Method and apparatus for inspecting articles
US4500203A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1982 |
| Grant date | Feb 19, 1985 |
| Priority date | — |
| Expiry date | Sep 30, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/245
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for inspecting glass containers for irregularities in shape, wherein the containers are moved, in line, on a conveyor past a viewing station where there are three strobed light sources positioned at one side of the conveyor. One light is at 90.degree. with respect to the conveyor while the other two are at 45.degree. angles on either side thereof. Between the lights and the container being inspected are positioned Fresnel lenses; solid state discrete array cameras are positioned behind Fresnel lenses mounted on the opposite side of the conveyor with their viewing axes directed toward the light sources. Each backlighted container is viewed by the three cameras simultaneously and provides a profile scan of the container at a plurality of planar elevations. These scans are processed and compared electronically with input data fed to a central processing unit. A second embodiment uses an anamorphic lens on each cameras which provides a convenient system for viewing tall bottles while also utilizing the full width of the viewing area by reducing the height to diameter ratio of the bottle image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.