Process and device to identify differences in yarn tension
AssigneeAkzona Incorporated
InventorsHans-Joachim a'Brassard, Robert Kloss, Paul Ketzler, Johannes Wolz
Life of this patent
Estimating the term…
Abstract
A process and a device for detection of differences in yarn tension in a sheet of parallel yarn ends wherein the individual ends of the yarn sheet are deflected from a defined measuring plane, the extent of the deflection being measured.
Claims13
A process to identify differences in yarn tension in a traveling sheet of parallel yarn ends on a textile machine, especially a creel or a warper, wherein individual ends in the yarn sheet are equidistant from each other in a measuring zone, characterized in that the entire yarn sheet is deflected under identical conditions for individual ends from a general plane into another plane of a length limited in the direction of travel by the measuring zone and is returned to the general plane after the measuring zone, that individual ends are deflected in a specific sequence at a predetermined force in the measuring zone from said another plane, and that the extent of deflection is measured and used to determine the tension in each successive yarn end whereby operation of the textile machine can be monitored.
A device for determining differences in yarn tension in a sheet of parallel yarn ends on a textile machine which comprises at least two yarn deflecting bars, said yarn deflecting bars simultaneously acting to establish a measuring zone;
- a reed for guiding individual yarn ends in the measuring zone, in a direction transverse to the yarn sheet;
- a movable measuring carriage equipped with a yarn feeler movable along a line essentially or nearly perpendicular to the yarn sheet plane in the measuring zone, said feeler being biased towards the yarn sheet and having means for contacting the individual yarn ends in sequence to effect deflection of the yarn ends from the yarn sheet plane and the position of the feeler being determined by measuring means;
- and the measuring means being connected to means for indicating the tension of the individual ends thereby permitting control of the operation of said textile machine.
Dependencies are inferred from the claim text.