Abstract: Provided is a sewing machine capable of positioning feed dogs with a sufficient distance below the upper surface of a throat plate when the feed dogs are retracted. Feed dogs 3 protrude and retract from a throat plate 1. A horizontal feed drive unit 8 converts the rotation of a drive shaft 7 into a reciprocating motion in the horizontal direction and transmits the horizontal reciprocating motion to the feed dogs 3. A vertical drive unit 9 converts the rotation of the drive shaft 7 into a reciprocating motion in the vertical direction and transmits the vertical reciprocating motion to the feed dogs 3. A vertical position changing part moves turn-back points P at both ends of a forward path and a return path when the feed dogs 3 reciprocate in the horizontal direction below the throat plate 1.

Abstract: A sewing machine is provided, which has lower feed teeth which feed a sewing object by a lower feed drive mechanism having a lower drive shaft 92 as a drive source and upper feed teeth which are driven by an upper feed shaft that is coupled to and driven by the lower feed drive mechanism. The sewing machine is provided with an upper feed lower shaft 1 which is supported rotatably on a machine main body and is coupled to the lower feed drive mechanism, an upper feed coupling section which transmits movement of the upper feed lower shaft to the upper feed shaft, and a transmission control section which controls halting and restarting of transmission of movement of the upper feed lower shaft. The upper feed coupling section is held at a movement transmission halt position by operation of the transmission control section.

Abstract: An alloy semiconductor can be grown using a container including a lower section containing a composition-control source material and an upper section containing a solid. The composition-control source material is heated to produce a vapor, and the solid charge is melted to form a melt with a melt meniscus extending to an inner surface of the container. The vaporized composition-control source material flows from the lower section to the upper and contacts the melt meniscus. The melt is then cooled to form a crystal.

Abstract: A top feeder arrangement for a sewing machine provided with a processor for controlling stitches sewn on a cloth, wherein the sewing machine has a sewing machine head which comprises a needle mechanism with a needle bar (1) provided with a needle (2), a presser bar (3) provided with a presser foot (4) and a top feeder arm (10) provided at its lower end with a top feeder (11) acting from an upper surface of a cloth for feeding the cloth in the sewing direction and wherein the sewing machine is provided with a mechanism (12, 15, 17, 18) providing a controllable pressure of the top feeder (11) against the cloth.

Abstract: An apparatus for temporarily storing products at the exit of a quilting machine comprising an inclined guiding element along which at least one carriage, provided with an element for gripping the product manufactured by the quilting machine, can slide by gravity, a first and a second stop elements for the carriage being arranged along the guiding element, and actuation elements, which act on the grip element to release the removed product, being associated with the stop elements. The carriage released by the second stop element is transferred onto a vertical lifting unit, which is provided with retention and release elements for retaining the carriage at the lower stroke limit and releasing it at the upper stroke limit to insert the carriage on the guiding element.

Abstract: A binding conveyor system for applying binding to a fabric piece. The apparatus includes an unique binding fixture for holding the fabric piece. The fixture includes: a base; a support attached to the base; and fabric engaging device mounted on the support for engaging, positioning and securing the fabric piece. A conveyor transports the binding fixture to at least one work station for operating on the fabric piece while the same is being held by the binding fixture. A transfer station places the fabric piece on the binding fixture.

Abstract: A feed mechanism for a buttonhole sewing machine has a movable plate with a clamped piece of cloth. A rack is formed on a rearward extension of the plate. A pinion engages the rack, and a large gear is fixed to the pinion. An upper driving gear drives the large gear and is fixed to a vertical stub shaft which extends through the base of the sewing machine. A lower driving gear is mounted on the lower end of the vertical stub shaft beneath the work-supporting surface. A longitudinally shiftable horizontal shaft is mounted beneath the vertical stub shaft. A left bevel gear and a right bevel gear are keyed to the shiftable shaft. The shaft may be shifted so that either one or the other bevel gear engages the gear on the vertical stub shaft, or to an intermediate position in which the bevel gears are disengaged. The horizontal shaft is driven by a ratchet mechanism.

