Method and apparatus to correct water drift
US7008802B2 · kind B2 · utility
33Cited by
47References
45Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 29, 2001 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Jul 24, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S414/136
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is provided for determining workpiece drift from its nominal or intended position. The apparatus includes two proportionate sensors, each of which gives an output reading that depends upon how much of the sensor beam is blocked by an edge of the workpiece. A computer can calculate positional drift based upon these readings. Also disclosed is a method for aligning proportionate sensors to be parallel to one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.