282results about "Loop takers" patented technology

The utility model relates to the technical field of sewing machines, in particular to a guide rail of an inner shuttle frame, the inner shuttle frame and a rotating shuttle, which comprises a non-closed annular guide rail body with a self-lubricating wear-resistant function, a thread hooking head is arranged at one end of the annular guide rail body, and a thread loosening head is arranged at the other end of the annular guide rail body. The inner side face of the annular guide rail body is concavely provided with a mounting cavity and a plurality of meshing holes concavely formed in the side wall of the mounting cavity, and the meshing holes are distributed along the mounting cavity. The annular guide rail body has the self-lubricating and wear-resisting functions, the guide rail is firmly connected to the outer side wall of the inner shuttle body, and the guide rail on the inner shuttle body is high in position precision and good in stability.

The utility model relates to the technical field of sewing machines, in particular to an outer shuttle frame and a rotating shuttle, which comprise an outer shuttle main body with an integral structure, a mounting cavity arranged in the middle of the outer shuttle main body, a guide groove concavely arranged on the side wall of the mounting cavity and a mounting surface arranged on the top end surface of the guide groove, and at least one arc-shaped limiting piece detachably arranged on the mounting surface. The arc-shaped limiting piece is used for limiting the guide rail of the inner shuttle frame in the guide groove, the side wall of the outer shuttle body is provided with at least one dust discharging hole communicated with the guide groove, the top edge of the outer shuttle body is provided with a thread pushing protrusion, a needle inserting groove located below the thread pushing protrusion and a needle protecting face connected with the needle inserting groove, and the needle inserting groove is used for insertion of a machine needle. The outer shuttle body is of an integrated structure, the structural stability is good, the upper threads are pushed outwards through the thread pushing protrusions, the upper threads are convenient to loosen, the needle protection faces are arranged for limiting and protecting the machine needles, dust in the guide grooves is discharged through the dust discharging holes, heat dissipation is facilitated, and the fault probability that the inner shuttle frame is clamped in the outer shuttle body is reduced.

The rotating shuttle comprises a rotating shuttle frame, a rotating shuttle race, a rotating shuttle plate and a thread guide plate, the rotating shuttle plate and the thread guide plate are fixed to the side edge of the rotating shuttle race through fastening screws respectively, the rotating shuttle plate comprises the pressing piece tip and a shuttle plate body which are in a separated state, the pressing piece tip comprises a top plate, a side plate and a tip end, a U-shaped groove is formed in the side plate, and the top plate is connected with the top plate. The U-shaped groove comprises an inclined section, the symmetrical line of the inclined section points to the tip end, an included angle alpha is formed between the symmetrical line of the inclined section and the horizontal line, the two ends of the inclined section are arranged at the outer end point of the middle portion and the tail portion respectively, screw holes are formed in the side edges, and the U-shaped groove is fixedly connected with the screw holes through positioning bolts. The part, making contact with the top plate, of the top face of the side edge is provided with a cut short face, the cut short face makes contact with the bottom face of the top plate to form a receding gap, and when the positioning bolt is arranged at the outer end point, the cut short face is matched with the top plate through the receding gap. The rotating shuttle disclosed by the utility model can adapt to different thread-off duration requirements.

The invention provides a sewing machine, and belongs to the technical field of sewing equipment. The problem that an existing sewing machine is insufficient in sewing quality is solved. The sewing machine comprises a base, a needle plate with a needle falling hole, a rotating shuttle located below the needle plate, a thread shifting rod and a rotating piece capable of horizontally rotating, a guide piece located on the side portion of the rotating shuttle and capable of horizontally swinging is arranged on the base, the thread shifting rod comprises a rod body and an arc-strip-shaped thread shifting head, and the rod body is connected to the guide piece in a sliding mode in the axial direction of the rod body. One end of the thread pulling head is fixedly connected to the end, close to the rotating shuttle, of the rod body and bent upwards relative to the rod body, the other end of the rod body is rotationally connected to the position, deviating from the rotating center of the rotating piece, of the rotating piece, and when the rotating piece drives the rod body to move, the other end of the thread pulling head can be located between the needle falling hole and the rotating shuttle. The sewing quality is further improved, and the manufacturing cost is remarkably reduced on the basis.

