Sorting apparatus
US4241835A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 12, 1976 |
| Grant date | Dec 30, 1980 |
| Priority date | — |
| Expiry date | Jul 12, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S209/908
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A sorting apparatus wherein a plurality of first and second electrical color signals from a predetermined number of viewer elements is utilized to generate classification signals functionally related to the ratio of the color signals from each viewer and an ejector associated with each viewer is actuated if a comparison of each ratio classification signal with predetermined references indicates an unacceptably colored product or foreign object is characterized by a foreign object ejector arrangement being operable if the ratio classification signal falls within a predetermined defined range of signal values. A threshold network actuates the foreign object ejector arrangement only if an article is detected within the field of view of the viewer elements. Circuitry to present a substitute classification signal within the predetermined range of signal values if the electrical color signals are of equal value is provided. Also, a power supply associated with the sorting apparatus is characterized by a capacitive switching arrangement producing positive and negative polarity voltage outputs of a predetermined magnitude from a positive voltage source without the need for transformers or …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.