Abstract: A sewing machine accessory with an accessory head which can be quickly and easily attached and removed from a sewing machine. One version of the accessory head can be mounted to a sewing machine foot, while another version can be mounted on a sewing machine shank. Either version can use a protrusion in a mating slot to serve as the mounting connection, configured so that simply inserting the protrusion into the slot is sufficient for attachment, and simply removing the protrusion from the slot is sufficient for detachment. A particular embodiment of the accessory can enable straight seams or hems to be sewn parallel to a material edge without requiring a steady hand or great skill by the operator. An edge guide is provided with a predetermined offset from the sewing machine needle, thus permitting the operator to guide the material through the sewing mechanism in a very straight line, with the resulting seam being a consistently accurate distance from the edge of the material.

Abstract: A thick fabric of poor surface smoothness, such as a fabric for wet suit, can be fed reliably, smoothly and uniformly to perform sewing of excellent finish, without requiring any oil application to the fabric surface before sewing, by arranging a presser foot body, a small presser foot and a roller as follows. The presser foot body is fixedly supported to a lower end portion of a presser bar supported to a sewing arm part so that it is free to move vertically and reciprocally. The small presser foot resiliently pressing the fabric to the upper surface side of a throat plate is disposed on the downstream side than a needle location hole of the presser foot body in the sewing direction. The roller is disposed on the upstream side than the needle location hole in the sewing direction and is rotatable such that its contact portion with the fabric is successively changed with the fabric feed.

Abstract: An apparatus for removing a thread tail from a hole in a presser foot on a quilting machine. The apparatus has an orifice providing a stream of pressurized air that applies a force against a section of the thread tail extending between the needle and the hole in the presser foot. The pressurized air stream pulls the thread tail through the hole in the presser foot and gathers the thread tail on an upper side of the presser foot. In another embodiment, the present invention includes a method of automatically applying a generally transverse force to a portion of the thread tail extending between the needle and the hole in the presser foot for a duration sufficient to remove the thread tail from the hole in the presser foot.

Abstract: A sewing method having a tension thread, guided and set in a passage of a stitch moved laterally relative to stitching devices between a normal position and a releasing position wherein the tension thread is laterally spaced out of the passage.

Abstract: A presser foot for a sewing machine having a base section, a support projecting upwardly from the base section for attachment to a sewing machine, and a fulling rod secured to the base section. The base section has a needle hole and a front face, a rear face, and opposed first and second sides. The lower surface of the base section has first and second surfaces each extending between the front face and rear face of the base section. The first surface is a planar surface extending substantially horizontally from the first side of the base section to a junction with the second surface. The second surface extends generally diagonally upwardly from the junction to the second side of the base section. The fulling rod extends below and spaced apart from the second surface over substantially the full length of the base section.

Abstract: An apparatus for stitching fabric to produce a quilted fabric having a needle plate for supporting the fabric, a presser plate located at a first position above the needle plate and a needle located above the presser plate. A needle rocker shaft is mechanically connected to the needle and imparts a reciprocating motion to the needle in response to the angular displacements of the needle rocker shaft. Further, a presser plate rocker shaft is mechanically connected to the needle rocker shaft and imparts a reciprocating motion to the presser plate in response to the angular displacements of the presser plate rocker shaft. The presser plate rocker has an output shaft movable to a different relative angular positions with respect to an input shaft in order to locate the presser plate at a second position with respect to the needle plate.

Abstract: An endless belt-type walking presser foot is provided, which is capable of preventing slippage of cloth during superimposed seaming. A frame member has a pair of first endless belt guide grooves formed in a bottom surface thereof at locations near lateral side edges of the bottom surface and extending in a longitudinal direction of the presser foot. A pair of roller supports are provided in front and rear portions of the frame member. A plurality of rollers are each journaled to a corresponding one of the roller supports and each have a second endless-belt guide groove in the form of an annulus formed therein. A pair of endless belts each have a train of guide projections formed on an inner peripheral surface thereof and fitted in a corresponding one of the first endless belt guide grooves and a corresponding one of the second endless belt guide grooves, and a train of cloth slippage preventing projections are formed on an outer peripheral surface thereof.