The utility model provides a sewing machine, and belongs to the technical field of sewing equipment. The problem that an existing sewing machine is insufficient in sewing quality is solved. The sewing machine comprises a base, a needle plate with a needle falling hole, a rotating shuttle located below the needle plate, a thread shifting rod and a rotating piece capable of horizontally rotating, a guide piece located on the side portion of the rotating shuttle and capable of horizontally swinging is arranged on the base, the thread shifting rod comprises a rod body and an arc-strip-shaped thread shifting head, and the rod body is connected to the guide piece in a sliding mode in the axial direction of the rod body. One end of the thread pulling head is fixedly connected to the end, close to the rotating shuttle, of the rod body and bent upwards relative to the rod body, the other end of the rod body is rotationally connected to the position, deviating from the rotating center of the rotating piece, of the rotating piece, and when the rotating piece drives the rod body to move, the other end of the thread pulling head can be located between the needle falling hole and the rotating shuttle. According to the utility model, the sewing quality is further improved, and the manufacturing cost is obviously reduced on the basis.

The invention relates to the technical field of sewing equipment, in particular to a thread locking device and a sewing machine. The thread locking device comprises a machine body, a thread locking module, a bottom thread clamping module and a bottom thread tightening module, and a curved needle is installed in the machine body and used for driving a bottom thread to move. The thread locking module comprises a first driving part, a connecting rod assembly and a thread locking knife, the first driving part is installed on the machine body, the output end of the first driving part is connected with the connecting rod assembly, and the thread locking knife is installed at the end, away from the first driving part, of the connecting rod assembly; and the thread locking knife is driven to move towards or away from the curved needle. The bottom line clamping module is installed on the machine body and used for clamping a bottom line during line locking so as to prevent the bottom line from moving. The bottom thread tightening module is installed on the machine body and used for pulling the bottom thread during thread locking so as to tighten the bottom thread. According to the thread locking device and the sewing machine, the problem that an existing sewing machine thread locking device is low in thread locking success rate is solved.

The utility model relates to a sewing machine which comprises a rotating shuttle body, a shuttle peg and a detection device. The rotating shuttle body is arranged on the machine body and internally provided with a containing cavity. The shuttle peg is rotatably arranged in the containing cavity in the axial direction of the shuttle peg, the shuttle peg comprises a first panel, a second panel and a shuttle peg shaft, a side face hole is formed in the first panel, and the reflection coefficient of the second panel is larger than that of the first panel; detection signals of the detection device correspond to the side face holes, the detection device collects the detection signals reflected by the first panel or the second panel and generates reflection signals when the shuttle peg rotates, and the rotating speed of the shuttle peg is calculated through the reflection signals. According to the invention, the surface with a high reflection coefficient is arranged on the second panel and is compared with the side surface hole in the first panel, so that the laser sensor can recognize a hole signal more accurately, and the negative influence of high reflectivity of a material on the recognition capability of the sensor is overcome; the technical problem that in the prior art, when a shuttle peg rotates, high reflectivity of the material of the shuttle peg affects the rotating speed detection accuracy is solved.

The present invention addresses the problem of preventing hitch stitches caused by lower thread factors. A needle plate (19) has a needle hole (19a) and a guide hole (31) that communicates with the needle hole. The guide hole is offset toward a front surface of a sewing machine and is also offset in the rotation direction of a bobbin case from the line of vertical movement of a sewing needle. The needle plate also has a groove part (32) that extends from the guide hole (31) in front of the needle hole in the direction opposite the rotation direction of the bobbin case. The top of the groove part and the portion of the groove part that leads to the guide hole are open, and the remainder of the groove part is a bottom surface and a side wall. During a sewing operation, a lower thread that protrudes from the bobbin case extends upward through the needle hole or the guide hole. Depending on the movement direction of a holder (a frame 5) for an article to be sewed, the lower thread passes through the guide hole and is guided to the front side of the needle hole via the groove part. The bottom surface of the groove part is closed, which prevents an upper thread loop that rises along the lower thread from catching on the groove part.

An apparatus and method for applying stitches to a decorative component having a three dimensional configuration is provided. A head for applying stitches to a decorative component having a three dimensional configuration, including: a needle bar assembly operatively coupled to the head; a looper configured to cooperate with the needle bar assembly in order to provide a plurality of stitches in the decorative component, the looper rotating in a plane parallel to the decorative component; a post assembly configured to drive the looper in a reciprocating fashion in the plane, wherein the post assembly is operatively coupled to a motor configured to drive the needle bar assembly in a reciprocating fashion, the post assembly being operatively coupled to the head via a cylinder arm assembly and a downshaft assembly; and wherein the cylinder arm assembly is rotated in a synchronized manner with a rock frame through mechanical linkage connecting a rock frame drive shaft to the cylinder arm assembly.

