Industriewerke Karlsruhe-Augsburg Aktiengesellschaft

Harry B Miller

Gunter Jahrig

The winder includes pairs of rotatable chucks each supporting one or more bobbins. The two chucks of each pair include a top chuck and a bottom chuck operatively associated with a common drive roll, although the chucks may be driven otherwise. A traverse housing extends parallel to the chucks and has respective traverse guides for each bobbin. A yarn pickup or pusher is mounted on the housing for displacement longitudinally thereof by a cable cylinder. A respective yarn transfer device is associated with each chuck for swinging about the axis of the chuck between the retracted position and a yarn transfer position. Each device includes a bar or tube extending parallel to the associated chuck throughout substantially its entire length. While yarn packages are being wound at high speed on one chuck of each pair, the other chuck is in a retracted standby position. When the packages are nearly fully found, the standby chuck is brought up to speed, the yarn pusher disengages the yarns from the traverse guides and moves the yarns to the starting ends of bobbins on the standby chucks, and still rotating full packages are retracted from the drive roll. The transfer device of the standby chuck then swings its arm between the full packages and the drive roll to the transfer position to engage the yarns and move them to pick-up grooves at the starting points of the bobbins on the rotating standby chucks, where the yarns are caught by clamps or hooks, with the yarns then being severed. The yarn pusher then releases the yarns into the traverse guides, for winding on the standby chuck bobbins, the transfer device is retracted, and the full packages on the other chuck are removed and replaced by empty bobbins.

Mechanism and method for transferring yarn from a full package to an

The yarn to be transferred is fed at high speed through a traverse mechanism and between a drive roll and a bobbin mounted on a first chuck and rotated by the drive roll to cross-wind a yarn package. An empty bobbin is mounted on a second chuck parallel to the first chuck. When the package is substantially full wound, the empty bobbin is engaged with the drive roll and the yarn package is retracted to provide a clearance space between the package and the drive roll. A transfer rod on the free end of an arm pivoted on the traverse mechanism, and extending parallel to the drive roll, is swung through the clearance space to engage the yarn and draw a loop to toward the rotating empty bobbin, and the package is then reengaged by the drive roll for continued high speed rotation to maintain tension on the drawn loop while the transfer rod draws the yarn loop against and beyond the empty bobbin. A yarn pickup and transfer device disengages the fed yarn from the traverse mechanism and moves the yarn axially of the transfer rod and into a slot therein aligned with the starting end of the empty bobbin, for catching and severing of the yarn by a hook with the yarn clamped to the second chuck. The full package is retracted from the drive roll and the transfer rod is swung back into its inactive position, with the pickup and transfer device effecting reengagement of the yarn in the traverse mechanism for cross-winding on the empty chuck. The pivoted arms are operated by rotary actuators and the transfer rods engage respective stops at the ends of their yarn drawing movements. The pickup and transfer device is operated by a fluid pressure linear actuator but may be operated by an electric stepping motor supplied by an adjustable inverter, and such an arrangement may also be used to swing the transfer rods. The chucks may be rotated by fluid pressure operated turbines.

Method and aparatus for transferring yarn on a nearly full package to an

The device provides for winding much larger yarn packages on each of a pair of vertically spaced yarn winder chucks on one side of a common drive roll and displaceable alternately in respective slots of a front wall of the yarn winder into engagement with the drive roll for winding of yarn packages and bobbins on the chucks. An adjustable length arm is swingably mounted, through an anti-friction bearing, on a motor drive shaft extending through the front wall midway between the chuck slots and outwardly of the retracted positions of the chucks, and a small diameter pulley is rotatably mounted on the free end of the arm. A larger diameter pulley is fixed to the drive shaft, and a belt is trained around both pulleys. A pair of solenoids, having armatures spring biased outwardly, are aligned in opposition and their armatures engage a fin projecting from the pivot end of the arm to bias the arm to a neutral position in which the belt is out of the paths of movement of the chucks. While yarn packages are being wound on bobbins on one chuck, the idle chuck is moved past the incompletely wound packages to a standby position adjacent to, but out of contact with, the drive roll. Upon signal, one solenoid is energized to retract its armature and the other armature swings the arm to engage the belt portion trained around the small diameter pulley with the idle chuck. The drive motor is then energized to gradually accelerate the idle chuck to a peripheral speed substantially synchronized with that of the drive roll, after which the thus accelerated chuck is moved to engage its bobbins with the drive roll. Thereafter, the one solenoid and the motor are de-energized, and the device is biased to its neutral position. As the belt is driven only intermittently for short periods of time, belt wear is greatly reduced.