Abstract: A motor-driven sewing machine and method of making the same that includes a needle movable between advanced and retracted positions through a sewing station, a mechanism for controllably advancing the peripheral portion of a work piece past the sewing point and a mechanism for causing the sewing machine to apply stitches to the work piece border as the work piece automatically moves through the sewing station. The sewing machine is provided with a specifically configured feed dog and a presser foot which controllably moves the work piece along a work piece fence surface so that precisely configured stitches are expeditiously formed along the border of the work piece.

Abstract: A pressing member for a sewing machine arranged such that end portions of a pair of materials are sent into a guide path provided between a pair of presser feet extending in front of a needle drop point so that their upper hems are cut even by a lower knife and upper knife, wherein an air introduction pipe is connected to an upper surface of one presser foot, air is ejected towards a side of the other presser foot between an upper guide and lower guide being vertically overlapped rearward of the lower knife and upper knife, and air is sprayed onto one material on the same side so that this material can be securely overlapped onto the other material.

Abstract: An apparatus for protection from a broken needle of a sewing machine has a needle cover within which a needle of the sewing machine moves vertically. A capturing portion is formed at the lower portion of the needle cover for capturing broken pieces of a needle. The needle cover is removably attached to a presser bar of the sewing machine using a support member. Preferably, a magnet is used to enhance the performance of the protecting apparatus.

Abstract: An improvement to a sewing machine which allows ribbons, trim, elastic bands and other linear-shaped materials to be accurately and automatically controlled and guided as they are fed into the sewing mechanism. For elastic, an adjustable control is provided that automatically prestretches the elastic as it feeds into the machine. This control allows the user to adjust the amount of tension in the elastic, and thus control the amount of stretch which is sewn into the finished product. These features are implemented in a hands-free manner, so the operator is not burdened with having to manually guide the materials while simultaneously tending to all the other manual duties that a sewing machine operator must typically contend with. The invention is implemented with one or more guides which can be mounted on the sewing machine foot. Custom feet are provided to allow the invention to be retrofitted onto existing sewing machines.

Abstract: A presser regulating thumb screw device of a sewing machine screwed into an arm ?2! of the sewing machine and including a presser regulating thumb screw ?18!, the pressure regulating thumb screw ?18! being turned clockwise or counter clockwise for regulating to increase or decrease a pressing force by a presser foot ?6!, wherein the presser regulating thumb screw ?18! comprises a screw body ?8! and a fitting member ?9! fitted in the screw body ?8!, the screw body ?8! is bored in a central axis thereof to form a small diameter fitting hole ?8a!, a large diameter receiving hole having a diameter larger than that of the fitting hole ?8a!, and a spot facing part ?8c! extending from the large diameter hole ?8b! having a diameter larger than that of the large diameter hole ?8b!, the small diameter fitting hole ?8a!, the large diameter fitting hole ?8b! and the spot facing part ?8c! are arranged in an ascending order, and wherein the fitting member ?9! is fixed to the spot facing part ?8c! so as not to turn relative

Abstract: An upper needle guide (10) and a lower needle guide (40) for guiding a sewing needle during a stitching operation in order to keep the sewing needle laterally aligned along a stitching path so that the thread loop thrown by the sewing needle beneath the material being sewn is in alignment with the path of movement of a thread loop pick-up device (98). The upper needle guide includes a needle hole having a thread relief passageway (22) therein for providing a relief space for the sewing thread (34) as the needle moves through the needle hole. The lower needle guide includes a thread and needle slot (44) having a pair of V-shaped notches (46) therein. The V-shaped notches are aligned with the stitching path (84). In an alternative embodiment, the lower needle guide can comprise a feed dog (52) having a diamond-shaped needle hole (58) therein.

