Patent ID: 7424800
Filing Date: 2008-09-16
Classification: B65H

Abstract:
1. Yarn cleaner for cleaning out defects from yarn, in the measuring head of which at least one yarn parameter is measured, wherein for the yarn parameter, cleaning limits are determined, the exceeding of which signals the presence of a defect in the yarn, for which purpose the measured values of the yarn parameter are compared with the cleaning limits and wherein intolerable defects are cut out from the yarn, characterized in that the yarn cleaner is set up for cleaning effect yarn ( 1 ) with at least one cleaning limit, wherein the effect yarn ( 1 ) is formed from an alternating arrangement end to end of webs ( 14 ) and of effects ( 13 ) consisting of predetermined thickenings, and wherein the at least one cleaning limit comprises either (a) at least one cleaning limit for web regions defining a predetermined uppermost value of the yarn parameter measured in web regions of the effect yarn which is less than a predetermined acceptable value of the yarn parameter for effect regions, (b) at least one cleaning limit for effect regions defining a predetermined lowermost value of the yarn parameter measured in effect regions of the effect yarn which is greater than a predetermined acceptable value of the yarn parameter for web regions, or (c) both the at least one cleaning limit for web regions which defines the uppermost value of the yarn parameter measured in web regions of the effect yarn and the at least one cleaning limit for effect regions which defines the lowermost value of the yarn parameter measured in effect regions of the effect yarn.