Four Motion Feed Patents (Class 112/323)
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Patent number: 11377767Abstract: In feed dog mounting/unmounting mechanism, lever is slidably provided to feed base in the front-rear direction, and is forced backward by a lever force-applying spring. Upon sliding lever rearward, fixing target portion of feed dog 22 is fixedly held by base-side fixing portion of feed base and lever-side fixing portion of lever arranged in the front-rear direction. Stopper is provided to feed base so as to be movable in the upper-lower direction, and holds lever. When feed dog is mounted, stopper is pressed downward by feed dog, which moves stopper so as to allow lever to slide. With this, lever is slid due to force applied by the lever force-applying spring, thereby allowing fixing target portion to be held, interposed between base-side fixing portion and lever-side fixing portion.Type: GrantFiled: May 27, 2021Date of Patent: July 5, 2022Assignee: JANOME SEWING MACHINE CO., LTD.Inventors: Muneyuki Ishikawa, Norihiro Suzuki
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Patent number: 11339515Abstract: Provided is a sewing machine that can be reduced in size by employing a simple configuration for a feed dog drive device. A lateral feed drive unit (8) and a vertical drive unit (9) transmit rotation of a drive shaft (7) to a feed dog (3). The feed dog (3) is supported by a swingable feed base (5). A square piece (18) is provided at a lower end of a raising and lowering link (15) of the vertical drive unit (9). A guide member (19) including a guide groove (20) configured to guide the square piece (18) is disposed right under the feed base (5). An upper end of the raising and lowering link (15) is connected to a part of the feed base (5) between the swinging shaft (6) and the feed dog (3).Type: GrantFiled: June 26, 2019Date of Patent: May 24, 2022Assignee: SUZUKI MANUFACTURING, LTD.Inventors: Tohru Sakuma, Mitsuru Sato
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Patent number: 10802463Abstract: A method of printing a tag and attaching the tag to a bag for printing, severing and feeding non-curled tags to sewing machines. The method of printing a tag and attaching the tag to a bag comprising providing a control unit, a bag conveyor, a bag switch, a printer unit, a chute, a chute sensor, and a feeder assembly; printing and severing a tag in the printer unit; dispensing the tag into the chute to prevent the tag from curling and jamming; and feeding the tag to a sewing machine whereupon the tag is attached to a bag.Type: GrantFiled: January 23, 2018Date of Patent: October 13, 2020Assignee: CMSI TechnologiesInventors: Robert Herfindahl, Matthew Benner, Eric Sorensen, Lamar Sorensen
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Patent number: 9200394Abstract: A guiding structure for a cloth feeding mechanism which is disposed on a base below a needle plate of a sewing machine, a feeding dog driven by the cloth feeding mechanism is mounted on a mounting seat. The guiding structure comprising a first guiding portion formed on the mounting seat and a second guiding portion formed on a guiding device, the first and second guiding portions cooperate with each other to guide the feeding dog to move in the X-axis direction, so that the cloth can be fed precisely along the predetermined path to ensure good sewing quality.Type: GrantFiled: September 18, 2011Date of Patent: December 1, 2015Inventor: Hsien-Chang Tseng
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Patent number: 7380510Abstract: A device for operating several sewing functions is provided with a single control disk with curved paths arranged peripherally and facially on the control disk for acting radially and axially. The control disk is driven by a stepper motor and allows individual or several functions to be executed during the rotary movement as well as temporarily stopping others.Type: GrantFiled: April 5, 2006Date of Patent: June 3, 2008Assignee: Fritz Gegauf Aktiengesellschaft Bernina-NahmaschinenfabrikInventors: André Stucki, Roland Füllemann
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Patent number: 7299757Abstract: A zigzag sewing machine including a needle bar having a sewing needle attached thereto, a needle swing mechanism that laterally swings the needle bar, a needle plate disposed on an upper surface of a sewing machine bed, and a feed dog constituted by a first to fourth teeth that feed a workpiece cloth by projecting/retracting from the needle plate. The zigzag sewing machine further includes a feed dog longitudinal transfer mechanism that longitudinally moves the feed dog, a feed dog lateral transfer mechanism that laterally moves the feed dog, and a control unit that controls the feed dog lateral transfer mechanism so that one of the teeth is associated with a needle drop point of the sewing needle.Type: GrantFiled: June 6, 2006Date of Patent: November 27, 2007Assignee: Brother Kogyo Kabushiki KaishaInventors: Tomoyasu Niizeki, Hiroshi Yamasaki