Abstract: A folding stamp for folding sewing parts which are to be attached to a main sewing part, in a sewing system for making pockets in articles of clothing. The additional sewing parts, such as flaps or pocket-bag blanks, can be fed manually. This folding stamp has a fastening unit arranged on an upwardly and rearwardly extending extension formed on a vertical web. The fastening unit thereby extends above a resting surface on top of the web and in the direction toward the rear end of the folding stamp. The folding stamp is thereby arcuate or C-shaped in longitudinal cross-section, which gives it a compact construction and gives the operator an unimpeded view of the region in which he must feed the additional sewing parts.

Abstract: The instant invention concerns an industrial sewing machine of the type comprising a double clamp for gripping and transporting the patch and the fabric on the work surface, this clamp being applied to the front of a trolley, connected both to the first slide of a cross shaped table, activated by a motor by means of a toothed belt, and to the rack rod of a rack and pinion, activated by a motor; this sewing machine is characterised by the fact that the aforementioned cross shaped table is positioned above the trolley and fixed below a support plate, the support plate being below the projecting arm of the sewing machine.

Abstract: Apparatus is provided for sewing the crotch portion of a pair of aligned blanks of limp fabric and stacking the sewn blanks which comprises robots (10 and 20) located one on each side of an operator. Each of the robots (10 and 20) is capable of gripping and removing a limp fabric blank from an associated stack of blanks and transporting the blanks to an operator. The robots (10 and 20) have arms (26) capable of axial movement and movement in a vertical plane and additionally capable of rotating about their axes through an angle of 180.degree.. At least one of the robots (10, 20) is capable of rotation about a vertical axis, effecting horizontal movement of the arm (26). The apparatus also comprises a sewing head (30) for sewing the crotch portion of the pair of aligned blanks, and a blank support/transfer carriage (41) adjacent the sewing head mounted for horizontal movement in a direction substantially parallel with the direction of sewing.

Abstract: A sewing unit (1) for producing a seam in a sewing-material part (92), in particular for the production of a dart seam in an article of clothing, has a sewing-material holder (45) which receives the sewing-material part (92) between two plate edge parts (54, 55) and moves it via a displacement drive (44) along a sewing machine (2). The sewing-material holder (45) is provided with plate edge parts (54, 55) which frictionally smooth the sewing-material part (92) as it is being fed by a feeding plate (11) into the sewing-material holder (45) which is then placed in its clamping position. This eliminates any need for a further transfer of the sewing-material part 92 to a clamping rail for guiding it along the sewing machine 2. The plate edge parts (54, 55) serve, in the clamped position of the sewing-material part (92), for holding the sewing-material part (92) during the sewing process.

Abstract: An industrial sewing machine comprises a supporting frame supporting a main driving shaft rotatively driving two driven shafts, on one of the driven shafts being keyed cam members for reciprocally driving in a horizontal plane a horizontal needle bar, as well as grippers for feeding with fabric operating hook elements, the other driven shaft operating a vertically displaceable vertical needle bar arranged downstream of the horizontal needle bar, the spacing of the horizontal and vertical needle bars being so designed that the needles supported thereby can make simultaneously seaming lines.

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: An upper feed device for a sewing machine comprises an upper feed arm having its base end coupled with a longitudinally swinging crank and an upper feed dog attached at its front end. The mechanism for vertically moving the upper feed arm consists of a clutch mechanism comprising a lever rotatably mounted on a vertical feed shaft and swinging in cooperation with the main shaft, an abutment disposed on the lever and an abutment of a collar disposed on the vertical feed shaft, which is capable of disconnecting the cooperation of the lever and the vertical feed shaft, and a crank having a roller slidably fitting with a guide disposed parallel to the upper feed arm and which moves vertically through its attachment to the vertical feed shaft. A block is provided below the roller to engage with the free lower end surface of the crank and is adjustable in its mounting position to prevent the roller from descending more than specified.

