Memminger-iro Gmbh

Scheller Gmbh & Co. Kg

Eberhard Leins

Hermann Schmodde

Richard Kaufmann

Attila Horvath

Gunter Leopold

Friedrich Weber

Josef Fecker

Alfred Lampprecht

Ludwig Ketterer

The yarn feeder device () of the invention has one or more yarn feeler levers (), which are movably supported on the housing (). The yarn feeler lever () is movable between an operating position I and a response position II. In the operating I, its crossbar () which forms the yarn feeler means is approximately in the same line as yarn guide elements, such as the struts () of yarn guide bails (). Somewhat above its operating position I, the yarn feeler lever () meets a stop, past which it is not moved by the yarn (). To improve the accessibility to the yarn guide elements () particularly when yarn is being inserted and threaded in, the stop of the yarn feeler lever () is embodied as yielding. The yarn feeler lever () can therefore be moved upward manually past the stop on its lower end (), in order to open up the space enclosed between the yarn guide elements ().

Thread feeding device comprising a spring stop for thread detectors

The bearing device is formed of a bearing seat, a roller bearing, and a squeeze element. The squeeze element rests over a large surface area on the outer ring of the roller bearing and rests only regionally on corresponding regions of the bearing seat. The regions are preferably linear or striplike and are oriented substantially axially. This facilitates the insertion and removal of the roller bearing into and out of the bearing seat and prevents rotation of the outer bearing ring even if the bearing seats are provided with relatively generous tolerances.

Bearing system, especially for yarn feed devices

The yarn feeder of the invention has one or two yarn feeler levers, which monitor the yarn. In order to be able to prevent the monitoring if needed, a feeler barrier is provided. Its actuating device which in the illustrated embodiment is in the form of a handle, is disposed on an outer end of the basic body of the yarn feeder so that it is readily accessible to operators. The position set can also easily be seen from the position of the handle.

Yarn feed device having a feeler stop

A yarn feeder has a yarn feed wheel, which preferably comprises ceramic or is coated with a corresponding material. The yarn feed wheel, because of the choice of its material or its shaping, has improved long-term operation properties. The geometry and/or the material has low susceptibility to wear. This is attained by means of ceramic surfaces and/or the combination of a conical, continuous yarn inlet surface with adjoining striplike bearing faces in the yarn storage region and a continuous, that is, uninterrupted surface in the yarn payout region; the surfaces are shaped such that the yarn, along its way from the inlet region into the payout region, sweeps over the corresponding surfaces over the entire axial course. The striplike supporting or bearing of the yarn in the yarn storage region is attained by suitable shaping of the yarn feed wheel in the yarn storage region. Openings or slits or the like in the yarn feed wheel are not necessary but may be provided.

Yarn feeder for textile machines

A yarn brake having two disklike or platelike brake elements pressed resiliently against one another has a substantially U-shaped bail (19) with two legs extending in spaced apart fashion an either side of the brake elements. Pinlike bearing means for the brake elements are secured to this bail by means of at least one bearing part receiving them, which part is embodied on or joined to at least one of the bail legs. At least one of the brake elements has a central opening, through which the bearing means extend.

Yarn brake

A yarn feeder device for feeding elastic (soft) yarns to a yarn consuming station whose yarn demand fluctuates over time. The device has a control unit which ascertains the current yarn demand or to which the current yarn demand is reported. In accordance with this demand, a yarn feed wheel is driven at a rotary speed suitable for the yarn demand. The yarn travels via a tensioning device to the yarn feed wheel. The tensioning device is arranged such that the yarn is stretched in a defined way. As a result, a fixed association between a desired yarn feed quantity and the rotary speed of the yarn feed wheel is enabled.

Positive feed mechanism for elastic yarns

A yarn feeder intended particularly for flatbed knitting machines and elastic yarns has a yarn tension sensor which is provided with a calibration device. This device lifts the yarn from a peg that is part of the yarn tension sensor, at times in which this can be done without impairing operation of the yarn feeder. Such times are preferably time slots when no yarn feeding is necessary. Once the yarn has been lifted from the peg, a zero point calibration is performed. Zero point drifting of the entire sensor system, including its measurement circuit, can be detected and compensated for.

Yarn tension sensor with improved calibration

Yarn supply apparatus with electronic control

The winding heads of a bobbin-winding machine are provided with automatic bobbin exchange capability through the use of an indexable magazine which carries multiple interchangeable spindle units. The spindle units engage bobbins and, in turn, are adapted to be engaged by a rotary drive mounted on a transfer arm. The transfer arm moves individual spindle/bobbin combinations between the magazine and the bobbin-winding position after engagement with the rotary drive. Disengagement of a spindle/bobbin combination after winding and return to the magazine permits automatic exchange with a spindle carrying an empty bobbin.

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Horb, Germany

Eberhard Leins