Rieter Machine Works, Ltd.

Maschinenfabrik Rieter Ag

Ruedi Schneeberger

Peter Busenhart

Erwin Holbein

Armin Wirz

Adolf Flueli

Hansueli Maier

Heinz Mutter

Felix Graf

Kurt Schefer

Heinz Oswald

Andreas Schwander

Georg Symon

Beat Horler

Necati Ari

A thread winder includes a revolver on which two radially spaced mandrels are disposed for supporting thread-receiving tubes. Thread is wound onto one of the tubes located in a winding position and, when that tube is filled, the thread is transferred to the other, empty tube without interrupting the thread feed, by rotating the revolver. After the filled package is moved out of the winding position, a deflecting rod is swung to deflect the thread to a position where it can be grabbed by a transferring device. Then, the deflecting rod is swung away from the thread, and the transferring device is swung out to displace the thread toward a thread catcher disposed on the empty tube (or its mandrel), whereupon the thread is severed. A thread diverter is also swung out from the transferring device to shield the empty tube from the trailing end of the severed thread extending from the filled package.

Method and apparatus for transferring a thread from a full package to an

There are disclosed one-piece chuck structures for use in winding machines and particularly, but not exclusively, for use in high speed winding machines for the take-up of synthetic plastics filament. These one-piece chuck structures comprise a first elongated tubular portion adapted to receive one or more bobbin tubes and a second elongated tubular portion integral with the first elongated tubular portion and of reduced external diameter relative thereto. Bearings cooperate with the exterior of the second elongated tubular portion such that the first elongated tubular portion and the second elongated tubular portion are rotatable about a common longitudinal axis. Also disclosed are hollow bobbin tube-engaging elements as well as double-arm tube-positioning members which can be used with such and other chuck structures.

Chuck structure

Method of mounting chuck structures

A chuck for a winding machine has a tube gripping system with rubber or elastomeric springs which generate a bias to press tube gripping elements against the internal surface of a bobbin tube.

Tube gripping system for a winder chuck

A chuck is adapted to be cantilever-mounted for rotation about a longitudinal axis thereof in a winding machine for threads, such as synthetic plastics filament, glass fiber strands and so forth. The chuck comprises a chuck member and an element movable radially thereat between retracted and extended positions under the action of centrifugal force when the chuck is rotated about its longitudinal axis at or above a predeterminate operating speed in use. The element has a head portion which projects radially outwardly from the bobbin tube receiving surface of the chuck member of the chuck when the element is in its extended position, and is located inwardly of such bobbin tube receiving surface when the element is in its retracted position. The head portion either includes a thread-catching device adapted to receive and catch a thread to secure the thread to the chuck member for winding into a package thereon or is adapted to co-operate in use with a part carried by the chuck member in order to form such a thread-catching device.

Thread-catching device for winding machines

An actuating system for a bobbin tube gripper comprises resilient structure held in compression in order to create a force for urging tube gripping elements into engagement with a tube to be gripped. The resilient structure constitutes a body of a porous elastomer.

Actuating system for a bobbin tube gripper

Winding of threads into cross-wound packages is effected by a moving traverse mechanism of a main traverse mechanism by which the thread is laid on to the package. The thread runs in a preliminary traverse mechanism between two elongated guide members which form therebetween a gap. The thread extends transverse to the guide members. The thread is additionally influenced by the preliminary traverse mechanism by means of air streams flowing in the longitudinal direction of the gap, these air streams being controlled with respect to timing. In this way, the thread is relatively uniformly tensioned, so that the operation of laying the thread into the package can be performed by the main traverse mechanism with greater precision. In the preliminary traverse mechanism, the thread practically does not come into contact with any fixed components, since no such components are required for its guidance and within the gap the thread is located in a kind of air cushion. Thus the thread is treated gently while there is no wear of moving parts in the preliminary traverse mechanism.

Method and apparatus for forming cross-wound packages

Method and apparatus for inserting threads and similar items into a

The invention deals with problems arising in lubrication of the helical cam grooves of cam drums used in thread traversing mechanisms of winding machines. The drum is provided with an internal space acting as a lubricant reservoir. A passage extends between the space and the groove so that centrifugal force urges lubricant outwardly along the passage from the space towards the groove. Flow along the passage is controlled by a porous sintered metal body which permits a desired degree of a given lubricant to pass along the passage at a given rotational speed.

Growing community of inventors

Seuzach, Switzerland

Ruedi Schneeberger