Abstract: A system that can be used for suturing implants includes a first automated fixture that can comprise an articulation arm and a target device holder and a second automated fixture configured to operate as a sewing machine to sew material onto the implant. The second automated fixture uses a curved needle to form a stitch without having to release the needle in the process. The second automated fixture can also include a stitch looper that moves in coordination with the curved needle to perform a single-suture or single-thread stitch.

Abstract: Disclosed herein are a lower-thread supply device of sewing machine and a sewing method. The device includes a bobbin case (300) having an outlet (330) from which lower thread is drawn out, and a needle through-hole (340) through which a needle (600) moving downwards with upper thread (a) being fitted passes, and a hook body (200) in which the bobbin case (300) is mounted, the hook body being installed to be rotatable by a power device of a sewing machine, guiding upper thread (a2) on a sewn fabric side to a front area of the bobbin case (300) while catching and dragging the upper thread (a) via a hook (210), and guiding upper thread (a1) on a spool side to a rear area of the bobbin case (300). The bobbin case (300) is installed not to be rotated when the hook body (200) rotates.

Abstract: Hook (11, 12, 13, 14) for a lockstitch sewing machine, or parts of the hook such as the support element of the tension spring (in particular the basket or the bobbin case) or the tension spring itself, including a tension spring (80, 90, 100, 110, 120) that includes a bending towards the outside (with respect to the support element on which it is mounted and with respect to the main bending radius of the tension spring) of the tension spring's extremity designed to press on the bobbin thread, so that the pressure point (P) on the bobbin thread is the point of tangency between the bending radius (R) of the bending of the tension spring's extremity and the support element of the tension spring, so as to generate a stable tension of the bobbin thread.

Abstract: The present invention relates to an under-thread supply device for a sewing machine, and more particularly, to an enhanced under-thread supply device for a sewing machine, in which the device of the present invention and a unit for mounting said device are just partially changed so as to increase the winding amount of the under-thread of conventional sewing machines in order to achieve improved efficiency of sewing and efficiently reduce the puckering of a work piece without causing changes in the basic structure of conventional sewing machines.

Abstract: A bobbin holder that grasps a holder body and a flange of a bobbin that winds a thread n around the holder body, the holder including: an opening formed in an upper surface of the holder body; a thread holding portion that holds a thread n and is arranged in the opening so as to protrude from a center of the holder body toward an outer circumference of the holder body; and a cutting blade that cuts the thread held by the thread holding portion, the blade being disposed in one of regions inside the opening that is partitioned by the thread holding portion, wherein the cutting blade is disposed on a thread path of the thread n being pulled after the thread n, which is wound around the bobbin grasped by a grasping portion and is pulled from the other region inside the partitioned opening, is held by the thread holding portion.

Abstract: Hook for lockstitch sewing machine, both of the rotary type and of the Central Bobbin type (CB-shuttle or CB-hook), which includes a bobbin case (508, 708, 808, 908, 1008, 1108, 1208) with an improved slide, composed of multiple components, including a slide body (515a, 615a, 715a, 815a, 915a, 1115a, 1215a) which performs entirely the functions of guiding the slide on the bobbin case and of creation of the leverage with the lever (16, 16b), and at least one secondary component (582, 782, 882, 982, 1182, 1286), fixed to the slide body and apt to perform the function of slide's claw or guide and/or protection of the thread.

Abstract: The present invention relates to a lower thread bobbin for a sewing machine able to hold a thread, the bobbin comprising a crescent moon-shaped winding part on which a thread can be wound and a crescent moon-shaped securing part for covering the winding part on which the thread has been wound. The lower thread bobbin for a sewing machine has the advantage of being able to hold a greater amount of a lower thread than the very limited amount of a lower thread that is wound on general conventional bobbins, and so increasing the efficiency of sewing work as the user or sewing machinist does not replace the bobbin frequently.

Abstract: A rotary hook (1) of a lockstitch sewing machine composed of at least one hook body (2) includes a cylindrical cavity (11) and a basket (6, 6b) free to rotate in the cylindrical cavity (11), a bobbin case (8, 8b) housed in the basket (6, 6b) and a bobbin (4, 4b) housed in the bobbin case (8, 8b), elements (30, 40, 50, 60, 61, 70,) suited to create a friction between the bobbin case (8, 8b) and the basket (6, 6b), so as to prevent the bobbin case (8, 8b) to move freely and to vibrate within the plays present between the bobbin case (8, 8b) and the basket (6, 6b) and to consequently reduce the noisiness created during the sewing operation.

