Gap measuring apparatus and method
US5796856A · kind A · utility
4Cited by
13References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1997 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Apr 8, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/901
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method to measure a gap width distance, specifically the distance between the lip of a coating hopper and the tangential edge of a coating roller or the support on the roller, is disclosed herein. The apparatus includes a long range microscope coupled with a CCD camera to provide a computer with an image. From this image the computer calculates first and second derivatives of the light intensity values between each pixel and determines the pixel locations of the two edges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.