| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 112254000 | Tensioning | 7 |
| 20080257243 | Thread tension device for sewing machine - A thread tension device includes paired thread tension discs holding a needle thread, a thread tension spring biasing one of the discs toward the other, a thread tension dial adjusting a tension exerted on the needle thread, a spring force adjusting cam formed in the thread tension dial, a transfer plate following the cam so as to be capable of adjusting the spring force, and a first adjusting member threadingly engaged with the transfer plate to receive one end of the thread tension spring, a thread guide assembly having a through hole formed so that the adjusting tool is insertable into the through hole, and a second adjusting member rotatably mounted on the transfer plate and engageable with the distal end of the adjusting tool inserted into the through hole so as to be rotatable with the tool, thereby rotating the first adjusting member by rotation of the tool. | 10-23-2008 |
| 20090165687 | THREADING TENSIONING DEVICE OF SEWING MACHINE - A thread tensioning device of a sewing machine for forming multiple types of stitches using a plurality of threads is provided. The thread tensioning device includes thread tensioners disposed to correspond to the threads, an adjusting mechanism coupled to the thread tensioners to select a stitch type and to simultaneously adjust the tensional force applied from each of the thread tensioners to the corresponding thread such that the tensional force is selected from reference tensional forces corresponding to the selected stitch type, fine adjustment mechanisms disposed to correspond to the thread tensioners and to be manually operable to finely adjust the tensional force applied from the corresponding thread tensioner to the corresponding thread, and a reset mechanism coupled to the fine adjustment mechanisms to resets at different timings and interlockingly with the adjusting mechanism an amount of the tensional force finely adjusted by each of the fine adjustment mechanisms. | 07-02-2009 |
| 20100307399 | Thread Tensioning Device for a Sewing Machine - A thread tensioning device for a sewing machine comprises a limit member fixed on the sewing machine, and an elastic pulling member mounted on the limit member. The pulling member includes an elastic extension portion which is movably disposed on the limit member. The pulling member further includes a free end formed with a hook-shaped thread pulling portion. The limit member is provided with two limit portions defining a space for passage of the thread. During a thread loosening operation, the thread will be moved within the space defined by the two limit portions while being pulled by the thread pulling portion of the pulling member, so that the thread pulling portion can provide a proper amount of tension to the thread timely, thus avoiding the occurrence of skip stitch and ensuring the sewing quality. | 12-09-2010 |
| 20120210924 | SEWING MACHINE - A sewing machine includes a needle thread tension control device including a fixed portion, a shaft having an external thread portion, a thread tension dial, first and second thread tension discs, and a spiral movement member. The spiral movement member includes an internal thread portion meshed with the external thread portion while being movable relative to the external thread portion in a spiral direction relative to the axis, and a scale including marks arranged serially and side by side in the spiral direction. The spiral movement member adjusts the needle thread tension by moving towards or away from the second thread tension disc while rotating in a circumferential direction by meshing between the external thread portion and the internal thread portion. The needle thread tension control device also includes a thread tension spring applying respective biasing forces to the spiral movement member and the second thread tension disc. | 08-23-2012 |
| 20150075414 | Tension Release Device for Compensating Mechanical Error of a Tension Device for a Sewing Machine - A tension release device for compensating mechanical error of a tension device for a sewing machine includes a rotary arm, a tension release shaft, a guiding member, an actuating member, and a micro-adjustment member, the rotary arm is located at one end of the tension release shaft which is inserted through the base, the tension release shaft is coupled to the guiding member, the guiding member is provided with an arc-shaped guiding flange which includes a first end and a second end higher than the first end. On the actuating member is provided a push portion which protrudes toward and is pushed by the guiding flange of the guiding member, a micro-adjustment hole is formed at one end of the actuating member or at the one end of the control shaft, and the micro-adjustment member is screwed in the micro-adjustment hole and extends toward the tension release shaft. | 03-19-2015 |
| 20160090675 | AUTOMATIC THREAD TENSIONING - A system and method are provided for selectively controlling a thread tension in a quilting machine. The thread tensioner is moveable to a reduced tension configuration in response to an actuator, wherein the actuator is sized to be located within an existing form factor. A controller can be connected to the actuator to regulate the thread tension in response to a sewing translation and a non-sewing translation of the sewing head relative to a workpiece. | 03-31-2016 |
| 20160108571 | THREAD TENSIONER FOR A SEWING MACHINE - Thread tensioner for a sewing machine. In one example embodiment, a thread tensioner for a sewing machine includes a first disk, a second disk, a spring, a mechanism, and a sensor. The second disk is positioned next to the first disk. The spring is configured to apply tension to a thread positioned between the first disk and the second disk by exerting a force against the second disk. The spring defines a first end, a second end, and a length between the first end and the second end. The mechanism is configured to cause the length of the spring to shorten and to allow the length of the spring to lengthen. The sensor is configured to track a current length of the spring by measuring a dimension of at least a portion of the spring. | 04-21-2016 |
