Yarn sluice for sealing a pressurized yarn treating chamber

Yarn sluice for sealing a pressurized yarn treating chamber in which a traveling yarn is thermally treated, the yarn sluice comprising:

• yarn guides in the region of a yarn inlet opening and a yarn outlet opening of the yarn treating chamber, each yarn guide including first and second yarn guide elements (26, 27) forming a yarn guide channel (25) which is sealed by the traveling yarn in the operating state,
• at least one of the yarn guide elements of each yarn guide being positionable for adaptation to the mean thickness of the traveling yarn in various predetermined positions,
• each yarn guide having means which allows temporary adaptation of a cross-section of the yarn guide channel to yarn defects,
• at least one of the first and second yarn guide elements (26, 27) of each yarn guide forming the yarn guide channel (25) being steplessly adjustably mounted for adaption to the mean thickness of the traveling yarn (14), and
• each yarn guide having a sealing element (28), which can be placed on the first and the second yarn guide element (26, 27), extending along the yarn guide channel (25) for closing the yarn guide channel (25) and for reacting resiliently to defects in the traveling yarn (14).