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Patent number: 6904854Abstract: A transverse longitudinal-cylinder sewing machine includes an automatic thread loosening device, a tension adjustment mechanism, an automatic thread cutting bi-directional solenoid device and a differential fabric driving teeth displacement control device. The differential fabric driving teeth displacement control device consists of a primary transmission mechanism, first and second push mechanisms, a rocking mechanism, first and second adjustment mechanisms that are co-axle, and first and second fabric driving mechanisms located inside a cylinder normal to the co-axle. The axial direction of the cylinder is directed towards the operator so that the axis of the cylinder is normal to the entire transverse work station of the sewing machine.Type: GrantFiled: December 15, 2003Date of Patent: June 14, 2005Assignee: Shing Ray Sewing Machine Co., Ltd.Inventor: Jui-Jung Chuo
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Patent number: 6776109Abstract: A bow and skew reduction control system and method is disclosed. In a tufting machine, an elongate bow roll is positioned intermediate a supply of a backing material to be tufted and a cloth feed roll positioned upstream of a needle bar. The backing material is passed at least partially about the bow roll and is passed over the cloth feed roll and into a tufting zone positioned with respect to the needle bar. The bow roll is provided with an actuator operably coupled to a controller. The roll of backing material is supported at its respective ends by a pair of jack assemblies, the jack assemblies being constructed and arranged for independent operation, and for raising and lowering, respectively, the ends of the roll of backing material as instructed by the controller. At least one, or a plurality, of spaced weft yarn markers are formed or otherwise disposed on the backing material and are parallel with the weft yarns thereof.Type: GrantFiled: December 13, 2001Date of Patent: August 17, 2004Assignee: Columbia Insurance CompanyInventors: Jeffery W. Segars, William N. Vaughan
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Patent number: 6371036Abstract: The invention herein relating to an industrial-use sewing machine structure with transverse tube-shaped needle plate base for making high-speed herringbone stitch mainly consists of a structure of a horizontally oriented and vertically extended transverse tube-shaped fabric feed needle plate base disposed below the needle holder of the sewing machine and, furthermore, a drive mechanism with the drive revolving shuttle and the fabric feed tooth plate situated in the interior section for making variation in the type of stitch along with the style of the pattern cam of the sewing machine main body and for wider applications on sewing the objects being processed in the forms of tube, ring or arc, and is capable of not only increasing the sturdier sewing and attractive appearance of the objects being processed by making the variations of the herringbone stitches, but also enhancing the product quality and added value of the productivity of sewing machines in this category.Type: GrantFiled: April 16, 2001Date of Patent: April 16, 2002Inventor: Tsai-Fa Ho
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Patent number: 6354233Abstract: A sewing or embroidery machine, comprising a needle, a gripper and a workpiece advancing device with at least one driven advancing element. Said advancing device has a linear drive for driving the advancing element. The linear drive has two armatures which can be driven in different directions. A control device with a control circuit for the horizontal movements and a control circuit for the vertical movements of the advancing element is allocated to the advancing device and both control circuits are subordinate to a main control device comprising a data processing device. Said main control device receives synchronization impulses from an encoder according to the current position of the needle or the gripper. The actual values of the horizontal and/or vertical movements of the advancing element can be supplied to the main control device at option.Type: GrantFiled: October 13, 2000Date of Patent: March 12, 2002Assignee: G.M. Pfaff Aktiengesellschaft In InsolvenzInventor: Hartmut Hulshoff
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Patent number: 6082279Abstract: An electrically controlled sewing machine includes a needle bar, a needle plate, a feed dog, a feed dog vertical drive mechanism, a feed dog front/rear drive mechanism, an embroidery drive mechanism, and a feed dog retraction mechanism. The feed dog retraction mechanism includes a switching operation lever. The feed dog vertical drive mechanism includes a normal sewing drive cam and a retraction drive cam, which are switched between using the switching operation lever. The retraction drive cam drives the feed dog to rise upward by about 1 mm when the upper thread is being tightened, that is, at about 40.degree. to 90.degree. phase at the end of the thread tightening operation by the upper thread take-up lever. Because the feed dog moves upward only about 1 mm, it remains retracted below the level of the needle plate and will not interfere with movement of a workpiece cloth mounted in an embroidery frame.Type: GrantFiled: June 1, 1999Date of Patent: July 4, 2000Assignee: Brother Kogyo Kabushiki KaishaInventors: Minoru Ito, Masayoshi Aoyama, Kazuto Oya