Abstract: A rotatably mounted needle plate (30) in the form of a cylindrical sleeve is provided for a sewing machine (1) with which seams can be produced as a result of a relative movement between the sewing machine (1) and a cloth holder (68). The needle plate (30) has at least one needle-plate attachment (37) and at least two needle holes (38, 38'), a longitudinal axis (39) of each needle hole (38, 38') being radial to an axis of rotation (40) of the needle plate (30). The needle-plate attachment (37) provides cloth resting surfaces (41) surrounding each needle hole (38, 38') which are at different distances from the axis of rotation (40). By rotating the needle plate (30) there is obtained an adjustment of the sewing level, as a result of which it is assured that the lower side of the cloth will dependably rest on the cloth resting surfaces (41) during the sewing even when the cloth has partially thick regions within the course of the seam.

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: An upper cloth feeding device of a sewing machine which can have a presser foot shank attached to a presser bar such that the presser foot shank need not be detached from the presser bar for removing a removable shoe from the presser foot shank. The upper cloth feeding device has a shank holder which can hold the presser foot shank therein, an upper cloth feeding foot having friction surfaces on the underneath surface thereof, a cloth presser which slidably holds the upper cloth feeding foot with friction surfaces thereon in slits disposed therein, a cloth presser holder which pivotably holds both the cloth presser and the shank holder and a lever which is pivotably connected to side walls of the cloth presser holder and to a vertical plate of the upper cloth feeding foot by means of a connector piece.

Abstract: A method and an apparatus for loading and transferring material in order to transport the material from a loading location through a sewing machine is provided. The invention reduces the cycle time between the loading of materials by allowing the operator to load one material while a previously loaded material is in the sewing process. The use of clamps during the loading, transporting, and sewing procedures ensures that the stitching will be accurately located and the material will be in the desired configuration.

Abstract: A sewing machine includes, and can have attached thereto, a synchronizing apparatus by which a presser foot bar and a feed foot bar, and the respectively connected presser foot and feed foot, are lifted and lowered in synchronization with the vertical reciprocation of a needle bar to which a stitching needle is connected. A lift body is pivoted to both the presser foot bar and the feed foot bar. The lift body has an arcuate surface against which a roller connected to the needle bar acts to pivot the lift body alternately about the two connections. This provides appropriate lifting and lowering of the presser foot bar and the lift foot bar during a stitching cycle.

Abstract: A cam unit comprising a main cam; a first auxiliary cam provided in contact with the main cam; a second auxiliary cam provided in contact with the first auxiliary cam; a rod provided between the main cam and the second auxiliary cam and having a slenderly shaped hole in which the peripheral portion of the first auxiliary cam is located in contact with the rod so that the rod is swung while being guided by the first auxiliary cam; a motion transmission means secured to the rod and located on the peripheral portion of the main cam so as to move the rod in accordance with the contour of the main cam; a jump prevention means secured to the rod and located on the peripheral portion of the second auxiliary cam so as to prevent the motion transmission means from jumping from the main cam; and a shaft extending through all the cams. A positive cam is constituted by the main cam, the auxiliary cams and the rod without guiding a driven member to straightly move it.

Abstract: The invention is an apparatus for transporting a limp material segment, such as cloth, along a reference axis parallel to a planar work surface. The apparatus includes a base member positioned above a work surface. A four-bar linkage assembly couples a segment coupling assembly to the base member. The four-bar linkage assembly includes first and second elongated bar assemblies, each being pivotally coupled to the base member. The length of the second bar assembly is controllable within a predetermined range. A third elongated bar assembly is pivotally coupled at a first end to the segment coupling assembly, at a second end to the second bar assembly, and at an intermediate point to the first bar assembly. In addition, the apparatus includes a rotary actuator for selectively rotating the second bar assembly about a pivot axis extending through its point of connection to the base member.

