Deutsche Institute Fur Textilund Faserforschung Denkendorf

Ditf Deutsche Institute Fur Textil- Under Faserforschung

Deutsche Institute Fuer Textil- Und Faserforschung Stuttgart Stiftung Des Oeffentlichen Rechts

Global Safety Textiles Gmbh

Deutsche Institute Für Textil-Und Faserforschung Denkendorf Stiftung Des Öffentlichen Rechts

Christoph Riethmüller

Bastian Baesch

Gerd Stahlecker

Heinrich Planck

Gernot Schäffler

Helmut Weinsdorfer

Jörg Ruschulte

Holger Illg

Simon Hoinkis

Holder Illg

A sensor yarn () having a thread core () around which first and second conductors () are helically wound. The two conductors () are electrically insulated from each other and from the thread core (). The two conductors () form a capacitive component () together with the thread core (). In one embodiment, the sensor yarn () has a capacitance (Cl) per unit of length that changes in the direction of extent (E) of the sensor yarn. This can be accomplished by a change in the winding geometry of the first or second conductors () or by a change of the relative permittivity (E) of the sensor yarn (). In another embodiment, the sensor yarn () has photosensitive material () and a length change is effected by an incident to the light (L). As a result of a length change or other deformation of the sensor yarn (), the total capacitance (CG) of the sensor yarn () changes, which can be determined by means of an evaluating unit ().

Sensory yarn

An arrangement () for generating a light effect () includes an obscuration sheet material () and a divergence sheet material () arranged in spaced apart relation to a rear side () of an effect sheet material (). The obscuration sheet material () has at least one transmission region () and at least one shielding region (). On the light entry side (), which faces away from the effect sheet material (), light (L) impinges on the obscuration sheet material () and is severely reduced or completely shielded in shielding region (), while light (L) passes through the at least one transmission region (). By means of the divergence sheet material (), divergent light rays (LD) are produced at the corresponding transmission region (), which divergent light rays impinge on the rear side () of the effect sheet material () and generate a light effect () for a viewer () looking at the viewing side ().

Arrangement for generating light effects having a shadowing function

An overend take-off crosswound bobbin and a method for its production are designed in such a way that the density of the finished crosswound bobbin is increased and the run-off characteristics during further processing are optimized. For this purpose, in one variant parallel windings are introduced at intervals. In another variant, when the bobbin diameter is small the yarn is wound on at a smaller pitch angle than for a larger diameter. Furthermore, a traversing stroke which is reduced by comparison with the bobbin width is displaced along the bobbin width.

Crosswound bobbin and associated production method

A system for winding a cross-wound bobbin has a rotatably supported tube holder that is intended to receive a tube. The yarn guide element that serves the purpose of shogging the yarn moves in the direction parallel to the axis of rotation of the tube and is made to execute the oscillating reciprocating motion with the aid of a work cylinder. The work cylinder has the advantage that for braking the kinetic energy at the turning point of the yarn guide element, no additional external energy must be applied. It suffices for the applicable cylindrical chamber to be blocked off. Moreover, the gas compressed in the process can be used to accelerate the piston in the opposite direction. The stored braking energy also can be used simultaneously as acceleration energy. Since in the creation of a cross-wound bobbin many thousand such changes of direction occur, the energy savings are substantial.

Bobbin winding system

Growing community of inventors

Leonberg, Germany

Christoph Riethmüller