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Patent number: 5950552Abstract: In a sewing machine with cylindrical base the transport claws are actuated by a device comprising a kinematic transmission mechanism which, through oscillating auxiliary shafts, is connected to a rotating main shaft housed in the foundation to transmit a vertical oscillatory motion to the claws, as well as a lever transmission mechanism which, through transmission levers pivoting according to vertical axes, is interconnected to an auxiliary transport shaft housed in the foundation to transmit a horizontal reciprocating motion to the claws. A reduction in the size of the base of the sewing machine is thus obtained, without thereby penalizing the structural resilience and the operating reliability of the device for the actuation of the transport claws.Type: GrantFiled: April 13, 1998Date of Patent: September 14, 1999Assignee: Rimoldi NecchiInventor: Franco Rudoni
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Patent number: 5875724Abstract: A fabric feeding device for a sewing machine, including a horizontally and vertically reciprocable feed dog, a feed control cam member with a forward and a reverse feed cam for controlling forward and reverse feed distances of the feed dog, a manually operated feed adjusting member for operating the cam member, a control plate operated by the cam member for changing the angle of a feed regulator for adjusting the fabric feed distances, an auxiliary feed cam member operated by a manually operated buttonhole stitching pattern selector member, an auxiliary feed plate positioned by the auxiliary feed cam member and cooperating with the feed control cam member to move the control plate, a buttonhole reverse feed auxiliary cam member operated by the feed adjusting member, and a buttonhole fine feed adjusting lever rotatably supported by a manually operated buttonhole fine feed adjusting masher and positioned by the buttonhole reverse feed auxiliary cam member for positioning the auxiliary feed plate, wherein a smalType: GrantFiled: December 19, 1997Date of Patent: March 2, 1999Assignee: Brother Kogyo Kabushiki KaishaInventor: Minoru Ito
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Patent number: 5553563Abstract: A sewing machine including a stitch length regulator that adjusting the extent of the horizontal movement of the feed dog. The stitch length regulator is operated by rotation and includes an eccentric that is disposed on a rotating shaft. The eccentric is radially adjustable relative to the rotating shaft by rotating a threaded spindle with a manual tool such as a screw driver.Type: GrantFiled: January 17, 1995Date of Patent: September 10, 1996Assignee: Union Special GmbHInventor: Dieter Schopf
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Patent number: 5477796Abstract: A sewing machine with an arrangement for advancing material for sewing which imparts a lifting and thrust motion to the feed dog. The arrangement for advancing material has a thrust drive which includes a thrust frame that imparts advancing motion of the feed dog. The lifting motion of the feed dog is imparted by a lifting rod that is slidably guided in the thrust frame.Type: GrantFiled: December 9, 1994Date of Patent: December 26, 1995Assignee: Union Special GmbHInventors: Gernot Nedoschinsky, Dieter Schopf, Johannes Strauss
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Patent number: 5337689Abstract: A sewing machine having a device feed dog (21) is disposed in a drive arrangement with a rotating main shaft (5). A lift eccentric (17) provides the feed device with the lift movement by means of an auxiliary carrier (43) and a feed drive (8) provides the feed dog (21) with the feed movement (FIG. 1). The device can alternatively be formed as a differential feed device (FIG. 6).Type: GrantFiled: June 8, 1993Date of Patent: August 16, 1994Assignee: Union Special GmbHInventor: Benno V. Tilders
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Patent number: 5313900Abstract: In a domestic sewing machine a feed dog (35) is adjustable for providing optionally selected stitch length and feeding direction and is adapted to be lowered to a position in which the feeding is inhibited. A control (15) is rotatably connected to a cam disk (16) adapted to adjust the feed dog to a selected position. The cam disk has positions corresponding to lowering of the feed dog as well as reversing the feeding direction, and a zone for controlling the stitch length. The control also has a conical portion (30) which in response to an axial movement of the control is adapted to provide a temporary reversal of the feeding direction.Type: GrantFiled: August 6, 1992Date of Patent: May 24, 1994Assignee: Husqvarna Sewing Machines AktiebolagInventors: Karl I. Rendahl, Borje G. S. Tornqvist