Abstract: The present invention pertains to a feed mechanism for a sewing machine for displacement-free, near-edge connection of two flexible layers of fabric in the direction of sewing. The device, which is to be used as an attachment, consists essentially of a driven, endless feeding arrangement guided in the horizontal direction and a plurality of receiving elements which are designed as clamps. The receiving elements include clamp lower parts arranged at a vertically spaced location from the fabric support surface and clamp upper parts that can be actuated like pushbuttons, as well as a pressing element acting on the clamp upper parts.With their edges that are to be connected, the fabric layers are fed into a flat feeding section and fixed and carried by a first clamp and continually fixed by consecutive clamps in the same position in the device, thus carried along the stitch formation site, and continuously released in the sewn state at a discharge point.

Abstract: An automatic cloth feeding device in a cycle sewing machine is provided with first and a second cloth pressers which are placed on a working table and respectively hold and release both ends of the cloth in the lateral direction. Rotary motion of a first rotary shaft is changed to a linear motion by a first converting mechanism to cause the first cloth presser to move laterally while rotary motion of a second rotary shaft is changed to a linear motion by a second converting mechanism to cause the second cloth presser to move laterally. The first rotary shaft and the second rotary shaft are connected with or disconnected from each other by a clutch so that the first rotary shaft is driven by or released from a drive unit.

Abstract: A device for controlling feeding quantity of a sewing machine includes a driver for driving an upper feed-dog and a lower feed-dog, a first setter for setting the feeding quantity of the lower feed-dog, a second setter for setting a ratio of the feeding quantity of the upper feed-dog to that of the lower feed-dog, a first adjuster for adjusting the feeding quantity of the lower feed-dog based on the set value at the first setter, and a second adjuster for adjusting the feeding quantity of the upper feed-dog based on the set value at the first setter and the ratio set at the second setter.

Abstract: A sewing system that is smaller and more simple in construction than the prior art. The cloth holding means and cloth clamping means are part of a X-Y-Z motion apparatus that is supported solely from the top arm of the sewing system frame.Because the spaced twin needles of the sewing system will be required to penetrate up to 14 layers of thick cloth in some anticipated applications, considerable rigidity and stability is imparted to the single needed clamp that supports the two needles by reciprocating the needle clamp with two symmetrically spaced needle bars. This minimizes canting of the needle clamp and bending of the needle bar, thereby assuring more uniform stitch lines and minimizes missed stitches.

Abstract: An upper feed mechanism of a sewing machine, in which a horizontal motion mechanism for moving the upper feed dog back and forth is provided with a double lever mechanism composed of a single arm lever, a bifurcate lever and a slider slidably mounted on both levers, and a crank lever mechanism for oscillating the levers. When a crank of the crank lever mechanism is at a top dead point or a bottom dead point, the radial directions of the levers are matched, and when the slider is moved in this state, the upper feed dog varies in the feed amount while the front position or rear position is constant.

Abstract: A sewing machine with an upper transport mechanism includes an arrangement with a pressing foot and a transport foot wherein the mass accelerations due to the movement of these members is reduced. A triangular lever member is provided with lever arms 34b, 34c which are linked with the presser foot and upper transport foot. The triangular lever member is linked so as to be angularly movable to an extent of the respective lever arms. Connecting rods of the presser foot and the upper transport foot are connected to the lever arms and are driven thereby. The movement of the connecting rods and the lever arms reduces the mass force of the respective transport foot and the presser foot. To further reduce the mass forces, the upper transport foot and the presser foot are spring loaded with respect to respective carrying elements of the upper transport foot and presser foot so that a damping action occurs.

Abstract: A cloth presser mechanism comprises a cloth presser vertically movably supported by an arm of a sewing machine. A needle bar is vertically movably supported by the arm of the sewing machine and has a needle at the lower end thereof. The mechanism further includes a rack fixed to the needle bar, a pinion rotatably supported by the arm of the sewing machine and engaged with the rack, a cam integral with the pinion, a first link having an end pivotally supported by the arm of the sewing machine and a middle portion connected to a roller which rides on the surface of the cam, and a second link having an end pivotally supported by the cloth presser. The other end of the second link is pivotally connected to the other end of the first link.