Abstract: The invention relates to a sewing deviation preventive apparatus of cloth sewn by sewing machine comprising a throat plate forming a needle hole through which a sewing needle penetrates, a feed dog moving in and out on the throat plate, and a cloth presser formed to be located above the needle hole, having a presser foot for pressing the cloth when sewing disposed at the leading end, wherein the abutting portion of the presser foot contacting with the cloth is coupled and supported by an elastic member, whereby the dislocation of the presser foot is allowed by deformation of the elastic member, the cloth can be always gripped stably corresponding flexibly to the thickness of the cloth, and the cloth can be fed stably and securely without causing corrugation, lashing, etc.

Abstract: In a presser foot unit for a sewing machine, a holding member including a presser foot holding knuckle is provided. A presser foot having a pair of knuckles at the back end of the presser foot is also included. The knuckles on the presser foot are spaced apart to receive the presser foot holding knuckle. A presser foot support pin extends through the pair of knuckles on the presser foot and also through a groove in the presser foot holding knuckle, thereby mounting the presser foot to the holding member such that the presser foot can pivot about the support pin. The presser foot holding knuckle also forms curved protrusions that engage the pair of knuckles on the presser foot, such that the presser foot is constrained from moving laterally relative to the holding member. In addition, a spring is supported by the holding member for biasing the presser foot against a piece fabric during operation of the sewing machine.

Abstract: A presser unit for a bar tacking sewing machine comprises four separate clamp feet 15, 16, 17 and 18 which conform in outer appearance to the U-shaped stitches I--I, II--II and III--III to be formed at the tip end of the waist band portions of pants and a pressing mechanism 60 for elastically press each clamp feet 15, 16, 17 and 18 against a workpiece A with a given pressure thereby to elastically press the workpiece A.

Abstract: A multi-needle stitching machine having a presser foot associated with each needle is provided. The presser foot is displaceably supported on a vertically disposed guide bar and downwardly displaceable by the force of a spring. The presser foot is liftable by the needle bar from the stitching material and lowerable onto the latter with an adjustable force during pricking. The presser head of the presser foot leads the needle when pricking the stitching material until the stitching material is firmly clamped on the sewing material table, and remains there until the needle has again exited from the stitching material.

Abstract: The presser foot device of a sewing machine comprises a presser foot 2, a tension mechanism 3 disposed on the presser foot 2 and having a presser member 6 which is adjustably movable back and forth, a guide member 4 provided at a tip end portion of the presser foot 2, wherein a given gap .DELTA. is formed between the presser member 6 of the tension mechanism 3 and the guide member 4, and wherein a belt-shaped rubber member 8 supplied toward a needle penetration point N of the presser foot 2 is passed through the given gap .DELTA., thereby giving a given tension to the belt-shaped rubber member 8. As a result, it is possible to provide a presser foot device of a sewing machine capable of easily, stably and variably setting tension applied to a belt-shaped rubber member, thereby improving the quality of the sewn product and to improve the operability of mounting the belt-shaped rubber member therein by ensuring a large opening space.

Abstract: An apparatus in combination with a sewing machine having a stitch-former that utilizes thread, alternately engageable and disengageable with a garment having portions of different thickness material, and a feeder for feeding the garment through the stitch-former when the stitch-former is disengaged from the garment, comprises a puller roller, a feed rocker shaft, first and second presser feet and first and second pneumatic cylinders. The puller roller is positioned downstream of the feeder for uniformly pulling the garment when the stitch-former is disengaged from the garment. The feed rocker shaft is clampingly-attached to the feeder for driving the puller roller in synchronization with the stitch-former. The feed rocker shaft intermittently engages the puller roller when the stitch-former is disengaged from the garment and intermittently disengages the puller roller when the stitch-former is engaged with the garment.

Abstract: A presser bar 11 is provided at its lower end with a fabric presser foot 13 and a nut 16. The fabric presser foot 13 is individually moved on the presser bar 11 independent of a reciprocating motion of the presser bar 11. Due to an action of a spring 14 the presser foot 13 is resiliently pressed against a fabric 40 to be sewn to reduce a noise while a needle is associated with a hook or shuttle 26.

