摘要:
An automatic thread trimming method and apparatus are provided for tack and jump sewing of fabrics. In a preferred embodiment, a quilting apparatus having a plurality of sets of, preferably, double lock chain stitch forming elements, is disposed on a mechanically linked mechanism in a reconfigurable array corresponding to an array of discrete patterns to be sewn. Each set of the array is equipped with a thread trimming element. In a preferred embodiment, a thread trimming cutting edge is formed on one surface of a thread stitch forming element, preferably on a revolving retainer element that is mechanically linked to the mechanism. When operated in a forward direction, a chain stitched pattern is sewn with the stitches formed in cooperation with the retainer revolving in a forward direction. Upon completion of the pattern, the mechanism is reversed for half of a cycle to bring the cutting edge against a thread, the thread tension is released, the fabric is advanced to pull the thread, the thread tension is reapplied to cause the thread to be cut, and the fabric is positioned for the start of a new discrete pattern.
摘要:
An improved apparatus for determining the position of a drive rod within the interior of a drive rod housing includes a transmission antenna at one location on the housing and a receiving antenna at another location on the housing. An electromagnetic excitation signal sent to the transmission antenna is detected, at least in part, by the receiving antenna, and the received signal is processed with a vector network analyzer routine to model the drive rod housing as a wave guide having a filter response. A group delay is detected and is compared with a calibration data set which provides a current position of the drive rod that corresponds with the group delay.
摘要:
A multi-needle chain-stitch quilting machine and method of operation thereof are provided that imparts relative motion between the needles and the material that is controlled so as to pull needle thread tails from the needle side of the quilted material. The feature of controlling thread tails may be optional to provide selection of either a high speed mode of operation without thread tail control or a quality mode of operation with reduction or removal of needle thread tails from the face of the quilted material. Thread trimmers may be included at each needle location on the looper side of the material to cut both needle and looper threads.
摘要:
A multi-needle quilting machine is provided with a common drive that drives the needles and loopers. It may also drive the presser foot assembly. In the illustrated embodiment, a drive motor drives a rotating drive shaft. The drive shaft has an off-center drive assembly connected to it that rocks a needle rocker shaft as well as looper rocker shafts, and also a presser foot shaft. The off-center drive includes a pair of eccentrics on the drive shaft at each side of the machine. Each eccentric oscillates a linkage plate that is fixed to a shaft such as the needle rocker shaft and is also linked to the looper rocker shafts and the presser foot shaft. The eccentric thereby reciprocates the needles and oscillates the loopers, as well as reciprocates the presser foot plate, in permanent synchronization.
摘要:
An in-core neutron monitor that employs vacuum microelectronic devices to configure an in-core instrument thimble assembly that monitors and wirelessly transmits a number of reactor parameters directly from the core of a nuclear reactor without the use of external cabling. The in-core instrument thimble assembly is substantially wholly contained within an instrument guide tube within a nuclear fuel assembly.
摘要:
An in-core neutron monitor that employs vacuum microelectronic devices to configure an in-core instrument thimble assembly that monitors and wirelessly transmits a number of reactor parameters directly from the core of a nuclear reactor without the use of external cabling. The in-core instrument thimble assembly is substantially wholly contained within an instrument guide tube within a nuclear fuel assembly.
摘要:
A multi-needle chain-stitch quilting machine and method of operation thereof are provided that imparts relative motion between the needles and the material that is controlled so as to pull needle thread tails from the needle side of the quilted material. The feature of controlling thread tails may be optional to provide selection of either a high speed mode of operation without thread tail control or a quality mode of operation with reduction or removal of needle thread tails from the face of the quilted material. Thread trimmers may be included at each needle location on the looper side of the material to cut both needle and looper threads.
摘要:
An improved apparatus for determining the position of a drive rod within the interior of a drive rod housing includes a transmission antenna at one location on the housing and a receiving antenna at another location on the housing. An electromagnetic excitation signal sent to the transmission antenna is detected, at least in part, by the receiving antenna, and the received signal is processed with a vector network analyzer routine to model the drive rod housing as a wave guide having a filter response. A group delay is detected and is compared with a calibration data set which provides a current position of the drive rod that corresponds with the group delay.
摘要:
An apparatus for cutting a quilted material web having a quilted patterns thereon into panels having a desired length and width with respective quilted patterns centered therein. A first detector detects a center of a quilted pattern on the quilted material web; and in response thereto, a cutting apparatus cuts the quilted material web to form edges of a panel equidistant from the quilted pattern center. The cutting apparatus includes a pair of trim blades that cut opposite side edges of the panel equidistant from the quilted pattern center and a cross cutting apparatus that cuts end edges of the panel equidistant from the quilted pattern center.
摘要:
A multi-needle quilting machine (10) and method in which provided bridges (21,22) are provided having selectively operable stitching element pairs (90). Either the material or the bridges or both may be moved relative to the frame. Control schemes are provided to quilt continuous patterns, discrete patterns, linked multiple patterns, 360 degree patterns, closely spaced patterns. A plurality of small presser feet (158) are provided, each for one or more needles (132), with a wide spacing for material passage between the needle and looper plates. Combinations of intermittent and continuous feed and feed transition are employed during tack sequence sewing and other direction reversals in sewing, as well as double needle guards and thread deflection.