Abstract: A hemmer seamer assembly comprising an apparatus for positioning a chain of stitches for stitching onto fabric having a needle and a throat plate, including a device for positioning the chain of stitches forwardly of the needle, and a device for moving the fabric to the throat plate for sewing the chain onto the fabric.

Abstract: The automatic apparatus for the manufacture of mattress-sacks includes: a base plane supporting the sack to be manufactured and having a work side, a sewing machine overhanging by said side and adapted to operate along a border of the sack parallel to said side, an auxiliary work plane rotatable on said base plane about a vertical axis, and presser elements rotatably supported about the same vertical axis and adapted to secure on said rotatable plane the border of the sack being sewn so as to allow its rotation for the sewing of a following border perpendicular to the preceding one.

Abstract: In a sewing machine having a needle bar jogging frame in which a needle bar which can be driven with a reciprocating motion in its longitudinal direction is mounted, the jogging frame is in the form of a member of a parallel four-bar linkage. For this purpose the frame is mounted by way of a guide lever and a lever so as to be movable parallel to itself in the heat of the sewing machine. The lever and the guide lever are designed equal in length and arranged parallel to one another. This development creates a simply constructed jogging frame so that the needle bar and thus also the needle are always moved or displaced parallel to themselves in the jogging plane of the jogging frame, irrespective of the stitch length and irrespective of whether the sewing direction is forward or backward to produce lock stitches.

Abstract: The invention consists in manually inserting a first piece of fabric (49) into the bottom portion of an edge guide comprising three superposed plates (2, 3, 4). The piece of fabric is pushed towards the end of the edge guide by means of jets of air until the side (51) of the piece along which sewing is to be performed is aligned with an end abutment. A dog (17) placed beneath the bottom plate (2) presses the piece of fabric (49) against the bottom face of the middle plate (3) and then displaces it along the sewing line direction until the other side (52) of the corner has reached a reference line (53). A second piece of fabric (54) is manually inserted and is positioned in the same way as the first by means of a dog (18) placed above the top plate (4). Once both of the pieces of fabric (49 and 54) are exactly superposed, the dogs (17, 18) drive them simultaneously at the same speed under the presser foot (47) of the sewing machine.

Abstract: A hemmer seamer assembly comprising an apparatus for positioning a chain of stitches for stitching onto fabric having a needle and a throat plate, including a device for positioning the chain of stitches forwardly of the needle, and a device for moving the fabric to the throat plate for sewing the chain onto the fabric.

Abstract: An improved guide device for the horizontal motion mechanism for the upper feed dog of an overlock sewing machine including an angularly adjustable bracket element that cooperates with a vertically adjustable slide to provide adjustability in the amount of shaft oscillation while attaining higher operating speeds.

Abstract: A device for synchronizing feeds of a lower and upper fabric in a sewing machine, which device comprises a control cam, a presser bar, a turning plate with a movable presser thereon, a switching plate movable on the presser bar and connected to the control cam which moves the switching plate, and a control plate interconnected between the control cam and the movable presser and rotated to move the switching plate and thus the movable presser so that it may be pressed against the fabric being sewn.

Abstract: Herein disclosed is a material setter for a sewing machine having a hollowed folder through which a tape-like material passes to be folded before it is stitched. The material setter comprises a shoe member frictionally contacting with the material through a slot formed in the folder, a reciprocating device for reciprocatively moving the shoe member along the way of the material in the folder, and a one-way device for causing the shoe member to move the material forward only when the shoe member is moved forward by the reciprocating device.