The utility model provides a needle skipping prevention device which is arranged in a sewing machine, and the sewing machine comprises a bottom plate, a needle plate arranged on the upper surface of the bottom plate, a rotating shuttle arranged below the needle plate, and a machine needle which reciprocates up and down. The machine needle guides an upper thread to sequentially penetrate through a sewing material placed on the needle plate and the needle plate from top to bottom and then ascend, a thread ring is formed below the needle plate, the needle skipping prevention device comprises a thread blocking piece arranged between the rotating shuttle and the needle plate, and the thread blocking piece comprises a thread blocking part extending in the direction where the thread ring is located. The utility model further provides a sewing machine which comprises the needle skipping prevention device. The utility model has the beneficial effects that the thread blocking piece is arranged between the rotating shuttle and the needle plate, and the thread blocking piece applies extra resistance to the thread ring, so that the purpose of expanding the thread ring is achieved, the thread hooking of the rotating shuttle is more convenient, and the needle skipping phenomenon is reduced.

The present invention relates to the technical field of sewing, and, in particular, a vertical shuttle bed inner shuttle, comprising an inner shuttle, a shuttle bobbin case with a bottom-thread outer end check, a spring piece, and a bobbin with a bottom-thread inner end clamping function. The inner shuttle integrates the shuttle bobbin case and the bobbin, the bobbin is connected to a coreless bottom thread core, and the shuttle bobbin case with the bottom-thread outer end check is connected to the side wall of the inner shuttle. In the present invention, the shuttle bobbin case with the bottom-thread outer end check is directly designed on the inner shuttle, and the spring piece is designed to provide adjustable thread release damping. The bobbin with the bottom-thread inner end clamping function is designed to mount the coreless bottom thread core, and under the fastening action of a fixing screw, the spring piece provides essential damping to the bobbin, preventing excessive thread release caused by sewing vibrations and thread release inertia. When a bottom thread is depleted, sewing can be resumed by simply loading a new bottom thread core onto the bobbin, and the thread core usage status and remaining amount can be directly visually monitored from the end face, thus simplifying the steps of vertical shuttle bed bobbin core replacement, such that sewing can be resumed simply with a single action of loading the thread core, making the device more convenient to use.

The utility model relates to an outer shuttle, a rotating shuttle and a sewing machine, the outer shuttle comprises a base structure, the base structure is provided with a rotating shuttle shaft mounting hole, a lubricating oil containing space and a lubricating oil communication channel, and the lubricating oil communication channel is communicated with the lubricating oil containing space and the exterior of the base structure; the moon ring structure is arranged on the base structure and extends towards one side far away from the rotating shuttle shaft; an outlet of the lubricating oil communicating channel is located in the side, away from the rotating shuttle shaft, of the base structure and located in the moon ring structure. According to the technical scheme, the problem that in the prior art, the service cycle of a rotating shuttle is short is effectively solved.

The present application belongs to the technical field of sewing machines, and relates to a thread catching and air suction device of a sewing machine, which comprises: a rotating hook arranged below a bottom plate of the sewing machine and driven by a lower shaft to rotate along a first circumferential direction about an axis thereof; a thread cutting assembly comprising a fixed blade and a movable blade, the fixed blade being fixed below the bottom plate, the movable blade being in an arc-shaped plate structure, the arc shape of the movable blade being arranged at a distance from and surrounding an outer periphery of the rotating hook, the movable blade being rotatable from a sewing position to a thread cutting position along a second circumferential direction; a thread catching assembly comprising an arc-shaped thread catching plate, the arc shape of the thread catching plate being arranged at a distance from and surrounding the outer periphery of the rotating hook, an end of the thread catching plate being provided with a thread catching hole, the thread catching plate being rotatable from the sewing position to a thread catching position along the second circumferential direction; and an air suction assembly comprising an air suction pipe connected with a negative pressure device. The thread catching and air suction device of the sewing machine provided by the present application can solve the bird nest problem of the sewing machine, and has excellent high-speed adaptability and high motion precision.