Abstract: A stitching machine may include a needle apparatus, a sewing thread spool receiving device, and a bobbin thread spool receiving device. The stitching machine may further include a bobbin thread tensioner configured to receive bobbin thread from the bobbin thread spool receiving device. The bobbin thread tensioner may be further configured to supply the bobbin thread to the needle apparatus. The bobbin thread spool receiving device is configured to receive a bobbin spool holding approximately 700 meters or more of bobbin thread. The bobbin thread spool receiving device may be located above a stitching location of the stitching machine. The stitching machine may provide improved access to a bobbin spool, enhanced manufacturing efficiency, and enhanced manufacturing flexibility.

Abstract: A locking mechanism for a bobbin case (5) is provided with a locking lever (35) supported pivotally in the bobbin cover (27). The locking lever is pivotal on a shaft (33). A hook-shaped end (51) is formed at the locking lever (35), which latches in the sleeve (9) in the hook and can hold the bobbin case (3) in the hook (1).

Abstract: For the continuous drive of a hook of a sewing machine, two drive cams (17) alternately engage in the back of the hook. During the passing of the upper thread loop, the respective drive cam (17) on which the thread would get hung up is out of engagement. The hook is situated in a conical hook race guide and is held therein by magnets.

Abstract: The present invention relates to a lower thread supply device for a sewing machine, comprising: a housing (100) which is fixed to a main body of a sewing machine, has a cylindrical shape in which a front side and a back side are opened along a central axis, and has a (a housing cut out portion) (110) formed by cutting the outer circumferential surface of one side; a rotation plate (200) which is connected to a power shaft of a sewing machine, has a disk shape, has a power transmission protrusion (210) formed on the front surface of the disk, and is provided at the back inner lateral side of the housing (100) to rotate; a hook body (300) which is rotatably provided inside the housing (100), has a cylindrical shape with an opened front side, a protrusion receiving part (320) formed at the back outer portion to receive the torque of the rotation plate (200) by being engaged with the power transmission protrusion (210), a bobbin mounting post (330) formed at the back inner portion, and a hook (310) that passes th

Abstract: A bobbin holding member holds a bobbin, and the bobbin holding member includes a body portion that holds detachably an outer periphery of a brim portion provided to both ends of a middle body section of the bobbin, wherein the body portion includes a fitting portion and a fitting target portion to be fitted to the fitting portion of any of the other bobbin holding members.

Abstract: A rotary hook of a lockstitch sewing machine includes at least one hook body including a cylindrical cavity and a basket freely rotatable in the cylindrical cavity, to which it is constrained by a rib, provided on the outer surface of the basket, which engages in a C-shaped race, provided in the inner wall of the cylindrical cavity of the hook body and delimited by two plane surfaces parallel to each other and by a cylindrical surface perpendicular to the plane ones, suitable to prevent axial and radial translation of the basket in the cylindrical cavity—further includes elements applying to the basket an axial pressure causing the rib of the basket to lean against one of the plane surfaces delimiting the race present in the cylindrical cavity of the hook body. Some of these elements are carried by the lockstitch sewing machine to which the rotary hook belongs.

Abstract: A bobbin case is used in a sewing machine for mounting a bobbin, and includes a case body having a base wall, a case shaft extending along a central line from the base wall for rotatably mounting the bobbin, and a rim having entry and exit holes to define a tensioning path therebetween, and a diverting concaivity configured to divert a running route which is disposed downstream of the tensioning path. A lead-out member is disposed downstream of the running route. A leaf spring is positioned on the rim, and is configured to guide an under thread of the bobbin to run along the tensioning path with an urging force, and continued on running along the running route to the lead-out member to be interlocked with an upper thread for a sewing action.

Abstract: A locking mechanism for a bobbin case (5) is provided with a locking lever (35) supported pivotally in the bobbin cover (27). The locking lever is pivotal on a shaft (33). A hook-shaped end (51) is formed at the locking lever (35), which latches in the sleeve (9) in the hook and can hold the bobbin case (3) in the hook (1).

