Measurement of transparent container wall thickness
US5291271A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1992 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Aug 19, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for measuring sidewall thickness of transparent containers that includes a source for directing a light beam onto the outer surface of the container sidewall at an angle such that a portion of the light beam is reflected from the outer sidewall surface, and a portion is refracted into the container sidewall, reflected from the inner sidewall surface and then re-emerges from the outer sidewall surface. A lens is disposed between a linear array light sensor and the container sidewall for focusing light energy reflected from the outer and inner sidewall surfaces onto the sensor. The lens has an image plane in which the sensor is disposed and an object plane co-linear with the light beam. Electronics is responsive to light energy incident on the sensor for determining wall thickness of the container between the inner and outer sidewall surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.