The invention discloses a crescent rotating shuttle peg shell. The crescent rotating shuttle peg housing according to an embodiment of the present invention is characterized by integrally comprising: an upper thread guide part (10); a lower wire guide ring (20); a fixing aid (35); a center fixing part (30); and a discharge guide spring member (50).

The utility model discloses a multi-head high-speed quilting machine which comprises a feeding mechanism, a thread stand, a connecting piece, a front standing table, a main machine, an X-direction moving mechanism, a cloth spreading mechanism and a rear standing table. The feeding mechanism is located at the foremost end of the equipment and connected with the X-direction moving mechanism through a connecting piece. The feeding mechanism is connected with the coil holder; the front standing table is located between the main machine and the wire frame. The X-direction moving mechanism is connected with the host; the cloth spreading mechanism is connected with the X-direction moving mechanism; the rear standing table is positioned behind the main machine; the quilting machine solves the problems of poor thick material sewing capacity and low sewing speed when multiple layers of materials are sewn in the quilting field, greatly improves the production efficiency, and is suitable for large-scale and industrial production requirements.

The present application proposes a split-type flat-bed sewing machine, which specifically relates to the technical field of flat-bed sewing machine manufacturing. The flat-bed sewing machine has a frame, a table, a thread-up mechanism and a thread-down mechanism, and is characterized in that the thread-up mechanism at least has a needle bar assembly, a presser foot lifting assembly and a thread-taking assembly, and the thread-down mechanism at least has a feed dog assembly, a rotary hook assembly and a thread-cutting assembly, and there is no mechanical transmission connection between the thread-up mechanism and the frame, and the thread-down mechanism has no mechanical transmission connected to the table. The present application proposes a split-type flat-bed sewing machine, which has an thread-up mechanism and a thread-down mechanism that each operate independently, and cleverly separates the thread-up mechanism and the thread-down mechanism in terms of mechanical transmission, cancels the traditional upper and lower linkage mechanical transmission structure, and realizes the oil-free operation of the flat-bed sewing machine mechanical transmission mechanism without lubrication, simplifies the mechanical structure, and greatly reduces the manufacturing cost of the sewing machine, and has a high promotion value.

The utility model discloses vertical sewing equipment with a fixed machine head, which comprises a machine base, a machine head frame and a vertical shuttle, a needle bar mechanism is arranged above the machine base, the machine head frame is arranged below the machine base and is opposite to the needle bar mechanism, and the machine head frame comprises a horizontally arranged main shaft and a first driving device connected with the main shaft; the machine head frame is provided with a pivoting seat, the pivoting seat is provided with a vertically-arranged driving shaft in a rotating mode, the driving shaft is connected with a main shaft, the main shaft can drive the driving shaft to rotate, the vertical shuttle and the driving shaft are arranged in parallel and are vertically arranged on the pivoting seat, the vertical shuttle is arranged in a pivoting mode, the driving shaft can drive the vertical shuttle to work, and a thread passing hole is formed in the middle of the vertical shuttle. And the needle rod can rotate between a position extending into the thread passing hole and a position far away from the thread passing hole. The main shaft which is horizontally arranged is matched with the driving shaft which is vertically arranged, so that the vertical shuttle which is vertically arranged is driven to rotate, a plurality of devices are driven by one structure, and the whole device is more compact.

To bring an interval of two sewing needles closer in a two needle sewing machine using a half-rotary shuttle.SOLUTION: A sewing machine includes: a needle bar reciprocating in the vertical direction while holding a sewing needle on which a needle thread is laid; a needle plate arranged below the needle bar, and having a needle hole in which the sewing needle is inserted; a shuttle arranged below the needle plate, and supplying a bobbin thread; and a thread cutter for cutting the needle thread and the bobbin thread in a state where the sewing needle is arranged above the needle plate. The thread cutter includes: a fixed knife fixed on a lower surface of the needle plate; and a movable knife rotatable between a stand-by position and an advance position around a pivot provided on the lower surface of the needle plate. The movable knife includes a handling part which enters a needle thread loop formed below the needle hole by rotating toward the advance position, and which divides the needle thread loop into a needle side portion and a seam side portion. The handling part enters the needle thread loop in such a manner that the needle side portion is arranged further outside in the radial direction of the pivot than the seam side portion and the bobbin thread.SELECTED DRAWING: Figure 10

A sewing machine that suppresses sewing defects is provided. The sewing machine includes: a sewing needle, held by a needle bar and moving back and forth while holding an upper thread; a shuttle, configured to hold a bobbin around which a lower thread is wound and which is housed in a bobbin case, and cooperating with the sewing needle to form a seam; a presser foot member, configured to press a to-be-sewn article at a sewing position directly below the sewing needle; a feeding mechanism, feeding the to-be-sewn article from the sewing position to a first direction; a needle drive portion, provided separately from a belt drive portion to synchronously move the sewing needle and the presser foot component in the first direction; and a control portion, which controls so that the needle drive portion and the belt drive portion operate independently.

