Concentration detector for colored toner
US5570193A · kind A · utility
51Cited by
5References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1995 |
| Grant date | Oct 29, 1996 |
| Priority date | — |
| Expiry date | Feb 27, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/534
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for detecting concentrations of colored toner particles in the presence of black or other absorbing toner particles including a light source, a light detector having a field of view of less than about .+-.10 degrees and preferably less than .+-.5 degrees, apparatus for supplying a dispersion of colored toner particles optionally containing undesirable contamination by black toner particles between the light source and the detector and computing circuitry operative for determining the concentration of the colored toner particles utilizing output from the light detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.