Abstract: A sewing machine with a sensing device positioned ahead of a stitch-forming point, senses changes in the thickness of a material being fed by the sewing machine. In order to determine the difference in thickness, the sensing device has a pickup foot capable of vertical movement with a sensing surface that lies on the material adjacent the point the stitch is formed. A sensing lever is movably mounted on the pick-up foot with a sensing arm that lies on the material ahead of the sensing surface, a measuring member detects the relative movement between the pickup foot and the sensing lever.

Abstract: A universal sewing foot, for a sewing machine having a skipping top transport and a skipping bottom transport, comprises an advancing foot and a holding foot which alternately engage the workpiece. A locking member selectively locks the holding foot so that it operates either in a non-skipping mode, in which the foot is urged downward against the workpiece by a spring, or a skipping mode, in which the foot is locked to the skipping upper transport with the spring under compression.

Abstract: The present invention provides an upper feeding device of a sewing machine comprising a feeding presser foot and a holding presser foot alternatingly cooperating with it, to which is imparted by means of an oscillating means and a angle lever coupled thereto, an up and down motion extending perpendicular to a throat plate of the sewing machine. To provide an optimal drive of the presser feet, the oscillating means is formed by a cam means coacting with a jogging mechanism coupled to the angle lever. The jogging mechanism is provided with a translatorily movable slider extending vertically to the direction of movement of the presser feet. The slider is drivable at an interchangeable lever ratio by a shaft via a slide block-guide.

Abstract: A top transport device on sewing machines includes a spring-loaded presser bar mounted for vertical movement, which is firmly connected with a presser foot, and with a two-armed top transport rocker in operative connection at its upper end via a connecting linkage with a feed drive and carrying a top transport foot, the rocker being mounted on a seating disposed on the presser bar. To improve the kinematic connection between top transport foot and presser foot, the seating is mounted freely displaceable on the presser bar and connected with a bearing piece fastened on the presser bar via an articulated link mechanism, at the articulated joint of which a lifting drive engages. A transitional phase of the pressure shift between presser foot and top transport foot when the latter sets down on the work and when it lifts off results by a connection of the top transport rocker with the seating via a limitedly swingable link.

Abstract: A feed drive for the work holder of a zig-zag stitch group sewing machine comprises a rotatable cam plate and a work holder which is engaged with the plate and moved thereby within a rectilinear guide arranged adjacent the head portion of the sewing machine. The work holder is located adjacent the needle and it includes a driver plate which extends below the sewing machine arm portion and grips the workpiece from above. The cam plate is arranged in a standard of the machine and the work holder is driven by engagement of a sensing element in a groove of the cam plate which is connected to the work holder through a lever drive acting on a rotatable shaft arranged below the arm of the machine and connected with a crank and a link with a slide carrying the work holder which is disposed in a guide. The construction includes a seating for the workpiece which is movable parallel to the guide and is coupled with the driving plate.

Abstract: A presser foot lift device for an upper feed sewing machine is so arranged that an upper feed tooth is initially lifted and then lifted along with a presser foot only after the lower surface of the upper feed tooth is at a position above the upper surface of the presser foot. This two-step lifting motion is made feasible by the combined operation of an elongated slot formed in a manually rotated actuating arm and a pin formed on an actuator pivotally mounted in coaxial fashion on a supporting shaft of the actuating arm and so adapted as to be introduced into the elongated slot.

Abstract: A top feed device for a sewing machine has an upper feed dog movable horizontally and vertically in synchronism with operation of a lower feed dog. The upper feed dog is vertically moved by a spring for depressing an upper feed arm to which the upper feed dog is attached, and a crank engages the upper feed arm and is vertically swingable, the crank being held in engagement with the upper feed arm at all times to prevent striking engagement therewith. A swingable shaft to which the crank is fixed and a lever angularly movably mounted on the swingable shaft and swingable in coaction with a drive shaft have abutments projecting axially in confronting relation. The abutments on the shaft are urged by a spring to angularly move in one direction. The abutments on the lever which are held against the other abutments are disengaged therefrom in a circumferential direction when the upper feed dog reaches a throat plate and stops its downward movement.

