Memminger-iro Gmbh

Hermann Schmodde

Eberhard Leins

Richard Kaufmann

Attila Horvath

Josef Fecker

Gunter Leopold

Friedrich Weber

Alfred Lampprecht

Christoph Worner

Ludwig Ketterer

Falk Kühn

Gerhard Park

Atila J Horvath

Eberhardt Leins

A yarn lifting element (), which is provided on a positive thread regulating wheel, comprises straight yarn-bearing surfaces () whose position cannot be displaced by the yarn (), enabling the yarn to slip in relation to the thread feeding wheel () when required. Said additional measure enables the positive thread regulating wheel to be used in areas which were previously excluded on account of the required synchronicity between the feeding of the thread and the consumption of the thread.

Yarn feeding device

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

A modular yarn feeder having a basic carrier on which additional modules can be secured as needed by suitable coupling devices. This makes the yarn feeder more adaptable to different kinds of use and different situations.

Thread-feed device, comprising an adjustable thread-guide unit

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

Yarn feeding device for textile machines

A vibration friction feed wheel mechanism for feeding thread to a thread processing machine having intermittent thread requirement. The feed wheel mechanism including a high friction contact surface, a thread guide level for lifting thread off of the feed wheel and a vibration generating arrangement for applying a vibrational movement to the thread. The vibration of the thread ensures that the thread lifts-off from the contact surface of the friction feed wheel by reducing the coefficient of friction between the thread and the high friction contact surface of the friction wheel.

Friction feed wheel mechanism with vibration excitation

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, which has a yarn feed wheel connected to an electric motor for positive feeding of a yarn as needed, has a yarn travel path which is defined by yarn eyelets at an angle to the pivot axis of the yarn feed wheel that is greater than the sum of 90.degree. and an additional acute angle. This additional acute angle .alpha. is greater than the angle of inclination of a yarn lap on the yarn feed wheel in which adjacent windings contact one another. As a result, a smooth payout of the yarn on the yarn feed wheel is obtained.

Yarn feeder with improved yarn travel

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

Thread feed device for elastic yarn

Yarn supply apparatus with electronic control

A yarn supply apparatus is equipped with a clutch arrangement in order to couple a drive wheel to rotate with a yarn supply wheel as necessary. The clutch arrangement is constructed in an open design, in which any development of narrowing spaces is avoided. For this purpose one clutch half is provided with axial fingers, which engage in radially open longitudinal slots, formed by a toothing, of the other clutch half. The slots of the toothing are longer than the engagement length between fingers and toothing. The intermediate space formed between the ends of the fingers and the nearest wall in axial direction is open in radial direction or is in communication with a larger inner space. Thereby the compression or compaction of deposited fluff is prevented.

Yarn supply apparatus and clutch arrangement therefor

A plate-type thread brake includes two brake elements pressed resiliently against each other by a load device and receiving the thread passing through between them. These brake elements are eccentrically suspended on bearings on the inside wall of a central opening which only fill out a small part of the opening. Thread guides are also arranged in the region of this central opening.

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Horb-Dettlingen, Germany

Hermann Schmodde