Abstract: A spool holder includes a spool base and a thread guide mechanism including a thread guide member having thread guide portions guiding the threads extending from thread spools, respectively and a divided support pillar disposed so as to support the guide member on the spool base and including an upper support pillar having an upper end swingably mounted on the guide member and a lower support pillar having a lower end which is swingably mounted on the spool base, and a holding unit which holds the divided support pillar so that the pillar is switchable between a first position where both pillars are substantially vertically lined so that the guide member is located at an upper position in its use and a second position where both support pillars are bent at the connecting part so that the guide member is located at an accommodation position in its non-use.

Abstract: A locking device having a connection element (11) that is securely connected to the hook base (1) but can rotate is provided. On the connection element (11), a coil spring (17) is supported that is compressed after setting the bobbin case (5) on or in the hook base (1). Through a slight tilting movement, the bobbin case (5) or the bobbin (7) could be pushed and guided over the connection element (11) and then held by the force of the spring (17) in the locking position.

Abstract: The present invention provides a bobbin thread feeder of sewing machine of simple structure in which a lower thread can be reliably fed at an appropriate tension. A lower thread bobbin 21 can be removably contained through an opening for containing a lower thread bobbin 17 in a rotary hook 20 of a horizontal rotary hook 30 provided in a sewing machine frame. A thread tension plate and a thread tension spring are attached while overlapping along the inner circumference of the rotary hook 20, and function as a tension generating portion 22 for imparting resistance to pulling out a lower thread being guided through the gap between the thread tension plate and the thread tension spring. A needle plate 16 with an opening for taking the lower thread bobbin 21 in and out is provided above the rotary hook 20. The needle plate 16 comprises a guiding slit 27 that guides the lower thread formed thereon.

Abstract: A rotary hook of a lockstitch sewing machine includes at least one hook body including a cylindrical cavity and a basket freely rotatable in the cylindrical cavity, to which it is constrained by a rib, provided on the outer surface of the basket, which engages in a C-shaped race, provided in the inner wall of the cylindrical cavity of the hook body and delimited by two plane surfaces parallel to each other and by a cylindrical surface perpendicular to the plane ones, suitable to prevent axial and radial translation of the basket in the cylindrical cavity—further includes elements applying to the basket an axial pressure causing the rib of the basket to lean against one of the plane surfaces delimiting the race present in the cylindrical cavity of the hook body. Some of these elements are carried by the lockstitch sewing machine to which the rotary hook belongs.

Abstract: A bobbin holding member holds a bobbin, and the bobbin holding member includes a body portion that holds detachably an outer periphery of a brim portion provided to both ends of a middle body section of the bobbin, wherein the body portion includes a fitting portion and a fitting target portion to be fitted to the fitting portion of any of the other bobbin holding members.

Abstract: A method and device applicable to a sewing machine which has a needle and a gripper with a horizontally positioned lower bobbin for executing a seam with stitches in a sewing material being sewn, for compensating a deficiency in a longitudinal shift of the needle during a stitch being caused by an arcuate movement of the needle when it shifts sideways in a stitch, wherein the method includes the material being advanced by a feeder a length yn in the longitudinal direction of the seam on the basis of the seam setting, and wherein the sewing machine has a control including an algorithm causing the feed motor to set the feeder, so that at each stitch which includes sideways shifts of the needle it advances the sewing material a correction length en in the longitudinal direction of the seam, thereby compensating a corresponding deficiency in the needle's longitudinal shift relative to the material during the stitch being caused by the needle's arcuate sideways movement.

Abstract: A horizontal rotary hook of a sewing machine includes an inner rotary hook made of synthetic resin and housing a bobbin, an outer rotary hook made of synthetic resin and housing the inner rotary hook and rotated in a predetermined direction, an adsorption plate made of a magnetic material and mounted on one of an outer surface of a bottom wall of the inner rotary hook and an inner surface of a bottom wall of the outer rotary hook, a magnet piece formed as a thin plate and mounted in the other of the outer surface of the bottom wall of the inner rotary hook and the inner surface of the bottom wall of the outer rotary hook, and a yoke member made of a magnetic material and housing the magnet piece integrally formed with a bottom wall contacting the magnet piece and a wall surrounding an outer circumferential side of the magnet piece. The yoke member is mounted on the other of the outer surface of the bottom wall of the inner rotary hook and the inner surface of the bottom wall of the outer rotary hook.

Abstract: The hook (15) of a sewing machine (1) is mounted so that it can move on a hook carrier. Through a sliding movement of the hook carrier, the hook (15) is brought from its operating position into a bobbin case removal position. Through the sliding movement, the hook (15) with the bobbin case (17) is placed at or above the opening, which is created by the flap (13) in the lower arm (5). In this way, the removal of the bobbin case (17) or the bobbin is made considerably easier.