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Patent number: 5299518Abstract: Sewing machine with a lower feed dog, to which adjustable horizontal pushing motions are imparted by a driving cam via a stitch length regulating mechanism and vertical lifting movements are imparted by a driving cam via a lifting shaft. A lifting crank, with the free end of a follower mounted pivotably, can be swiveled out, in one position intended for sewing with a skipping feed into a slot of an oscillating crank mounted freely pivotably on the lifting shaft at a laterally spaced location from the lifting crank. In another position the follower is mounted into a slot of a holder, which is a rigid part of the housing and is arranged at a laterally spaced location from the lifting crank for bordering fabric edges with a band strip, fed in folded in the shape of a U around the fabric edges by a band strip bordering apparatus which participates in the horizontal feed motions of the feed dog.Type: GrantFiled: January 2, 1991Date of Patent: April 5, 1994Assignee: Pfaff Industriemaschinen GmbHInventors: Albert Dusch, Karl-Heinz Walther
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Patent number: 5293829Abstract: A sewing machine including a shuttle/hook & bobbin assembly reciprocated to carry an under thread for making stitches with an upper thread on a workpiece, a stroke-adjustable feed mechanism controlled by a micro-inch stitch adjusting device to feed the workpiece in either direction or to let the workpiece be retained in place during stitching. The major parts of the sewing machine are respectively molded from ABS (acrylonitrile-butadiene-styrene) so that the weight as well as the manufacturing cost of the sewing machine are relatively reduced.Type: GrantFiled: June 24, 1993Date of Patent: March 15, 1994Inventor: Chong-Ming Mu
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Patent number: 5186116Abstract: The device for adjusting the amplitude and direction of the feeding of the material to be sewn includes a movable element (15) provided with a set of teeth (17) for feeding. This movable element includes a slideway formed of two tracks (20a, 20b) in the form of arcs of concentric circles, one of which is generated by a cone and the other by a cylinder, both rolling on the trajectory of a shaft (12) providing a link between two levers of the drive mechanism. The two tracks (20a, 20b) of the slideway are formed by a profiled metal foil, attached to the movable element (15).Type: GrantFiled: November 29, 1991Date of Patent: February 16, 1993Assignee: Mefina S.A.Inventors: Antonio Jimenez, Patrice Deplante
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Patent number: 4958580Abstract: A sewing machine including a laterally extending shaft with a cam contactor thereon being rocked by an eccentric cam assembly secured at a hook drive shaft provides an end face cam at its end such that a sliding shaft with a feed dog assembly thereon and contacting with the end face cam is slid laterally. Thereby, the feed dog is moved laterally, leftwardly or rightwardly, depending on the shifting of the cam contactor. The eccentric cam assembly comprises two eccentric cams configurated opposite in phase and formed such that leftward feed or rightward feed is selectively enabled, and a circular cam which causes no lateral feed. Shifting of the contactor to the selected cam is performed by a solenoid via a linkage system.Type: GrantFiled: January 27, 1989Date of Patent: September 25, 1990Assignee: Juki CorporationInventors: Yutaka Asaba, Masaharu Chikamura
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Patent number: 4809628Abstract: A device to stop lubricant flow in a sewing machine comprising, a housing having a lubrication chamber, and a feed dog carrier having a part projecting out of the lubrication chamber, a feed dog in the area of stitch formation of the sewing machine, and a sliding surface of said part with a step. The device has a sealing element for the feed dog carrier, and a device for driving the feed dog carrier.Type: GrantFiled: July 21, 1987Date of Patent: March 7, 1989Assignee: Union Special, GmbHInventor: Johann O. Kleinschmidt
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Patent number: 4762077Abstract: Modern sewing machines comprise an automatic control of cloth feeding in a form of a guide mechanism or a link mechanism. This invention solves the problem of the several points of play in the guide and link mechanisms by substituting a linear driving motor (12) for these mechanisms, which motor drives the feeder directly in a linear movement without intervening mechanical transmission. The number of parts has been essentially reduced by this solution. The vertical movement of the feeder is brought about by a curve disc (22) driven by the sewing machine motor or by a separate motor for the vertical movement. The longitudinal and the vertical movements are synchronized to the other functions in other units of the sewing machine in an electrical or combined electronical/mechanical way.Type: GrantFiled: March 5, 1987Date of Patent: August 9, 1988Assignee: Husqvarna AktiebolagInventor: Kenneth O. E. Skogward
