Disposed in coplanar relation to the pulleyV 64 is a further pulley 66, the aligned pulleys being coupled together by an appropriate V-belt drive 68.
  • Belt tensioning is obtained by a spring 79 connected between the pivoted arm 62 and the bracket 60 and biasing the pulley 64 away from the pulley 66.
  • the pulley 66 may be cona further penpheral workstructed of two side-by-.side pulley-forming elements having opposed conical belt-engaging faces, which pulleyforrning elements 72, 7.4 may be vadjustable ltoward and away from eachother to eectively vary the pulley diameter. Attachment of the pulley 66 to the main Vdrive shaft 20 of the machine and at the locationsshown best in Fig. 2 requires no change in the machine construction butV merely necessitates the removal of a standard machine component normally found at this location. For further details of the pulley adjustment, referenceshould be made to the aforesaid vearlier filed application.
  • a driving connection is provided 'between the mainshaft 24 of themachine and the feed wheel ⁇ 38 including the belt and pulley coupling 64, 66, 68, the driven shaft 76, the flexible cable 7S, the terminal member .80, the worm 84, and
  • Vthe meshing worm 86 The combined feed and pulling wheel d is vliltewise driven Yfrom the pulley 64 through provision of a flexible cable or coupling S8 ⁇ which Vis driven at one end through a ,gear 'train including gear Sil connected to the input end of the exible cable 83 and meshing gear S2 connected to. the driven shaft 76.
  • the flexible cable 8.8 is coupled to the feed wheel 40 through a terminal member 94 journaled in a sleeve bearing 96 integral with the bracket 42 and carrying la worm 98 meshing with a worm gear 190.
  • the multiple-ply assembly to be stitched is engaged by the powerized, wheels 3d, 4Q, both of which are yieldably urged toward the bottom ffeed dog 34 bythe usual presser foot bar spring.
  • The. downward pressure exerted by theplessure foot bar may bexadjusted in accordance with principles which are well understood, and accordingly the wheels 38 -40 may be regulatedrelativeto'the throat plate 30 Such that the sewing machine may-accommodate different thicknesses of material.
  • the frictional contact between ythe'feeding and pulling wheels V38 and 41B and the material exerts a dragon the respective wheels such that the flexible couplings or cables 78, 88 yofthe respective drives lto the wheels periodically develop a torsional moment in response.
  • the assembly of the rotary of the powerized feeding and pulling wheels 38, 40 may be displaced upwardly Aworking area.
  • the .presence of the respective drives to the wheels does not interfere with up and down adjustment due to the ilexibility kof the coupling cables 7S, Si).
  • the operator correlates the motion imparted mechanisms for the respective powerized wheels with the operation of the feed dog to achieve either synchronous or dilferential feed of the respective layers of the multiple-ply assembly to be stitched.
  • This correlation may be accomplished by merely adjusting the effective diameter of the pulley 66 which serves in the drive connection to both feed wheels 38, 40. lf, for example, the feed rate of the upper ply layer is too slow, the diameter of the pulley 66 is increased by moving the pulley-forming elements 72, 74 closer to each other; in the alternative, if the drive is too fast, the pulley ratio may be increased by decreasing the effective diameter of pulley y66.
  • the described rotary feed attachment is exceptionally useful with binding and folding attachments such as might beemployed with the standard drop feed sewing machine.
  • binding and folding attachments usually create drag on the sewing mechanism and the operator frequently must assist the feeding action, as for example by pulling the work from behind as previously described.
  • the presence of the dual powerized feed wheels precludes resort to this cumbersome expedient or the use of complicated compound feeding machines.
  • top and bottom feeding and pulling wheels avoids distorti'on of bound or folded edges through pulling, twisting or puckering.
  • the present powerized feed attachment may be arranged at opposite sides of a two-needle machine, with the limitation that the needles be spaced to permit the feed wheels to have effective pulling zones rearwardly of the needles and along their respective stitched lines.
  • a sewing machine including a throat plate formed with a feed slot, an oscillating feed dog operatively disposed relative to said feed slot, a needle operatively disposed relative to said throat plate and movable through a vertical stitch-forming stroke, rotary feed means cooperating with said feed dog for advancing the several layers of a multiple-layer assembly to be sewn past said needle,
