Maschinenfabrik Rieter Ag

Andrew Barritt

Herbert Stalder

Daniel Brennwalder

Anton Wuest

Marcus Dinkelacker

A nozzle mechanism for generating a twist in a yarn in an air-jet spinning machine, the nozzle comprising a central cylindrical duct having an axis through which a yarn is delivered in a selected direction and a bore having an axis and a diameter entering tangentially into the cylindrical duct for inputting compressed air into the duct, the bore entering the duct such that the axis of the bore forms an obtuse angle with the axis of the duct, the bore further entering the duct such that the perpendicular distance between the axis of the bore and the point of tangential entry of the bore into the duct is less than half the diameter of the bore.

Nozzle for generating a twist in a jet spinning machine

The method and apparatus for supplying a reserve feed stock to a spinning machine or spinning position thereof, contemplates monitoring the operational state of a production feed stock and upon reaching a predeterminate operational state thereof, such as near depletion or depletion of the production feed stock, or even rupture thereof, bringing a reserve feed stock previously held in readiness into a production position where such reserve feed stock now assumes the role of a production feed stock. Consequently, downtime of the spinning machine or spinning position can be minimized and its operation at least partially automated since there is always available a reserve feed stock to allow for essentially continuous or continual production of a spun yarn or thread. One specific piecing technique uses a movable member for placement of a reserve feed stock into the travel path of a production feed stock such that piecing of these two feed stocks is reliably attained. Here the production feed stock may be separated by a clamping or cutting action or the terminal end thereof may be monitored so that the reserve feed stock can be pieced to a desired terminal end section of the production feed stock without the need for any separation operation.

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Lengnau, Switzerland

Andrew Barritt