50results about "Sewing measuring devices" patented technology

A stitching apparatus with thread tension control is provided. Tension in a thread is monitored during stitching apparatus operations, and remedial action is taken in response to the detection of an anomaly in the thread tension profile. The remedial action can include altering a feed rate of the thread in order to adjust the thread tension, and / or repeating a previous operation. Anomaly detection can be performed with respect to stitching or sewing operations, and also with respect to trim operations performed in connection with moving between elements and / or thread color changes.

An apparatus for monitoring consumption of a supply of thread includes entry keys for allowing a user to input an initial supply of thread, and a minimum allowable supply of thread, and a detector for providing signals indicative of the rate of thread consumption. The apparatus also includes a control circuit for receiving the initial supply, the minimum allowable supply, and the signal indicative of the rate of thread consumption. The control circuit then calculates a consumed amount of thread and an actual supply of thread remaining, and produces a display signal indicative of the actual supply and / or the consumed amount, and an alarm when the actual supply of thread is equal to or less than the minimum allowable supply. The apparatus further includes a display panel for displaying the actual supply and the consumed amount upon receipt of the display signal from the control circuit.

A plurality of stitching machines and a control system used in stitching patterns into a plurality of items is capable of flexible control. The plurality of stitching machines may include one or more clusters of stitching machines, with each cluster able to stitch patterns into items independently of other clusters. Stitching machines within the plurality of stitching machines, or within the clusters of stitching machines, may be set to stitch patterns into items using one of a synchronized mode and an unsynchronized mode. When in the synchronized mode, the stitching machines perform stitching substantially synchronously with other stitching machines, and when in the unsynchronized mode the stitching machines perform stitching independently of the status of other stitching machines.

A sewing machine including a needle being supplied with an upper thread, a loop taker which accommodates a bobbin for a bottom thread, and a drive unit, which forces the needle to perform a reciprocating movement. The needle, during its movement and in cooperation with the loop taker, executes a stitch on a sewing material being advanced between the upper thread and the bottom thread. A take-up lever, for each stitch, pulls tight a knot being formed in the sewing material by the upper thread and the bottom thread in cooperation. The sewing machine further includes a thread transfer member supplying the needle with an upper thread with either a thread portioner or a friction braking assembly for friction braking of the upper thread. A switch switches between thread supply with the thread portioner or with the friction braking assembly. A control unit controls the thread supply from the thread portioner or, alternatively, controls the friction braking assembly.

A method and apparatus for detecting longitudinal thread motion in a quilting / sewing machine for controlling the actuation of a fixedly located stitch head. A preferred detector comprises an optical sensor which directly senses the longitudinal movement of a thread as it moves along a guide path from a supply source toward a stitch head needle.

A sewing machine including a needle that is supplied with an upper thread. A a reciprocating movement carries the upper thread through a sewing material and forms a loop beneath the sewing material. A shuttle houses a bobbin for lower thread and a shuttle arm catches the loop of the upper thread and carries the upper thread around the lower bobbin, so that a stitch is executed on the sewing material. A thread feeder feeds the upper thread to the needle and a control element on each stitch causes the thread feeder at the beginning of a stitch to advance a predetermined length of upper thread, including an excess thread, and at the end of the stitch to correct the length of the upper thread by recovering the excess upper thread, or advancing the further upper thread required.

A sewing machine, wherein holding members (46) and (48) for holding a thread hung on a needle thread take-up (17) to be swung at a position on the downstream side of the needle thread take-up and on the upstream side of the sewing needle fitted to a needle bar are provided in a sewing machine head. During the rest of operation of the sewing machine head, the movement of the thread on the downstream side of the needle thread take-up is stopped irrespective of whether the needle thread take-up is swung or not since the thread (T) is held by the holding members. The tip of the thread hung on the needle thread take-up is passed through the pin hole of the sewing needle fitted to the needle bar. When the needle thread take-up is swung, the hung thread is tensed or loosened according to the swing movement. However, since the thread is held by the holding members on the downstream side of the needle thread take-up in the sewing machine head in the rest of operation, the thread passed through the pin hole is not extracted from the pin hole even if the needle thread take-up is swung. By such a simple structure, the thread can be prevented from being extracted from the pin hole.

A thread supplying device includes a rotator feeding a thread downstream of a thread supply path, the rotator winding a periphery thereof the thread several times and locating in the path extending from a thread supply part to a needle and loopers, a stepping motor continuously drivingly rotating in one way the rotator in synchronism with the main shaft of a sewing machine, thread feed setting means setting a unit thread feeding amount necessary for formation of seams per stitch, and control means automatically controlling the rotation of the motor to feed the unit thread feeding amount set by the setting means for each formation of seams per stitch. This device can stably supply a predetermined amount of the unit thread, and achieve stabilization of stitch performance, irrespective of the type of the thread, and whether the feed of a fabric increases or decreases by a rapid change in the rotational speed of the sewing machine.

A method is provided for optimizing the yarn consumption in patterned textiles by applying cell automata algorithms to bitmapped-type pattern designs including operator selected rules to influence the general appearance of the pattern design.

An upper thread supply device includes a drive roller 50 and two slave rollers 52, 54. The slave roller 52 has a thread contacting portion 52a formed from a soft metal. The slave roller 54 has a thread contacting portion 54a formed from a resilient material. The drive roller 50 is formed from a hard metal. A thread is supplied by the upper thread supply device following a thread feed pathway. The drive roller 50 and the soft metal thread contacting portion 52a sandwich the thread at one position along the thread feed pathway and the drive roller 50 and the resilient thread portion 54a sandwich the thread at a separated position along the thread feed pathway. The resilient thread contacting portion 54a is positioned downstream from the position where the thread is sandwiched by the hard metal thread contacting portion 54a and the soft metal thread contacting portion 52a. The hard metal thread contacting portion of the drive roller 50 and the soft metal thread contacting portion 52a sandwich the thread and prevent it from being excessively drawn out from the thread spool by vertical movement of a thread take-up lever. The hard metal drive roller 50 and the resilient thread contacting portion 54a mainly reliably feed out the upper thread by sandwiching the upper thread there-between.

An automatic feeding device for shoe-making equipment, comprising a first fixed platform, a first groove is provided on the first fixed platform, two moving plates are arranged in the first groove, and the front and rear sides of the moving plate are in contact with the inner wall of the first groove. There is a limited guide device between them, the first fixed platform is connected to two electric push rods, the electric push rod is connected to the fixed plate, and the two fixed plates are connected to the same telescopic tube, there is a second fixed platform under the first fixed platform, and the second fixed platform There are two guide holes on the top, there is a guide rod in the guide hole, the guide rod is equipped with a tension spring, there is a rack under the second fixed platform, there is a transmission platform on the first fixed platform, there is a baffle on the first fixed platform, and the second fixed platform There is a wire amount detection device on the stage. The user only needs to place several shoe thread spools sequentially on the conveying table to use this device. The winding of the old shoe thread spools is separated from the guide shaft and placed simultaneously with the placement of the new shoe thread spools, which greatly shortens the The time required for shoe line barrel replacement is shortened, which in turn helps to improve the production efficiency of shoes.