Abstract: A locking device for bobbins (3) in the hook base (1) of a sewing machine is provided by a locking element (21) that can move in the axial direction. The locking element (21) is spring-loaded and lies in an ejection and loading position inclined to the rotational axis (X) of the hook base (1), so that the bobbin (3) can be placed or removed. As soon as the bobbin (3) is inserted into the hook base (1), the locking element (21) tips and locks on the bobbin rod (9).

Abstract: A gripper hook for a sewing machine. The sewing machine includes a needle, a stitch plate and a housing for the gripper hook. The gripper hook includes an open cylinder and is rotatably mounted on a horizontal axis. A bobbin basket is supported inside the gripper hook receives a bobbin case. The bobbin case houses a bobbin. The needle, in executing a stitch, is brought down perpendicular to the axis of the gripper hook in front of the open part of the gripper hook through an opening in the wall of the bobbin basket such that a gripper hook tip catches the upper thread and leads the upper thread around the bobbin basket. The gripper hook has a side wall that is at least wide enough for the side wall to protect the bobbin basket from being struck by the needle when the needle tip is out of alignment.

Abstract: A sewing machine with a hook (8) that is drivable in rotation about a vertical axis comprises a bobbin case (21) with a lifter cam (31). A case lifter (33) is provided, having a sensing lever (40) and a lifter lever (32) that bears against a lifter cam (28). The sensing lever rests on a cam face (42) of an axial cam disk (39) which is mounted on the transmission shaft that actuates a hook-driving shaft (10).

Abstract: Disclosed is a bobbin case of a rotary shuttle device for a sewing machine, in which an under thread pulled out of a bobbin is continuously and stably supplied to a sewing region.

Abstract: A shuttle body 3 having aloop seizing beak 10 for seizing a needle thread 9 is rotatably attached to a shuttle race body 2, pressed by a driver 4, and continuously rotated in a rotation direction B in synchronization with vertical motion of a needle 8. A bobbin case 5 in which a bobbin thread 12 wound around a bobbin 5 is accommodated is attached to the shuttle body 3. Under a state where the bobbin thread 12 is pulled out from the bobbin case 5, the shuttle body 3 is rotated, the needle thread 9 is seized by the loop seizing beak 10, the loop of the needle thread 9 is expanded along the outer face of the shuttle body 3, the loop of the needle thread 9 is passed over the shuttle body 3 and the bobbin case 5 so that the shuttle body 3 and the bobbin case 5 are passed through the loop of the needle thread 9, whereby the needle thread 9 is wound around the bobbin thread 12 and a stitch can be formed.

Abstract: A bobbin for a sewing machine which is rotatably disposed in a rotary shell device of the machine to supply and under thread when performing a sewing operation, comprises of winding shaft separately inserted onto a fixed shaft of the rotary shuttle and on which the under thread is substantially wound, a first flange integrally formed at one end of the winding shaft, a second flange integrally formed at the other end of the winding shaft, and a partition flange forming a first winding portion between the first flange and the partition flange and forming a second winding portion between the second flange and the partition flange, a plurality of saw-toothed protrusions being formed at an entire outer circumference of the partition flange, and the protrusions having a linear sidewall that is oriented in a radial direction of the partition flange.

Abstract: A bobbin basket for use with a lock-stitch sewing machine. The bobbin basket defines a receptacle for a thread-carrying bobbin case. The bobbin basket has a wall extending around a central axis and a rib projecting radially from the wall for reception in a raceway of a rotary loop taker, to which the bobbin basket can be operably connected. The bobbin basket is molded from a TORLON®-based material commercially sold under the designation PXM01017.

Abstract: Disclosed is a bobbin for a sewing machine, in which an under thread is continuously and stably pulled out without entanglement or cut of the under thread.

Abstract: Disclosed is a bobbin case of a rotary shuttle device for a sewing machine, in which an under thread pulled out of a bobbin is continuously and stably supplied to a sewing region.

Abstract: A revolving shuttle for double-stitch sewing machines having an improved thread-holding capacity without a substantial increase in the volume of the bobbin case, and allowing an easy removal of the bobbin case. The novel shuttle comprises a bobbin case which can be removed from the shuttle by a magnet. The fact that the bobbin consists in part of a ferromagnetic material guarantees safe removal of the bobbin case and the bobbin. This allows the conventional mechanical removal mechanism arranged on the end face of the bobbin case to be omitted, and provides the possibility either to use a larger bobbin with unchanged volume of the bobbin case, or to reduce the volume of the bobbin case for a normal bobbin.

