Method for determining the length of filamentary materials, such

Details Method for determining the length of filamentary materials, such Method for determining the length of filamentary materials, such

1982-11-29

1984-05-15

Haroian, Harry N.

Geometrical instruments

Area integrators

Electrical

33172F, 242 36, 242 39, G01B 1904

Patent

active

044479557

ABSTRACT:
During the measurement of the length of filamentary materials, for instance a yarn, which is wound into a cross-wound package which is driven by a grooved drum, appreciable errors arise because there is not taken into account slippage. Therefore, with the present method during the winding operation the slip, which is governed by the relationship of the circumferential velocities of the grooved drum and the cross-wound package, is continuously measured in successive time intervals, and there is undertaken a correction of the yarn length determined without taking into account the slip. Thus, sensors continuously measure the rotational speeds of the cross-wound package and the grooved drum, and an angle measuring device determines the diameter of the cross-wound package, these measuring results then being inputted to an evaluation circuit. In the evaluation circuit there is computed the slip and such is incorporated into the length measurement.

REFERENCES:
patent: 4024645 (1977-05-01), Giles
patent: 4330094 (1982-05-01), Mayer
patent: 4373266 (1983-02-01), Stutz

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