Abstract: A presser foot for sewing machines including a body portion formed with a recess at a lower end thereof and a threaded hole above the recess, a knob having a cylindrical member having a large diameter at a first end and a small diameter at a second end, the knob being formed with a concaved portion between the ends and an axial through hole with a counter sink at the first end, the knob being rotatably mounted on the body portion by a countersunk bolt which extends through the axial through hole into the threaded hole thereby forming a generally semi-circular cavity, whereby the feeding of a workpiece through the presser foot can be facilitated.

Abstract: A fabric feed mechanism that includes a forward feed roller located forward of the stitch forming area and a rear feed roller located to the rear of the stitch forming area. The drive to the forward and rear feed rollers is synchronized such that the fabric is fed to the stitch forming instruments in a relaxed and unstretched condition. There is a independently applied downward pressure to forward and rear feed rollers and the forward feed roller is raised along with the presser foot. The front feed roller has sections that are located on opposite sides of the presser foot toe to thus ensure that the top layer of fabric is fed under the presser foot rather than riding up the front roller.

Abstract: An arrangement in a sewing machine including a fabric feed dog (14; 44) for feeding a fabric to be sewn, and a vertically movable presser bar (12; 42) having a presser foot (13; 43; 63) and a presser spring (23; 53). The presser bar is actuatable by a power-driven actuator(19; 49) connected to the presser spring and slidable in parallel with the presser bar. The actuator is movable relative to the presser bar to adjust the presser foot pressure and operatively connected to the presser bar to raise and lower the presser foot during the sewing procedure in accordance with a predetermined program. In one embodiment, the presser foot (13, 43) is slidable to follow the fabric during the feeding step. In another embodiment, the presser foot (63) is provided with a top feed ruffler (69, 70) for forming tucks or pleats in the fabric being sewn.

Abstract: A presser foot includes an upstanding bar for attachment to the lifter shaft of a sewing machine. At its lower end are a pair of sole plates having a gap therebetween to accommodate the reciprocating motion of a needle and thread associated with the sewing machine. Attached to one of the sole plates is a curved, L-shaped shield which curves transversely in front of the gap between the upstream edges of the sole plates. The shield serves to deflect material on the upper surface of workpieces away from the gap and thereby prevents the clogging of the gap between the sole plates during the sewing operation.

Abstract: A rotatable presser foot for use in a sewing machine having a sewing station. The rotatable presser foot comprises a foot member and a coupler for detachably and adjustably coupling the foot member to a needle bar in the sewing machine so that the foot member can be rotatably adjusted about a center axis of the needle bar. The coupler comprises a bracket which is adjustably fastened to the needle bar and a foot support on which the foot member can be adjustably secured. The coupler also comprises a resilient coupling located between the foot support and bracket so as to permit the foot member to be resiliently biased towards a sewing surface at the sewing station. The rotatable presser foot can be rotated to any predetermined location about the axis of the needle bar, thereby facilitating sewing workpieces of different shapes and configurations.

Abstract: A removable ruffler for a sewing machine is removably mounted on the sewing machine by way of an exclusive removable holder of the sewing machine. A body of the ruffler for carrying out ruffling of a cloth has a ruffling member, a holder guide rail, and a presser foot guide rail, each extending in a transverse direction. A presser foot is mounted on the presser foot guide rail for sliding movement thereby pressing the cloth downward. A presser foot holder adjusts relative position of the presser foot and the body of the removable ruffler. The presser foot holder has longitudinal position adjustment portion abutting on the presser foot. The longitudinal position adjustment portion has an opening vertically formed therein and having a large longitudinal width. The presser foot holder also has a transverse position adjustment portion fitted on the holder guide rail.

Abstract: A sewing machine having a presser bar with a force transducer mounted thereon for detecting forces applied to the presser bar during high speed sewing and an electromagnetic actuator operatively connected to the presser bar. Circuit means is electrically connected to the force transducer and to the electromagnetic actuator and is adapted to control current to the electromagnetic actuator so as to maintain a constant contact force between the presser foot and a fabric being sewn.