Abstract: A bobbin case for accommodating a bobbin which has a shaft portion and a collar portion formed on both sides of the shaft portion on which a thread is wound, the bobbin case comprises: an opening being opened on at least one side of an axial direction of the shaft portion, for detachably accommodating the bobbin; a thread take-up portion provided in the axial direction opposite to the opening, for pulling out the thread of the bobbin; and a holding member which makes contact with the bobbin and nonrotatably holds the bobbin.

Abstract: A hook system for a sewing machine having a hook assembly with a first operating axis, a bobbin basket assembly which is mounted to the hook assembly for movement relative to the hook assembly around the first operating axis, and a bobbin case assembly which is mounted on and separable from the bobbin basket assembly and defines at least a part of a receptacle for a bobbin. The bobbin case assembly has a peripheral wall extending around the first operating axis and a confining wall extending from the peripheral wall. The peripheral wall and confining wall have a combined mass. At least 50% of the combined mass of the peripheral wall and confining wall is made from a non-metal material.

Abstract: A spool capsule for a sewing machine for receiving a lower thread spool, having a concentrically disposed bore for mounting the spool capsule on a spool carrier pin, with a spring, serving as a locking device for axially retaining the spool capsule on the spool carrier pin, being inserted into a spool receiving space of the spool capsule. A section of the spring is constructed so that it is elastically displaceable radially, relative to the concentrically disposed bore, penetrating the bore in a manner analogous to a tendon. The locking device includes only a single movable element, which serves for both arresting the spool capsule on the pin of the spool and as an actuating device. This single element includes a spring, which is retained in a centrally-extending groove in a deepening of the spool capsule, and projects outwardly, at one point, through an opening in the surface of the spool capsule.

Abstract: A bobbin which is housed in a bobbin case holder is held, as it is elastically pressed by a peripheral wall of a bobbin case. Passing through a gap which is created between an outermost portion of a flange of the bobbin which is disposed on an open end side of the bobbin case holder and an inner peripheral surface of the peripheral wall of the bobbin case and between the flange of the bobbin which is disposed on the open end side of the bobbin case holder and the inner surface of an end wall of the bobbin case, a bobbin thread which is wound around the bobbin is led outside through the bobbin thread leading hole which is formed in the end wall of the bobbin case.

Abstract: A bobbin assembly having a base wall, a center post projecting away from the base wall in cantilever fashion, a peripheral wall assembly which extends at least partially around the center post, a hook assembly and at least one of a) a thread cutting slot and b) a knife edge on the bobbin assembly. At least a part of the hook assembly is rotatable around a first axis to engage a thread and cause an engaged thread to be formed into a loop as an incident of the at least part of the hook assembly rotating around the first axis. The at least one of the a) thread cutting slot and b) knife edge on the bobbin assembly severs a thread which is formed in a loop by the hook assembly as the at least part of the hook assembly is rotated around the first axis in operation, which loop, if constricted, would wrap against the center post.

Abstract: A bobbin casing assembly for a sewing machine having a driver, a main shaft, and a needle bar. The bobbin casing assembly comprises a bobbin casing and an engaging member protruding outwardly from the bobbin casing, an upper end of the engaging member being disposed below an upper surface of the driver when an angle of rotation of the main shaft is substantially in a range of 5.degree. to 35.degree., wherein the angle of rotation of the main shaft is 0.degree. when the needle bar is at a top dead point.

Abstract: A hook assembly includes a bearing rib on a bobbin case basket or at least a surface layer thereof composed of a synthetic resin, such as a liquid crystal polymer, which has properties such that the amount of the rotating friction generated between such surface layer and an inner surface layer of a groove shaped bearing raceway in which the bearing rib is fitted is lower, with no industrial sewing machine oil therebetween than such industrial sewing machine oil where to be provided therebetween. The hook assembly thus has good durability without any lubrication being provided. Accordingly, oil staining of threads and sewing materials by a lubricant is avoided, and sewing quality is enhanced.

Abstract: A bobbin basket for use with a rotary loop taker in a lock stitch sewing machine. The bobbin basket has an integrally formed bearing rib formed of synthetic resin affixed to a metallic cylindrical side wall. Thread grooving protection members are inserted into insert housings at specified areas where the needle thread loop slides against the thread pick up and thread cast off notches. The insert housings are self contained on the integrally formed bearing rib.