Abstract: A sewing machine with a workpiece holding-down device comprises an arm movable between an upper position and a lower position and normally biased to the upper position. An auxiliary workpiece holding-down member is movable between an upper position and a lower position in synchronization with the rotation of a main shaft and is normally biased to the upper position. A disengageable interconnecting means is interposed between the main shaft and auxiliary holding-down member. Electromagnetic means is energized upon starting of a sewing operation and is deenergized upon the completion of formation of a seam. An operation means is operable in response to energization of the electromagnetic means to impart an operative force to the auxiliary holding-down member and a holding-down arm and releases the operative force in response to the deenergization of the electromagnetic means.

Abstract: An upper feed mechanism positively driven in four directions above the work supporting surface of the machine for concommitantly advancing work along a predetermined feed path. The upper feed mechanism includes an upper feed dog carried on the presser arm of the machine. In the usual manner, the presser arm has a presser foot hinged at one end thereof. The opposite end of the presser arm is slidably pivoted relative the machine frame such that the presser arm, presser foot and upper feed dog mechanism may be conjointly moved sidewise as a modular assemblage thus permitting operating access to the sewing area of the machine.

Abstract: An alternating presser foot with a vertically movable sole portion, fixed in the feeding direction of a feed dog, and a clamping pressure foot adapted to be placed on sewing material relative to the movable sole portion by means of a drive lever which cooperates with a needle bar for movement along with the sewing material in the feeding direction of the feed dog. For transmission of motion from the drive lever to said clamping pressure foot, an angle lever is provided, one arm of which, extends approximately vertically, defining a guide cam cooperating with a follower of the drive lever, while the other arm thereof extends approximately horizontally defining a pressure element for stressing said clamping pressure foot in order to place it in engagement with the sewing material.

Abstract: Improvements to a waistband end folding and stitching apparatus of the type in which the open terminal free end portion of an unfinished waistband having opposed fabric plies is presented to a folding station where the end portion is (1) inverted into the space between the spread plies to form an inturned edge; (2) the multiple plies of fabric are flattened by the application of pressure from a pair of opposed feet to facilitate sewing; (3) automatically transferred laterally in a horizontal plane to a seaming or stitching station, and (4) positively positioned in alignment with the sewing head for the application of at least one row of stitches parallel to and adjacent the inturned edge. The moving parts of the apparatus are hydraulically and pneumatically operated responsive to the predetermined program.

Abstract: A sewing machine with a drive for a work clamp comprises two slides movable relative to each other, one carrying the work clamp and the other carrying two tail wheels and an endless belt trained thereabout. Two stepping motors which can selectively be run in the same or in opposite directions are engaged each with a respective one of the belt strands, so that with the motors running in opposite directions, the two slides move in the lengthwise direction, while with a run in the same directions, only the slide directly carrying the work clamp is moved, namely transversely. In another embodiment, the slide directly carrying the work clamp is non-rotatably connected to one of the tail wheels.

Abstract: In a sewing machine for performing twin overedging and seaming in one high-speed operation, specially designed top and bottom variable feed dogs pull the two plies through a three needle stitching area with improved, simplified elements for diverting one ply edge while the other is being overcast. The upright overcast edge of the top ply passes through a tunnel formed through the top feed dog. A guide wall attached to the throat plate guides the top edge away from the bottom overedging station. A guard wall can be attached to the presser foot to keep the turned-up top edge away from the seaming needle. A fiber optic/pneumatic system controls automatic stop, presser foot/top feed retraction and between-work thread cutter functions. Alternative front edge guides facilitate feeding the two plies in registration.

Abstract: A hand operated sewing machine with opposing loop seizing points for forming chain stitches. A work feeding plate reciprocates with a plate member about a pivot. A flexible upstanding portion at one end of an arm is biassed by the moving plate member causing the other arm end to bias a cam affixed to the loop seizing points. This bias determines the cam path taken by a drive pin that provides motion to the loop seizing points.