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Patent number: 4756263Abstract: According to the invention, when a fabric feed device is set to sew a fabric with the straight stitches of smaller feeding amounts (or pitches), a machine operator is not required at first as conventionally to deliberately push the front edge of the fabric forwardly deep between a feed dog and a fabric pressor. The device of the invention is designed to effectively transport and sew the front edge of the fabric at an initial stage of straight stitching of smaller feeding amount. Further according to the invention, an adjustment of smaller feed amount may be effectively carried out in case of button hole stitches and satin stitches.Type: GrantFiled: April 30, 1987Date of Patent: July 12, 1988Assignee: Janome Sewing Machine Co., Ltd.Inventor: Yasuro Sano
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Patent number: 4714040Abstract: A main feed bed of a feeding mechanism of a sewing machine of a swinging lever type is provided with a sub-feed bed which is swingable with respect to said main feed bed and is integrally secured with a feed dog. Both feed beds are connected and controlled by respectively independent vertical feed cams, so that a moving locus of the feed dog is made square while keeping the upper surface of the feed dog parallel with the upper surface of a needle plate.Type: GrantFiled: July 15, 1986Date of Patent: December 22, 1987Assignee: Janome Sewing Machine Co., Ltd.Inventor: Noboru Kasuga
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Patent number: 4633796Abstract: A feed device on a sewing machine having a feeder which is firmly connected with a horizontal shaft which is displaceably mounted in a feed rocker mounted fixed in a housing, and having a drive for the longitudinal axial movement of the shaft. For the reduction and simplification of the drive for the longitudinal movement of the shaft, this drive is arranged directly on the feed rocker. In addition, the horizontal shaft has a gear system with which a gear segment cooperates which together with its drive elements is mounted on a flange firmly connected with the feed rocker. The drive occurs via a step motor which is secured on a flange plate of the feed rocker lever.Type: GrantFiled: August 23, 1985Date of Patent: January 6, 1987Assignee: Pfaff HaushaltmaschinenInventors: Manfred Hoffmann-Glewe, Dieter Prause
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Patent number: 4624202Abstract: A sewing machine which has two substantially independent sets of feed dog teeth comprising a set of main fabric feed dog teeth and secondary or differential feed dog teeth and includes a drive therefore defined by a main drive shaft and a two piece interconnected secondary shaft. Feed dog teeth supporting brackets are mounted between the shafts. A stirrup interconnects the support brackets so that both sets of dog teeth are moved cyclically and in a synchronized manner with one another.Type: GrantFiled: December 12, 1985Date of Patent: November 25, 1986Assignee: Rockwell-Rimoldi S.p.A.Inventors: Adriano Alberti, Mario Valle
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Patent number: 4582008Abstract: In a sewing machine, needle bar and take-up motion is timed to feed dog motion through a constant breadth cam and gear in predetermined angular positions on the arm shaft, a gear on a vertical shaft in mesh with the arm shaft gear according to timing marks on the gears, and a lift cam in a predetermined angular position on the vertical shaft relative to the gear thereon.Type: GrantFiled: April 16, 1985Date of Patent: April 15, 1986Assignee: The Singer CompanyInventors: Walter H. W. Marsh, John Patricia
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Patent number: 4554878Abstract: A presser foot and throat plate construction is disclosed for minimizing work feed drift in a sewing machine having a four-motion drop feed mechanism. By providing aligned and complemental ribs and recesses, one beneath the presser foot and the other in the throat plate, turning movement of the work fabric, which contributes to feed drift, is minimized and stitch forming characteristics of the sewing machine are enhanced.Type: GrantFiled: December 10, 1984Date of Patent: November 26, 1985Assignee: The Singer CompanyInventor: Manfred R. Laidig
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Patent number: 4527498Abstract: A work-feed mechanism for a sewing machine, comprising a two-arm actuating lever pivotably supported on a feed dog or on a member movable with the feed dog, and a lower feed needle supported on one of two arms of the lever and movable through a slot in a throat plate, between its lower and upper positions at which the upper end of the needle is below and above the upper surface of the throat plate, upon pivotal movements of the lever. The lever has, at the other arm, a portion adapted to abut on a portion or member provided on the lower surface of the throat plate upon upward movement of the feed dog. The lever is biased in a direction to cause the needle to move toward its lower position.Type: GrantFiled: March 12, 1984Date of Patent: July 9, 1985Assignee: Brother Kogyo Kabushiki KaishaInventor: Souichi Tazawa
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Patent number: 4513678Abstract: The cloth feeder of a sewing machine is formed of an elongated plate having rows of teeth extending parallel to the direction of feeding movement of the cloth feeder. The cloth feeder and stitcher plate have slot-and-pin guides arranged to guide the feeder for movement in the feeding direction.Type: GrantFiled: June 24, 1983Date of Patent: April 30, 1985Assignee: Husqvarna AktiebolagInventor: Kenneth O. E. Skogward