Device for accelerating yarn winder chucks

The mechanism provides for winding much larger yarn packages of each of a pair of vertically spaced chucks on one side of a common drive roll and displaceable alternately horizontally into engagement with the drive roll for winding of yarn packages on bobbins on the chucks. A belt is trained around the drive roll and around an adjustably mounted small diameter pulley located between the two chucks. When a package has begun to be wound on a bobbin on one chuck by rotation by the common drive roll, the other chuck is moved inwardly, from a retracted position, past the partially wound package to a standby position in which it is adjacent but out of contact with the belt. As the package nears completion, the standby chuck is engaged with the 'soft' part of the belt, between the drive roll and the pulley, and accelerated to bring its peripheral velocity into substantial synchronism with that of the drive roll. When the package has been substantially completely wound, the standby chuck is engaged directly with the part of the belt in contact with the drive roll, and the yarn is transferred from the package to the bobbin on the standby chuck for winding of a new yarn package. As no clearance is required for the standby chuck to be brought past the fully wound package, the package can be wound to a much larger diameter. The mechanism is applicable to a high speed winder including two pairs of chucks, each with a common drive roll, with the pairs of chucks disposed on opposite sides of a traverse mechanism support.

Standby chuck operating mechanism

A drive roll has an axis of rotation and at least two rotatable chucks are provided, each being adapted to have a yarn package formed thereon. The chucks each have an axial end and are movable into and out of driven engagement with the drive roll. A traversing arrangement traverses a running yarn which is being wound onto one of the chucks, in order to form a yarn package thereon. A yarn transfer arrangement effects automatic transfer of the running yarn from the one chuck upon forming of the yarn package thereon to the empty other chuck while the latter is in driven engagement with the drive roll. This arrangement includes an arm which is mounted on the drive roll to be turnable about the axis of rotation of the latter and which has a free end portion arranged to travel in a path adjacent the axial end of the other chuck and intersecting the axis of rotation of the other chuck while the same is in engagement with the drive roll.

Winder for yarn and the like

The mechanism is used with a yarn winder having a traverse guide box or housing, a traverse guide and chucks, drive rolls, and control rollers for rotating yarn package supports, such as bobbins or tubes, and provided with a yarn catching device, such as a peripheral groove or hook, adjacent one end of the package supports, with the traverse guide cross-winding yarn packages on the supports. The yarn strung up in the winder, under a tension tending to move the yarn into a traverse guide, is caught in a guide member, while restrained from entering the traverse guide, and the yarn is moved by the guide member into a position aligned with a yarn catching device for catching of the yarn which is then broken or cut. The yarn is then moved in the guide member axially of the package support to wind a few turns therealong as a transfer tail, after which the yarn is released from the guide member to enter the traverse guide for cross-winding to form the yarn package. In two embodiments of the mechanism, the yarn guide member is a metal frame formed with yarn guide slots open at one end, with the yarn movement along a slot being controlled by a control element controllably reciprocable along the slot. In a third embodiment, the yarn guide member is formed by oscillatable arms, reciprocable as a unit longitudinally of a package support, in association with a yarn deflector for restraining the yarn from entering the traverse guide.

Mechanism for forming transfer tails on wound yarn packages

A device for the axial spacing of spool tubes along a common spool carrier, comprising a rotatable cylindrical spool carrier which has a periphery with a recess therein which accommodates a device which permits passage of a first spool tube over the carrier to a position at which the first spool tube abuts against a stop. The device thereafter projects outwardly from the periphery of the spool carrier behind the first spool tube so as to prevent the second spool tube placed on the carrier from moving further toward the first spool tube and thereby maintains a spacing between the two spool tubes. The spool carrier also carries a recess in the periphery thereof at the location between the two spool tubes which comprises a means for catching the thread which is to be wound.

Growing community of inventors

Charlotte, NC, United States of America

Harry B Miller