Abstract: A sewing unit with a thread-guiding needle, with a lock stitch hook with a thread reserve, with a fabric holder that can be moved in any direction relative to the needle axis, and with a fabric presser foot with a needle passage opening, which can be placed on the fabric in cycle with the movement of the needle. Loop or twist stitches are formed in an area of the possible directions of movement of the fabric holder. To pull these stitches reliably into the fabric, the needle passage opening is asymmetrically widened beginning from the site of the needle passage, namely, elliptically beginning from a part semi-circularly surrounding the site of the needle passage in one design, and angularly with an arched limiting edge connecting the legs of the angle in another design.

Abstract: A support block is attached to the lower end of a presser foot lifter shaft of a sewing maching to support two separately mounted sole plates of 9 presser foot. One of the sole plates is mechanically retractable by a pneumatic piston and cylinder combination at the option of the operator and this is accomplished by an extension of the piston rod which is mechanically connected to one of the sole plates.

Abstract: A method for manufacturing a sealable cloth pouch having an opening on one side and consisting of two cloth parts to be sewn together uses several piping segments corresponding in number and length essentially to the edges of the cloth pouch which is to be stitched. The seams of the cloth pouch runs substantially linearly along the edges of the pouch into the corners thereof but not around the corners. The piping segments overlap each other in the corner areas to create substantially rounded edges. The apparatus for manufacturing the cloth pouch includes a device to feed the cloth parts together, a device to insert the various piping segments, a device to stitch the piping segments and a device to create an incision to facilitate overlapping the piping segments.

Abstract: A sewing machine comprises a workpiece presser device having a presser foot and a separate chaining-off foot. There is an independent holding down device for each foot which makes it possible to adjust both the presser foot pressure and also the chaining-off foot pressure by variable resilient forces.

Abstract: A presser foot for a sewing machine includes a presser foot with a shank. The end of the presser-foot shank is articulated with a presser-foot sole having a stitching opening for a needle, which is attached to a needle bar. The presser-foot sole is capable of being swung relative to an upper-part of a housing therefor about the axis of the needle. In a preferred embodiment, the presser foot of the invention, which is connected to the sewing machine in a manner so that it is capable of being swung at least 180.degree., makes it possible for the operator of the sewing machine to adjust the presser foot and/or the presser-foot sole so as to make it essentially parallel to the sewing direction and, in this fashion, to allow the sewing-over of thickenings, hemmed borders and the like.

Abstract: A thread chain back-tacker for an overlock sewing machine eliminates defective back-tacking. The back-tacker includes a thread chain cutter, an adjuster for adjusting the length of free thread chain after the end of back-tacking, a presser foot, an air nozzle, a thread drawing nozzle, a thread clamp cylinder, a nozzle swing cylinder, a nozzle pulling cylinder, a cylinder retainer coupling the nozzle swing cylinder and nozzle pulling cylinder together, a position adjuster bolt provided on the cylinder retainer for adjusting a stop position of the thread drawing nozzle, a speed setting/releasing unit, a venturi unit, an air breaking valve, and a solenoid for on-off operating the air breaking valve. The presser foot includes a presser body, a presser foot chain shield secured to the rear end of the presser body, and a presser foot stitch tongue secured to a central portion of the presser body.

Abstract: A puller device of a sewing machine having a stitch-forming mechanism alternately engageable and disengageable with a garment for stitching the garment and a feed mechanism for feeding the garment through the stitch-forming mechanism. The puller device comprises a puller roller downstream of the feed mechanism for uniformly pulling the garment when the stitch-forming mechanism is disengaged from the garment. The puller device also comprises a feed rocker shaft, clampingly-attached to the feed mechanism, for driving the puller roller in synchronization with the stitch-forming mechanism, intermittently engaging the puller roller when the stitch-forming mechanism is disengaged from the garment and intermittently disengaging the puller roller when the stitch-forming mechanism is engaged with the garment. The puller device includes first and second presser feet positioned adjacent the puller roller for urging the garment against the puller roller.

Abstract: A mechanical latch tacking device carried by the toe of the sewing machine presser foot that will allow the operator to produce a relatively short stitch chain at the end of a seam and in a single smooth ergonomical motion cause the chain to be severed and the end of the chain that extends from the needle retained in a location where the next workpiece is started the retained chain will be sewn into the seam.