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Patent number: 4512272Abstract: A feed gear of a sewing machine for reversibly driving a rotary feed dog, as for example, a conveyor belt, a chain or a feed wheel, having a first gear part for producing an oscillating movement, and a second gear part for converting the oscillating movements into reversible intermittent rotary movements. The second gear part is provided with oppositely arranged driven one-way couplings.Type: GrantFiled: March 17, 1983Date of Patent: April 23, 1985Assignee: Kochs Adler AGInventor: Gunter Landwehr
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Patent number: 4512273Abstract: A feeding module in the base on an electronic mechanical sewing machine is driven by an input shaft having two cam surfaces, one of which is arranged to drive a guide element in an oscillating movement. A block journalled on a shaft secured to a slide is displaceable in the guide by a mechanical or computer controlled electrical setting device. The slide is journalled in the feeder and displaceable perpendicularly to the working surface of the feeder. Upon a displacement of the slide the block will move into a corresponding position in the guide thereby effecting an adjustment of the feeding. The other cam surface is arranged to act upon a link connected to the transferring device to the feeder and is coordinated with the cam surfaces to guide the feeder in rectangular movements.Type: GrantFiled: June 24, 1983Date of Patent: April 23, 1985Assignee: Husqvarna AktiebolagInventor: Kenneth O. E. Skogward
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Patent number: 4487143Abstract: An improved self-oiling system for the drive shaft and feed dog assembly of a portable, bag-closing sewing machine utilizes a drive shaft having an internal axial oil channel, an upper radial oil bore which extends from the oil channel to the outer periphery of the shaft to confront the lower main drive shaft bearing, and a lower radial oil passage which extends between the oil channel and the outer periphery of a feed dog eccentric cam which is integral with the lower end of the drive shaft. Oil is supplied to the lower main drive shaft bearing for further downward distribution along the bore, channel and passage to the outer periphery of the feed dog cam which is rotatably received in the feed dog block. An oil passage within the feed dog block delivers oil from the feed dog cam radial oil passage to a slide bearing within the block to lubricate the interface between a guide post and the slide bearing. Annular recesses are provided on the shaft and post to further enhance transfer of oil within the machine.Type: GrantFiled: May 25, 1983Date of Patent: December 11, 1984Assignee: Axia IncorporatedInventor: Andrew J. Hiltner
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Patent number: 4469039Abstract: A work feed device for sewing machines, which comprises feed dog carrier bars performing an elliptical movement with the aid of two mechanisms; namely, an advancing mechanism and a raising mechanism. The advancing mechanism is composed of an oscillating shaft provided with arms, which in turn are connected to the feed dog support bars at the opposite end to that where the dogs are mounted. The raising mechanism comprises a support making a vertical reciprocating movement and which is provided with a horizontal guide along which the feed dog support bars are moved reciprocatingly by the advancing mechanism. Finally, vertical movement of the support comprises two connecting rods approximately parallel to one another. They are pivoted at one end to the said support and at the other end to a part connected to the frame of the sewing machine.Type: GrantFiled: September 30, 1983Date of Patent: September 4, 1984Assignee: Rockwell-Rimoldi S.p.A.Inventor: Franco Marchesi
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Patent number: 4434735Abstract: A sewing machine is described comprising a mechanism arranged to convert movement signals generated by a decoder unit into movements of a feed dog for the fabric with the main characteristic of the machine being that said mechanism comprises a plurality of levers; a selector unit which is controlled by the decoder unit and selects one of said levers, to place this latter in a working position; a member angularly coupled to a control shaft for the dog and angularly positionable in a predetermined angular position by the selected lever; and a dragging element controlled by said decoder unit and arranged to move the member from its predetermined angular position towards an angular reference position.Type: GrantFiled: November 12, 1981Date of Patent: March 6, 1984Assignee: Vigorelli Genova S.p.A.Inventor: Nicolo Giolitti
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Patent number: 4428316Abstract: A compact sewing machine feed system utilizing sheet metal parts to reduce inertia, and separate feed and lift cams to simplify replacement for the purpose of optimizing feed characteristics.Type: GrantFiled: July 14, 1982Date of Patent: January 31, 1984Assignee: The Singer CompanyInventors: John Patricia, Jan Szostak
