Process and device for texturing at least one endless filament yarn

A process for operating an apparatus for the texturing of at least one filament of yarn, the apparatus including a yarn duct having an axis and a compressed air supply, a texturizing chamber, and a deflecting member proximate the texturizing chamber, the yarn being taken off from the texturizing chamber transversely to the duct axis, whereby the yarn duct and the deflecting member together form a yarn path and define a direction of travel of the yarn from a yarn supply side of the yarn duct to a side of the yarn duct at which the yarn is transversely taken off, the process including the steps of

• a) providing a slide plate defining a part of the duct, the slide plate being displaceable along a path transverse to the duct axis;
• b) displacing the slide plate in a first direction for clearing the yarn path including a take-off portion proximate the texturizing chamber, said displacing in the first direction resulting in a threading position;
• c) threading the filament of yarn through the duct and the texturizing chamber including along the cleared take-off path portion;
• d) displacing the slide plate in a second direction substantially opposite to the first direction for enclosing the filament of yarn in the yarn path including the take-off path portion, said displacing in the second direction resulting in an operating position;
• and
• e) texturing the filament of yarn, wherein in the first direction displacing step, the entire yarn path is cleared in the region of the yarn duct and the texturizing chamber for threading and in the second direction displacing step, the entire yarn path is enclosed in the region of the yarn duct and texturizing chamber for texturing.