Abstract: A synchronized, indexed positive material top feeding system for use with sewing and other applications. For example, material being fed to and through the sewing area of a sewing machine, is constantly "gripped" at the top thereof in front of, behind and in the sewing area as well as through an adjustable presser bar. This process takes place without affecting machine speeds, and in feeding movement that is synchronized with the machine feed dog for similar or variable stitch travel. This process is facilitated by a belt with "teeth" that contact and provide frictional engagement of the top of the material.

Abstract: A device for sewing together two plies of cloth with a lap seam. The device comprises a cloth guide that is disposed between a plurality of reciprocating needles and the front of a cutting knife. The guiding portion of the cloth guide extends substantially between the needles and the front edge of the cutting knife. A cloth guide for assuring a full lap of material when sewing a lap seam where the left ply is to be laid on top of the right ply is also provided.

Abstract: An apparatus for sewing a tubular braid with an internal seam and simultaneously filling it with the required filler. A strip of covering fabric is fed to a sewing area from a first direction and folded over so that its lateral edges meet in the sewing area of a sewing machine. Immediately after sewing, the tube is inwardly inverted and pulled toward the direction from which the fabric came, thus being pulled through the folded but unsewn portion of the strip. A core filler material is fed from the opposite direction into the interior of the inverted tube as it is inverted to form the finished braid. The finished braid may then be coiled into a rug shape. Adjacent sections of the braid are then sewn together using dual stitches on the upper and lower surfaces of the rug, to ensure that the surfaces remain flat.

Abstract: The invention provides a method of and a device for reducing pucker between layers of sheet material during a sewing process wherein an upper layer and a lower layer of material are fed to a stitch formation zone by means of a reciprocating lower feed-dog which engages the lower layer of the material and a first presser foot which overlies the feed-dog and urges the layers of material towards the feed-dog; comprises the steps of tensioning the lower layer of material relative to the upper layer of material in the zone which precedes the stitch formation zone.

Abstract: A sewing machine presser foot includes a presser pivotally coupled to the presser foot, a casing secured to the presser foot, a release handle pivotally coupled to the presser foot, a presser pivotally coupled to the presser foot, a spring having one end engaged with the presser in order to depress the presser and the other end engaged in the casing. The casing and the other end of the spring are separated from the release handle such that the users will not be hurt by the spring when the users actuate the release handle.

Abstract: A sewing machine has a tape feeder for laterally aligning pre-positioned tapes of different widths at a presser foot (38) with a presser foot sole (4), the presser foot arranged in such a way that it can move up and down. Several guide elements (15) constructed in the form of lamallae (34) and aligned in the tape feed direction are fitted in the tape in-feed region on the presser foot sole (4). These guide elements (15) guide the tapes laterally.

Abstract: An attachment for a sewing machine includes a lever which is provided with a hole to receive a screw of a needle-bar and is rotatably supported by a lever stand arranged to be shifted upward and downward upon operation of the needle-bar. The lever stand pivotably supports a ratchet wheel and a connector plate at the upper end thereof and has a forked holder at another end thereof. A guide plate is provided with a feed plate therebeneath and is pivotably fastened to the connector plate and shiftably arranged on one side of the lever stand. A ratchet gear feed plate is provided with a ratchet pawl which is engagable with a tooth of the ratchet wheel to be rotated in a predetermined direction. The guide plate is further provided with a projection at one end thereof, the projection being engagable with a pin positioned on one side of the lever stand to stop further shifting of the guide plate.

Abstract: A set of modified plate and needle pressure feet for use in a standard commercial sewing machine. The plate pressure foot features a single inside toe that is narrower and shifted closer to its bar, and therefore to the needle, than in standard machines. The needle pressure foot consists of two separate toes, instead of the normal slotted structure, and is asymmetric with a narrower inside toe that accommodates the shift of the plate pressure foot towards the needle. A raised needle plate insert is also provided with a rounded outside edge, for smoother advancement of the material, and a flat inside edge, for better support of the material against the narrower plate pressure foot. These accessory parts, in combination, allow a user to sew a narrower seam and smaller corners than otherwise possible with conventional equipment.