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Patent number: 4425860Abstract: In a sewing machine a workpiece feeding device having a lower feeding member intermittently and reversably driven and an upper feeding member in a steady contact with the workpiece and drivingly connected to the lower feeding member by means of connecting elements including one-way coupling means and a device arranged between the latter and the upper feeding member for interrupting or reversing the upper feed motion simultaneously when reversing the lower feeding member; different embodiments are described.Type: GrantFiled: October 1, 1980Date of Patent: January 17, 1984Assignee: Kochs Adler AGInventors: Gunter Landwehr, Horst Thiele
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Patent number: 4419951Abstract: A feeder device for a sewing machine containing a stitch plate and provided with a material feeder which reaches through the stitch plate from below, and which is driven by a lift- and thrust rocker along a path made up of four phases. The feeder device further includes a support member and an intermediate rocker. The support member of the material feeder is arranged on the intermediate rocker, which in turn is rotatingly attached to the thrust rocker whereby the horizontal rotational axis of the support member is arranged on the intermediate rocker at a distance from the rotational axis of the intermediate rocker and substantially parallel thereto.Type: GrantFiled: November 18, 1980Date of Patent: December 13, 1983Assignee: Fritz Gegauf Aktiengesellschaft Bernina-NahmaschinenfabrikInventors: Urs Ruch, Ernst Dreier
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Patent number: 4411211Abstract: A method of and a sewing machine for affixing a continuous chain of coupling members for a slide fastener to a flexible support, e.g. a garment or a tape to be applied to a garment, utilizes a fabric fed by a mechanism below the worktable and a presser foot with a feeder above the worktable which advances the coupling chain in a composite movement including up-and-down and back-and-forth components. According to the invention, at least one of the drives is adjustable so that the increment of the displacement of the respective member (fabric or coupling chain) can be varied to ensure that the two members are stitched together free from undulations or corrugations after the stitching operation or any subsequent treatment to which the product may be subjected.Type: GrantFiled: October 22, 1981Date of Patent: October 25, 1983Assignee: Optilon W. Erich Heilmann GmbHInventor: Halmut Heimberger
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Patent number: 4399761Abstract: A lockstitch sewing machine is provided with an elongate resilient member which is affixed at one end in the machine and extends under the feed dog of the machine for engagement thereby. The resilient member is flexed by the feed dog during downward movement thereof and then acts against bobbin thread pulling it from the bobbin spool. The elongate member relaxes and separates from the bobbin thread during upward movement of the feed dog.Type: GrantFiled: July 13, 1981Date of Patent: August 23, 1983Assignee: The Singer CompanyInventors: Gerald J. Creed, Thaddeus J. Zylbert
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Patent number: 4391216Abstract: This disclosure relates to a four motion feed mechanism for sewing machines that is adapted to advance a workpiece past the stitch forming point of the machine. Orbital movement is imparted to the feed dog by a drive mechanism including first and second linkage assemblies driven off a common eccentric arranged on the sewing machine bed shaft. A feed regulating assembly including a single feed regulator control knob is operatively associated with one of the linkage assemblies to selectively pre-set the stitch length of the machine.Type: GrantFiled: November 6, 1980Date of Patent: July 5, 1983Assignee: Union Special CorporationInventor: James C. Hsiao
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Patent number: 4365569Abstract: A feed regulator clamp in the shape of a bell crank having the pivot rod thereof retained in a slot in a sewing machine bed by a flat spring which also may serve to urge the clamp into clamping engagement with a feed regulator. A first arm of the bell crank comprising the clamp is for engagement with the feed regulator and a second arm of the bell crank is for engagement with a cam controlling the engagement of the first arm with the feed regulator. The flat spring which retains the clamp to the sewing machine bed urges the first arm into engagement with the feed regulator whenever permitted by the cam which is circular in cross-section except for a flat spot which, when aligned with the second arm, will permit the first arm to come into clamping engagement with the feed regulator.Type: GrantFiled: October 6, 1980Date of Patent: December 28, 1982Assignee: The Singer CompanyInventor: Kenneth D. Adams