  • said rotary feed means being operative at both sides of and rearwardly of said needle and including a pair of feed wheels straddling said needle and converging to a location rearwardly of said needle, and a drive operatively connected to said rotary feed means for rotating same in timed relation to oscillation of said feed dog.
  • a sewing machine including aV needle movable through a stitch-forming stroke, and an oscillating feed dog movable in relation to said needle and engageable with the bottom ply of an assembly to be sewn for advancing said assembly along a stitch path, iirst and Visecond feed wheels each having a peripheral surface Yaranged to contact the Vtop ply of said assembly,said first operatively connected to said presser foot bar, a conicallyfaced feed wheel having a work-engaging face journaled on each of said oblique shafts, said feed wheels being in transverse alignment with and on opposite sides of said needle, the work-engaging faces Ybeing of a substantial width for engagement with work passing over said feed bed between said feed dog and said feed wheels, said feed wheels being toed in toward a location rearwardly of said needle Vwhereby the work-engaging faces are effective Vimmediately behind said'needle, and means for rotating said feed wheels at a rate dependent upon the rate of oscillation of said
  • feed dog and Vfeed slot being constructed to provide work-engaging faces at opposite sides of and rearwardly of said needle, a pair of rotary feed wheels disposed at opposite sides of said needle, said rotary feed wheels being constructed and arranged to provide workengaging faces at opposite sides of and rearwardly of said needle, the work-engaging faces of said feed dog and feed wheels being effective conjointly to advance an assembly to be sewn past said needle, and means operatively connectingV said feed wheels and feed dog to said drive for rotation in timed relation to each other.
  • a rotary feed attachment for a sewing machine having a Ymain drive, a needle movable through a stitchforming stroke and operatively connected to said main drive, and an oscillating feed dog movable in timed relation to said needle and operatively connected to saidmain V drive, said feed dog having planar work-engaging surfaces at opposite sides of and rearwardly of said needle, a pair of feed wheels journaled for rotation at opposite sides of said needle and each having a conical work-engaging surface, said feed wheels being outwardly inclined relative to planar work-engaging surfaces of said feed dog rearwardly of said needle, and a drive for rotating said feed wheels f in timed relation to movement of said feed dog.
  • a sewing machine including a needle movable througha stitch-forming stroke, and an oscillating feed dog movable in relation to said needle and engageable with the bottom ply of an assembly to be sewn for advancing said assembly along a stitch path, first and second feeding and pulling wheels eachl having a conical Y peripheral surface arranged to contact the top ply of said assembly, said first and second feeding and pulling wheels being toed-in relative to each other and cooperating with said feed dog at locations laterally offset from said stitch path and a further location rearwardly of said needle and substantailly along said stitch path, and means for periodically imparting movement to said feeding and pulling wheels in timed relation to movement of said feed dog.
  • first and l second 'Y feed wheels each having a peripheralY surface Varranged to contact the top ply of said assembly, said iirst and second feed wheels being disposed in relation to each other and to said feed dog to be effective at locationsV .rotating said feed wheels in timed relation to movement of said feed dog, the means for rotating saidfeed wheels each including anV elongated coupling cable capable of being placed in torsion.
  • a needle movable through a stitch-forming stroke and operatively connected to said drive
  • aY throat plate having a feed slot, and a feed dog operative through said feed slot
  • said feed dog and feed slot being constructed to provide work-engaging faces at opposite sides of and rearwardly of said needle
  • a pair of powerized feed wheels disposed at opposite sidesV of said needle
  • said powerized feed wheels being constructed and arranged to provide work-engaging faces at opposite sides of and rearwardly of said needle, the work-engaging faces of said feed dog and feed wheels being effective conjointly to advance an assembly to be sewn past said needle and to pull said main drive
  • said feed dog having work-engaging surfaces at opposite sides of and rearwardly of said needle, a pair Y of feed wheels journaled for rotation at opposite sides of said needle'and each having a work-engaging surface, said feed wheels being disposed relative to each other wherebyV their work-engaging surfaces cooperate with the wor"- engaging surfaces of. said feed dog at opposite sides of said needle, said feed

