Patent classifications
D03D47/36
Delivery device for delivering yarns, method for determining the tension of yarns and use of control means for controlling actuators for delivering yarns
A delivery device with actuators for delivering yarns in a textile machine, controllers for controlling the actuators, which comprise produce measurement signals as a measure of the drive torque of the actuators, and monitors for monitoring the tensions of the yarns using the measurement signals. Additionally, at least one embodiment concerns a method for monitoring the tension of yarns which are delivered in a textile machine by means of actuators, comprising producing measurement signals as a measure of the drive torque of the actuators, which is a measure of yarn tension, and monitoring the tension of the yarns using the measurement signals.
BASE FABRIC, JET LOOM, AND METHOD OF MANUFACTURING BASE FABRIC
A base fabric, having a coefficient of variation CV1 (100standard deviation/average value) of 3.0% or less in a length direction of a weft-direction disintegrated yarn strength and a coefficient of variation CV2 (100standard deviation/average value) of 4.0 or less in a length direction of a weft-direction disintegrated yarn elongation.
BASE FABRIC, JET LOOM, AND METHOD OF MANUFACTURING BASE FABRIC
A base fabric, having a coefficient of variation CV1 (100standard deviation/average value) of 3.0% or less in a length direction of a weft-direction disintegrated yarn strength and a coefficient of variation CV2 (100standard deviation/average value) of 4.0 or less in a length direction of a weft-direction disintegrated yarn elongation.
WEFT INSERTION METHOD AND DEVICE IN WATER JET LOOM
A weft detection sensor is provided that detects a passage of a weft to determine a passage timing of a weft circulating around a storage drum, and a weft insertion method includes setting in advance a reference value of a set position arrival timing in association with a set arrival position, regarding the set arrival position and the set position arrival timing at which a leading edge of the weft reaches the set arrival position, and determining an actual value of the set position arrival timing from the passage timing determined in weft insertion during weaving, comparing the actual value with the reference value, and in a case where a deviation occurs between the actual value and the reference value, determining a correction amount of a set value of a weft insertion related device based on the deviation so that the deviation decreases.
Storage yarn feeder with braking organ and interchangeable elements
A storage yarn feeder includes a body having a portion or drum onto which winds a yarn forming at least one coil, the yarn coming from a reel, being provided with a braking organ cooperating with the drum to brake the yarn leaving the drum, the braking organ including braking features capable of cooperating with the yarn when the yarn detaches from the drum as it leaves the feeder and heads towards a textile machine. The drum includes a first and a second portion, the latter being capable of supporting the yarn and being separable from the first portion to be capable of being replaced, the first portion being connected to the body of the feeder.
WEAVING METHOD EMPLOYED BY MULTICOLOR WATER-JET LOOM
A multicolor water-jet loom has a first nozzle and a second nozzle, a water supply unit for supplying water to the first and second nozzles, length-measuring devices for storing wefts, locking pins for locking the wefts stored in the length-measuring devices, and grippers for gripping the wefts drawn out from the length-measuring devices. The water supply unit executes an operation to supply one of the first and second nozzles that has been paused for at least a predetermined period with preparatory water only for a preparatory water supply period, the preparatory water supply period including a point one pick before weft insertion is executed by the nozzle that has been paused for at least the predetermined period, in a state where the wefts are locked by the locking pins and gripped by the grippers.
Thread feeder of rotary drum type with detection of the density of thread present thereon
Accumulation-type thread feeder including: a body, which bears a rotary drum on which turns of thread from a spool are wound; a tension sensor for detecting value of tension of exiting thread and a detector for detecting thread quantity accumulated on the drum; a light-reflecting element on the drum or functionally associated therewith, such light generated by light a generator borne by a support arranged alongside the drum, the support associated with a detector to detect light reflected by the reflecting element, the reflected light varying as a function of the quantity of thread wound on the rotary drum, the detection allowing detection of such thread quantity. The detector is a light-sensitive member directly receiving the light reflected by the reflecting element along the entire surface of the drum, the member allowing determination of thread density on the drum.
Weft yarn measuring and storing device of a loom
A weft yarn measuring and storing device of a loom includes a drive roller, a support shaft, a support lever is turnably mounted to the support shaft, a feed roller that is rotatably mounted to the support lever and pressed to be contacted against the drive roller by a spring force so that the feed roller is rotated by rotation of the drive roller to pinch a weft yarn therebetween for feeding, and a storing drum that takes up and stores the fed weft yarn. The weft yarn measuring and storing device further includes a friction resistance imparting portion that imparts the support lever a friction resistance against turning of the support lever.
Weft yarn measuring and storing device of a loom
A weft yarn measuring and storing device of a loom includes a drive roller, a support shaft, a support lever is turnably mounted to the support shaft, a feed roller that is rotatably mounted to the support lever and pressed to be contacted against the drive roller by a spring force so that the feed roller is rotated by rotation of the drive roller to pinch a weft yarn therebetween for feeding, and a storing drum that takes up and stores the fed weft yarn. The weft yarn measuring and storing device further includes a friction resistance imparting portion that imparts the support lever a friction resistance against turning of the support lever.
STORAGE YARN FEEDER WITH BRAKING ORGAN AND INTERCHANGEABLE ELEMENTS
A storage yarn feeder includes a body having a portion or drum onto which winds a yarn forming at least one coil, the yarn coming from a reel, being provided with a braking organ cooperating with the drum to brake the yarn leaving the drum, the braking organ including braking means capable of cooperating with the yarn when the yarn detaches from the drum as it leaves the feeder and heads towards a textile machine. The drum comprises a first and a second portion, the latter being capable of supporting the yarn and being separable from the first portion to be capable of being replaced, the first portion being connected to the body of the feeder.