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Patent number: 4364317Abstract: A machine for sewing together two workpiece parts having edges of equal or unequal length by using a bead seam, especially for joining together the edge of a vamp and the shorter edge of a plug of a true moccasin shoe, so that the length of the plug matches that of the longer edge of the vamp, in only one operation. The bead seam forming device essentially consists of an auxiliary folding and ruffling finger acting in front of the needle of the sewing machine and in synchronous driving connection with the needle; several machines are described which are provided with different bead seam forming devices.Type: GrantFiled: June 23, 1980Date of Patent: December 21, 1982Assignee: Kochs Adler AGInventors: Gerhard Schneider, Rolf Ludwig, Jochen Fischer
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Patent number: 4295434Abstract: This disclosure relates to a four motion feed mechanism for sewing machines that is adapted to advance a work piece past the stitch forming point of the machine. Orbital movement is imparted to the feed dog by a drive mechanism including first and second linkage assemblies driven off a common eccentric arranged on the sewing machine bed shaft. A feed lift regulatory assembly is operatively connected to one of the linkage assemblies and is provided to selectively modify the amplitude of lift that is imparted to the feed dog of the machine.Type: GrantFiled: October 24, 1979Date of Patent: October 20, 1981Assignee: Union Special CorporationInventor: James C. Hsiao
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Patent number: 4285294Abstract: An upper layer feed mechanism in a sewing machine is disclosed herein. The upper layer feed mechanism comprises a first interlocking arm secured at one end to a horizontal feed shaft, an upper layer feed shaft rotatably supported on the machine frame of a sewing machine and having a second interlocking arm, a connector rod connecting between the first and second interlocking arms, an adjusting mechanism adjusting the connection between the second interlocking arm and connector rod, a support arm rotatably supported at one end on the machine frame, an upper layer feed arm rotatably supported at one end on the support arm and having an upper layer feed dog at the other end, a connection mechanism transmitting the rocking movement of the upper feed shaft to the support arm, a resilient means normally urging the upper layer feed dog downwardly and a means urging the upper layer feed dog upwardly against the resiliency of the resilient means.Type: GrantFiled: June 26, 1980Date of Patent: August 25, 1981Assignee: Tokyo Juki Kogyo Kabushiki KaishaInventor: Kikuo Aida
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Patent number: 4235180Abstract: A sewing machine work feed mechanism with guide means for tilt free motion of the feed dog in a linear path, the feed mechanism utilizing a fabricated sheet metal feed bar, centrally pivoted, and of a length from the pivot to one end of at least 10 times the maximum feed stroke.Type: GrantFiled: February 19, 1980Date of Patent: November 25, 1980Assignee: The Singer CompanyInventor: William Weisz
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Patent number: 4215639Abstract: A lock stitch sewing machine is provided with mechanism controllable by a servo motor for pulling thread from a bobbin, and including a selectively positionable member operably connected with a feed dog and bobbin thread engageable means for causing thread to be pulled from the bobbin by the thread engageable means during downward motion of the feed dog in amounts determined by the position of the selectively positionable member.Type: GrantFiled: February 2, 1979Date of Patent: August 5, 1980Assignee: The Singer CompanyInventor: Ralph E. Johnson
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Patent number: 4199995Abstract: A cylindrical cam is obliquely mounted on a drive shaft to be shiftable in the axial direction. The cam and the drive shaft are concentric at the axial center and the eccentricity of the cam increases gradually towards the opposite ends and in opposite phases. A pair of contact members carried by a follower member engage the opposite sides of the cam. As the drive shaft is rotated a reciprocating motion is imparted to the follower member and by shifting the cam in the axial direction the amplitude of the reciprocating motion can be varied.Type: GrantFiled: December 16, 1977Date of Patent: April 29, 1980Assignee: Wataru ShimokawaInventor: Saburo Murakami
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Patent number: 4194456Abstract: An improved mechanism for producing blind stitches with a household sewing machine, including a removable throat plate having a thread deflecting member reciprocatorily driven into engagement with a loop of thread carried by the loop taker to insure engagement of the loop of thread by a hook needle. The thread deflecting member is driven in timed relation to the rising and falling motion of the feed dog by a cam which is fastened to the feed drive shaft.Type: GrantFiled: March 15, 1979Date of Patent: March 25, 1980Assignee: The Singer CompanyInventors: William J. Edwards, Herbert T. Hurler