Stencilling a unique machine-readable marking on each of a plurality of workpieces
US4497848A · kind A · utility
14Cited by
9References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 28, 1983 |
| Grant date | Feb 5, 1985 |
| Priority date | — |
| Expiry date | Oct 28, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Method and apparatus are described for producing a unique machine-readable marking, such as a bar-code marking, on each of a succession of workpieces, such as glass envelope parts of cathode-ray tubes. The method comprises producing and applying a different unique stencil for each workpiece and then applying a suitable paint through the stencil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.