The present invention aims to avoid occurrence of a hitch stitch caused by a lower thread. A needle plate (19) has a needle hole (19a) and a guide hole (31) communicating with the needle hole. The guide hole is located near a front side of a sewing machine and positionally deviated from an up-down movement trajectory of a sewing needle in a rotating direction of a rotary hook. Further, the needle plate has a groove (32) formed in front of the needle hole and extending from the guide hole (31) in a direction opposite to the rotating direction of the rotary hook. While the groove is open upward and at its portion leading to the guide hole, the other portions of the groove are defined by a bottom surface and side walls. In a sewing operation, a lower thread moved out of the rotary hook extends upward through the needle hole or the guide hole. Depending on a direction in which a holding member (frame 5) holding a sewing workpiece moves, the lower thread passes through the guide hole to be guided to the front of the needle hole via the groove. Because the groove is closed at the bottom surface, an upper thread loop moving upward along the lower thread can be prevented from getting caught in the groove.

Apparatuses, methods, and computer program products for quilting webs without compressing the webs. A quilting machine (10, 10a) includes a needle bar (160) to which needles (120) are attached, needle thread (284) passing through each needle (120), a looper shaft (188) to which loopers (282) are attached, a looper (282) corresponding to each needle (120) and from which looper thread (288) is provided to form stitches (530,532), and a retainer bar (190) to which spreaders (191) are attached to facilitate stitching. A drive pulley (132) powered by a first servo motor (130) rotates cranks (156) to move the needles (120) through a cycle and rotates a belt (166) which rotates an indexer pulley (168). Rotation of the indexer pulley (168) oscillates the looper shaft (188) and reciprocates the retainer bar (190). Another drive pulley (48) powered by a second servo motor (40) operates to move an input web (22) through the machine (10,10a) between chain stiches.

The present application provides a thread-hooking floating rotary shuttle, which specifically relates to the technical field of sewing machine manufacturing. It includes a wire rack intelligently placed in the inner cavity of a floating bobbin case. The floating bobbin case and the wire rack are placed in the inner cavity of a rotary shuttle fixed seat. The rotary shuttle fixed seat is connected to a positioning connecting rod. An anti-slip-out baffle is arranged at the front part of the rotary shuttle fixed seat. A bearing is arranged between the hollow main shaft of the motor and the positioning connecting rod. The motor is connected to a hooking needle. The thread-hooking floating rotary shuttle of the present application has the advantages of no need for lubricating oil, no wear, high life, no need to match a complex speed-changing gear set, improves the overall performance of the sewing machine, and reduces the manufacturing cost of the sewing machine. The thread-hooking floating rotary shuttle of the present application subverts the traditional design and manufacturing thinking of sewing machines and has high popularization value.

The present invention addresses the problem of avoiding formation of a hitch stitch caused by a bobbin thread. A shuttle (3) includes: a bobbin case (40) for storing a bobbin-thread bobbin; an inner shuttle (50); and an outer shuttle (60). A needle location hole (51) is provided in the front surface of the upper part of the inner shuttle. A recess (52) is formed at a position (e.g., position to the left of the vertical motion line of a sewing needle) offset in the rotation direction of the outer shuttle from the needle location hole in the front surface of the upper part of the inner shuttle. The recess (52) is open at the front side and above and below, and the back side thereof forms a wall surface. The bobbin case is provided with a thread take-up member (41) for directing the bobbin thread delivered from the bobbin-thread bobbin toward the recess. The bobbin thread delivered from the bobbin-thread bobbin passes through the recess via the thread take-up member, and is directed toward a needle hole in a needle plate above the recess. Since the recess is at a position to the left of the vertical motion line of the sewing needle, the path of the bobbin thread from the shuttle to the needle hole is to the left of the vertical motion line of the sewing needle, and hitch stitch formation caused by the bobbin thread can be structurally avoided.