Abstract: A horizontal rotating hook for a sewing machine which has a structure so that an opener mechanism, which is adapted to wear and provide noise, is not required. The opener structure is avoided by using a needle thread fastener that is located adjacent to a rotating hook bobbin case holder position bracket in a rotating hook bobbin case holder for fastening needle thread temporarily. Thus, when the loop of the needle thread captured by the hook point of a rotating hook goes through into the rotating hook bobbin case holder, the rotating hook bobbin case holder is moved in a direction opposite to the rotation direction of the rotating hook (reversed) by the tension of the thread.

Abstract: A bobbin case holder body and a track projection portion are made of steel. A coating member of a liquid crystal polymer is integrally molded to the outer surface of the track projection portion so as to have a thickness t which is selected to be 0.3 to 0.5 mm. A part of the coating member is fitted into a groove formed in the track projection portion, thereby preventing the member from peeling off. In a loop spreading portion, the track projection portion made of steel is exposed from the coating member so that a so-called thread handing area is prevented from being formed. Therefore, wear resistance and durability are improved.

Abstract: A polymeric bobbin basket having an increased mass with a partial undercut to engage a latching mechanism on a bobbin case. A dissimilar material of greater strength and fatigue resistance than the polymeric material used in the center post is embedded within the interior of the center post less than the full extent of the center post in an arrangement that absorbs vibration and increases the strength and fatigue resistance of the center post. A shoulder spacing between the materials form the undercut.

Abstract: The friction coefficient between a track projection of an inner bobbin case holder and a track groove of an outer loop taker is reduced so that the outer loop taker can be rotated a small torque. One portion of the inner bobbin case holder opposite to a needle location is made of a synthetic resin or a synthetic resin containing metal powder carbon fiber, glass grains, ceramic powder or the like.

Abstract: An electronic sewing machine whose needle bar assembly is made to reciprocate by means of a pair of cooperating solenoids in conjunction with a bobbin driven by a stepping motor to accomplish the sewing. The stepping motor's steps are made variable programmatically by a CPU attached to the machine such that the tightness of a stitch may be controlled. Additionally, the machine may be programmed to deliver a defined number of stitches in a defined number of stitch runs, position the needle up or down, report a variety of accounting and maintenance data and can be taught to perform a variety of sewing runs.

Abstract: A horizontal axis full rotary hook for a sewing machine, including a generally cylindrical hook base having a point of hook, an inner circumferential surface, and a guide groove formed in the inner circumferential surface; and a generally cylindrical bobbin-case holder having an inner circumferential surface, an outer circumferential surface, and a part-circumferential rail provided on the outer circumferential surface, the bobbin-case holder being supported by the hook base such that the bobbin-case holder is freely rotatable relative to the rotary hook while the rail is guided in the guide groove, the bobbin-case holder having a needle aperture which allows a sewing needle with an upper thread to be moved down to a bottom position thereof, the needle aperture having a first inclined inner surface which is opposite to the point of hook with respect to the needle at the bottom position, a distance between the needle at the bottom position and the first inclined inner surface as measured in a direction paralle

Abstract: The bobbin case which is received by the looper has an upstanding generally cylindrical wall which surrounds the looper-thread bobbin. Forming part of the wall is a free-standing finger against which an end of a leaf spring rests. The looper thread, which has been withdrawn from the looper-thread bobbin and wrapped around the finger, is pulled through the constricted place between the leaf spring and the finger and then conducted through a threading slot provided by a radially-extending cam on the outer surface of the wall. The looper thread then comes against an inclined, downward-facing shoulder provided on the outside of the wall, slides down the shoulder, and passes finally into a long horizontal slot in the wall. The looper thread exits the bobbin case at an end point of the horizontal slot for being dependably caught by a thread catcher of a thread-cutting device.

Abstract: A bobbin basket for use with a rotary loop-taker in a lock-stitch sewing machine is disclosed. The basket is integrally formed of plastic, with damage resistant members for reducing wear and impact damage at specified locations. The extent of each such location may be only a small fraction of the potential area of wear and damage. Inserts are disclosed for the needle thread stop, the needle thread pick-up notch, the upstream side wall of a rotation-restraining notch, the bearing rib, and the downstream side wall of the rotation-restraining notch.