Inspecting cans for openings with light
US4105122A · kind A · utility
16Cited by
4References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1976 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Nov 26, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S209/919
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Inspection is effected by clamping cans between a holder and a photosensitive device which holders and devices are disposed in opposed relationship in a plurality of sets, illuminating exterior of the cans to project light through any opening in the can to the photosensitive device, sensing such light and sending electrical signals to an electronic memory to sort good cans from leakers; the photosensitive device includes an array of directional photodarlingtons one group of which detects openings in can flanges and another group detects openings in can bodies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.