Abstract: A device for sewing together two plies of cloth with a lap seam. The device comprises a cloth guide that is disposed between a plurality of reciprocating needles and the front of a cutting knife. The guiding portion of the cloth guide extends substantially between the needles and the front edge of the cutting knife. A cloth guide for assuring a full lap of material when sewing a lap seam where the left ply is to be laid on top of the right ply is also provided.

Abstract: In a machine with a longitudinal guide forming, at both sides, two working surfaces, onto which articles are arranged for sewing their upper edges, there is provided a wrinkling device in which two vertical presser feet, inner and outer, are moved vertically in an independent manner and in time relation with the motion of a needle, so that they make wrinkles on an edge of the articles, in alternate position with stitches. The needle, provided with a thread, cooperates with a rotary hook connected with a spool of stitching thread; the needle extends in an arc concentric to a shaft that moves the needle with oscillatory and translatory longitudinal to-and-fro motion.

Abstract: A presser foot having a shoe comprising a pair of mutually facing front portions (5a, 5b) and a pair of rear portions (6a, 6b) in alignment with the front portions (5a, 5b) and connected thereto by a pair of side rocker arms (7a, 7b). The side rocker arms (7a, 7b) are pivotably supported by swinging arms (10a, 10b) linked to a small bearing frame (2). A center rocking arm (15) mounted on the bearing frame (2) acts by a pair of laterally disposed pistons (17a, 17b) on the individual swinging arms (10a, 10b) in order to mutually balance the fulcra of the side rocker arms (7a, 7b). Operating at a longitudinal opening (29) defined between the front portions (5a, 5b) is a fixed knife (32) and a movable knife (33) which are adjustable independently of each other in their vertical positioning relative to the shoe (4).

Abstract: The presser device includes a feeder foot, a holding foot and a link transmission provided between the two feet, the two feet cooperating alternately. The feeder foot has a spur which cooperates temporarily with a mating surface on the cloth feeder. During the feed phase, the spur is obliquely inclined and does not press against the material being sewn, and therefore permits dependable ruffling of an upper layer of sewing material with respect to a lower layer of sewing material. At the start and at the end of the feed phase, the spur is vertically directed and presses against the sewing material, and thus smooth tension-ruffle-free sewing together, particularly of thin material, is made possible.

Abstract: Tufting apparatus for producing textile goods includes a plurality of hollow needles which are reciprocated vertically to penetrate a backing. Yarn is fed pneumatically through the needles and implanted into the backing, the backing being shifted transversely by an amount corresponding to the space between adjacent needles so as to implant a transverse row across the backing. A knife blade is associated with each needle and positioned on the opposite side of the backing from a presser foot. The knife blade engages a point forming flat angled surface of the needle, the angled surface being formed with an upwardly and inwardly extending slot which serves to capture and center yarn exiting the needle and provides a sharp edge which cooperates with the knife blade for cutting the yarn.

Abstract: Sewing machine with an upper feed mechanism is provided with a stroke-adjusting system in which the drive connection between the upper feed foot and the presser foot has a three-position control device for automatic adjustment of the height position of the upper feed system. This is preferably a hydraulic control device, whose hydraulic cylinder is subdivided by its adjusting piston into two chambers. A hydraulic difference measuring unit is provided wherein the two chambers 82a, 82b of the hydraulic cylinder 59 are connected via two antiparallel-connected pressure relief valves 71, 71'. Each pressure relief valve 71, 71' preferably consists of a spring-tensioned check valve R and a pressure-limiting valve D arranged downstream of it.

Abstract: A presser of a sewing machine including a body movable downward for pressing an elastic band to be sewed, a roller rotatably disposed in one end of the body, a member having one end pivotally supported on a middle portion of the body and having a tapered surface formed in the bottom of the other end, a spring and a bolt engaged through the middle portion of the member for biasing the tapered surface downward against the roller, the elastic band being resiliently grasped between the tapered surface and the roller so that the elastic band can be stretched.