Glue drop detector
US4215939A · kind A · utility
20Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1977 |
| Grant date | Aug 5, 1980 |
| Priority date | — |
| Expiry date | Dec 22, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention relates to a method and apparatus for determining whether a glue drop is present on the reflective inner surface of a closure. Collimated light is projected onto the reflective inner surface of the closure, and a measurement is taken of the amount of light which remains collimated after reflection from the closure. The measurement of the amount of light reflected in this way is used to determine whether a glue drop is present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.