The utility model discloses a sewing machine rotating shuttle with plastic damping, which comprises an outer shuttle, an inner shuttle is rotatably arranged on the inner side of the outer shuttle, a moon ring and a shuttle skin which are used for guiding sewing threads are mounted on the outer side of the outer shuttle, a guide rail is arranged on the outer side of the inner shuttle, and a combined hook head is arranged at the end of the guide rail. The combined hook head is composed of a plastic part and a guide rail hook line head part, the guide rail hook line head part is located in the middle of the plastic part, the guide rail hook line head part and the inner shuttle are of an integrated structure, a mounting groove matched with the guide rail hook line head part in shape is formed in the inner side of the plastic part, and the guide rail hook line head part is embedded into the inner side of the mounting groove in a clamped mode. The plastic part is embedded in the thread hooking head of the guide rail, so that friction and vibration between the guide rails in the operation process of the rotating shuttle can be effectively reduced, noise of the rotating shuttle of the sewing machine can be reduced on the premise that the service life of the rotating shuttle is not affected, and stability is improved.

A winding device for feeding sewing thread from at least two bobbins to a sewing machine, in particular an overlock or coverlock machine, characterized in that it comprises: (a) a base plate with a receiving opening for detachable attachment to a bobbin holder or thread disc of the sewing machine, (b) at least two winding units in the form of trays, each forming a receiving space adapted to the outer contour of the bobbin, wherein the bobbin is mounted in the respective tray to be rotatably axially free with radial and axial play, and (c) at least one thread guide element, which is positioned in such a way as to ensure that the thread is taken off the bobbins in a substantially vertical manner.

The utility model discloses a damping structure of a rotating shuttle frame, which comprises a shuttle frame main body, the shuttle frame main body is rotatably arranged on the inner side of a shuttle race in a limited manner, a shuttle frame shaft core used for mounting a shuttle core is arranged at the center of the inner side of the shuttle frame main body, and a rubber damping component used for damping is sleeved on the shuttle frame shaft core; according to the rotating shuttle, the O-shaped groove is designed in the shuttle frame shaft core of the shuttle frame, and the O-shaped rubber ring with the damping effect is arranged in the O-shaped groove in a clamped mode, so that it can be guaranteed that the shuttle core can be stably installed on the shuttle frame shaft core without shaking, and the damping and noise reducing effects can be achieved when the whole rotating shuttle runs.

To achieve a grease supply structure for a sewing machine hook which can suitably supply grease.SOLUTION: In a grease supply structure 100 for a sewing machine hook, an agitation member 11c can move in a grease storage part 11 to agitate grease G in the grease storage part 11 due to actions of a centrifugal force F1 caused by rotation of a shuttle race 1 and inertia forces F2, F3 caused by acceleration and deceleration of the rotation of the shuttle race 1 every time actuation and stop of a sewing machine are repeated. The agitation member 11c agitates the grease G in the grease storage part 11 to make the grease G hard to be separated so that a prescribed property is maintained. Thereby, the grease G is suitably fed out to the grease supply channel 12 from the grease storage part 11 by the centrifugal force F1 caused by the rotation of the shuttle race 1, and the grease G fed out to the grease supply channel 12 reaches a race groove 1a through a through-hole 5a of a core material 5, and the grease G can be suitably supplied to a sliding part (a race groove 1a, a race projection 2a) of a sewing machine hook 3.SELECTED DRAWING: Figure 1

Apparatuses, methods, and computer program products for quilting webs without compressing the webs. A quilting machine (10, 10a) includes a needle bar (160) to which needles (120) are attached, needle thread (284) passing through each needle (120), a looper shaft (188) to which loopers (282) are attached, a looper (282) corresponding to each needle (120) and from which looper thread (288) is provided to form stitches (530, 532), and a retainer bar (190) to which spreaders (191) are attached to facilitate stitching. A drive pulley (132) powered by a first servo motor (130) rotates cranks (156) to move the needles (120) through a cycle and rotates a belt (166) which rotates an indexer pulley (168). Rotation of the indexer pulley (168) oscillates the looper shaft (188) and reciprocates the retainer bar (190). Another drive pulley (48) powered by a second servo motor (40) operates to move an input web (22) through the machine (10, 10a) between chain stiches.