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US469731A 1954-11-18 1954-11-18 Dual rotary feed Expired - Lifetime US2741197A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE542779D BE542779A (fr) 1954-11-18
US469731A US2741197A (en) 1954-11-18 1954-11-18 Dual rotary feed
CH342827D CH342827A (de) 1954-11-18 1955-11-09 Nähmaschine
DES46350A DE1037240B (de) 1954-11-18 1955-11-12 Naehmaschine
FR1146586D FR1146586A (fr) 1954-11-18 1955-11-18 Dispositif d'entraînement rotatif jumelé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US469731A US2741197A (en) 1954-11-18 1954-11-18 Dual rotary feed

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US2741197A true US2741197A (en) 1956-04-10

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US469731A Expired - Lifetime US2741197A (en) 1954-11-18 1954-11-18 Dual rotary feed

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US (1) US2741197A (fr)
BE (1) BE542779A (fr)
CH (1) CH342827A (fr)
DE (1) DE1037240B (fr)
FR (1) FR1146586A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891496A (en) * 1956-10-26 1959-06-23 Singer Mfg Co Presser roller attachments
US2955553A (en) * 1956-07-11 1960-10-11 Ragnar W Winberg Rotary feeder
US3003443A (en) * 1958-06-27 1961-10-10 Singer Mfg Co Feeding mechanism for sewing machines
US3083658A (en) * 1960-10-13 1963-04-02 Ragnar W Winberg Drive for rotary feed attachments for sewing machines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1043087B (it) * 1975-10-03 1980-02-20 Rockwell Rimoldi Spa Macchina per cucire per la for mazione di cinture sagomatedi tessuto

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2105097A (en) * 1935-06-12 1938-01-11 Puritan Mfg Company Sewing machine with roller feed
US2317762A (en) * 1940-12-27 1943-04-27 Singer Mfg Co Feeding mechanism for sewing machines

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE428466C (de) * 1926-05-06 Willcox & Gibbs Sewing Machine Vorschubvorrichtung an Naehmaschinen
DE232908C (fr) *
DE892267C (de) * 1941-11-21 1953-10-05 Singer Mfg Co Vorschubeinrichtung fuer Naehmaschinen mit oberen und unteren Vorschubraedern
US2544549A (en) * 1949-12-30 1951-03-06 Union Special Machine Co Top feed and presser means for sewing machines
DE901980C (de) * 1951-06-12 1954-01-18 Singer Mfg Co Vorschubeinrichtung fuer Naehmaschinen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2105097A (en) * 1935-06-12 1938-01-11 Puritan Mfg Company Sewing machine with roller feed
US2317762A (en) * 1940-12-27 1943-04-27 Singer Mfg Co Feeding mechanism for sewing machines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955553A (en) * 1956-07-11 1960-10-11 Ragnar W Winberg Rotary feeder
US2891496A (en) * 1956-10-26 1959-06-23 Singer Mfg Co Presser roller attachments
US3003443A (en) * 1958-06-27 1961-10-10 Singer Mfg Co Feeding mechanism for sewing machines
US3083658A (en) * 1960-10-13 1963-04-02 Ragnar W Winberg Drive for rotary feed attachments for sewing machines

Also Published As

Publication number Publication date
FR1146586A (fr) 1957-11-13
BE542779A (fr)
DE1037240B (de) 1958-08-21
CH342827A (de) 1959-11-30

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