Lawson Hemphill, Inc.

Testing Machines, Inc.

Steven Leary

Filiz Avsar

Dean A Ross

Kendall W Gordon

Kendall W Gordon, Jr

Avishai Nevel

A yarn entanglement strength tester includes first and second rolls that apply incrementally increasing elongation levels on a yarn in order to remove entanglements from the yarn. The yarn entanglement strength tester also includes a third roll, where the second and third rolls apply a constant tension on the yarn which enables optimum diameter measurements of the yarn by a camera. The camera captures images of diameters of the yarn after each of the incrementally increasing elongation levels is applied to the yarn. The yarn entanglement strength tester further includes a computing device that controls operation of the camera and the first, second, and third rolls, and determines an entanglement strength of the yarn based on the captured images of the diameters of the yarn after each of the incrementally increasing elongation levels is applied to the yarn.

Yarn entanglement strength tester

A computer-controlled device for determining relative yarn hairiness. Yarn is moved past a light source to create a yarn shadow, and an imaging device captures the yarn shadow. The imaging device includes a number of separate, closely-spaced light sensing elements, each with an output level related to the amount of light shining on the element. A selected sensing element output level is established as indicative that an element is blocked by the yarn. The width of a number of closely-spaced portions of the yarn is determined, at two different selected sensing elements output levels, to distinguish the yarn hairs from the yarn core.

System and method for determining yarn hairiness

Growing community of inventors

Berkley, MA, United States of America

Steven Leary