Abstract: An apparatus and a method for texturing blended synthetic multifilament yarns, wherein the blended yarns are each produced in parallel from a plurality of individual yarn components. The individual yarn components are withdrawn and drawn by a withdrawal means, with a guide means being associated to the withdrawal means for combining the individual yarns to the blended yarns. The blended yarns are separately textured, and to obtain for each of the blended yarns a combination of the individual yarn components that is as identical as possible, the individual yarn components are divided into groups, with each group being reciprocated by one of a plurality of individually controlled traversing yarn guides. The groups of the individual yarn components are guided independently of one another while being reciprocated, with each of the individual yarn components per group being respectively associated to the blended yarns.

Abstract: A bidirectional light waveguide communication system that has a light source preferably formed by a laser at one end of the light waveguide and a reflex transmitter at the other end of the waveguide with the reflex transmitter formed by a halved controllable optical directional coupler which has two strip waveguides that are terminated by a partially reflecting mirror and which has control electrodes which receive a transmission signal. An opto-electrical transducer receives the received light signal from both strip waveguides after the partially reflecting mirror.

Abstract: This invention relates to aliphatic or aromatic polycarboxylic acid esters as defined herein which are useful as base oils alone in lubricating oil compositions or in admixture with completely synthetic, partially synthetic, or mineral oil-based lubricant compositions.