Plastics identification
US5608326A · kind A · utility
4Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1995 |
| Grant date | Mar 4, 1997 |
| Priority date | — |
| Expiry date | Jul 21, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/60
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Triboelectricity, that is the electrostatic charging of materials by rubbing them against one another, is used to identify particular plastics materials which produce a characteristic charge polarity when rubbed against another known material. An apparatus (24) for carrying out this identification mounts different reference materials (30, 32, 34) so that they can be rubbed against the material (44) to be identified to create electrostatic charges which are then processed by a logic circuit to identify the nature of the sample.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.