Process for monitoring crimped material
US4460921A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1982 |
| Grant date | Jul 17, 1984 |
| Priority date | — |
| Expiry date | Oct 27, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/2518
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a method of monitoring planar sections of material having generally parallel crimps, the material having a longitudinal dimension extending generally perpendicular to the crimps and a transverse dimension generally parallel to the crimps. The material, such as a bundle of crimped fibers or tow, generally defines a plane, and the method comprises PA1 (a) illuminating the material along a line generally longitudinally of the material and over a plurality of the crimps by causing a plane of light, or the plane defined by sweeping a ray of light, to intersect with the surface of the material at an angle of between about 30.degree. and about 60.degree. with the plane of the tow when viewed along the tow band, such that the light intersecting the crimped material produces a generally zig-zagged line of illumination when viewed from an angle other than that of the light source, the peaks and valleys of which illustrate the profile of the crimped material, and PA1 (b) recording the pattern of the generally zig-zagged line from an angle relative to the material different from the plane of light such that the profile of the material can be determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.