Cereal grain color sorting apparatus
US5638961A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1995 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Feb 13, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB07C5/366
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a color sorting apparatus comprising: a grain guide device); a grain feed device; optical detecting devices including illuminating devices for illuminating the grain, light-receiving sensors for receiving the intensity of light from the illuminated grain and backgrounds; and an ejector device for removing the grain, the illuminating devices comprise first light sources having a spectral energy distribution in a visible light region and second light sources having a spectral energy distribution in a near-infrared region, and the light-receiving sensors comprise a first light-receiving sensor portion having a high sensitivity to light in the visible light region and a second light-receiving sensor portion having a high sensitivity to light in the near-infrared region, so as to detect and remove foreign matter having a different color from the good grain in visible light region as well as to separate and remove other foreign matter having the same color as the good grain or being transparent in near-infrared region with one color sorting apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.