Sorting apparatus
US4074808A · kind A · utility
14Cited by
8References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1976 |
| Grant date | Feb 21, 1978 |
| Priority date | — |
| Expiry date | Apr 30, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB07C5/3425
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Optical sorting apparatus wherein during sorting, articles are directed to free fall through an illuminated inspection chamber. A light reflecting background positioned in the chamber is adjustable to form a variable reference standard of reflectivity. A sensor positioned to receive light from the background establishes a reference level and also receives reflected light from objects passing through the chamber. A change in detected light level from the reference level is indicative of a property of an article to be sorted for selectively effecting sortation of the article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.