Apparatus for detecting an aqueous liquid in bottles and containers
US4368980A · kind A · utility
Inventors
Key dates
| Filing date | Jun 23, 1980 |
| Grant date | Jan 18, 1983 |
| Priority date | — |
| Expiry date | Jun 23, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0813
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to apparatus for detecting water-based residues in translucent bottles, in which energy in two parts of the spectrum in and near the infra-red region, in one of which parts (0.8 to 0.9 microns) water is relatively transparent and the other of which parts (1.2 to 1.6 microns) water is more strongly absorbent is transmitted through a bottle, and the intensities of the emergent energies in the two parts are separately measured by a silicon detector and a germanium detector, associated with respective collimator tubes and filters, and are compared to produce a signal indicative of the presence of water in the bottle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.